| /* |
| * 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.sling.commons.osgi; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.util.jar.JarEntry; |
| import java.util.jar.JarInputStream; |
| import java.util.jar.JarOutputStream; |
| import java.util.jar.Manifest; |
| |
| /** |
| * The <code>BundleFileProcessor</code> can transform a bundle Manifest |
| * by creating a modified copy of the bundle file. |
| * @since 2.4 |
| */ |
| public abstract class BundleFileProcessor { |
| |
| private final File input; |
| private final File outputFolder; |
| |
| public BundleFileProcessor(File input, File outputFolder) { |
| this.input = input; |
| this.outputFolder = outputFolder; |
| } |
| |
| /** |
| * Process the bundle Manifest. Can return the original |
| * one if no changes are needed. |
| * @param originalManifest The manifest to process |
| * @return The processed manifest. |
| */ |
| protected abstract Manifest processManifest(Manifest originalManifest); |
| |
| /** |
| * Return the filename to use for the newly created bundle file |
| * @param inputJarManifest The manifest |
| * @return The filename |
| */ |
| protected abstract String getTargetFilename(Manifest inputJarManifest); |
| |
| /** |
| * Creates a new OSGi Bundle from a given bundle, processing its manifest |
| * using the processManifest method. |
| * @return The new bundle file |
| * @throws IOException If something goes wrong reading or writing. |
| */ |
| public File process() throws IOException { |
| JarInputStream jis = null; |
| try { |
| jis = new JarInputStream(new FileInputStream(input)); |
| Manifest oldMF = jis.getManifest(); |
| Manifest newMF = processManifest(oldMF); |
| File newBundle = new File(outputFolder, getTargetFilename(oldMF)); |
| |
| JarOutputStream jos = null; |
| try { |
| jos = new JarOutputStream(new FileOutputStream(newBundle), newMF); |
| JarEntry je = null; |
| while ((je = jis.getNextJarEntry()) != null) { |
| try { |
| jos.putNextEntry(je); |
| if (!je.isDirectory()) |
| pumpStream(jis, jos); |
| } finally { |
| jos.closeEntry(); |
| jis.closeEntry();; |
| } |
| } |
| } finally { |
| if(jos != null) { |
| jos.close(); |
| } |
| } |
| return newBundle; |
| } finally { |
| if(jis != null) { |
| jis.close(); |
| } |
| } |
| } |
| |
| static void pumpStream(InputStream is, OutputStream os) throws IOException { |
| byte[] bytes = new byte[65536]; |
| |
| int length = 0; |
| int offset = 0; |
| |
| while ((length = is.read(bytes, offset, bytes.length - offset)) != -1) { |
| offset += length; |
| |
| if (offset == bytes.length) { |
| os.write(bytes, 0, bytes.length); |
| offset = 0; |
| } |
| } |
| if (offset != 0) { |
| os.write(bytes, 0, offset); |
| } |
| } |
| } |