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/*
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* Copyright 2000-2007 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package sun.awt.datatransfer;
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import java.awt.AWTError;
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import java.awt.EventQueue;
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import java.awt.Image;
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import java.awt.Graphics;
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import java.awt.Toolkit;
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import java.awt.datatransfer.DataFlavor;
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import java.awt.datatransfer.FlavorMap;
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import java.awt.datatransfer.FlavorTable;
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import java.awt.datatransfer.StringSelection;
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import java.awt.datatransfer.Transferable;
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import java.awt.datatransfer.UnsupportedFlavorException;
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import java.io.BufferedReader;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.IOException;
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import java.io.ObjectInputStream;
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import java.io.ObjectOutputStream;
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import java.io.Reader;
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import java.io.SequenceInputStream;
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import java.io.StringReader;
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import java.nio.ByteBuffer;
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import java.nio.CharBuffer;
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import java.nio.charset.Charset;
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import java.nio.charset.CharsetEncoder;
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import java.nio.charset.IllegalCharsetNameException;
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import java.nio.charset.UnsupportedCharsetException;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.lang.reflect.Modifier;
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import java.rmi.MarshalledObject;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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import java.security.PrivilegedActionException;
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import java.security.PrivilegedExceptionAction;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import java.util.SortedMap;
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import java.util.SortedSet;
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import java.util.Set;
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import java.util.Stack;
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import java.util.TreeMap;
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import java.util.TreeSet;
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import java.util.logging.*;
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import sun.awt.AppContext;
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import sun.awt.SunToolkit;
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import java.awt.image.BufferedImage;
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import java.awt.image.ImageObserver;
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import java.awt.image.RenderedImage;
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import java.awt.image.WritableRaster;
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import java.awt.image.ColorModel;
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import javax.imageio.ImageIO;
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import javax.imageio.ImageReader;
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import javax.imageio.ImageReadParam;
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import javax.imageio.ImageWriter;
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import javax.imageio.ImageTypeSpecifier;
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import javax.imageio.spi.ImageWriterSpi;
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import javax.imageio.stream.ImageInputStream;
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import javax.imageio.stream.ImageOutputStream;
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import sun.awt.image.ImageRepresentation;
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import sun.awt.image.ToolkitImage;
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/**
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* Provides a set of functions to be shared among the DataFlavor class and
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* platform-specific data transfer implementations.
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*
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* The concept of "flavors" and "natives" is extended to include "formats",
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* which are the numeric values Win32 and X11 use to express particular data
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* types. Like FlavorMap, which provides getNativesForFlavors(DataFlavor[]) and
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* getFlavorsForNatives(String[]) functions, DataTransferer provides a set
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* of getFormatsFor(Transferable|Flavor|Flavors) and
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* getFlavorsFor(Format|Formats) functions.
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*
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* Also provided are functions for translating a Transferable into a byte
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* array, given a source DataFlavor and a target format, and for translating
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* a byte array or InputStream into an Object, given a source format and
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* a target DataFlavor.
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*
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* @author David Mendenhall
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* @author Danila Sinopalnikov
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*
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* @since 1.3.1
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*/
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public abstract class DataTransferer {
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/**
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* Cached value of Class.forName("[C");
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*/
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public static final Class charArrayClass;
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/**
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* Cached value of Class.forName("[B");
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*/
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public static final Class byteArrayClass;
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/**
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* The <code>DataFlavor</code> representing plain text with Unicode
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* encoding, where:
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* <pre>
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* representationClass = java.lang.String
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* mimeType = "text/plain; charset=Unicode"
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* </pre>
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*/
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public static final DataFlavor plainTextStringFlavor;
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/**
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* The <code>DataFlavor</code> representing a Java text encoding String
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* encoded in UTF-8, where
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* <pre>
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* representationClass = [B
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* mimeType = "application/x-java-text-encoding"
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* </pre>
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*/
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public static final DataFlavor javaTextEncodingFlavor;
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private static SortedSet standardEncodings;
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/**
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* Tracks whether a particular text/* MIME type supports the charset
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* parameter. The Map is initialized with all of the standard MIME types
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* listed in the DataFlavor.selectBestTextFlavor method comment. Additional
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* entries may be added during the life of the JRE for text/<other> types.
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*/
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private static final Map textMIMESubtypeCharsetSupport;
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/**
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* Cache of the platform default encoding as specified in the
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* "file.encoding" system property.
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*/
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private static String defaultEncoding;
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/**
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* A collection of all natives listed in flavormap.properties with
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* a primary MIME type of "text".
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*/
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private static final Set textNatives =
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Collections.synchronizedSet(new HashSet());
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/**
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* The native encodings/charsets for the Set of textNatives.
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*/
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private static final Map nativeCharsets =
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Collections.synchronizedMap(new HashMap());
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/**
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* The end-of-line markers for the Set of textNatives.
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*/
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private static final Map nativeEOLNs =
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Collections.synchronizedMap(new HashMap());
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/**
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* The number of terminating NUL bytes for the Set of textNatives.
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*/
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private static final Map nativeTerminators =
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Collections.synchronizedMap(new HashMap());
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/**
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* The key used to store pending data conversion requests for an AppContext.
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*/
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private static final String DATA_CONVERTER_KEY = "DATA_CONVERTER_KEY";
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/**
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* The singleton DataTransferer instance. It is created during MToolkit
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* or WToolkit initialization.
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*/
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private static DataTransferer transferer;
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private static final Logger dtLog = Logger.getLogger("sun.awt.datatransfer.DataTransfer");
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static {
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Class tCharArrayClass = null, tByteArrayClass = null;
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try {
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tCharArrayClass = Class.forName("[C");
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tByteArrayClass = Class.forName("[B");
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} catch (ClassNotFoundException cannotHappen) {
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}
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charArrayClass = tCharArrayClass;
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byteArrayClass = tByteArrayClass;
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DataFlavor tPlainTextStringFlavor = null;
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try {
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tPlainTextStringFlavor = new DataFlavor
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("text/plain;charset=Unicode;class=java.lang.String");
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} catch (ClassNotFoundException cannotHappen) {
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}
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plainTextStringFlavor = tPlainTextStringFlavor;
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DataFlavor tJavaTextEncodingFlavor = null;
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try {
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tJavaTextEncodingFlavor = new DataFlavor
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("application/x-java-text-encoding;class=\"[B\"");
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} catch (ClassNotFoundException cannotHappen) {
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}
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javaTextEncodingFlavor = tJavaTextEncodingFlavor;
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Map tempMap = new HashMap(17);
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tempMap.put("sgml", Boolean.TRUE);
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tempMap.put("xml", Boolean.TRUE);
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tempMap.put("html", Boolean.TRUE);
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tempMap.put("enriched", Boolean.TRUE);
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tempMap.put("richtext", Boolean.TRUE);
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tempMap.put("uri-list", Boolean.TRUE);
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tempMap.put("directory", Boolean.TRUE);
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tempMap.put("css", Boolean.TRUE);
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tempMap.put("calendar", Boolean.TRUE);
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tempMap.put("plain", Boolean.TRUE);
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tempMap.put("rtf", Boolean.FALSE);
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tempMap.put("tab-separated-values", Boolean.FALSE);
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tempMap.put("t140", Boolean.FALSE);
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tempMap.put("rfc822-headers", Boolean.FALSE);
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tempMap.put("parityfec", Boolean.FALSE);
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textMIMESubtypeCharsetSupport = Collections.synchronizedMap(tempMap);
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}
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/**
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* The accessor method for the singleton DataTransferer instance. Note
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* that in a headless environment, there may be no DataTransferer instance;
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* instead, null will be returned.
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*/
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public static DataTransferer getInstance() {
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if (transferer == null) {
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synchronized (DataTransferer.class) {
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if (transferer == null) {
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final String name = SunToolkit.
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getDataTransfererClassName();
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if (name != null) {
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PrivilegedAction action = new PrivilegedAction() {
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public Object run() {
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Class cls = null;
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Method method = null;
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Object ret = null;
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try {
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cls = Class.forName(name);
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} catch (ClassNotFoundException e) {
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ClassLoader cl = ClassLoader.
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getSystemClassLoader();
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if (cl != null) {
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try {
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cls = cl.loadClass(name);
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} catch (ClassNotFoundException ee) {
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ee.printStackTrace();
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throw new AWTError("DataTransferer not found: " + name);
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}
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}
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}
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if (cls != null) {
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try {
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method = cls.getDeclaredMethod
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("getInstanceImpl");
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method.setAccessible(true);
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} catch (NoSuchMethodException e) {
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e.printStackTrace();
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throw new AWTError("Cannot instantiate DataTransferer: " + name);
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} catch (SecurityException e) {
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e.printStackTrace();
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throw new AWTError("Access is denied for DataTransferer: " + name);
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}
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}
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if (method != null) {
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try {
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ret = method.invoke(null);
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} catch (InvocationTargetException e) {
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e.printStackTrace();
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throw new AWTError("Cannot instantiate DataTransferer: " + name);
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} catch (IllegalAccessException e) {
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e.printStackTrace();
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throw new AWTError("Cannot access DataTransferer: " + name);
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}
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}
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return ret;
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}
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};
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transferer = (DataTransferer)
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AccessController.doPrivileged(action);
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}
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}
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}
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}
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return transferer;
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}
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/**
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* Converts an arbitrary text encoding to its canonical name.
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*/
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public static String canonicalName(String encoding) {
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if (encoding == null) {
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return null;
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}
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try {
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return Charset.forName(encoding).name();
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} catch (IllegalCharsetNameException icne) {
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return encoding;
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} catch (UnsupportedCharsetException uce) {
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return encoding;
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}
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}
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/**
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* If the specified flavor is a text flavor which supports the "charset"
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* parameter, then this method returns that parameter, or the default
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* charset if no such parameter was specified at construction. For non-
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* text DataFlavors, and for non-charset text flavors, this method returns
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* null.
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*/
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public static String getTextCharset(DataFlavor flavor) {
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if (!isFlavorCharsetTextType(flavor)) {
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return null;
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}
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String encoding = flavor.getParameter("charset");
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return (encoding != null) ? encoding : getDefaultTextCharset();
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}
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/**
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* Returns the platform's default character encoding.
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*/
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public static String getDefaultTextCharset() {
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if (defaultEncoding != null) {
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return defaultEncoding;
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}
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return defaultEncoding = Charset.defaultCharset().name();
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}
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/**
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* Tests only whether the flavor's MIME type supports the charset
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* parameter. Must only be called for flavors with a primary type of
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* "text".
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*/
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public static boolean doesSubtypeSupportCharset(DataFlavor flavor) {
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if (dtLog.isLoggable(Level.FINE)) {
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if (!"text".equals(flavor.getPrimaryType())) {
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dtLog.log(Level.FINE, "Assertion (\"text\".equals(flavor.getPrimaryType())) failed");
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}
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}
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String subType = flavor.getSubType();
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if (subType == null) {
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return false;
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}
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Object support = textMIMESubtypeCharsetSupport.get(subType);
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397 |
if (support != null) {
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return (support == Boolean.TRUE);
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}
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boolean ret_val = (flavor.getParameter("charset") != null);
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textMIMESubtypeCharsetSupport.put
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(subType, (ret_val) ? Boolean.TRUE : Boolean.FALSE);
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return ret_val;
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}
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|
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public static boolean doesSubtypeSupportCharset(String subType,
|
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407 |
String charset)
|
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{
|
|
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Object support = textMIMESubtypeCharsetSupport.get(subType);
|
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410 |
|
|
411 |
if (support != null) {
|
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return (support == Boolean.TRUE);
|
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413 |
}
|
|
414 |
|
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415 |
boolean ret_val = (charset != null);
|
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textMIMESubtypeCharsetSupport.put
|
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(subType, (ret_val) ? Boolean.TRUE : Boolean.FALSE);
|
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418 |
return ret_val;
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419 |
}
|
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420 |
|
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421 |
/**
|
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422 |
* Returns whether this flavor is a text type which supports the
|
|
423 |
* 'charset' parameter.
|
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424 |
*/
|
|
425 |
public static boolean isFlavorCharsetTextType(DataFlavor flavor) {
|
|
426 |
// Although stringFlavor doesn't actually support the charset
|
|
427 |
// parameter (because its primary MIME type is not "text"), it should
|
|
428 |
// be treated as though it does. stringFlavor is semantically
|
|
429 |
// equivalent to "text/plain" data.
|
|
430 |
if (DataFlavor.stringFlavor.equals(flavor)) {
|
|
431 |
return true;
|
|
432 |
}
|
|
433 |
|
|
434 |
if (!"text".equals(flavor.getPrimaryType()) ||
|
|
435 |
!doesSubtypeSupportCharset(flavor))
|
|
436 |
{
|
|
437 |
return false;
|
|
438 |
}
|
|
439 |
|
|
440 |
Class rep_class = flavor.getRepresentationClass();
|
|
441 |
|
|
442 |
if (flavor.isRepresentationClassReader() ||
|
|
443 |
String.class.equals(rep_class) ||
|
|
444 |
flavor.isRepresentationClassCharBuffer() ||
|
|
445 |
DataTransferer.charArrayClass.equals(rep_class))
|
|
446 |
{
|
|
447 |
return true;
|
|
448 |
}
|
|
449 |
|
|
450 |
if (!(flavor.isRepresentationClassInputStream() ||
|
|
451 |
flavor.isRepresentationClassByteBuffer() ||
|
|
452 |
DataTransferer.byteArrayClass.equals(rep_class))) {
|
|
453 |
return false;
|
|
454 |
}
|
|
455 |
|
|
456 |
String charset = flavor.getParameter("charset");
|
|
457 |
|
|
458 |
return (charset != null)
|
|
459 |
? DataTransferer.isEncodingSupported(charset)
|
|
460 |
: true; // null equals default encoding which is always supported
|
|
461 |
}
|
|
462 |
|
|
463 |
/**
|
|
464 |
* Returns whether this flavor is a text type which does not support the
|
|
465 |
* 'charset' parameter.
|
|
466 |
*/
|
|
467 |
public static boolean isFlavorNoncharsetTextType(DataFlavor flavor) {
|
|
468 |
if (!"text".equals(flavor.getPrimaryType()) ||
|
|
469 |
doesSubtypeSupportCharset(flavor))
|
|
470 |
{
|
|
471 |
return false;
|
|
472 |
}
|
|
473 |
|
|
474 |
return (flavor.isRepresentationClassInputStream() ||
|
|
475 |
flavor.isRepresentationClassByteBuffer() ||
|
|
476 |
DataTransferer.byteArrayClass.
|
|
477 |
equals(flavor.getRepresentationClass()));
|
|
478 |
}
|
|
479 |
|
|
480 |
/**
|
|
481 |
* Determines whether this JRE can both encode and decode text in the
|
|
482 |
* specified encoding.
|
|
483 |
*/
|
|
484 |
public static boolean isEncodingSupported(String encoding) {
|
|
485 |
if (encoding == null) {
|
|
486 |
return false;
|
|
487 |
}
|
|
488 |
try {
|
|
489 |
return Charset.isSupported(encoding);
|
|
490 |
} catch (IllegalCharsetNameException icne) {
|
|
491 |
return false;
|
|
492 |
}
|
|
493 |
}
|
|
494 |
|
|
495 |
/**
|
|
496 |
* Returns an Iterator which traverses a SortedSet of Strings which are
|
|
497 |
* a total order of the standard character sets supported by the JRE. The
|
|
498 |
* ordering follows the same principles as DataFlavor.selectBestTextFlavor.
|
|
499 |
* So as to avoid loading all available character converters, optional,
|
|
500 |
* non-standard, character sets are not included.
|
|
501 |
*/
|
|
502 |
public static Iterator standardEncodings() {
|
|
503 |
if (standardEncodings == null) {
|
|
504 |
TreeSet tempSet = new TreeSet(defaultCharsetComparator);
|
|
505 |
tempSet.add("US-ASCII");
|
|
506 |
tempSet.add("ISO-8859-1");
|
|
507 |
tempSet.add("UTF-8");
|
|
508 |
tempSet.add("UTF-16BE");
|
|
509 |
tempSet.add("UTF-16LE");
|
|
510 |
tempSet.add("UTF-16");
|
|
511 |
tempSet.add(getDefaultTextCharset());
|
|
512 |
standardEncodings = Collections.unmodifiableSortedSet(tempSet);
|
|
513 |
}
|
|
514 |
return standardEncodings.iterator();
|
|
515 |
}
|
|
516 |
|
|
517 |
/**
|
|
518 |
* Converts a FlavorMap to a FlavorTable.
