| /* |
| * Copyright 2009 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package com.google.gwt.core.ext.linker.impl; |
| |
| import com.google.gwt.core.ext.TreeLogger; |
| import com.google.gwt.core.ext.UnableToCompleteException; |
| import com.google.gwt.core.ext.linker.BinaryEmittedArtifact; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.jar.JarEntry; |
| import java.util.jar.JarFile; |
| |
| /** |
| *A <code>BinaryEmittedArtifact</code> that reads a jar entry. |
| */ |
| public class JarEntryEmittedArtifact extends BinaryEmittedArtifact { |
| /** |
| * An input stream that has its own open {@link JarFile}. When this stream is |
| * closed, the {@link JarFile} is as well. |
| */ |
| private class JarEntryInputStream extends InputStream { |
| private JarFile jarFile; |
| private InputStream stream; |
| |
| public JarEntryInputStream() throws IOException { |
| this.jarFile = new JarFile(file); |
| this.stream = jarFile.getInputStream(entry); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| stream.close(); |
| jarFile.close(); |
| } |
| |
| @Override |
| public int read() throws IOException { |
| return stream.read(); |
| } |
| |
| @Override |
| public int read(byte[] b) throws IOException { |
| return stream.read(b); |
| } |
| |
| @Override |
| public int read(byte[] b, int off, int len) throws IOException { |
| return stream.read(b, off, len); |
| } |
| } |
| |
| private final JarEntry entry; |
| private final File file; |
| |
| public JarEntryEmittedArtifact(String path, File jarFile, JarEntry entry) { |
| super(path); |
| this.file = jarFile; |
| this.entry = entry; |
| } |
| |
| @Override |
| public InputStream getContents(TreeLogger logger) |
| throws UnableToCompleteException { |
| try { |
| return new JarEntryInputStream(); |
| } catch (IOException e) { |
| logger.log(TreeLogger.ERROR, "unexpected IOException", e); |
| throw new UnableToCompleteException(); |
| } |
| } |
| |
| @Override |
| public long getLastModified() { |
| return entry.getTime(); |
| } |
| } |