--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/util/BaseFileManager.java Wed Jul 05 20:26:30 2017 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,443 +0,0 @@
-/*
- * Copyright (c) 2009, 2014, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package com.sun.tools.javac.util;
-
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStreamWriter;
-import java.lang.ref.SoftReference;
-import java.lang.reflect.Constructor;
-import java.net.URL;
-import java.net.URLClassLoader;
-import java.nio.ByteBuffer;
-import java.nio.CharBuffer;
-import java.nio.charset.Charset;
-import java.nio.charset.CharsetDecoder;
-import java.nio.charset.CoderResult;
-import java.nio.charset.CodingErrorAction;
-import java.nio.charset.IllegalCharsetNameException;
-import java.nio.charset.UnsupportedCharsetException;
-import java.nio.file.Path;
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.Map;
-import java.util.Objects;
-import java.util.Set;
-
-import javax.tools.JavaFileManager;
-import javax.tools.JavaFileObject;
-import javax.tools.JavaFileObject.Kind;
-
-import com.sun.tools.javac.code.Lint;
-import com.sun.tools.javac.code.Source;
-import com.sun.tools.javac.file.FSInfo;
-import com.sun.tools.javac.file.Locations;
-import com.sun.tools.javac.main.Option;
-import com.sun.tools.javac.main.OptionHelper;
-import com.sun.tools.javac.main.OptionHelper.GrumpyHelper;
-import com.sun.tools.javac.util.DefinedBy.Api;
-import com.sun.tools.javac.util.JCDiagnostic.SimpleDiagnosticPosition;
-
-/**
- * Utility methods for building a filemanager.
- * There are no references here to file-system specific objects such as
- * java.io.File or java.nio.file.Path.
- */
-public abstract class BaseFileManager implements JavaFileManager {
- protected BaseFileManager(Charset charset) {
- this.charset = charset;
- byteBufferCache = new ByteBufferCache();
- locations = createLocations();
- }
-
- /**
- * Set the context for JavacPathFileManager.
- * @param context the context containing items to be associated with the file manager
- */
- public void setContext(Context context) {
- log = Log.instance(context);
- options = Options.instance(context);
- classLoaderClass = options.get("procloader");
- locations.update(log, Lint.instance(context), FSInfo.instance(context));
- }
-
- protected Locations createLocations() {
- return new Locations();
- }
-
- /**
- * The log to be used for error reporting.
- */
- public Log log;
-
- /**
- * User provided charset (through javax.tools).
- */
- protected Charset charset;
-
- protected Options options;
-
- protected String classLoaderClass;
-
- protected Locations locations;
-
- /**
- * A flag for clients to use to indicate that this file manager should
- * be closed when it is no longer required.
- */
- public boolean autoClose;
-
- protected Source getSource() {
- String sourceName = options.get(Option.SOURCE);
- Source source = null;
- if (sourceName != null)
- source = Source.lookup(sourceName);
- return (source != null ? source : Source.DEFAULT);
- }
-
- protected ClassLoader getClassLoader(URL[] urls) {
- ClassLoader thisClassLoader = getClass().getClassLoader();
-
- // Allow the following to specify a closeable classloader
- // other than URLClassLoader.