|
|
519 |
*/
|
|
520 |
public static FlavorTable adaptFlavorMap(final FlavorMap map) {
|
|
521 |
if (map instanceof FlavorTable) {
|
|
522 |
return (FlavorTable)map;
|
|
523 |
}
|
|
524 |
|
|
525 |
return new FlavorTable() {
|
|
526 |
public Map getNativesForFlavors(DataFlavor[] flavors) {
|
|
527 |
return map.getNativesForFlavors(flavors);
|
|
528 |
}
|
|
529 |
public Map getFlavorsForNatives(String[] natives) {
|
|
530 |
return map.getFlavorsForNatives(natives);
|
|
531 |
}
|
|
532 |
public List getNativesForFlavor(DataFlavor flav) {
|
|
533 |
Map natives =
|
|
534 |
getNativesForFlavors(new DataFlavor[] { flav } );
|
|
535 |
String nat = (String)natives.get(flav);
|
|
536 |
if (nat != null) {
|
|
537 |
List list = new ArrayList(1);
|
|
538 |
list.add(nat);
|
|
539 |
return list;
|
|
540 |
} else {
|
|
541 |
return Collections.EMPTY_LIST;
|
|
542 |
}
|
|
543 |
}
|
|
544 |
public List getFlavorsForNative(String nat) {
|
|
545 |
Map flavors =
|
|
546 |
getFlavorsForNatives(new String[] { nat } );
|
|
547 |
DataFlavor flavor = (DataFlavor)flavors.get(nat);
|
|
548 |
if (flavor != null) {
|
|
549 |
List list = new ArrayList(1);
|
|
550 |
list.add(flavor);
|
|
551 |
return list;
|
|
552 |
} else {
|
|
553 |
return Collections.EMPTY_LIST;
|
|
554 |
}
|
|
555 |
}
|
|
556 |
};
|
|
557 |
}
|
|
558 |
|
|
559 |
/**
|
|
560 |
* Returns the default Unicode encoding for the platform. The encoding
|
|
561 |
* need not be canonical. This method is only used by the archaic function
|
|
562 |
* DataFlavor.getTextPlainUnicodeFlavor().
|
|
563 |
*/
|
|
564 |
public abstract String getDefaultUnicodeEncoding();
|
|
565 |
|
|
566 |
/**
|
|
567 |
* This method is called for text flavor mappings established while parsing
|
|
568 |
* the flavormap.properties file. It stores the "eoln" and "terminators"
|
|
569 |
* parameters which are not officially part of the MIME type. They are
|
|
570 |
* MIME parameters specific to the flavormap.properties file format.
|
|
571 |
*/
|
|
572 |
public void registerTextFlavorProperties(String nat, String charset,
|
|
573 |
String eoln, String terminators) {
|
|
574 |
Long format = getFormatForNativeAsLong(nat);
|
|
575 |
|
|
576 |
textNatives.add(format);
|
|
577 |
nativeCharsets.put(format, (charset != null && charset.length() != 0)
|
|
578 |
? charset : getDefaultTextCharset());
|
|
579 |
if (eoln != null && eoln.length() != 0 && !eoln.equals("\n")) {
|
|
580 |
nativeEOLNs.put(format, eoln);
|
|
581 |
}
|
|
582 |
if (terminators != null && terminators.length() != 0) {
|
|
583 |
Integer iTerminators = Integer.valueOf(terminators);
|
|
584 |
if (iTerminators.intValue() > 0) {
|
|
585 |
nativeTerminators.put(format, iTerminators);
|
|
586 |
}
|
|
587 |
}
|
|
588 |
}
|
|
589 |
|
|
590 |
/**
|
|
591 |
* Determines whether the native corresponding to the specified long format
|
|
592 |
* was listed in the flavormap.properties file.
|
|
593 |
*/
|
|
594 |
protected boolean isTextFormat(long format) {
|
|
595 |
return textNatives.contains(Long.valueOf(format));
|
|
596 |
}
|
|
597 |
|
|
598 |
protected String getCharsetForTextFormat(Long lFormat) {
|
|
599 |
return (String)nativeCharsets.get(lFormat);
|
|
600 |
}
|
|
601 |
|
|
602 |
/**
|
|
603 |
* Specifies whether text imported from the native system in the specified
|
|
604 |
* format is locale-dependent. If so, when decoding such text,
|
|
605 |
* 'nativeCharsets' should be ignored, and instead, the Transferable should
|
|
606 |
* be queried for its javaTextEncodingFlavor data for the correct encoding.
|
|
607 |
*/
|
|
608 |
public abstract boolean isLocaleDependentTextFormat(long format);
|
|
609 |
|
|
610 |
/**
|
|
611 |
* Determines whether the DataFlavor corresponding to the specified long
|
|
612 |
* format is DataFlavor.javaFileListFlavor.
|
|
613 |
*/
|
|
614 |
public abstract boolean isFileFormat(long format);
|
|
615 |
|
|
616 |
/**
|
|
617 |
* Determines whether the DataFlavor corresponding to the specified long
|
|
618 |
* format is DataFlavor.imageFlavor.
|
|
619 |
*/
|
|
620 |
public abstract boolean isImageFormat(long format);
|
|
621 |
|
|
622 |
/**
|
|
623 |
* Returns a Map whose keys are all of the possible formats into which the
|
|
624 |
* Transferable's transfer data flavors can be translated. The value of
|
|
625 |
* each key is the DataFlavor in which the Transferable's data should be
|
|
626 |
* requested when converting to the format.
|
|
627 |
* <p>
|
|
628 |
* The map keys are sorted according to the native formats preference
|
|
629 |
* order.
|
|
630 |
*/
|
|
631 |
public SortedMap getFormatsForTransferable(Transferable contents,
|
|
632 |
FlavorTable map) {
|
|
633 |
DataFlavor[] flavors = contents.getTransferDataFlavors();
|
|
634 |
if (flavors == null) {
|
|
635 |
return new TreeMap();
|
|
636 |
}
|
|
637 |
return getFormatsForFlavors(flavors, map);
|
|
638 |
}
|
|
639 |
|
|
640 |
/**
|
|
641 |
* Returns a Map whose keys are all of the possible formats into which data
|
|
642 |
* in the specified DataFlavor can be translated. The value of each key
|
|
643 |
* is the DataFlavor in which a Transferable's data should be requested
|
|
644 |
* when converting to the format.
|
|
645 |
* <p>
|
|
646 |
* The map keys are sorted according to the native formats preference
|
|
647 |
* order.
|
|
648 |
*/
|
|
649 |
public SortedMap getFormatsForFlavor(DataFlavor flavor, FlavorTable map) {
|
|
650 |
return getFormatsForFlavors(new DataFlavor[] { flavor },
|
|
651 |
map);
|
|
652 |
}
|
|
653 |
|
|
654 |
/**
|
|
655 |
* Returns a Map whose keys are all of the possible formats into which data
|
|
656 |
* in the specified DataFlavors can be translated. The value of each key
|
|
657 |
* is the DataFlavor in which the Transferable's data should be requested
|
|
658 |
* when converting to the format.
|
|
659 |
* <p>
|
|
660 |
* The map keys are sorted according to the native formats preference
|
|
661 |
* order.
|
|
662 |
*
|
|
663 |
* @param flavors the data flavors
|
|
664 |
* @param map the FlavorTable which contains mappings between
|
|
665 |
* DataFlavors and data formats
|
|
666 |
* @throws NullPointerException if flavors or map is <code>null</code>
|
|
667 |
*/
|
|
668 |
public SortedMap getFormatsForFlavors(DataFlavor[] flavors, FlavorTable map) {
|
|
669 |
Map formatMap = new HashMap(flavors.length);
|
|
670 |
Map textPlainMap = new HashMap(flavors.length);
|
|
671 |
// Maps formats to indices that will be used to sort the formats
|
|
672 |
// according to the preference order.
|
|
673 |
// Larger index value corresponds to the more preferable format.
|
|
674 |
Map indexMap = new HashMap(flavors.length);
|
|
675 |
Map textPlainIndexMap = new HashMap(flavors.length);
|
|
676 |
|
|
677 |
int currentIndex = 0;
|
|
678 |
|
|
679 |
// Iterate backwards so that preferred DataFlavors are used over
|
|
680 |
// other DataFlavors. (See javadoc for
|
|
681 |
// Transferable.getTransferDataFlavors.)
|
|
682 |
for (int i = flavors.length - 1; i >= 0; i--) {
|
|
683 |
DataFlavor flavor = flavors[i];
|
|
684 |
if (flavor == null) continue;
|
|
685 |
|
|
686 |
// Don't explicitly test for String, since it is just a special
|
|
687 |
// case of Serializable
|
|
688 |
if (flavor.isFlavorTextType() ||
|
|
689 |
flavor.isFlavorJavaFileListType() ||
|
|
690 |
DataFlavor.imageFlavor.equals(flavor) ||
|
|
691 |
flavor.isRepresentationClassSerializable() ||
|
|
692 |
flavor.isRepresentationClassInputStream() ||
|
|
693 |
flavor.isRepresentationClassRemote())
|
|
694 |
{
|
|
695 |
List natives = map.getNativesForFlavor(flavor);
|
|
696 |
|
|
697 |
currentIndex += natives.size();
|
|
698 |
|
|
699 |
for (Iterator iter = natives.iterator(); iter.hasNext(); ) {
|
|
700 |
Long lFormat =
|
|
701 |
getFormatForNativeAsLong((String)iter.next());
|
|
702 |
Integer index = Integer.valueOf(currentIndex--);
|
|
703 |
|
|
704 |
formatMap.put(lFormat, flavor);
|
|
705 |
indexMap.put(lFormat, index);
|
|
706 |
|
|
707 |
// SystemFlavorMap.getNativesForFlavor will return
|
|
708 |
// text/plain natives for all text/*. While this is good
|
|
709 |
// for a single text/* flavor, we would prefer that
|
|
710 |
// text/plain native data come from a text/plain flavor.
|
|
711 |
if (("text".equals(flavor.getPrimaryType()) &&
|
|
712 |
"plain".equals(flavor.getSubType())) ||
|
|
713 |
flavor.equals(DataFlavor.stringFlavor))
|
|
714 |
{
|
|
715 |
textPlainMap.put(lFormat, flavor);
|
|
716 |
textPlainIndexMap.put(lFormat, index);
|
|
717 |
}
|
|
718 |
}
|
|
719 |
|
|
720 |
currentIndex += natives.size();
|
|
721 |
}
|
|
722 |
}
|
|
723 |
|
|
724 |
formatMap.putAll(textPlainMap);
|
|
725 |
indexMap.putAll(textPlainIndexMap);
|
|
726 |
|
|
727 |
// Sort the map keys according to the formats preference order.
|
|
728 |
Comparator comparator =
|
|
729 |
new IndexOrderComparator(indexMap, IndexedComparator.SELECT_WORST);
|
|
730 |
SortedMap sortedMap = new TreeMap(comparator);
|
|
731 |
sortedMap.putAll(formatMap);
|
|
732 |
|
|
733 |
return sortedMap;
|
|
734 |
}
|
|
735 |
|
|
736 |
/**
|
|
737 |
* Reduces the Map output for the root function to an array of the
|
|
738 |
* Map's keys.
|
|
739 |
*/
|
|
740 |
public long[] getFormatsForTransferableAsArray(Transferable contents,
|
|
741 |
FlavorTable map) {
|
|
742 |
return keysToLongArray(getFormatsForTransferable(contents, map));
|
|
743 |
}
|
|
744 |
public long[] getFormatsForFlavorAsArray(DataFlavor flavor,
|
|
745 |
FlavorTable map) {
|
|
746 |
return keysToLongArray(getFormatsForFlavor(flavor, map));
|
|
747 |
}
|
|
748 |
public long[] getFormatsForFlavorsAsArray(DataFlavor[] flavors,
|
|
749 |
FlavorTable map) {
|
|
750 |
return keysToLongArray(getFormatsForFlavors(flavors, map));
|
|
751 |
}
|
|
752 |
|
|
753 |
/**
|
|
754 |
* Returns a Map whose keys are all of the possible DataFlavors into which
|
|
755 |
* data in the specified format can be translated. The value of each key
|
|
756 |
* is the format in which the Clipboard or dropped data should be requested
|
|
757 |
* when converting to the DataFlavor.
|
|
758 |
*/
|
|
759 |
public Map getFlavorsForFormat(long format, FlavorTable map) {
|
|
760 |
return getFlavorsForFormats(new long[] { format }, map);
|
|
761 |
}
|
|
762 |
|
|
763 |
/**
|
|
764 |
* Returns a Map whose keys are all of the possible DataFlavors into which
|
|
765 |
* data in the specified formats can be translated. The value of each key
|
|
766 |
* is the format in which the Clipboard or dropped data should be requested
|
|
767 |
* when converting to the DataFlavor.
|
|
768 |
*/
|
|
769 |
public Map getFlavorsForFormats(long[] formats, FlavorTable map) {
|
|
770 |
Map flavorMap = new HashMap(formats.length);
|
|
771 |
Set mappingSet = new HashSet(formats.length);
|
|
772 |
Set flavorSet = new HashSet(formats.length);
|
|
773 |
|
|
774 |
// First step: build flavorSet, mappingSet and initial flavorMap
|
|
775 |
// flavorSet - the set of all the DataFlavors into which
|
|
776 |
// data in the specified formats can be translated;
|
|
777 |
// mappingSet - the set of all the mappings from the specified formats
|
|
778 |
// into any DataFlavor;
|
|
779 |
// flavorMap - after this step, this map maps each of the DataFlavors
|
|
780 |
// from flavorSet to any of the specified formats.
|
|
781 |
for (int i = 0; i < formats.length; i++) {
|
|
782 |
long format = formats[i];
|
|
783 |
String nat = getNativeForFormat(format);
|
|
784 |
List flavors = map.getFlavorsForNative(nat);
|
|
785 |
|
|
786 |
for (Iterator iter = flavors.iterator(); iter.hasNext(); ) {
|
|
787 |
DataFlavor flavor = (DataFlavor)iter.next();
|
|
788 |
|
|
789 |
// Don't explicitly test for String, since it is just a special
|
|
790 |
// case of Serializable
|
|
791 |
if (flavor.isFlavorTextType() ||
|
|
792 |
flavor.isFlavorJavaFileListType() ||
|
|
793 |
DataFlavor.imageFlavor.equals(flavor) ||
|
|
794 |
flavor.isRepresentationClassSerializable() ||
|
|
795 |
flavor.isRepresentationClassInputStream() ||
|
|
796 |
flavor.isRepresentationClassRemote())
|
|
797 |
{
|
|
798 |
Long lFormat = Long.valueOf(format);
|
|
799 |
Object mapping =
|
|
800 |
DataTransferer.createMapping(lFormat, flavor);
|
|
801 |
flavorMap.put(flavor, lFormat);
|
|
802 |
mappingSet.add(mapping);
|
|
803 |
flavorSet.add(flavor);
|
|
804 |
}
|
|
805 |
}
|
|
806 |
}
|
|
807 |
|
|
808 |
// Second step: for each DataFlavor try to figure out which of the
|
|
809 |
// specified formats is the best to translate to this flavor.
|
|
810 |
// Then map each flavor to the best format.
|
|
811 |
// For the given flavor, FlavorTable indicates which native will
|
|
812 |
// best reflect data in the specified flavor to the underlying native
|
|
813 |
// platform. We assume that this native is the best to translate
|
|
814 |
// to this flavor.
|
|
815 |
// Note: FlavorTable allows one-way mappings, so we can occasionally
|
|
816 |
// map a flavor to the format for which the corresponding
|
|
817 |
// format-to-flavor mapping doesn't exist. For this reason we have built
|
|
818 |
// a mappingSet of all format-to-flavor mappings for the specified formats
|
|
819 |
// and check if the format-to-flavor mapping exists for the
|
|
820 |
// (flavor,format) pair being added.
