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/* |
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* Licensed to the Apache Software Foundation (ASF) under one or more |
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* contributor license agreements. See the NOTICE file distributed with |
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* this work for additional information regarding copyright ownership. |
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* The ASF licenses this file to You under the Apache License, Version 2.0 |
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* (the "License"); you may not use this file except in compliance with |
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* the License. You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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package org.apache.tools.ant.taskdefs.optional.xz; |
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import java.io.FileOutputStream; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import org.apache.tools.ant.BuildException; |
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import org.apache.tools.ant.taskdefs.Unpack; |
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import org.apache.tools.ant.util.FileUtils; |
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import org.tukaani.xz.XZInputStream; |
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/** |
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* Expands a file that has been compressed with the XZ |
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* algorithm. Normally used to compress non-compressed archives such |
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* as TAR files. |
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* |
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* @since Ant 1.10.1 |
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* |
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* @ant.task category="packaging" |
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*/ |
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public class Unxz extends Unpack { |
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private static final int BUFFER_SIZE = 8 * 1024; |
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private static final String DEFAULT_EXTENSION = ".xz"; |
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/** |
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* Get the default extension. |
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* @return the value ".xz" |
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*/ |
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protected String getDefaultExtension() { |
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return DEFAULT_EXTENSION; |
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} |
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/** |
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* Implement the gunzipping. |
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*/ |
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protected void extract() { |
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if (srcResource.getLastModified() > dest.lastModified()) { |
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log("Expanding " + srcResource.getName() + " to " |
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+ dest.getAbsolutePath()); |
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FileOutputStream out = null; |
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XZInputStream zIn = null; |
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InputStream fis = null; |
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try { |
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out = new FileOutputStream(dest); |
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fis = srcResource.getInputStream(); |
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zIn = new XZInputStream(fis); |
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byte[] buffer = new byte[BUFFER_SIZE]; |
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int count = 0; |
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do { |
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out.write(buffer, 0, count); |
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count = zIn.read(buffer, 0, buffer.length); |
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} while (count != -1); |
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} catch (IOException ioe) { |
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String msg = "Problem expanding xz " + ioe.getMessage(); |
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throw new BuildException(msg, ioe, getLocation()); |
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} finally { |
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FileUtils.close(fis); |
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FileUtils.close(out); |
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FileUtils.close(zIn); |
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} |
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} |
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} |
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/** |
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* Whether this task can deal with non-file resources. |
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* |
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* <p>This implementation returns true only.</p> |
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* @return true |
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*/ |
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protected boolean supportsNonFileResources() { |
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return true; |
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} |
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} |
Stefan Bodewig
