| /******************************************************************************* |
| * Copyright (c) 2007, 2010 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.equinox.internal.p2.artifact.processors.jardelta; |
| |
| import java.io.*; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.equinox.internal.p2.artifact.processors.AbstractDeltaProcessorStep; |
| import org.eclipse.equinox.internal.p2.artifact.processors.Activator; |
| import org.eclipse.equinox.internal.p2.core.helpers.FileUtils; |
| import org.eclipse.equinox.p2.repository.artifact.spi.ArtifactDescriptor; |
| |
| /** |
| * Processor that takes a JAR delta and applies it. |
| */ |
| public class JarDeltaProcessorStep extends AbstractDeltaProcessorStep { |
| |
| private File incoming; |
| |
| public JarDeltaProcessorStep() { |
| super(); |
| } |
| |
| protected OutputStream createIncomingStream() throws IOException { |
| incoming = File.createTempFile(INCOMING_ROOT, JAR_SUFFIX); |
| return new BufferedOutputStream(new FileOutputStream(incoming)); |
| } |
| |
| protected void cleanupTempFiles() { |
| super.cleanupTempFiles(); |
| if (incoming != null) |
| incoming.delete(); |
| } |
| |
| protected void performProcessing() throws IOException { |
| File resultFile = null; |
| try { |
| resultFile = process(); |
| // now write the optimized content to the destination |
| if (resultFile.length() > 0) { |
| InputStream resultStream = new BufferedInputStream(new FileInputStream(resultFile)); |
| FileUtils.copyStream(resultStream, true, getDestination(), false); |
| } else { |
| setStatus(new Status(IStatus.ERROR, Activator.ID, "Empty optimized file: " + resultFile)); //$NON-NLS-1$ |
| } |
| } finally { |
| if (resultFile != null) |
| resultFile.delete(); |
| } |
| } |
| |
| protected File process() throws IOException { |
| File predecessor = null; |
| try { |
| File resultFile = File.createTempFile(RESULT_ROOT, JAR_SUFFIX); |
| // get the predecessor and perform the optimization into a temp file |
| predecessor = fetchPredecessor(new ArtifactDescriptor(key)); |
| new DeltaApplier(predecessor, incoming, resultFile).run(); |
| return resultFile; |
| } finally { |
| // if we have a predecessor and it is our temp file then clean up the file |
| if (predecessor != null && predecessor.getAbsolutePath().indexOf(PREDECESSOR_ROOT) > -1) |
| predecessor.delete(); |
| } |
| } |
| } |