|
|
821 |
for (Iterator flavorIter = flavorSet.iterator();
|
|
822 |
flavorIter.hasNext(); ) {
|
|
823 |
DataFlavor flavor = (DataFlavor)flavorIter.next();
|
|
824 |
|
|
825 |
List natives = map.getNativesForFlavor(flavor);
|
|
826 |
|
|
827 |
for (Iterator nativeIter = natives.iterator();
|
|
828 |
nativeIter.hasNext(); ) {
|
|
829 |
Long lFormat =
|
|
830 |
getFormatForNativeAsLong((String)nativeIter.next());
|
|
831 |
Object mapping = DataTransferer.createMapping(lFormat, flavor);
|
|
832 |
|
|
833 |
if (mappingSet.contains(mapping)) {
|
|
834 |
flavorMap.put(flavor, lFormat);
|
|
835 |
break;
|
|
836 |
}
|
|
837 |
}
|
|
838 |
}
|
|
839 |
|
|
840 |
return flavorMap;
|
|
841 |
}
|
|
842 |
|
|
843 |
/**
|
|
844 |
* Returns a Set of all DataFlavors for which
|
|
845 |
* 1) a mapping from at least one of the specified formats exists in the
|
|
846 |
* specified map and
|
|
847 |
* 2) the data translation for this mapping can be performed by the data
|
|
848 |
* transfer subsystem.
|
|
849 |
*
|
|
850 |
* @param formats the data formats
|
|
851 |
* @param map the FlavorTable which contains mappings between
|
|
852 |
* DataFlavors and data formats
|
|
853 |
* @throws NullPointerException if formats or map is <code>null</code>
|
|
854 |
*/
|
|
855 |
public Set getFlavorsForFormatsAsSet(long[] formats, FlavorTable map) {
|
|
856 |
Set flavorSet = new HashSet(formats.length);
|
|
857 |
|
|
858 |
for (int i = 0; i < formats.length; i++) {
|
|
859 |
String nat = getNativeForFormat(formats[i]);
|
|
860 |
List flavors = map.getFlavorsForNative(nat);
|
|
861 |
|
|
862 |
for (Iterator iter = flavors.iterator(); iter.hasNext(); ) {
|
|
863 |
DataFlavor flavor = (DataFlavor)iter.next();
|
|
864 |
|
|
865 |
// Don't explicitly test for String, since it is just a special
|
|
866 |
// case of Serializable
|
|
867 |
if (flavor.isFlavorTextType() ||
|
|
868 |
flavor.isFlavorJavaFileListType() ||
|
|
869 |
DataFlavor.imageFlavor.equals(flavor) ||
|
|
870 |
flavor.isRepresentationClassSerializable() ||
|
|
871 |
flavor.isRepresentationClassInputStream() ||
|
|
872 |
flavor.isRepresentationClassRemote())
|
|
873 |
{
|
|
874 |
flavorSet.add(flavor);
|
|
875 |
}
|
|
876 |
}
|
|
877 |
}
|
|
878 |
|
|
879 |
return flavorSet;
|
|
880 |
}
|
|
881 |
|
|
882 |
/**
|
|
883 |
* Returns an array of all DataFlavors for which
|
|
884 |
* 1) a mapping from the specified format exists in the specified map and
|
|
885 |
* 2) the data translation for this mapping can be performed by the data
|
|
886 |
* transfer subsystem.
|
|
887 |
* The array will be sorted according to a
|
|
888 |
* <code>DataFlavorComparator</code> created with the specified
|
|
889 |
* map as an argument.
|
|
890 |
*
|
|
891 |
* @param format the data format
|
|
892 |
* @param map the FlavorTable which contains mappings between
|
|
893 |
* DataFlavors and data formats
|
|
894 |
* @throws NullPointerException if map is <code>null</code>
|
|
895 |
*/
|
|
896 |
public DataFlavor[] getFlavorsForFormatAsArray(long format,
|
|
897 |
FlavorTable map) {
|
|
898 |
return getFlavorsForFormatsAsArray(new long[] { format }, map);
|
|
899 |
}
|
|
900 |
|
|
901 |
/**
|
|
902 |
* Returns an array of all DataFlavors for which
|
|
903 |
* 1) a mapping from at least one of the specified formats exists in the
|
|
904 |
* specified map and
|
|
905 |
* 2) the data translation for this mapping can be performed by the data
|
|
906 |
* transfer subsystem.
|
|
907 |
* The array will be sorted according to a
|
|
908 |
* <code>DataFlavorComparator</code> created with the specified
|
|
909 |
* map as an argument.
|
|
910 |
*
|
|
911 |
* @param formats the data formats
|
|
912 |
* @param map the FlavorTable which contains mappings between
|
|
913 |
* DataFlavors and data formats
|
|
914 |
* @throws NullPointerException if formats or map is <code>null</code>
|
|
915 |
*/
|
|
916 |
public DataFlavor[] getFlavorsForFormatsAsArray(long[] formats,
|
|
917 |
FlavorTable map) {
|
|
918 |
// getFlavorsForFormatsAsSet() is less expensive than
|
|
919 |
// getFlavorsForFormats().
|
|
920 |
return setToSortedDataFlavorArray(getFlavorsForFormatsAsSet(formats, map));
|
|
921 |
}
|
|
922 |
|
|
923 |
/**
|
|
924 |
* Returns an object that represents a mapping between the specified
|
|
925 |
* key and value. <tt>null</tt> values and the <tt>null</tt> keys are
|
|
926 |
* permitted. The internal representation of the mapping object is
|
|
927 |
* irrelevant. The only requrement is that the two mapping objects are equal
|
|
928 |
* if and only if their keys are equal and their values are equal.
|
|
929 |
* More formally, the two mapping objects are equal if and only if
|
|
930 |
* <tt>(value1 == null ? value2 == null : value1.equals(value2))
|
|
931 |
* && (key1 == null ? key2 == null : key1.equals(key2))</tt>.
|
|
932 |
*/
|
|
933 |
private static Object createMapping(Object key, Object value) {
|
|
934 |
// NOTE: Should be updated to use AbstractMap.SimpleEntry as
|
|
935 |
// soon as it is made public.
|
|
936 |
return Arrays.asList(new Object[] { key, value });
|
|
937 |
}
|
|
938 |
|
|
939 |
/**
|
|
940 |
* Looks-up or registers the String native with the native data transfer
|
|
941 |
* system and returns a long format corresponding to that native.
|
|
942 |
*/
|
|
943 |
protected abstract Long getFormatForNativeAsLong(String str);
|
|
944 |
|
|
945 |
/**
|
|
946 |
* Looks-up the String native corresponding to the specified long format in
|
|
947 |
* the native data transfer system.
|
|
948 |
*/
|
|
949 |
protected abstract String getNativeForFormat(long format);
|
|
950 |
|
|
951 |
/* Contains common code for finding the best charset for
|
|
952 |
* clipboard string encoding/decoding, basing on clipboard
|
|
953 |
* format and localeTransferable(on decoding, if available)
|
|
954 |
*/
|
|
955 |
private String getBestCharsetForTextFormat(Long lFormat,
|
|
956 |
Transferable localeTransferable) throws IOException
|
|
957 |
{
|
|
958 |
String charset = null;
|
|
959 |
if (localeTransferable != null &&
|
|
960 |
isLocaleDependentTextFormat(lFormat) &&
|
|
961 |
localeTransferable.isDataFlavorSupported(javaTextEncodingFlavor))
|
|
962 |
{
|
|
963 |
try {
|
|
964 |
charset = new String(
|
|
965 |
(byte[])localeTransferable.getTransferData(javaTextEncodingFlavor),
|
|
966 |
"UTF-8"
|
|
967 |
);
|
|
968 |
} catch (UnsupportedFlavorException cannotHappen) {
|
|
969 |
}
|
|
970 |
} else {
|
|
971 |
charset = getCharsetForTextFormat(lFormat);
|
|
972 |
}
|
|
973 |
if (charset == null) {
|
|
974 |
// Only happens when we have a custom text type.
|
|
975 |
charset = getDefaultTextCharset();
|
|
976 |
}
|
|
977 |
return charset;
|
|
978 |
}
|
|
979 |
|
|
980 |
/**
|
|
981 |
* Translation function for converting string into
|
|
982 |
* a byte array. Search-and-replace EOLN. Encode into the
|
|
983 |
* target format. Append terminating NUL bytes.
|
|
984 |
*
|
|
985 |
* Java to Native string conversion
|
|
986 |
*/
|
|
987 |
private byte[] translateTransferableString(String str,
|
|
988 |
long format) throws IOException
|
|
989 |
{
|
|
990 |
Long lFormat = Long.valueOf(format);
|
|
991 |
String charset = getBestCharsetForTextFormat(lFormat, null);
|
|
992 |
// Search and replace EOLN. Note that if EOLN is "\n", then we
|
|
993 |
// never added an entry to nativeEOLNs anyway, so we'll skip this
|
|
994 |
// code altogether.
|
|
995 |
// windows: "abc\nde"->"abc\r\nde"
|
|
996 |
String eoln = (String)nativeEOLNs.get(lFormat);
|
|
997 |
if (eoln != null) {
|
|
998 |
int length = str.length();
|
|
999 |
StringBuffer buffer =
|
|
1000 |
new StringBuffer(length * 2); // 2 is a heuristic
|
|
1001 |
for (int i = 0; i < length; i++) {
|
|
1002 |
// Fix for 4914613 - skip native EOLN
|
|
1003 |
if (str.startsWith(eoln, i)) {
|
|
1004 |
buffer.append(eoln);
|
|
1005 |
i += eoln.length() - 1;
|
|
1006 |
continue;
|
|
1007 |
}
|
|
1008 |
char c = str.charAt(i);
|
|
1009 |
if (c == '\n') {
|
|
1010 |
buffer.append(eoln);
|
|
1011 |
} else {
|
|
1012 |
buffer.append(c);
|
|
1013 |
}
|
|
1014 |
}
|
|
1015 |
str = buffer.toString();
|
|
1016 |
}
|
|
1017 |
|
|
1018 |
// Encode text in target format.
|
|
1019 |
byte[] bytes = str.getBytes(charset);
|
|
1020 |
|
|
1021 |
// Append terminating NUL bytes. Note that if terminators is 0,
|
|
1022 |
// the we never added an entry to nativeTerminators anyway, so
|
|
1023 |
// we'll skip code altogether.
|
|
1024 |
// "abcde" -> "abcde\0"
|
|
1025 |
Integer terminators = (Integer)nativeTerminators.get(lFormat);
|
|
1026 |
if (terminators != null) {
|
|
1027 |
int numTerminators = terminators.intValue();
|
|
1028 |
byte[] terminatedBytes =
|
|
1029 |
new byte[bytes.length + numTerminators];
|
|
1030 |
System.arraycopy(bytes, 0, terminatedBytes, 0, bytes.length);
|
|
1031 |
for (int i = bytes.length; i < terminatedBytes.length; i++) {
|
|
1032 |
terminatedBytes[i] = 0x0;
|
|
1033 |
}
|
|
1034 |
bytes = terminatedBytes;
|
|
1035 |
}
|
|
1036 |
return bytes;
|
|
1037 |
}
|
|
1038 |
|
|
1039 |
/**
|
|
1040 |
* Translating either a byte array or an InputStream into an String.
|
|
1041 |
* Strip terminators and search-and-replace EOLN.
|
|
1042 |
*
|
|
1043 |
* Native to Java string conversion
|
|
1044 |
*/
|
|
1045 |
private String translateBytesOrStreamToString(InputStream str, byte[] bytes,
|
|
1046 |
long format,
|
|
1047 |
Transferable localeTransferable)
|
|
1048 |
throws IOException
|
|
1049 |
{
|
|
1050 |
// A String holds all of its data in memory at one time, so
|
|
1051 |
// we can't avoid reading the entire InputStream at this point.
|
|
1052 |
if (bytes == null) {
|
|
1053 |
bytes = inputStreamToByteArray(str);
|
|
1054 |
}
|
|
1055 |
str.close();
|
|
1056 |
|
|
1057 |
Long lFormat = Long.valueOf(format);
|
|
1058 |
String charset = getBestCharsetForTextFormat(lFormat, localeTransferable);
|
|
1059 |
|
|
1060 |
// Locate terminating NUL bytes. Note that if terminators is 0,
|
|
1061 |
// the we never added an entry to nativeTerminators anyway, so
|
|
1062 |
// we'll skip code altogether.
|
|
1063 |
|
|
1064 |
// In other words: we are doing char alignment here basing on suggestion
|
|
1065 |
// that count of zero-'terminators' is a number of bytes in one symbol
|
|
1066 |
// for selected charset (clipboard format). It is not complitly true for
|
|
1067 |
// multibyte coding like UTF-8, but helps understand the procedure.
|
|
1068 |
// "abcde\0" -> "abcde"
|
|
1069 |
|
|
1070 |
String eoln = (String)nativeEOLNs.get(lFormat);
|
|
1071 |
Integer terminators = (Integer)nativeTerminators.get(lFormat);
|
|
1072 |
int count;
|
|
1073 |
if (terminators != null) {
|
|
1074 |
int numTerminators = terminators.intValue();
|
|
1075 |
search:
|
|
1076 |
for (count = 0; count < (bytes.length - numTerminators + 1); count += numTerminators) {
|
|
1077 |
for (int i = count; i < count + numTerminators; i++) {
|
|
1078 |
if (bytes[i] != 0x0) {
|
|
1079 |
continue search;
|
|
1080 |
}
|
|
1081 |
}
|
|
1082 |
// found terminators
|
|
1083 |
break search;
|
|
1084 |
}
|
|
1085 |
} else {
|
|
1086 |
count = bytes.length;
|
|
1087 |
}
|
|
1088 |
|
|
1089 |
// Decode text to chars. Don't include any terminators.
|
|
1090 |
String converted = new String(bytes, 0, count, charset);
|
|
1091 |
|
|
1092 |
// Search and replace EOLN. Note that if EOLN is "\n", then we
|
|
1093 |
// never added an entry to nativeEOLNs anyway, so we'll skip this
|
|
1094 |
// code altogether.
|
|
1095 |
// Count of NUL-terminators and EOLN coding are platform-specific and
|
|
1096 |
// loaded from flavormap.properties file
|
|
1097 |
// windows: "abc\r\nde" -> "abc\nde"
|
|
1098 |
|
|
1099 |
if (eoln != null) {
|
|
1100 |
|
|
1101 |
/* Fix for 4463560: replace EOLNs symbol-by-symbol instead
|
|
1102 |
* of using buf.replace()
|
|
1103 |
*/
|
|
1104 |
|
|
1105 |
char[] buf = converted.toCharArray();
|
|
1106 |
char[] eoln_arr = eoln.toCharArray();
|
|
1107 |
converted = null;
|
|
1108 |
int j = 0;
|
|
1109 |
boolean match;
|
|
1110 |
|
|
1111 |
for (int i = 0; i < buf.length; ) {
|
|
1112 |
// Catch last few bytes
|
|
1113 |
if (i + eoln_arr.length > buf.length) {
|
|
1114 |
buf[j++] = buf[i++];
|
|
1115 |
continue;
|
|
1116 |
}
|
|
1117 |
|
|
1118 |
match = true;
|
|
1119 |
for (int k = 0, l = i; k < eoln_arr.length; k++, l++) {
|
|
1120 |
if (eoln_arr[k] != buf[l]) {
|
|
1121 |
match = false;
|
|
1122 |
break;
|
|
1123 |
}
|
|
1124 |
}
|
|
1125 |
if (match) {
|
|
1126 |
buf[j++] = '\n';
|
|
1127 |
i += eoln_arr.length;
|
|
1128 |
} else {
|
|
1129 |
buf[j++] = buf[i++];
|
|
1130 |
}
|
|
1131 |
}
|
|
1132 |
converted = new String(buf, 0, j);
|
|
1133 |
}
|
|
1134 |
|
|
1135 |
return converted;
|
|
1136 |
}
|
|
1137 |
|
|
1138 |
|
|
1139 |
/**
|
|
1140 |
* Primary translation function for translating a Transferable into
|
|
1141 |
* a byte array, given a source DataFlavor and target format.
|
|
1142 |
*/
|
|
1143 |
public byte[] translateTransferable(Transferable contents,
|
|
1144 |
DataFlavor flavor,
|
|
1145 |
long format) throws IOException
|
|
1146 |
{
|
|
1147 |
// Obtain the transfer data in the source DataFlavor.
|
|
1148 |
//
|
|
1149 |
// Note that we special case DataFlavor.plainTextFlavor because
|
|
1150 |
// StringSelection supports this flavor incorrectly -- instead of
|
|
1151 |
// returning an InputStream as the DataFlavor representation class
|
|
1152 |
// states, it returns a Reader. Instead of using this broken
|
|
1153 |
// functionality, we request the data in stringFlavor (the other
|
|
1154 |
// DataFlavor which StringSelection supports) and use the String
|
|
1155 |
// translator.
