| /* |
| * 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.ant.compress.taskdefs; |
| |
| import java.io.BufferedInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.apache.ant.compress.util.CompressorStreamFactory; |
| import org.apache.ant.compress.util.FileAwareCompressorStreamFactory; |
| import org.apache.commons.compress.compressors.CompressorInputStream; |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.types.resources.FileProvider; |
| import org.apache.tools.ant.util.FileUtils; |
| import org.apache.tools.ant.taskdefs.Unpack; |
| |
| /** |
| * Expands a resource that has been compressed. |
| * |
| */ |
| public abstract class UnpackBase extends Unpack { |
| private static final int BUFFER_SIZE = 8 * 1024; |
| |
| private final String defaultExtension; |
| private final CompressorStreamFactory factory; |
| |
| protected UnpackBase(String defaultExtension, |
| CompressorStreamFactory factory) { |
| this.defaultExtension = defaultExtension; |
| this.factory = factory; |
| } |
| |
| /** |
| * Get the default extension. |
| */ |
| protected final String getDefaultExtension() { |
| return defaultExtension; |
| } |
| |
| /** |
| * Implement the gunzipping. |
| */ |
| protected void extract() { |
| if (source.lastModified() > dest.lastModified()) { |
| log("Expanding " + source.getAbsolutePath() + " to " |
| + dest.getAbsolutePath()); |
| |
| FileOutputStream out = null; |
| CompressorInputStream zIn = null; |
| InputStream fis = null; |
| try { |
| out = new FileOutputStream(dest); |
| if (factory instanceof FileAwareCompressorStreamFactory |
| && srcResource.as(FileProvider.class) != null) { |
| FileProvider p = |
| (FileProvider) srcResource.as(FileProvider.class); |
| FileAwareCompressorStreamFactory f = |
| (FileAwareCompressorStreamFactory) factory; |
| zIn = f.getCompressorInputStream(p.getFile()); |
| } else { |
| fis = srcResource.getInputStream(); |
| zIn = factory.getCompressorStream(new BufferedInputStream(fis)); |
| } |
| 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 " + ioe.getMessage(); |
| throw new BuildException(msg, ioe, getLocation()); |
| } finally { |
| FileUtils.close(fis); |
| FileUtils.close(out); |
| FileUtils.close(zIn); |
| } |
| } |
| } |
| |
| /** |
| * Yes, we can. |
| */ |
| protected final boolean supportsNonFileResources() { |
| return true; |
| } |
| } |