| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.tools.ant.taskdefs; |
| |
| |
| import java.io.BufferedInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.util.FileUtils; |
| import org.apache.tools.bzip2.CBZip2InputStream; |
| |
| /** |
| * Expands a file that has been compressed with the BZIP2 |
| * algorithm. Normally used to compress non-compressed archives such |
| * as TAR files. |
| * |
| * @since Ant 1.5 |
| * |
| * @ant.task category="packaging" |
| */ |
| |
| public class BUnzip2 extends Unpack { |
| |
| private static final int BUFFER_SIZE = 8 * 1024; |
| |
| private static final String DEFAULT_EXTENSION = ".bz2"; |
| |
| /** |
| * Get the default extension. |
| * @return the string ".bz2" |
| */ |
| protected String getDefaultExtension() { |
| return DEFAULT_EXTENSION; |
| } |
| |
| /** |
| * Do the unbzipping. |
| */ |
| protected void extract() { |
| if (srcResource.getLastModified() > dest.lastModified()) { |
| log("Expanding " + srcResource.getName() + " to " |
| + dest.getAbsolutePath()); |
| |
| FileOutputStream out = null; |
| CBZip2InputStream zIn = null; |
| InputStream fis = null; |
| BufferedInputStream bis = null; |
| try { |
| out = new FileOutputStream(dest); |
| fis = srcResource.getInputStream(); |
| bis = new BufferedInputStream(fis); |
| int b = bis.read(); |
| if (b != 'B') { |
| throw new BuildException("Invalid bz2 file.", getLocation()); |
| } |
| b = bis.read(); |
| if (b != 'Z') { |
| throw new BuildException("Invalid bz2 file.", getLocation()); |
| } |
| zIn = new CBZip2InputStream(bis, true); |
| byte[] buffer = new byte[BUFFER_SIZE]; |
| int count = 0; |
| do { |
| out.write(buffer, 0, count); |
| count = zIn.read(buffer, 0, buffer.length); |
| } while (count != -1); |
| } catch (IOException ioe) { |
| String msg = "Problem expanding bzip2 " + ioe.getMessage(); |
| throw new BuildException(msg, ioe, getLocation()); |
| } finally { |
| FileUtils.close(bis); |
| FileUtils.close(fis); |
| FileUtils.close(out); |
| FileUtils.close(zIn); |
| } |
| } |
| } |
| |
| /** |
| * Whether this task can deal with non-file resources. |
| * |
| * <p>This implementation returns true only if this task is |
| * <gunzip>. Any subclass of this class that also wants to |
| * support non-file resources needs to override this method. We |
| * need to do so for backwards compatibility reasons since we |
| * can't expect subclasses to support resources.</p> |
| * @return true if this class supports non file resources. |
| * @since Ant 1.7 |
| */ |
| protected boolean supportsNonFileResources() { |
| return getClass().equals(BUnzip2.class); |
| } |
| } |