|
|
1156 |
Object obj;
|
|
1157 |
boolean stringSelectionHack;
|
|
1158 |
try {
|
|
1159 |
obj = contents.getTransferData(flavor);
|
|
1160 |
if (obj == null) {
|
|
1161 |
return null;
|
|
1162 |
}
|
|
1163 |
if (flavor.equals(DataFlavor.plainTextFlavor) &&
|
|
1164 |
!(obj instanceof InputStream))
|
|
1165 |
{
|
|
1166 |
obj = contents.getTransferData(DataFlavor.stringFlavor);
|
|
1167 |
if (obj == null) {
|
|
1168 |
return null;
|
|
1169 |
}
|
|
1170 |
stringSelectionHack = true;
|
|
1171 |
} else {
|
|
1172 |
stringSelectionHack = false;
|
|
1173 |
}
|
|
1174 |
} catch (UnsupportedFlavorException e) {
|
|
1175 |
throw new IOException(e.getMessage());
|
|
1176 |
}
|
|
1177 |
|
|
1178 |
// Source data is a String. Search-and-replace EOLN. Encode into the
|
|
1179 |
// target format. Append terminating NUL bytes.
|
|
1180 |
if (stringSelectionHack ||
|
|
1181 |
(String.class.equals(flavor.getRepresentationClass()) &&
|
|
1182 |
isFlavorCharsetTextType(flavor) && isTextFormat(format))) {
|
|
1183 |
|
|
1184 |
return translateTransferableString(
|
|
1185 |
(String)obj,
|
|
1186 |
format);
|
|
1187 |
|
|
1188 |
// Source data is a Reader. Convert to a String and recur. In the
|
|
1189 |
// future, we may want to rewrite this so that we encode on demand.
|
|
1190 |
} else if (flavor.isRepresentationClassReader()) {
|
|
1191 |
if (!(isFlavorCharsetTextType(flavor) && isTextFormat(format))) {
|
|
1192 |
throw new IOException
|
|
1193 |
("cannot transfer non-text data as Reader");
|
|
1194 |
}
|
|
1195 |
|
|
1196 |
Reader r = (Reader)obj;
|
|
1197 |
StringBuffer buf = new StringBuffer();
|
|
1198 |
int c;
|
|
1199 |
while ((c = r.read()) != -1) {
|
|
1200 |
buf.append((char)c);
|
|
1201 |
}
|
|
1202 |
r.close();
|
|
1203 |
|
|
1204 |
return translateTransferableString(
|
|
1205 |
buf.toString(),
|
|
1206 |
format);
|
|
1207 |
|
|
1208 |
// Source data is a CharBuffer. Convert to a String and recur.
|
|
1209 |
} else if (flavor.isRepresentationClassCharBuffer()) {
|
|
1210 |
if (!(isFlavorCharsetTextType(flavor) && isTextFormat(format))) {
|
|
1211 |
throw new IOException
|
|
1212 |
("cannot transfer non-text data as CharBuffer");
|
|
1213 |
}
|
|
1214 |
|
|
1215 |
CharBuffer buffer = (CharBuffer)obj;
|
|
1216 |
int size = buffer.remaining();
|
|
1217 |
char[] chars = new char[size];
|
|
1218 |
buffer.get(chars, 0, size);
|
|
1219 |
|
|
1220 |
return translateTransferableString(
|
|
1221 |
new String(chars),
|
|
1222 |
format);
|
|
1223 |
|
|
1224 |
// Source data is a char array. Convert to a String and recur.
|
|
1225 |
} else if (charArrayClass.equals(flavor.getRepresentationClass())) {
|
|
1226 |
if (!(isFlavorCharsetTextType(flavor) && isTextFormat(format))) {
|
|
1227 |
throw new IOException
|
|
1228 |
("cannot transfer non-text data as char array");
|
|
1229 |
}
|
|
1230 |
|
|
1231 |
return translateTransferableString(
|
|
1232 |
new String((char[])obj),
|
|
1233 |
format);
|
|
1234 |
|
|
1235 |
// Source data is a ByteBuffer. For arbitrary flavors, simply return
|
|
1236 |
// the array. For text flavors, decode back to a String and recur to
|
|
1237 |
// reencode according to the requested format.
|
|
1238 |
} else if (flavor.isRepresentationClassByteBuffer()) {
|
|
1239 |
ByteBuffer buffer = (ByteBuffer)obj;
|
|
1240 |
int size = buffer.remaining();
|
|
1241 |
byte[] bytes = new byte[size];
|
|
1242 |
buffer.get(bytes, 0, size);
|
|
1243 |
|
|
1244 |
if (isFlavorCharsetTextType(flavor) && isTextFormat(format)) {
|
|
1245 |
String sourceEncoding = DataTransferer.getTextCharset(flavor);
|
|
1246 |
return translateTransferableString(
|
|
1247 |
new String(bytes, sourceEncoding),
|
|
1248 |
format);
|
|
1249 |
} else {
|
|
1250 |
return bytes;
|
|
1251 |
}
|
|
1252 |
|
|
1253 |
// Source data is a byte array. For arbitrary flavors, simply return
|
|
1254 |
// the array. For text flavors, decode back to a String and recur to
|
|
1255 |
// reencode according to the requested format.
|
|
1256 |
} else if (byteArrayClass.equals(flavor.getRepresentationClass())) {
|
|
1257 |
byte[] bytes = (byte[])obj;
|
|
1258 |
|
|
1259 |
if (isFlavorCharsetTextType(flavor) && isTextFormat(format)) {
|
|
1260 |
String sourceEncoding = DataTransferer.getTextCharset(flavor);
|
|
1261 |
return translateTransferableString(
|
|
1262 |
new String(bytes, sourceEncoding),
|
|
1263 |
format);
|
|
1264 |
} else {
|
|
1265 |
return bytes;
|
|
1266 |
}
|
|
1267 |
// Source data is Image
|
|
1268 |
} else if (DataFlavor.imageFlavor.equals(flavor)) {
|
|
1269 |
if (!isImageFormat(format)) {
|
|
1270 |
throw new IOException("Data translation failed: " +
|
|
1271 |
"not an image format");
|
|
1272 |
}
|
|
1273 |
|
|
1274 |
Image image = (Image)obj;
|
|
1275 |
byte[] bytes = imageToPlatformBytes(image, format);
|
|
1276 |
|
|
1277 |
if (bytes == null) {
|
|
1278 |
throw new IOException("Data translation failed: " +
|
|
1279 |
"cannot convert java image to native format");
|
|
1280 |
}
|
|
1281 |
return bytes;
|
|
1282 |
}
|
|
1283 |
|
|
1284 |
ByteArrayOutputStream bos = new ByteArrayOutputStream();
|
|
1285 |
|
|
1286 |
// Target data is a file list. Source data must be a
|
|
1287 |
// java.util.List which contains java.io.File or String instances.
|
|
1288 |
if (isFileFormat(format)) {
|
|
1289 |
if (!DataFlavor.javaFileListFlavor.equals(flavor)) {
|
|
1290 |
throw new IOException("data translation failed");
|
|
1291 |
}
|
|
1292 |
final List list = (List)obj;
|
|
1293 |
int nFiles = 0;
|
|
1294 |
for (int i = 0; i < list.size(); i++) {
|
|
1295 |
Object o = list.get(i);
|
|
1296 |
if (o instanceof File || o instanceof String) {
|
|
1297 |
nFiles++;
|
|
1298 |
}
|
|
1299 |
}
|
|
1300 |
final String[] files = new String[nFiles];
|
|
1301 |
|
|
1302 |
try {
|
|
1303 |
AccessController.doPrivileged(new PrivilegedExceptionAction() {
|
|
1304 |
public Object run() throws IOException {
|
|
1305 |
for (int i = 0, j = 0; i < list.size(); i++) {
|
|
1306 |
Object o = list.get(i);
|
|
1307 |
if (o instanceof File) {
|
|
1308 |
files[j++] = ((File)o).getCanonicalPath();
|
|
1309 |
} else if (o instanceof String) {
|
|
1310 |
files[j++] = (String)o;
|
|
1311 |
}
|
|
1312 |
}
|
|
1313 |
return null;
|
|
1314 |
}
|
|
1315 |
});
|
|
1316 |
} catch (PrivilegedActionException pae) {
|
|
1317 |
throw new IOException(pae.getMessage());
|
|
1318 |
}
|
|
1319 |
|
|
1320 |
for (int i = 0; i < files.length; i++) {
|
|
1321 |
byte[] bytes = files[i].getBytes();
|
|
1322 |
if (i != 0) bos.write(0);
|
|
1323 |
bos.write(bytes, 0, bytes.length);
|
|
1324 |
}
|
|
1325 |
|
|
1326 |
// Source data is an InputStream. For arbitrary flavors, just grab the
|
|
1327 |
// bytes and dump them into a byte array. For text flavors, decode back
|
|
1328 |
// to a String and recur to reencode according to the requested format.
|
|
1329 |
} else if (flavor.isRepresentationClassInputStream()) {
|
|
1330 |
InputStream is = (InputStream)obj;
|
|
1331 |
boolean eof = false;
|
|
1332 |
int avail = is.available();
|
|
1333 |
byte[] tmp = new byte[avail > 8192 ? avail : 8192];
|
|
1334 |
do {
|
|
1335 |
int ret;
|
|
1336 |
if (!(eof = (ret = is.read(tmp, 0, tmp.length)) == -1)) {
|
|
1337 |
bos.write(tmp, 0, ret);
|
|
1338 |
}
|
|
1339 |
} while (!eof);
|
|
1340 |
is.close();
|
|
1341 |
|
|
1342 |
if (isFlavorCharsetTextType(flavor) && isTextFormat(format)) {
|
|
1343 |
byte[] bytes = bos.toByteArray();
|
|
1344 |
bos.close();
|
|
1345 |
String sourceEncoding = DataTransferer.getTextCharset(flavor);
|
|
1346 |
return translateTransferableString(
|
|
1347 |
new String(bytes, sourceEncoding),
|
|
1348 |
format);
|
|
1349 |
}
|
|
1350 |
|
|
1351 |
// Source data is an RMI object
|
|
1352 |
} else if (flavor.isRepresentationClassRemote()) {
|
|
1353 |
MarshalledObject mo = new MarshalledObject(obj);
|
|
1354 |
ObjectOutputStream oos = new ObjectOutputStream(bos);
|
|
1355 |
oos.writeObject(mo);
|
|
1356 |
oos.close();
|
|
1357 |
|
|
1358 |
// Source data is Serializable
|
|
1359 |
} else if (flavor.isRepresentationClassSerializable()) {
|
|
1360 |
ObjectOutputStream oos = new ObjectOutputStream(bos);
|
|
1361 |
oos.writeObject(obj);
|
|
1362 |
oos.close();
|
|
1363 |
|
|
1364 |
} else {
|
|
1365 |
throw new IOException("data translation failed");
|
|
1366 |
}
|
|
1367 |
|
|
1368 |
byte[] ret = bos.toByteArray();
|
|
1369 |
bos.close();
|
|
1370 |
return ret;
|
|
1371 |
}
|
|
1372 |
|
|
1373 |
public Object translateBytes(byte[] bytes, DataFlavor flavor,
|
|
1374 |
long format, Transferable localeTransferable)
|
|
1375 |
throws IOException
|
|
1376 |
{
|
|
1377 |
return translateBytesOrStream(null, bytes, flavor, format,
|
|
1378 |
localeTransferable);
|
|
1379 |
}
|
|
1380 |
|
|
1381 |
public Object translateStream(InputStream str, DataFlavor flavor,
|
|
1382 |
long format, Transferable localeTransferable)
|
|
1383 |
throws IOException
|
|
1384 |
{
|
|
1385 |
return translateBytesOrStream(str, null, flavor, format,
|
|
1386 |
localeTransferable);
|
|
1387 |
}
|
|
1388 |
|
|
1389 |
|
|
1390 |
/**
|
|
1391 |
* Primary translation function for translating either a byte array or
|
|
1392 |
* an InputStream into an Object, given a source format and a target
|
|
1393 |
* DataFlavor.
|
|
1394 |
*
|
|
1395 |
* One of str/bytes is non-null; the other is null.
|
|
1396 |
* The conversion from byte[] to InputStream is cheap, so do that
|
|
1397 |
* immediately if necessary. The opposite conversion is expensive,
|
|
1398 |
* so avoid it if possible.
|
|
1399 |
*/
|
|
1400 |
protected Object translateBytesOrStream(InputStream str, byte[] bytes,
|
|
1401 |
DataFlavor flavor, long format,
|
|
1402 |
Transferable localeTransferable)
|
|
1403 |
throws IOException
|
|
1404 |
{
|
|
1405 |
|
|
1406 |
if (str == null) {
|
|
1407 |
str = new ByteArrayInputStream(bytes);
|
|
1408 |
}
|
|
1409 |
|
|
1410 |
// Source data is a file list. Use the dragQueryFile native function to
|
|
1411 |
// do most of the decoding. Then wrap File objects around the String
|
|
1412 |
// filenames and return a List.
|
|
1413 |
if (isFileFormat(format)) {
|
|
1414 |
if (!DataFlavor.javaFileListFlavor.equals(flavor)) {
|
|
1415 |
throw new IOException("data translation failed");
|
|
1416 |
}
|
|
1417 |
if (bytes == null) {
|
|
1418 |
bytes = inputStreamToByteArray(str);
|
|
1419 |
}
|
|
1420 |
String[] filenames = dragQueryFile(bytes);
|
|
1421 |
if (filenames == null) {
|
|
1422 |
str.close();
|
|
1423 |
return null;
|
|
1424 |
}
|
|
1425 |
|
|
1426 |
// Convert the strings to File objects
|
|
1427 |
File[] files = new File[filenames.length];
|
|
1428 |
for (int i = 0; i < filenames.length; i++) {
|
|
1429 |
files[i] = new File(filenames[i]);
|
|
1430 |
}
|
|
1431 |
str.close();
|
|
1432 |
|
|
1433 |
// Turn the list of Files into a List and return
|
|
1434 |
return Arrays.asList(files);
|
|
1435 |
|
|
1436 |
// Target data is a String. Strip terminating NUL bytes. Decode bytes
|
|
1437 |
// into characters. Search-and-replace EOLN.
|
|
1438 |
} else if (String.class.equals(flavor.getRepresentationClass()) &&
|
|
1439 |
isFlavorCharsetTextType(flavor) && isTextFormat(format)) {
|
|
1440 |
|
|
1441 |
return translateBytesOrStreamToString(
|
|
1442 |
str, bytes,
|
|
1443 |
format, localeTransferable);
|
|
1444 |
|
|
1445 |
// Special hack to maintain backwards-compatibility with the brokenness
|
|
1446 |
// of StringSelection. Return a StringReader instead of an InputStream.
|
|
1447 |
// Recur to obtain String and encapsulate.
|
|
1448 |
} else if (DataFlavor.plainTextFlavor.equals(flavor)) {
|
|
1449 |
return new StringReader(translateBytesOrStreamToString(
|
|
1450 |
str, bytes,
|
|
1451 |
format, localeTransferable));
|
|
1452 |
|
|
1453 |
// Target data is an InputStream. For arbitrary flavors, just return
|
|
1454 |
// the raw bytes. For text flavors, decode to strip terminators and
|
|
1455 |
// search-and-replace EOLN, then reencode according to the requested
|
|
1456 |
// flavor.
|
|
1457 |
} else if (flavor.isRepresentationClassInputStream()) {
|
|
1458 |
return translateBytesOrStreamToInputStream(str, flavor, format,
|
|
1459 |
localeTransferable);
|
|
1460 |
|
|
1461 |
// Target data is a Reader. Obtain data in InputStream format, encoded
|
|
1462 |
// as "Unicode" (utf-16be). Then use an InputStreamReader to decode
|
|
1463 |
// back to chars on demand.
|
|
1464 |
} else if (flavor.isRepresentationClassReader()) {
|
|
1465 |
if (!(isFlavorCharsetTextType(flavor) && isTextFormat(format))) {
|
|
1466 |
throw new IOException
|
|
1467 |
("cannot transfer non-text data as Reader");
|
|
1468 |
}
|
|
1469 |
|
|
1470 |
InputStream is = (InputStream)
|
|
1471 |
translateBytesOrStreamToInputStream
|
|
1472 |
(str, DataFlavor.plainTextFlavor, format,
|
|
1473 |
localeTransferable);
|
|
1474 |
String unicode =
|
|
1475 |
DataTransferer.getTextCharset(DataFlavor.plainTextFlavor);
|
|
1476 |
Reader reader = new InputStreamReader(is, unicode);
|
|
1477 |
|
|
1478 |
return constructFlavoredObject(reader, flavor, Reader.class);
|
|
1479 |
|
|
1480 |
// Target data is a CharBuffer. Recur to obtain String and wrap.
