jdk/src/share/classes/sun/awt/image/FileImageSource.java
author duke
Sat, 01 Dec 2007 00:00:00 +0000
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/*
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 * Copyright 1995-1996 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.image;
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import java.io.InputStream;
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import java.io.FileInputStream;
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import java.io.BufferedInputStream;
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import java.io.FileNotFoundException;
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public class FileImageSource extends InputStreamImageSource {
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    String imagefile;
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    public FileImageSource(String filename) {
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        SecurityManager security = System.getSecurityManager();
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        if (security != null) {
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            security.checkRead(filename);
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        }
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        imagefile = filename;
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    }
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    final boolean checkSecurity(Object context, boolean quiet) {
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        // File based images only ever need to be checked statically
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        // when the image is retrieved from the cache.
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        return true;
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    }
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    protected ImageDecoder getDecoder() {
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        InputStream is;
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        try {
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            is = new BufferedInputStream(new FileInputStream(imagefile));
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        } catch (FileNotFoundException e) {
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            return null;
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        }
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        // Don't believe the file suffix - many users don't know what
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        // kind of image they have and guess wrong...
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        /*
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        int suffixpos = imagefile.lastIndexOf('.');
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        if (suffixpos >= 0) {
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            String suffix = imagefile.substring(suffixpos+1).toLowerCase();
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            if (suffix.equals("gif")) {
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                return new GifImageDecoder(this, is);
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            } else if (suffix.equals("jpeg") || suffix.equals("jpg") ||
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                       suffix.equals("jpe") || suffix.equals("jfif")) {
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                return new JPEGImageDecoder(this, is);
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            } else if (suffix.equals("xbm")) {
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                return new XbmImageDecoder(this, is);
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            }
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        }
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        */
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        return getDecoder(is);
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    }
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}