-
- // 1: Allow client to specify the class to use via hidden option
- if (classLoaderClass != null) {
- try {
- Class<? extends ClassLoader> loader =
- Class.forName(classLoaderClass).asSubclass(ClassLoader.class);
- Class<?>[] constrArgTypes = { URL[].class, ClassLoader.class };
- Constructor<? extends ClassLoader> constr = loader.getConstructor(constrArgTypes);
- return constr.newInstance(urls, thisClassLoader);
- } catch (ReflectiveOperationException t) {
- // ignore errors loading user-provided class loader, fall through
- }
- }
- return new URLClassLoader(urls, thisClassLoader);
- }
-
- public boolean isDefaultBootClassPath() {
- return locations.isDefaultBootClassPath();
- }
-
- // <editor-fold defaultstate="collapsed" desc="Option handling">
- @Override @DefinedBy(Api.COMPILER)
- public boolean handleOption(String current, Iterator<String> remaining) {
- OptionHelper helper = new GrumpyHelper(log) {
- @Override
- public String get(Option option) {
- return options.get(option.getText());
- }
-
- @Override
- public void put(String name, String value) {
- options.put(name, value);
- }
-
- @Override
- public void remove(String name) {
- options.remove(name);
- }
-
- @Override
- public boolean handleFileManagerOption(Option option, String value) {
- return handleOption(option, value);
- }
- };
-
- for (Option o: javacFileManagerOptions) {
- if (o.matches(current)) {
- if (o.hasArg()) {
- if (remaining.hasNext()) {
- if (!o.process(helper, current, remaining.next()))
- return true;
- }
- } else {
- if (!o.process(helper, current))
- return true;
- }
- // operand missing, or process returned true
- throw new IllegalArgumentException(current);
- }
- }
-
- return false;
- }
- // where
- private static final Set<Option> javacFileManagerOptions =
- Option.getJavacFileManagerOptions();
-
- @Override @DefinedBy(Api.COMPILER)
- public int isSupportedOption(String option) {
- for (Option o : javacFileManagerOptions) {
- if (o.matches(option))
- return o.hasArg() ? 1 : 0;
- }
- return -1;
- }
-
- /**
- * Common back end for OptionHelper handleFileManagerOption.
- * @param option the option whose value to be set
- * @param value the value for the option
- * @return true if successful, and false otherwise
- */
- public boolean handleOption(Option option, String value) {
- return locations.handleOption(option, value);
- }
-
- /**
- * Call handleOption for collection of options and corresponding values.
- * @param map a collection of options and corresponding values
- * @return true if all the calls are successful
- */
- public boolean handleOptions(Map<Option, String> map) {
- boolean ok = true;
- for (Map.Entry<Option, String> e: map.entrySet())
- ok = ok & handleOption(e.getKey(), e.getValue());
- return ok;
- }
-
- // </editor-fold>
-
- // <editor-fold defaultstate="collapsed" desc="Encoding">
- private String defaultEncodingName;
- private String getDefaultEncodingName() {
- if (defaultEncodingName == null) {
- defaultEncodingName =
- new OutputStreamWriter(new ByteArrayOutputStream()).getEncoding();
- }
- return defaultEncodingName;
- }
-
- public String getEncodingName() {
- String encName = options.get(Option.ENCODING);
- if (encName == null)
- return getDefaultEncodingName();
- else
- return encName;
- }
-
- @SuppressWarnings("cast")
- public CharBuffer decode(ByteBuffer inbuf, boolean ignoreEncodingErrors) {
- String encodingName = getEncodingName();
- CharsetDecoder decoder;
- try {
- decoder = getDecoder(encodingName, ignoreEncodingErrors);
- } catch (IllegalCharsetNameException | UnsupportedCharsetException e) {
- log.error("unsupported.encoding", encodingName);
- return (CharBuffer)CharBuffer.allocate(1).flip();
- }
-
- // slightly overestimate the buffer size to avoid reallocation.
- float factor =
- decoder.averageCharsPerByte() * 0.8f +
- decoder.maxCharsPerByte() * 0.2f;
- CharBuffer dest = CharBuffer.
- allocate(10 + (int)(inbuf.remaining()*factor));
-
- while (true) {
- CoderResult result = decoder.decode(inbuf, dest, true);
- dest.flip();
-
- if (result.isUnderflow()) { // done reading
- // make sure there is at least one extra character
- if (dest.limit() == dest.capacity()) {
- dest = CharBuffer.allocate(dest.capacity()+1).put(dest);
- dest.flip();
- }
- return dest;
- } else if (result.isOverflow()) { // buffer too small; expand
- int newCapacity =
- 10 + dest.capacity() +
- (int)(inbuf.remaining()*decoder.maxCharsPerByte());
- dest = CharBuffer.allocate(newCapacity).put(dest);
- } else if (result.isMalformed() || result.isUnmappable()) {
- // bad character in input
-
- log.error(new SimpleDiagnosticPosition(dest.limit()),
- "illegal.char.for.encoding",
- charset == null ? encodingName : charset.name());
-
- // skip past the coding error
- inbuf.position(inbuf.position() + result.length());
-
- // undo the flip() to prepare the output buffer
- // for more translation
- dest.position(dest.limit());
- dest.limit(dest.capacity());
- dest.put((char)0xfffd); // backward compatible
- } else {
- throw new AssertionError(result);
- }
- }
- // unreached
- }
-
- public CharsetDecoder getDecoder(String encodingName, boolean ignoreEncodingErrors) {
- Charset cs = (this.charset == null)
- ? Charset.forName(encodingName)
- : this.charset;
- CharsetDecoder decoder = cs.newDecoder();
-
- CodingErrorAction action;
- if (ignoreEncodingErrors)
- action = CodingErrorAction.REPLACE;
- else
- action = CodingErrorAction.REPORT;
-
- return decoder
- .onMalformedInput(action)
- .onUnmappableCharacter(action);
- }
- // </editor-fold>
-
- // <editor-fold defaultstate="collapsed" desc="ByteBuffers">
- /**
- * Make a byte buffer from an input stream.