|
|
1481 |
} else if (flavor.isRepresentationClassCharBuffer()) {
|
|
1482 |
if (!(isFlavorCharsetTextType(flavor) && isTextFormat(format))) {
|
|
1483 |
throw new IOException
|
|
1484 |
("cannot transfer non-text data as CharBuffer");
|
|
1485 |
}
|
|
1486 |
|
|
1487 |
CharBuffer buffer = CharBuffer.wrap(translateBytesOrStreamToString(
|
|
1488 |
str, bytes,
|
|
1489 |
format, localeTransferable));
|
|
1490 |
|
|
1491 |
return constructFlavoredObject(buffer, flavor, CharBuffer.class);
|
|
1492 |
|
|
1493 |
// Target data is a char array. Recur to obtain String and convert to
|
|
1494 |
// char array.
|
|
1495 |
} else if (charArrayClass.equals(flavor.getRepresentationClass())) {
|
|
1496 |
if (!(isFlavorCharsetTextType(flavor) && isTextFormat(format))) {
|
|
1497 |
throw new IOException
|
|
1498 |
("cannot transfer non-text data as char array");
|
|
1499 |
}
|
|
1500 |
|
|
1501 |
return translateBytesOrStreamToString(
|
|
1502 |
str, bytes,
|
|
1503 |
format, localeTransferable).toCharArray();
|
|
1504 |
|
|
1505 |
// Target data is a ByteBuffer. For arbitrary flavors, just return
|
|
1506 |
// the raw bytes. For text flavors, convert to a String to strip
|
|
1507 |
// terminators and search-and-replace EOLN, then reencode according to
|
|
1508 |
// the requested flavor.
|
|
1509 |
} else if (flavor.isRepresentationClassByteBuffer()) {
|
|
1510 |
if (isFlavorCharsetTextType(flavor) && isTextFormat(format)) {
|
|
1511 |
bytes = translateBytesOrStreamToString(
|
|
1512 |
str, bytes,
|
|
1513 |
format, localeTransferable
|
|
1514 |
).getBytes(
|
|
1515 |
DataTransferer.getTextCharset(flavor)
|
|
1516 |
);
|
|
1517 |
} else {
|
|
1518 |
if (bytes == null) {
|
|
1519 |
bytes = inputStreamToByteArray(str);
|
|
1520 |
}
|
|
1521 |
}
|
|
1522 |
|
|
1523 |
ByteBuffer buffer = ByteBuffer.wrap(bytes);
|
|
1524 |
return constructFlavoredObject(buffer, flavor, ByteBuffer.class);
|
|
1525 |
|
|
1526 |
// Target data is a byte array. For arbitrary flavors, just return
|
|
1527 |
// the raw bytes. For text flavors, convert to a String to strip
|
|
1528 |
// terminators and search-and-replace EOLN, then reencode according to
|
|
1529 |
// the requested flavor.
|
|
1530 |
} else if (byteArrayClass.equals(flavor.getRepresentationClass())) {
|
|
1531 |
if (isFlavorCharsetTextType(flavor) && isTextFormat(format)) {
|
|
1532 |
return translateBytesOrStreamToString(
|
|
1533 |
str, bytes,
|
|
1534 |
format, localeTransferable
|
|
1535 |
).getBytes(
|
|
1536 |
DataTransferer.getTextCharset(flavor)
|
|
1537 |
);
|
|
1538 |
} else {
|
|
1539 |
return (bytes != null) ? bytes : inputStreamToByteArray(str);
|
|
1540 |
}
|
|
1541 |
|
|
1542 |
// Target data is an RMI object
|
|
1543 |
} else if (flavor.isRepresentationClassRemote()) {
|
|
1544 |
try {
|
|
1545 |
byte[] ba = inputStreamToByteArray(str);
|
|
1546 |
ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(ba));
|
|
1547 |
Object ret = ((MarshalledObject)(ois.readObject())).get();
|
|
1548 |
ois.close();
|
|
1549 |
str.close();
|
|
1550 |
return ret;
|
|
1551 |
} catch (Exception e) {
|
|
1552 |
throw new IOException(e.getMessage());
|
|
1553 |
}
|
|
1554 |
|
|
1555 |
// Target data is Serializable
|
|
1556 |
} else if (flavor.isRepresentationClassSerializable()) {
|
|
1557 |
try {
|
|
1558 |
byte[] ba = inputStreamToByteArray(str);
|
|
1559 |
ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(ba));
|
|
1560 |
Object ret = ois.readObject();
|
|
1561 |
ois.close();
|
|
1562 |
str.close();
|
|
1563 |
return ret;
|
|
1564 |
} catch (Exception e) {
|
|
1565 |
throw new IOException(e.getMessage());
|
|
1566 |
}
|
|
1567 |
|
|
1568 |
// Target data is Image
|
|
1569 |
} else if (DataFlavor.imageFlavor.equals(flavor)) {
|
|
1570 |
if (!isImageFormat(format)) {
|
|
1571 |
throw new IOException("data translation failed");
|
|
1572 |
}
|
|
1573 |
|
|
1574 |
Image image = platformImageBytesOrStreamToImage(str, bytes, format);
|
|
1575 |
str.close();
|
|
1576 |
return image;
|
|
1577 |
}
|
|
1578 |
|
|
1579 |
throw new IOException("data translation failed");
|
|
1580 |
}
|
|
1581 |
|
|
1582 |
/**
|
|
1583 |
* For arbitrary flavors, just use the raw InputStream. For text flavors,
|
|
1584 |
* ReencodingInputStream will decode and reencode the InputStream on demand
|
|
1585 |
* so that we can strip terminators and search-and-replace EOLN.
|
|
1586 |
*/
|
|
1587 |
private Object translateBytesOrStreamToInputStream
|
|
1588 |
(InputStream str, DataFlavor flavor, long format,
|
|
1589 |
Transferable localeTransferable) throws IOException
|
|
1590 |
{
|
|
1591 |
if (isFlavorCharsetTextType(flavor) && isTextFormat(format)) {
|
|
1592 |
str = new ReencodingInputStream
|
|
1593 |
(str, format, DataTransferer.getTextCharset(flavor),
|
|
1594 |
localeTransferable);
|
|
1595 |
}
|
|
1596 |
|
|
1597 |
return constructFlavoredObject(str, flavor, InputStream.class);
|
|
1598 |
}
|
|
1599 |
|
|
1600 |
/**
|
|
1601 |
* We support representations which are exactly of the specified Class,
|
|
1602 |
* and also arbitrary Objects which have a constructor which takes an
|
|
1603 |
* instance of the Class as its sole parameter.
|
|
1604 |
*/
|
|
1605 |
private Object constructFlavoredObject(Object arg, DataFlavor flavor,
|
|
1606 |
Class clazz)
|
|
1607 |
throws IOException
|
|
1608 |
{
|
|
1609 |
final Class dfrc = flavor.getRepresentationClass();
|
|
1610 |
|
|
1611 |
if (clazz.equals(dfrc)) {
|
|
1612 |
return arg; // simple case
|
|
1613 |
} else {
|
|
1614 |
Constructor[] constructors = null;
|
|
1615 |
|
|
1616 |
try {
|
|
1617 |
constructors = (Constructor[])
|
|
1618 |
AccessController.doPrivileged(new PrivilegedAction() {
|
|
1619 |
public Object run() {
|
|
1620 |
return dfrc.getConstructors();
|
|
1621 |
}
|
|
1622 |
});
|
|
1623 |
} catch (SecurityException se) {
|
|
1624 |
throw new IOException(se.getMessage());
|
|
1625 |
}
|
|
1626 |
|
|
1627 |
Constructor constructor = null;
|
|
1628 |
|
|
1629 |
for (int j = 0; j < constructors.length; j++) {
|
|
1630 |
if (!Modifier.isPublic(constructors[j].getModifiers())) {
|
|
1631 |
continue;
|
|
1632 |
}
|
|
1633 |
|
|
1634 |
Class[] ptypes = constructors[j].getParameterTypes();
|
|
1635 |
|
|
1636 |
if (ptypes != null && ptypes.length == 1 &&
|
|
1637 |
clazz.equals(ptypes[0])) {
|
|
1638 |
constructor = constructors[j];
|
|
1639 |
break;
|
|
1640 |
}
|
|
1641 |
}
|
|
1642 |
|
|
1643 |
if (constructor == null) {
|
|
1644 |
throw new IOException("can't find <init>(L"+ clazz +
|
|
1645 |
";)V for class: " + dfrc.getName());
|
|
1646 |
}
|
|
1647 |
|
|
1648 |
try {
|
|
1649 |
return constructor.newInstance(new Object[] { arg } );
|
|
1650 |
} catch (Exception e) {
|
|
1651 |
throw new IOException(e.getMessage());
|
|
1652 |
}
|
|
1653 |
}
|
|
1654 |
}
|
|
1655 |
|
|
1656 |
/**
|
|
1657 |
* Used for decoding and reencoding an InputStream on demand so that we
|
|
1658 |
* can strip NUL terminators and perform EOLN search-and-replace.
|
|
1659 |
*/
|
|
1660 |
public class ReencodingInputStream extends InputStream {
|
|
1661 |
protected BufferedReader wrapped;
|
|
1662 |
protected final char[] in = new char[1];
|
|
1663 |
protected byte[] out;
|
|
1664 |
|
|
1665 |
protected CharsetEncoder encoder;
|
|
1666 |
protected CharBuffer inBuf;
|
|
1667 |
protected ByteBuffer outBuf;
|
|
1668 |
|
|
1669 |
protected char[] eoln;
|
|
1670 |
protected int numTerminators;
|
|
1671 |
|
|
1672 |
protected boolean eos;
|
|
1673 |
protected int index, limit;
|
|
1674 |
|
|
1675 |
public ReencodingInputStream(InputStream bytestream, long format,
|
|
1676 |
String targetEncoding,
|
|
1677 |
Transferable localeTransferable)
|
|
1678 |
throws IOException
|
|
1679 |
{
|
|
1680 |
Long lFormat = Long.valueOf(format);
|
|
1681 |
|
|
1682 |
String sourceEncoding = null;
|
|
1683 |
if (isLocaleDependentTextFormat(format) &&
|
|
1684 |
localeTransferable != null &&
|
|
1685 |
localeTransferable.
|
|
1686 |
isDataFlavorSupported(javaTextEncodingFlavor))
|
|
1687 |
{
|
|
1688 |
try {
|
|
1689 |
sourceEncoding = new String((byte[])localeTransferable.
|
|
1690 |
getTransferData(javaTextEncodingFlavor),
|
|
1691 |
"UTF-8");
|
|
1692 |
} catch (UnsupportedFlavorException cannotHappen) {
|
|
1693 |
}
|
|
1694 |
} else {
|
|
1695 |
sourceEncoding = getCharsetForTextFormat(lFormat);
|
|
1696 |
}
|
|
1697 |
|
|
1698 |
if (sourceEncoding == null) {
|
|
1699 |
// Only happens when we have a custom text type.
|
|
1700 |
sourceEncoding = getDefaultTextCharset();
|
|
1701 |
}
|
|
1702 |
wrapped = new BufferedReader
|
|
1703 |
(new InputStreamReader(bytestream, sourceEncoding));
|
|
1704 |
|
|
1705 |
if (targetEncoding == null) {
|
|
1706 |
// Throw NullPointerException for compatibility with the former
|
|
1707 |
// call to sun.io.CharToByteConverter.getConverter(null)
|
|
1708 |
// (Charset.forName(null) throws unspecified IllegalArgumentException
|
|
1709 |
// now; see 6228568)
|
|
1710 |
throw new NullPointerException("null target encoding");
|
|
1711 |
}
|
|
1712 |
|
|
1713 |
try {
|
|
1714 |
encoder = Charset.forName(targetEncoding).newEncoder();
|
|
1715 |
out = new byte[(int)(encoder.maxBytesPerChar() + 0.5)];
|
|
1716 |
inBuf = CharBuffer.wrap(in);
|
|
1717 |
outBuf = ByteBuffer.wrap(out);
|
|
1718 |
} catch (IllegalCharsetNameException e) {
|
|
1719 |
throw new IOException(e.toString());
|
|
1720 |
} catch (UnsupportedCharsetException e) {
|
|
1721 |
throw new IOException(e.toString());
|
|
1722 |
} catch (UnsupportedOperationException e) {
|
|
1723 |
throw new IOException(e.toString());
|
|
1724 |
}
|
|
1725 |
|
|
1726 |
String sEoln = (String)nativeEOLNs.get(lFormat);
|
|
1727 |
if (sEoln != null) {
|
|
1728 |
eoln = sEoln.toCharArray();
|
|
1729 |
}
|
|
1730 |
|
|
1731 |
// A hope and a prayer that this works generically. This will
|
|
1732 |
// definitely work on Win32.
|
|
1733 |
Integer terminators = (Integer)nativeTerminators.get(lFormat);
|
|
1734 |
if (terminators != null) {
|
|
1735 |
numTerminators = terminators.intValue();
|
|
1736 |
}
|
|
1737 |
}
|
|
1738 |
|
|
1739 |
public int read() throws IOException {
|
|
1740 |
if (eos) {
|
|
1741 |
return -1;
|
|
1742 |
}
|
|
1743 |
|
|
1744 |
if (index >= limit) {
|
|
1745 |
int c = wrapped.read();
|
|
1746 |
|
|
1747 |
if (c == -1) { // -1 is EOS
|
|
1748 |
eos = true;
|
|
1749 |
return -1;
|
|
1750 |
}
|
|
1751 |
|
|
1752 |
// "c == 0" is not quite correct, but good enough on Windows.
|
|
1753 |
if (numTerminators > 0 && c == 0) {
|
|
1754 |
eos = true;
|
|
1755 |
return -1;
|
|
1756 |
} else if (eoln != null && matchCharArray(eoln, c)) {
|
|
1757 |
c = '\n' & 0xFFFF;
|
|
1758 |
}
|
|
1759 |
|
|
1760 |
in[0] = (char)c;
|
|
1761 |
|
|
1762 |
inBuf.rewind();
|
|
1763 |
outBuf.rewind();
|
|
1764 |
encoder.encode(inBuf, outBuf, false);
|
|
1765 |
outBuf.flip();
|
|
1766 |
limit = outBuf.limit();
|
|
1767 |
|
|
1768 |
index = 0;
|
|
1769 |
|
|
1770 |
return read();
|
|
1771 |
} else {
|
|
1772 |
return out[index++] & 0xFF;
|
|
1773 |
}
|
|
1774 |
}
|
|
1775 |
|
|
1776 |
public int available() throws IOException {
|
|
1777 |
return ((eos) ? 0 : (limit - index));
|
|
1778 |
}
|
|
1779 |
|
|
1780 |
public void close() throws IOException {
|
|
1781 |
wrapped.close();
|
|
1782 |
}
|
|
1783 |
|
|
1784 |
/**
|
|
1785 |
* Checks to see if the next array.length characters in wrapped
|
|
1786 |
* match array. The first character is provided as c. Subsequent
|
|
1787 |
* characters are read from wrapped itself. When this method returns,
|
|
1788 |
* the wrapped index may be different from what it was when this
|
|
1789 |
* method was called.
|
|
1790 |
*/
|
|
1791 |
private boolean matchCharArray(char[] array, int c)
|
|
1792 |
throws IOException
|
|
1793 |
{
|
|
1794 |
wrapped.mark(array.length); // BufferedReader supports mark
|
|
1795 |
|
|
1796 |
int count = 0;
|
|
1797 |
if ((char)c == array[0]) {
|
|
1798 |
for (count = 1; count < array.length; count++) {
|
|
1799 |
c = wrapped.read();
|
|
1800 |
if (c == -1 || ((char)c) != array[count]) {
|
|
1801 |
break;
|
|
1802 |
}
|
|
1803 |
}
|
|
1804 |
}
|
|
1805 |
|
|
1806 |
if (count == array.length) {
|
|
1807 |
return true;
|
|
1808 |
} else {
|
|
1809 |
wrapped.reset();
|
|
1810 |
return false;
|
|
1811 |
}
|
|
1812 |
}
|
|
1813 |
}
|
|
1814 |
|
|
1815 |
/**
|
|
1816 |
* Decodes a byte array into a set of String filenames.
|
|
1817 |
*/
|
|
1818 |
protected abstract String[] dragQueryFile(byte[] bytes);
|
|
1819 |
|
|
1820 |
/**
|
|
1821 |
* Translates either a byte array or an input stream which contain
|
|
1822 |
* platform-specific image data in the given format into an Image.
|
|
1823 |
*/
|
|
1824 |
protected abstract Image platformImageBytesOrStreamToImage(InputStream str,
|
|
1825 |
byte[] bytes,
|
|
1826 |
long format)
|
|
1827 |
throws IOException;
|
|
1828 |
|
|
1829 |
/**
|
|
1830 |
* Translates either a byte array or an input stream which contain
|
|
1831 |
* an image data in the given standard format into an Image.
|
|
1832 |
*
|
|
1833 |
* @param mimeType image MIME type, such as: image/png, image/jpeg, image/gif
|
|
1834 |
*/
|
|
1835 |
protected Image standardImageBytesOrStreamToImage(InputStream inputStream,
|
|
1836 |
byte[] bytes,
|
|
1837 |
String mimeType)
|
|
1838 |
throws IOException {
|
|
1839 |
if (inputStream == null) {
|
|
1840 |
inputStream = new ByteArrayInputStream(bytes);
|
|
1841 |
}
|
|
1842 |
|
|
1843 |
Iterator readerIterator = ImageIO.getImageReadersByMIMEType(mimeType);
|
|
1844 |
|
|
1845 |
if (!readerIterator.hasNext()) {
|
|
1846 |
throw new IOException("No registered service provider can decode " +
|
|
1847 |
" an image from " + mimeType);
|
|
1848 |
}
|
|
1849 |
|
|
1850 |
IOException ioe = null;
|
|
1851 |
|
|
1852 |
while (readerIterator.hasNext()) {
|
|
1853 |
ImageReader imageReader = (ImageReader)readerIterator.next();
|
|
1854 |
try {
|
|
1855 |
ImageInputStream imageInputStream =
|
|
1856 |
ImageIO.createImageInputStream(inputStream);
|
|
1857 |
|
|
1858 |
try {
|
|
1859 |
ImageReadParam param = imageReader.getDefaultReadParam();
|
|
1860 |
imageReader.setInput(imageInputStream, true, true);
|
|
1861 |
BufferedImage bufferedImage =
|
|
1862 |
imageReader.read(imageReader.getMinIndex(), param);
|
|
1863 |
if (bufferedImage != null) {
|
|
1864 |
return bufferedImage;
|
|
1865 |
}
|
|
1866 |
} finally {
|
|
1867 |
imageInputStream.close();
|
|
1868 |
imageReader.dispose();
|
|
1869 |
}
|
|
1870 |
} catch (IOException e) {
|
|
1871 |
ioe = e;
|
|
1872 |
continue;
|
|
1873 |
}
|
|
1874 |
}
|
|
1875 |
|
|
1876 |
if (ioe == null) {
|
|
1877 |
ioe = new IOException("Registered service providers failed to decode"
|
|
1878 |
+ " an image from " + mimeType);
|
|
1879 |
}
|
|
1880 |
|
|
1881 |
throw ioe;
|
|
1882 |
}
|
|
1883 |
|
|
1884 |
/**
|
|
1885 |
* Translates a Java Image into a byte array which contains platform-
|
|
1886 |
* specific image data in the given format.
|
|
1887 |
*/
|
|
1888 |
protected abstract byte[] imageToPlatformBytes(Image image, long format)
|
|
1889 |
throws IOException;
|
|
1890 |
|
|
1891 |
/**
|
|
1892 |
* Translates a Java Image into a byte array which contains
|
|
1893 |
* an image data in the given standard format.
|
|
1894 |
*
|
|
1895 |
* @param mimeType image MIME type, such as: image/png, image/jpeg
|
|
1896 |
*/
|
|
1897 |
protected byte[] imageToStandardBytes(Image image, String mimeType)
|
|
1898 |
throws IOException {
|
|
1899 |
IOException originalIOE = null;
|
|
1900 |
|
|
1901 |
Iterator writerIterator = ImageIO.getImageWritersByMIMEType(mimeType);
|
|
1902 |
|
|
1903 |
if (!writerIterator.hasNext()) {
|
|
1904 |
throw new IOException("No registered service provider can encode " +
|
|
1905 |
" an image to " + mimeType);
|
|
1906 |
}
|
|
1907 |
|
|
1908 |
if (image instanceof RenderedImage) {
|
|
1909 |
// Try to encode the original image.
|
|
1910 |
try {
|
|
1911 |
return imageToStandardBytesImpl((RenderedImage)image, mimeType);
|
|
1912 |
} catch (IOException ioe) {
|
|
1913 |
originalIOE = ioe;
|
|
1914 |
}
|
|
1915 |
}
|
|
1916 |
|
|
1917 |
// Retry with a BufferedImage.
|
|
1918 |
int width = 0;
|
|
1919 |
int height = 0;
|
|
1920 |
if (image instanceof ToolkitImage) {
|
|
1921 |
ImageRepresentation ir = ((ToolkitImage)image).getImageRep();
|
|
1922 |
ir.reconstruct(ImageObserver.ALLBITS);
|
|
1923 |
width = ir.getWidth();
|
|
1924 |
height = ir.getHeight();
|
|
1925 |
} else {
|
|
1926 |
width = image.getWidth(null);
|
|
1927 |
height = image.getHeight(null);
|
|
1928 |
}
|
|
1929 |
|
|
1930 |
ColorModel model = ColorModel.getRGBdefault();
|
|
1931 |
WritableRaster raster =
|
|
1932 |
model.createCompatibleWritableRaster(width, height);
|
|
1933 |
|
|
1934 |
BufferedImage bufferedImage =
|
|
1935 |
new BufferedImage(model, raster, model.isAlphaPremultiplied(),
|
|
1936 |
null);
|
|
1937 |
|
|
1938 |
Graphics g = bufferedImage.getGraphics();
|
|
1939 |
try {
|
|
1940 |
g.drawImage(image, 0, 0, width, height, null);
|
|
1941 |
} finally {
|
|
1942 |
g.dispose();
|
|
1943 |
}
|
|
1944 |
|
|
1945 |
try {
|
|
1946 |
return imageToStandardBytesImpl(bufferedImage, mimeType);
|
|
1947 |
} catch (IOException ioe) {
|
|
1948 |
if (originalIOE != null) {
|
|
1949 |
throw originalIOE;
|
|
1950 |
} else {
|
|
1951 |
throw ioe;
|
|
1952 |
}
|
|
1953 |
}
|
|
1954 |
}
|
|
1955 |
|
|
1956 |
protected byte[] imageToStandardBytesImpl(RenderedImage renderedImage,
|
|
1957 |
String mimeType)
|
|
1958 |
throws IOException {
|
|
1959 |
|
|
1960 |
Iterator writerIterator = ImageIO.getImageWritersByMIMEType(mimeType);
|
|
1961 |
|
|
1962 |
ImageTypeSpecifier typeSpecifier =
|
|
1963 |
new ImageTypeSpecifier(renderedImage);
|
|
1964 |
|
|
1965 |
ByteArrayOutputStream baos = new ByteArrayOutputStream();
|
|
1966 |
IOException ioe = null;
|
|
1967 |
|
|
1968 |
while (writerIterator.hasNext()) {
|
|
1969 |
ImageWriter imageWriter = (ImageWriter)writerIterator.next();
|
|
1970 |
ImageWriterSpi writerSpi = imageWriter.getOriginatingProvider();
|
|
1971 |
|
|
1972 |
if (!writerSpi.canEncodeImage(typeSpecifier)) {
|
|
1973 |
continue;
|
|
1974 |
}
|
|
1975 |
|
|
1976 |
try {
|
|
1977 |
ImageOutputStream imageOutputStream =
|
|
1978 |
ImageIO.createImageOutputStream(baos);
|
|
1979 |
try {
|
|
1980 |
imageWriter.setOutput(imageOutputStream);
|
|
1981 |
imageWriter.write(renderedImage);
|
|
1982 |
imageOutputStream.flush();
|
|
1983 |
} finally {
|
|
1984 |
imageOutputStream.close();
|
|
1985 |
}
|
|
1986 |
} catch (IOException e) {
|
|
1987 |
imageWriter.dispose();
|
|
1988 |
baos.reset();
|
|
1989 |
ioe = e;
|
|
1990 |
continue;
|
|
1991 |
}
|
|
1992 |
|
|
1993 |
imageWriter.dispose();
|
|
1994 |
baos.close();
|
|
1995 |
return baos.toByteArray();
|
|
1996 |
}
|
|
1997 |
|
|
1998 |
baos.close();
|
|
1999 |
|
|
2000 |
if (ioe == null) {
|
|
2001 |
ioe = new IOException("Registered service providers failed to encode "
|
|
2002 |
+ renderedImage + " to " + mimeType);
|
|
2003 |
}
|
|
2004 |
|
|
2005 |
throw ioe;
|
|
2006 |
}
|
|
2007 |
|
|
2008 |
/**
|
|
2009 |
* Concatenates the data represented by two objects. Objects can be either
|
|
2010 |
* byte arrays or instances of <code>InputStream</code>. If both arguments
|
|
2011 |
* are byte arrays byte array will be returned. Otherwise an
|
|
2012 |
* <code>InputStream</code> will be returned.
|
|
2013 |
* <p>
|
|
2014 |
* Currently is only called from native code to prepend palette data to
|
|
2015 |
* platform-specific image data during image transfer on Win32.
|
|
2016 |
*
|
|
2017 |
* @param obj1 the first object to be concatenated.
|
|
2018 |
* @param obj2 the second object to be concatenated.
|
|
2019 |
* @return a byte array or an <code>InputStream</code> which represents
|
|
2020 |
* a logical concatenation of the two arguments.
|
|
2021 |
* @throws NullPointerException is either of the arguments is
|
|
2022 |
* <code>null</code>
|
|
2023 |
* @throws ClassCastException is either of the arguments is
|
|
2024 |
* neither byte array nor an instance of <code>InputStream</code>.
|
|
2025 |
*/
|
|
2026 |
private Object concatData(Object obj1, Object obj2) {
|
|
2027 |
InputStream str1 = null;
|
|
2028 |
InputStream str2 = null;
|
|
2029 |
|
|
2030 |
if (obj1 instanceof byte[]) {
|
|
2031 |
byte[] arr1 = (byte[])obj1;
|
|
2032 |
if (obj2 instanceof byte[]) {
|
|
2033 |
byte[] arr2 = (byte[])obj2;
|
|
2034 |
byte[] ret = new byte[arr1.length + arr2.length];
|
|
2035 |
System.arraycopy(arr1, 0, ret, 0, arr1.length);
|
|
2036 |
System.arraycopy(arr2, 0, ret, arr1.length, arr2.length);
|
|
2037 |
return ret;
|
|
2038 |
} else {
|
|
2039 |
str1 = new ByteArrayInputStream(arr1);
|
|
2040 |
str2 = (InputStream)obj2;
|
|
2041 |
}
|
|
2042 |
} else {
|
|
2043 |
str1 = (InputStream)obj1;
|
|
2044 |
if (obj2 instanceof byte[]) {
|
|
2045 |
str2 = new ByteArrayInputStream((byte[])obj2);
|
|
2046 |
} else {
|
|
2047 |
str2 = (InputStream)obj2;
|
|
2048 |
}
|
|
2049 |
}
|
|
2050 |
|
|
2051 |
return new SequenceInputStream(str1, str2);
|
|
2052 |
}
|
|
2053 |
|
|
2054 |
public byte[] convertData(final Object source,
|
|
2055 |
final Transferable contents,
|
|
2056 |
final long format,
|
|
2057 |
final Map formatMap,
|
|
2058 |
final boolean isToolkitThread)
|
|
2059 |
throws IOException
|
|
2060 |
{
|
|
2061 |
byte[] ret = null;
|
|
2062 |
|
|
2063 |
/*
|
|
2064 |
* If the current thread is the Toolkit thread we should post a
|
|
2065 |
* Runnable to the event dispatch thread associated with source Object,
|
|
2066 |
* since translateTransferable() calls Transferable.getTransferData()
|
|
2067 |
* that may contain client code.
|
|
2068 |
*/
|
|
2069 |
if (isToolkitThread) try {
|
|
2070 |
final Stack stack = new Stack();
|
|
2071 |
final Runnable dataConverter = new Runnable() {
|
|
2072 |
// Guard against multiple executions.
|
|
2073 |
private boolean done = false;
|
|
2074 |
public void run() {
|
|
2075 |
if (done) {
|
|
2076 |
return;
|
|
2077 |
}
|
|
2078 |
byte[] data = null;
|
|
2079 |
try {
|
|
2080 |
DataFlavor flavor = (DataFlavor)formatMap.get(Long.valueOf(format));
|
|
2081 |
if (flavor != null) {
|
|
2082 |
data = translateTransferable(contents, flavor, format);
|
|
2083 |
}
|
|
2084 |
} catch (Exception e) {
|
|
2085 |
e.printStackTrace();
|
|
2086 |
data = null;
|
|
2087 |
}
|
|
2088 |
try {
|
|
2089 |
getToolkitThreadBlockedHandler().lock();
|
|
2090 |
stack.push(data);
|
|
2091 |
getToolkitThreadBlockedHandler().exit();
|
|
2092 |
} finally {
|
|
2093 |
getToolkitThreadBlockedHandler().unlock();
|
|
2094 |
done = true;
|
|
2095 |
}
|
|
2096 |
}
|
|
2097 |
};
|
|
2098 |
|
|
2099 |
final AppContext appContext = SunToolkit.targetToAppContext(source);
|
|
2100 |
|
|
2101 |
getToolkitThreadBlockedHandler().lock();
|
|
2102 |
|
|
2103 |
if (appContext != null) {
|
|
2104 |
appContext.put(DATA_CONVERTER_KEY, dataConverter);
|
|
2105 |
}
|
|
2106 |
|
|
2107 |
SunToolkit.executeOnEventHandlerThread(source, dataConverter);
|
|
2108 |
|
|
2109 |
while (stack.empty()) {
|
|
2110 |
getToolkitThreadBlockedHandler().enter();
|
|
2111 |
}
|
|
2112 |
|
|
2113 |
if (appContext != null) {
|
|
2114 |
appContext.remove(DATA_CONVERTER_KEY);
|
|
2115 |
}
|
|
2116 |
|
|
2117 |
ret = (byte[])stack.pop();
|
|
2118 |
} finally {
|
|
2119 |
getToolkitThreadBlockedHandler().unlock();
|
|
2120 |
} else {
|
|
2121 |
DataFlavor flavor = (DataFlavor)
|
|
2122 |
formatMap.get(Long.valueOf(format));
|
|
2123 |
if (flavor != null) {
|
|
2124 |
ret = translateTransferable(contents, flavor, format);
|
|
2125 |
}
|
|
2126 |
}
|
|
2127 |
|
|
2128 |
return ret;
|
|
2129 |
}
|
|
2130 |
|
|
2131 |
public void processDataConversionRequests() {
|
|
2132 |
if (EventQueue.isDispatchThread()) {
|
|
2133 |
AppContext appContext = AppContext.getAppContext();
|
|
2134 |
getToolkitThreadBlockedHandler().lock();
|
|
2135 |
try {
|
|
2136 |
Runnable dataConverter =
|
|
2137 |
(Runnable)appContext.get(DATA_CONVERTER_KEY);
|
|
2138 |
if (dataConverter != null) {
|
|
2139 |
dataConverter.run();
|
|
2140 |
appContext.remove(DATA_CONVERTER_KEY);
|
|
2141 |
}
|
|
2142 |
} finally {
|
|
2143 |
getToolkitThreadBlockedHandler().unlock();
|
|
2144 |
}
|
|
2145 |
}
|
|
2146 |
}
|
|
2147 |
|
|
2148 |
public abstract ToolkitThreadBlockedHandler
|
|
2149 |
getToolkitThreadBlockedHandler();
|
|
2150 |
|
|
2151 |
/**
|
|
2152 |
* Helper function to reduce a Map with Long keys to a long array.
|
|
2153 |
* <p>
|
|
2154 |
* The map keys are sorted according to the native formats preference
|
|
2155 |
* order.
|
|
2156 |
*/
|
|
2157 |
public static long[] keysToLongArray(SortedMap map) {
|
|
2158 |
Set keySet = map.keySet();
|
|
2159 |
long[] retval = new long[keySet.size()];
|
|
2160 |
int i = 0;
|
|
2161 |
for (Iterator iter = keySet.iterator(); iter.hasNext(); i++) {
|
|
2162 |
retval[i] = ((Long)iter.next()).longValue();
|
|
2163 |
}
|
|
2164 |
return retval;
|
|
2165 |
}
|
|
2166 |
|
|
2167 |
/**
|
|
2168 |
* Helper function to reduce a Map with DataFlavor keys to a DataFlavor
|
|
2169 |
* array. The array will be sorted according to
|
|
2170 |
* <code>DataFlavorComparator</code>.