- * @param in the stream
- * @return a byte buffer containing the contents of the stream
- * @throws IOException if an error occurred while reading the stream
- */
- @SuppressWarnings("cast")
- public ByteBuffer makeByteBuffer(InputStream in)
- throws IOException {
- int limit = in.available();
- if (limit < 1024) limit = 1024;
- ByteBuffer result = byteBufferCache.get(limit);
- int position = 0;
- while (in.available() != 0) {
- if (position >= limit)
- // expand buffer
- result = ByteBuffer.
- allocate(limit <<= 1).
- put((ByteBuffer)result.flip());
- int count = in.read(result.array(),
- position,
- limit - position);
- if (count < 0) break;
- result.position(position += count);
- }
- return (ByteBuffer)result.flip();
- }
-
- public void recycleByteBuffer(ByteBuffer bb) {
- byteBufferCache.put(bb);
- }
-
- /**
- * A single-element cache of direct byte buffers.
- */
- @SuppressWarnings("cast")
- private static class ByteBufferCache {
- private ByteBuffer cached;
- ByteBuffer get(int capacity) {
- if (capacity < 20480) capacity = 20480;
- ByteBuffer result =
- (cached != null && cached.capacity() >= capacity)
- ? (ByteBuffer)cached.clear()
- : ByteBuffer.allocate(capacity + capacity>>1);
- cached = null;
- return result;
- }
- void put(ByteBuffer x) {
- cached = x;
- }
- }
-
- private final ByteBufferCache byteBufferCache;
- // </editor-fold>
-
- // <editor-fold defaultstate="collapsed" desc="Content cache">
- public CharBuffer getCachedContent(JavaFileObject file) {
- ContentCacheEntry e = contentCache.get(file);
- if (e == null)
- return null;
-
- if (!e.isValid(file)) {
- contentCache.remove(file);
- return null;
- }
-
- return e.getValue();
- }
-
- public void cache(JavaFileObject file, CharBuffer cb) {
- contentCache.put(file, new ContentCacheEntry(file, cb));
- }
-
- public void flushCache(JavaFileObject file) {
- contentCache.remove(file);
- }
-
- protected final Map<JavaFileObject, ContentCacheEntry> contentCache = new HashMap<>();
-
- protected static class ContentCacheEntry {
- final long timestamp;
- final SoftReference<CharBuffer> ref;
-
- ContentCacheEntry(JavaFileObject file, CharBuffer cb) {
- this.timestamp = file.getLastModified();
- this.ref = new SoftReference<>(cb);
- }
-
- boolean isValid(JavaFileObject file) {
- return timestamp == file.getLastModified();
- }
-
- CharBuffer getValue() {
- return ref.get();
- }
- }
- // </editor-fold>
-
- public static Kind getKind(Path path) {
- return getKind(path.getFileName().toString());
- }
-
- public static Kind getKind(String name) {
- if (name.endsWith(Kind.CLASS.extension))
- return Kind.CLASS;
- else if (name.endsWith(Kind.SOURCE.extension))
- return Kind.SOURCE;
- else if (name.endsWith(Kind.HTML.extension))
- return Kind.HTML;
- else
- return Kind.OTHER;
- }
-
- protected static <T> T nullCheck(T o) {
- return Objects.requireNonNull(o);
- }
-
- protected static <T> Collection<T> nullCheck(Collection<T> it) {
- for (T t : it)
- Objects.requireNonNull(t);
- return it;
- }
-}