|
|
2171 |
*/
|
|
2172 |
public static DataFlavor[] keysToDataFlavorArray(Map map) {
|
|
2173 |
return setToSortedDataFlavorArray(map.keySet(), map);
|
|
2174 |
}
|
|
2175 |
|
|
2176 |
/**
|
|
2177 |
* Helper function to convert a Set of DataFlavors to a sorted array.
|
|
2178 |
* The array will be sorted according to <code>DataFlavorComparator</code>.
|
|
2179 |
*/
|
|
2180 |
public static DataFlavor[] setToSortedDataFlavorArray(Set flavorsSet) {
|
|
2181 |
DataFlavor[] flavors = new DataFlavor[flavorsSet.size()];
|
|
2182 |
flavorsSet.toArray(flavors);
|
|
2183 |
Arrays.sort(flavors, defaultFlavorComparator);
|
|
2184 |
return flavors;
|
|
2185 |
}
|
|
2186 |
|
|
2187 |
/**
|
|
2188 |
* Helper function to convert a Set of DataFlavors to a sorted array.
|
|
2189 |
* The array will be sorted according to a
|
|
2190 |
* <code>DataFlavorComparator</code> created with the specified
|
|
2191 |
* flavor-to-native map as an argument.
|
|
2192 |
*/
|
|
2193 |
public static DataFlavor[] setToSortedDataFlavorArray
|
|
2194 |
(Set flavorsSet, Map flavorToNativeMap)
|
|
2195 |
{
|
|
2196 |
DataFlavor[] flavors = new DataFlavor[flavorsSet.size()];
|
|
2197 |
flavorsSet.toArray(flavors);
|
|
2198 |
Comparator comparator =
|
|
2199 |
new DataFlavorComparator(flavorToNativeMap,
|
|
2200 |
IndexedComparator.SELECT_WORST);
|
|
2201 |
Arrays.sort(flavors, comparator);
|
|
2202 |
return flavors;
|
|
2203 |
}
|
|
2204 |
|
|
2205 |
/**
|
|
2206 |
* Helper function to convert an InputStream to a byte[] array.
|
|
2207 |
*/
|
|
2208 |
protected static byte[] inputStreamToByteArray(InputStream str)
|
|
2209 |
throws IOException
|
|
2210 |
{
|
|
2211 |
ByteArrayOutputStream baos = new ByteArrayOutputStream();
|
|
2212 |
int len = 0;
|
|
2213 |
byte[] buf = new byte[8192];
|
|
2214 |
|
|
2215 |
while ((len = str.read(buf)) != -1) {
|
|
2216 |
baos.write(buf, 0, len);
|
|
2217 |
}
|
|
2218 |
|
|
2219 |
return baos.toByteArray();
|
|
2220 |
}
|
|
2221 |
|
|
2222 |
/**
|
|
2223 |
* Returns platform-specific mappings for the specified native.
|
|
2224 |
* If there are no platform-specific mappings for this native, the method
|
|
2225 |
* returns an empty <code>List</code>.
|
|
2226 |
*/
|
|
2227 |
public List getPlatformMappingsForNative(String nat) {
|
|
2228 |
return new ArrayList();
|
|
2229 |
}
|
|
2230 |
|
|
2231 |
/**
|
|
2232 |
* Returns platform-specific mappings for the specified flavor.
|
|
2233 |
* If there are no platform-specific mappings for this flavor, the method
|
|
2234 |
* returns an empty <code>List</code>.
|
|
2235 |
*/
|
|
2236 |
public List getPlatformMappingsForFlavor(DataFlavor df) {
|
|
2237 |
return new ArrayList();
|
|
2238 |
}
|
|
2239 |
|
|
2240 |
private static CharsetComparator defaultCharsetComparator =
|
|
2241 |
new CharsetComparator(IndexedComparator.SELECT_WORST);
|
|
2242 |
private static DataFlavorComparator defaultFlavorComparator =
|
|
2243 |
new DataFlavorComparator(IndexedComparator.SELECT_WORST);
|
|
2244 |
|
|
2245 |
/**
|
|
2246 |
* A Comparator which includes a helper function for comparing two Objects
|
|
2247 |
* which are likely to be keys in the specified Map.
|
|
2248 |
*/
|
|
2249 |
public abstract static class IndexedComparator implements Comparator {
|
|
2250 |
|
|
2251 |
/**
|
|
2252 |
* The best Object (e.g., DataFlavor) will be the last in sequence.
|
|
2253 |
*/
|
|
2254 |
public static final boolean SELECT_BEST = true;
|
|
2255 |
|
|
2256 |
/**
|
|
2257 |
* The best Object (e.g., DataFlavor) will be the first in sequence.
|
|
2258 |
*/
|
|
2259 |
public static final boolean SELECT_WORST = false;
|
|
2260 |
|
|
2261 |
protected final boolean order;
|
|
2262 |
|
|
2263 |
public IndexedComparator() {
|
|
2264 |
this(SELECT_BEST);
|
|
2265 |
}
|
|
2266 |
|
|
2267 |
public IndexedComparator(boolean order) {
|
|
2268 |
this.order = order;
|
|
2269 |
}
|
|
2270 |
|
|
2271 |
/**
|
|
2272 |
* Helper method to compare two objects by their Integer indices in the
|
|
2273 |
* given map. If the map doesn't contain an entry for either of the
|
|
2274 |
* objects, the fallback index will be used for the object instead.
|
|
2275 |
*
|
|
2276 |
* @param indexMap the map which maps objects into Integer indexes.
|
|
2277 |
* @param obj1 the first object to be compared.
|
|
2278 |
* @param obj2 the second object to be compared.
|
|
2279 |
* @param fallbackIndex the Integer to be used as a fallback index.
|
|
2280 |
* @return a negative integer, zero, or a positive integer as the
|
|
2281 |
* first object is mapped to a less, equal to, or greater
|
|
2282 |
* index than the second.
|
|
2283 |
*/
|
|
2284 |
protected static int compareIndices(Map indexMap,
|
|
2285 |
Object obj1, Object obj2,
|
|
2286 |
Integer fallbackIndex) {
|
|
2287 |
Integer index1 = (Integer)indexMap.get(obj1);
|
|
2288 |
Integer index2 = (Integer)indexMap.get(obj2);
|
|
2289 |
|
|
2290 |
if (index1 == null) {
|
|
2291 |
index1 = fallbackIndex;
|
|
2292 |
}
|
|
2293 |
if (index2 == null) {
|
|
2294 |
index2 = fallbackIndex;
|
|
2295 |
}
|
|
2296 |
|
|
2297 |
return index1.compareTo(index2);
|
|
2298 |
}
|
|
2299 |
|
|
2300 |
/**
|
|
2301 |
* Helper method to compare two objects by their Long indices in the
|
|
2302 |
* given map. If the map doesn't contain an entry for either of the
|
|
2303 |
* objects, the fallback index will be used for the object instead.
|
|
2304 |
*
|
|
2305 |
* @param indexMap the map which maps objects into Long indexes.
|
|
2306 |
* @param obj1 the first object to be compared.
|
|
2307 |
* @param obj2 the second object to be compared.
|
|
2308 |
* @param fallbackIndex the Long to be used as a fallback index.
|
|
2309 |
* @return a negative integer, zero, or a positive integer as the
|
|
2310 |
* first object is mapped to a less, equal to, or greater
|
|
2311 |
* index than the second.
|
|
2312 |
*/
|
|
2313 |
protected static int compareLongs(Map indexMap,
|
|
2314 |
Object obj1, Object obj2,
|
|
2315 |
Long fallbackIndex) {
|
|
2316 |
Long index1 = (Long)indexMap.get(obj1);
|
|
2317 |
Long index2 = (Long)indexMap.get(obj2);
|
|
2318 |
|
|
2319 |
if (index1 == null) {
|
|
2320 |
index1 = fallbackIndex;
|
|
2321 |
}
|
|
2322 |
if (index2 == null) {
|
|
2323 |
index2 = fallbackIndex;
|
|
2324 |
}
|
|
2325 |
|
|
2326 |
return index1.compareTo(index2);
|
|
2327 |
}
|
|
2328 |
}
|
|
2329 |
|
|
2330 |
/**
|
|
2331 |
* An IndexedComparator which compares two String charsets. The comparison
|
|
2332 |
* follows the rules outlined in DataFlavor.selectBestTextFlavor. In order
|
|
2333 |
* to ensure that non-Unicode, non-ASCII, non-default charsets are sorted
|
|
2334 |
* in alphabetical order, charsets are not automatically converted to their
|
|
2335 |
* canonical forms.
|
|
2336 |
*/
|
|
2337 |
public static class CharsetComparator extends IndexedComparator {
|
|
2338 |
private static final Map charsets;
|
|
2339 |
private static String defaultEncoding;
|
|
2340 |
|
|
2341 |
private static final Integer DEFAULT_CHARSET_INDEX = Integer.valueOf(2);
|
|
2342 |
private static final Integer OTHER_CHARSET_INDEX = Integer.valueOf(1);
|
|
2343 |
private static final Integer WORST_CHARSET_INDEX = Integer.valueOf(0);
|
|
2344 |
private static final Integer UNSUPPORTED_CHARSET_INDEX =
|
|
2345 |
Integer.valueOf(Integer.MIN_VALUE);
|
|
2346 |
|
|
2347 |
private static final String UNSUPPORTED_CHARSET = "UNSUPPORTED";
|
|
2348 |
|
|
2349 |
static {
|
|
2350 |
HashMap charsetsMap = new HashMap(8, 1.0f);
|
|
2351 |
|
|
2352 |
// we prefer Unicode charsets
|
|
2353 |
charsetsMap.put(canonicalName("UTF-16LE"), Integer.valueOf(4));
|
|
2354 |
charsetsMap.put(canonicalName("UTF-16BE"), Integer.valueOf(5));
|
|
2355 |
charsetsMap.put(canonicalName("UTF-8"), Integer.valueOf(6));
|
|
2356 |
charsetsMap.put(canonicalName("UTF-16"), Integer.valueOf(7));
|
|
2357 |
|
|
2358 |
// US-ASCII is the worst charset supported
|
|
2359 |
charsetsMap.put(canonicalName("US-ASCII"), WORST_CHARSET_INDEX);
|
|
2360 |
|
|
2361 |
String defEncoding = DataTransferer.canonicalName
|
|
2362 |
(DataTransferer.getDefaultTextCharset());
|
|
2363 |
|
|
2364 |
if (charsetsMap.get(defaultEncoding) == null) {
|
|
2365 |
charsetsMap.put(defaultEncoding, DEFAULT_CHARSET_INDEX);
|
|
2366 |
}
|
|
2367 |
charsetsMap.put(UNSUPPORTED_CHARSET, UNSUPPORTED_CHARSET_INDEX);
|
|
2368 |
|
|
2369 |
charsets = Collections.unmodifiableMap(charsetsMap);
|
|
2370 |
}
|
|
2371 |
|
|
2372 |
public CharsetComparator() {
|
|
2373 |
this(SELECT_BEST);
|
|
2374 |
}
|
|
2375 |
|
|
2376 |
public CharsetComparator(boolean order) {
|
|
2377 |
super(order);
|
|
2378 |
}
|
|
2379 |
|
|
2380 |
/**
|
|
2381 |
* Compares two String objects. Returns a negative integer, zero,
|
|
2382 |
* or a positive integer as the first charset is worse than, equal to,
|
|
2383 |
* or better than the second.
|
|
2384 |
*
|
|
2385 |
* @param obj1 the first charset to be compared
|
|
2386 |
* @param obj2 the second charset to be compared
|
|
2387 |
* @return a negative integer, zero, or a positive integer as the
|
|
2388 |
* first argument is worse, equal to, or better than the
|
|
2389 |
* second.
|
|
2390 |
* @throws ClassCastException if either of the arguments is not
|
|
2391 |
* instance of String
|
|
2392 |
* @throws NullPointerException if either of the arguments is
|
|
2393 |
* <code>null</code>.
|
|
2394 |
*/
|
|
2395 |
public int compare(Object obj1, Object obj2) {
|
|
2396 |
String charset1 = null;
|
|
2397 |
String charset2 = null;
|
|
2398 |
if (order == SELECT_BEST) {
|
|
2399 |
charset1 = (String)obj1;
|
|
2400 |
charset2 = (String)obj2;
|
|
2401 |
} else {
|
|
2402 |
charset1 = (String)obj2;
|
|
2403 |
charset2 = (String)obj1;
|
|
2404 |
}
|
|
2405 |
|
|
2406 |
return compareCharsets(charset1, charset2);
|
|
2407 |
}
|
|
2408 |
|
|
2409 |
/**
|
|
2410 |
* Compares charsets. Returns a negative integer, zero, or a positive
|
|
2411 |
* integer as the first charset is worse than, equal to, or better than
|
|
2412 |
* the second.
|
|
2413 |
* <p>
|
|
2414 |
* Charsets are ordered according to the following rules:
|
|
2415 |
* <ul>
|
|
2416 |
* <li>All unsupported charsets are equal.
|
|
2417 |
* <li>Any unsupported charset is worse than any supported charset.
|
|
2418 |
* <li>Unicode charsets, such as "UTF-16", "UTF-8", "UTF-16BE" and
|
|
2419 |
* "UTF-16LE", are considered best.
|
|
2420 |
* <li>After them, platform default charset is selected.
|
|
2421 |
* <li>"US-ASCII" is the worst of supported charsets.
|
|
2422 |
* <li>For all other supported charsets, the lexicographically less
|
|
2423 |
* one is considered the better.
|
|
2424 |
* </ul>
|
|
2425 |
*
|
|
2426 |
* @param charset1 the first charset to be compared
|
|
2427 |
* @param charset2 the second charset to be compared.
|
|
2428 |
* @return a negative integer, zero, or a positive integer as the
|
|
2429 |
* first argument is worse, equal to, or better than the
|
|
2430 |
* second.
|
|
2431 |
*/
|
|
2432 |
protected int compareCharsets(String charset1, String charset2) {
|
|
2433 |
charset1 = getEncoding(charset1);
|
|
2434 |
charset2 = getEncoding(charset2);
|
|
2435 |
|
|
2436 |
int comp = compareIndices(charsets, charset1, charset2,
|
|
2437 |
OTHER_CHARSET_INDEX);
|
|
2438 |
|
|
2439 |
if (comp == 0) {
|
|
2440 |
return charset2.compareTo(charset1);
|
|
2441 |
}
|
|
2442 |
|
|
2443 |
return comp;
|
|
2444 |
}
|
|
2445 |
|
|
2446 |
/**
|
|
2447 |
* Returns encoding for the specified charset according to the
|
|
2448 |
* following rules:
|
|
2449 |
* <ul>
|
|
2450 |
* <li>If the charset is <code>null</code>, then <code>null</code> will
|
|
2451 |
* be returned.
|
|
2452 |
* <li>Iff the charset specifies an encoding unsupported by this JRE,
|
|
2453 |
* <code>UNSUPPORTED_CHARSET</code> will be returned.
|
|
2454 |
* <li>If the charset specifies an alias name, the corresponding
|
|
2455 |
* canonical name will be returned iff the charset is a known
|
|
2456 |
* Unicode, ASCII, or default charset.
|
|
2457 |
* </ul>
|
|
2458 |
*
|
|
2459 |
* @param charset the charset.
|
|
2460 |
* @return an encoding for this charset.
|
|
2461 |
*/
|
|
2462 |
protected static String getEncoding(String charset) {
|
|
2463 |
if (charset == null) {
|
|
2464 |
return null;
|
|
2465 |
} else if (!DataTransferer.isEncodingSupported(charset)) {
|
|
2466 |
return UNSUPPORTED_CHARSET;
|
|
2467 |
} else {
|
|
2468 |
// Only convert to canonical form if the charset is one
|
|
2469 |
// of the charsets explicitly listed in the known charsets
|
|
2470 |
// map. This will happen only for Unicode, ASCII, or default
|
|
2471 |
// charsets.
|
|
2472 |
String canonicalName = DataTransferer.canonicalName(charset);
|
|
2473 |
return (charsets.containsKey(canonicalName))
|
|
2474 |
? canonicalName
|
|
2475 |
: charset;
|
|
2476 |
}
|
|
2477 |
}
|
|
2478 |
}
|
|
2479 |
|
|
2480 |
/**
|
|
2481 |
* An IndexedComparator which compares two DataFlavors. For text flavors,
|
|
2482 |
* the comparison follows the rules outlined in
|
|
2483 |
* DataFlavor.selectBestTextFlavor. For non-text flavors, unknown
|
|
2484 |
* application MIME types are preferred, followed by known
|
|
2485 |
* application/x-java-* MIME types. Unknown application types are preferred
|
|
2486 |
* because if the user provides his own data flavor, it will likely be the
|
|
2487 |
* most descriptive one. For flavors which are otherwise equal, the
|
|
2488 |
* flavors' native formats are compared, with greater long values
|
|
2489 |
* taking precedence.
|
|
2490 |
*/
|
|
2491 |
public static class DataFlavorComparator extends IndexedComparator {
|
|
2492 |
protected final Map flavorToFormatMap;
|
|
2493 |
|
|
2494 |
private final CharsetComparator charsetComparator;
|
|
2495 |
|
|
2496 |
private static final Map exactTypes;
|
|
2497 |
private static final Map primaryTypes;
|
|
2498 |
private static final Map nonTextRepresentations;
|
|
2499 |
private static final Map textTypes;
|
|
2500 |
private static final Map decodedTextRepresentations;
|
|
2501 |
private static final Map encodedTextRepresentations;
|
|
2502 |
|
|
2503 |
private static final Integer UNKNOWN_OBJECT_LOSES =
|
|
2504 |
Integer.valueOf(Integer.MIN_VALUE);
|
|
2505 |
private static final Integer UNKNOWN_OBJECT_WINS =
|
|
2506 |
Integer.valueOf(Integer.MAX_VALUE);
|
|
2507 |
|
|
2508 |
private static final Long UNKNOWN_OBJECT_LOSES_L =
|
|
2509 |
Long.valueOf(Long.MIN_VALUE);
|
|
2510 |
private static final Long UNKNOWN_OBJECT_WINS_L =
|
|
2511 |
Long.valueOf(Long.MAX_VALUE);
|
|
2512 |
|
|
2513 |
static {
|
|
2514 |
{
|
|
2515 |
HashMap exactTypesMap = new HashMap(4, 1.0f);
|
|
2516 |
|
|
2517 |
// application/x-java-* MIME types
|
|
2518 |
exactTypesMap.put("application/x-java-file-list",
|
|
2519 |
Integer.valueOf(0));
|
|
2520 |
exactTypesMap.put("application/x-java-serialized-object",
|
|
2521 |
Integer.valueOf(1));
|
|
2522 |
exactTypesMap.put("application/x-java-jvm-local-objectref",
|
|
2523 |
Integer.valueOf(2));
|
|
2524 |
exactTypesMap.put("application/x-java-remote-object",
|
|
2525 |
Integer.valueOf(3));
|
|
2526 |
|
|
2527 |
exactTypes = Collections.unmodifiableMap(exactTypesMap);
|
|
2528 |
}
|
|
2529 |
|
|
2530 |
{
|
|
2531 |
HashMap primaryTypesMap = new HashMap(1, 1.0f);
|
|
2532 |
|
|
2533 |
primaryTypesMap.put("application", Integer.valueOf(0));
|
|
2534 |
|
|
2535 |
primaryTypes = Collections.unmodifiableMap(primaryTypesMap);
|
|
2536 |
}
|
|
2537 |
|
|
2538 |
{
|
|
2539 |
HashMap nonTextRepresentationsMap = new HashMap(3, 1.0f);
|
|
2540 |
|
|
2541 |
nonTextRepresentationsMap.put(java.io.InputStream.class,
|
|
2542 |
Integer.valueOf(0));
|
|
2543 |
nonTextRepresentationsMap.put(java.io.Serializable.class,
|
|
2544 |
Integer.valueOf(1));
|
|
2545 |
nonTextRepresentationsMap.put(java.rmi.Remote.class,
|
|
2546 |
Integer.valueOf(2));
|
|
2547 |
|
|
2548 |
nonTextRepresentations =
|
|
2549 |
Collections.unmodifiableMap(nonTextRepresentationsMap);
|
|
2550 |
}
|
|
2551 |
|
|
2552 |
{
|
|
2553 |
HashMap textTypesMap = new HashMap(16, 1.0f);
|
|
2554 |
|
|
2555 |
// plain text
|
|
2556 |
textTypesMap.put("text/plain", Integer.valueOf(0));
|
|
2557 |
|
|
2558 |
// stringFlavor
|
|
2559 |
textTypesMap.put("application/x-java-serialized-object",
|
|
2560 |
Integer.valueOf(1));
|
|
2561 |
|
|
2562 |
// misc
|
|
2563 |
textTypesMap.put("text/calendar", Integer.valueOf(2));
|
|
2564 |
textTypesMap.put("text/css", Integer.valueOf(3));
|
|
2565 |
textTypesMap.put("text/directory", Integer.valueOf(4));
|
|
2566 |
textTypesMap.put("text/parityfec", Integer.valueOf(5));
|
|
2567 |
textTypesMap.put("text/rfc822-headers", Integer.valueOf(6));
|
|
2568 |
textTypesMap.put("text/t140", Integer.valueOf(7));
|
|
2569 |
textTypesMap.put("text/tab-separated-values", Integer.valueOf(8));
|
|
2570 |
textTypesMap.put("text/uri-list", Integer.valueOf(9));
|
|
2571 |
|
|
2572 |
// enriched
|
|
2573 |
textTypesMap.put("text/richtext", Integer.valueOf(10));
|
|
2574 |
textTypesMap.put("text/enriched", Integer.valueOf(11));
|
|
2575 |
textTypesMap.put("text/rtf", Integer.valueOf(12));
|
|
2576 |
|
|
2577 |
// markup
|
|
2578 |
textTypesMap.put("text/html", Integer.valueOf(13));
|
|
2579 |
textTypesMap.put("text/xml", Integer.valueOf(14));
|
|
2580 |
textTypesMap.put("text/sgml", Integer.valueOf(15));
|
|
2581 |
|
|
2582 |
textTypes = Collections.unmodifiableMap(textTypesMap);
|
|
2583 |
}
|
|
2584 |
|
|
2585 |
{
|
|
2586 |
HashMap decodedTextRepresentationsMap = new HashMap(4, 1.0f);
|
|
2587 |
|
|
2588 |
decodedTextRepresentationsMap.put
|
|
2589 |
(DataTransferer.charArrayClass, Integer.valueOf(0));
|
|
2590 |
decodedTextRepresentationsMap.put
|
|
2591 |
(java.nio.CharBuffer.class, Integer.valueOf(1));
|
|
2592 |
decodedTextRepresentationsMap.put
|
|
2593 |
(java.lang.String.class, Integer.valueOf(2));
|
|
2594 |
decodedTextRepresentationsMap.put
|
|
2595 |
(java.io.Reader.class, Integer.valueOf(3));
|
|
2596 |
|
|
2597 |
decodedTextRepresentations =
|
|
2598 |
Collections.unmodifiableMap(decodedTextRepresentationsMap);
|
|
2599 |
}
|
|
2600 |
|
|
2601 |
{
|
|
2602 |
HashMap encodedTextRepresentationsMap = new HashMap(3, 1.0f);
|
|
2603 |
|
|
2604 |
encodedTextRepresentationsMap.put
|
|
2605 |
(DataTransferer.byteArrayClass, Integer.valueOf(0));
|
|
2606 |
encodedTextRepresentationsMap.put
|
|
2607 |
(java.nio.ByteBuffer.class, Integer.valueOf(1));
|
|
2608 |
encodedTextRepresentationsMap.put
|
|
2609 |
(java.io.InputStream.class, Integer.valueOf(2));
|
|
2610 |
|
|
2611 |
encodedTextRepresentations =
|
|
2612 |
Collections.unmodifiableMap(encodedTextRepresentationsMap);
|
|
2613 |
}
|
|
2614 |
}
|
|
2615 |
|
|
2616 |
public DataFlavorComparator() {
|
|
2617 |
this(SELECT_BEST);
|
|
2618 |
}
|
|
2619 |
|
|
2620 |
public DataFlavorComparator(boolean order) {
|
|
2621 |
super(order);
|
|
2622 |
|
|
2623 |
charsetComparator = new CharsetComparator(order);
|
|
2624 |
flavorToFormatMap = Collections.EMPTY_MAP;
|
|
2625 |
}
|
|
2626 |
|
|
2627 |
public DataFlavorComparator(Map map) {
|
|
2628 |
this(map, SELECT_BEST);
|
|
2629 |
}
|
|
2630 |
|
|
2631 |
public DataFlavorComparator(Map map, boolean order) {
|
|
2632 |
super(order);
|
|
2633 |
|
|
2634 |
charsetComparator = new CharsetComparator(order);
|
|
2635 |
HashMap hashMap = new HashMap(map.size());
|
|
2636 |
hashMap.putAll(map);
|
|
2637 |
flavorToFormatMap = Collections.unmodifiableMap(hashMap);
|
|
2638 |
}
|
|
2639 |
|
|
2640 |
public int compare(Object obj1, Object obj2) {
|
|
2641 |
DataFlavor flavor1 = null;
|
|
2642 |
DataFlavor flavor2 = null;
|
|
2643 |
if (order == SELECT_BEST) {
|
|
2644 |
flavor1 = (DataFlavor)obj1;
|
|
2645 |
flavor2 = (DataFlavor)obj2;
|
|
2646 |
} else {
|
|
2647 |
flavor1 = (DataFlavor)obj2;
|
|
2648 |
flavor2 = (DataFlavor)obj1;
|
|
2649 |
}
|
|
2650 |
|
|
2651 |
if (flavor1.equals(flavor2)) {
|
|
2652 |
return 0;
|
|
2653 |
}
|
|
2654 |
|
|
2655 |
int comp = 0;
|
|
2656 |
|
|
2657 |
String primaryType1 = flavor1.getPrimaryType();
|
|
2658 |
String subType1 = flavor1.getSubType();
|
|
2659 |
String mimeType1 = primaryType1 + "/" + subType1;
|
|
2660 |
Class class1 = flavor1.getRepresentationClass();
|
|
2661 |
|
|
2662 |
String primaryType2 = flavor2.getPrimaryType();
|
|
2663 |
String subType2 = flavor2.getSubType();
|
|
2664 |
String mimeType2 = primaryType2 + "/" + subType2;
|
|
2665 |
Class class2 = flavor2.getRepresentationClass();
|
|
2666 |
|
|
2667 |
if (flavor1.isFlavorTextType() && flavor2.isFlavorTextType()) {
|
|
2668 |
// First, compare MIME types
|
|
2669 |
comp = compareIndices(textTypes, mimeType1, mimeType2,
|
|
2670 |
UNKNOWN_OBJECT_LOSES);
|
|
2671 |
if (comp != 0) {
|
|
2672 |
return comp;
|
|
2673 |
}
|
|
2674 |
|
|
2675 |
// Only need to test one flavor because they both have the
|
|
2676 |
// same MIME type. Also don't need to worry about accidentally
|
|
2677 |
// passing stringFlavor because either
|
|
2678 |
// 1. Both flavors are stringFlavor, in which case the
|
|
2679 |
// equality test at the top of the function succeeded.
|
|
2680 |
// 2. Only one flavor is stringFlavor, in which case the MIME
|
|
2681 |
// type comparison returned a non-zero value.
|
|
2682 |
if (doesSubtypeSupportCharset(flavor1)) {
|
|
2683 |
// Next, prefer the decoded text representations of Reader,
|
|
2684 |
// String, CharBuffer, and [C, in that order.
|
|
2685 |
comp = compareIndices(decodedTextRepresentations, class1,
|
|
2686 |
class2, UNKNOWN_OBJECT_LOSES);
|
|
2687 |
if (comp != 0) {
|
|
2688 |
return comp;
|
|
2689 |
}
|
|
2690 |
|
|
2691 |
// Next, compare charsets
|
|
2692 |
comp = charsetComparator.compareCharsets
|
|
2693 |
(DataTransferer.getTextCharset(flavor1),
|
|
2694 |
DataTransferer.getTextCharset(flavor2));
|
|
2695 |
if (comp != 0) {
|
|
2696 |
return comp;
|
|
2697 |
}
|
|
2698 |
}
|
|
2699 |
|
|
2700 |
// Finally, prefer the encoded text representations of
|
|
2701 |
// InputStream, ByteBuffer, and [B, in that order.
|
|
2702 |
comp = compareIndices(encodedTextRepresentations, class1,
|
|
2703 |
class2, UNKNOWN_OBJECT_LOSES);
|
|
2704 |
if (comp != 0) {
|
|
2705 |
return comp;
|
|
2706 |
}
|
|
2707 |
} else {
|
|
2708 |
// First, prefer application types.
|
|
2709 |
comp = compareIndices(primaryTypes, primaryType1, primaryType2,
|
|
2710 |
UNKNOWN_OBJECT_LOSES);
|
|
2711 |
if (comp != 0) {
|
|
2712 |
return comp;
|
|
2713 |
}
|
|
2714 |
|
|
2715 |
// Next, look for application/x-java-* types. Prefer unknown
|
|
2716 |
// MIME types because if the user provides his own data flavor,
|
|
2717 |
// it will likely be the most descriptive one.
|
|
2718 |
comp = compareIndices(exactTypes, mimeType1, mimeType2,
|
|
2719 |
UNKNOWN_OBJECT_WINS);
|
|
2720 |
if (comp != 0) {
|
|
2721 |
return comp;
|
|
2722 |
}
|
|
2723 |
|
|
2724 |
// Finally, prefer the representation classes of Remote,
|
|
2725 |
// Serializable, and InputStream, in that order.
|
|
2726 |
comp = compareIndices(nonTextRepresentations, class1, class2,
|
|
2727 |
UNKNOWN_OBJECT_LOSES);
|
|
2728 |
if (comp != 0) {
|
|
2729 |
return comp;
|
|
2730 |
}
|
|
2731 |
}
|
|
2732 |
|
|
2733 |
// As a last resort, take the DataFlavor with the greater integer
|
|
2734 |
// format.
|
|
2735 |
return compareLongs(flavorToFormatMap, flavor1, flavor2,
|
|
2736 |
UNKNOWN_OBJECT_LOSES_L);
|
|
2737 |
}
|
|
2738 |
}
|
|
2739 |
|
|
2740 |
/*
|
|
2741 |
* Given the Map that maps objects to Integer indices and a boolean value,
|
|
2742 |
* this Comparator imposes a direct or reverse order on set of objects.
|
|
2743 |
* <p>
|
|
2744 |
* If the specified boolean value is SELECT_BEST, the Comparator imposes the
|
|
2745 |
* direct index-based order: an object A is greater than an object B if and
|
|
2746 |
* only if the index of A is greater than the index of B. An object that
|
|
2747 |
* doesn't have an associated index is less or equal than any other object.
|
|
2748 |
* <p>
|
|
2749 |
* If the specified boolean value is SELECT_WORST, the Comparator imposes the
|
|
2750 |
* reverse index-based order: an object A is greater than an object B if and
|
|
2751 |
* only if A is less than B with the direct index-based order.
|
|
2752 |
*/
|
|
2753 |
public static class IndexOrderComparator extends IndexedComparator {
|
|
2754 |
private final Map indexMap;
|
|
2755 |
private static final Integer FALLBACK_INDEX =
|
|
2756 |
Integer.valueOf(Integer.MIN_VALUE);
|
|
2757 |
|
|
2758 |
public IndexOrderComparator(Map indexMap) {
|
|
2759 |
super(SELECT_BEST);
|
|
2760 |
this.indexMap = indexMap;
|
|
2761 |
}
|
|
2762 |
|
|
2763 |
public IndexOrderComparator(Map indexMap, boolean order) {
|
|
2764 |
super(order);
|
|
2765 |
this.indexMap = indexMap;
|
|
2766 |
}
|
|
2767 |
|
|
2768 |
public int compare(Object obj1, Object obj2) {
|
|
2769 |
if (order == SELECT_WORST) {
|
|
2770 |
return -compareIndices(indexMap, obj1, obj2, FALLBACK_INDEX);
|
|
2771 |
} else {
|
|
2772 |
return compareIndices(indexMap, obj1, obj2, FALLBACK_INDEX);
|
|
2773 |
}
|
|
2774 |
}
|
|
2775 |
}
|
|
2776 |
}
|