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/*******************************************************************************
* Copyright (c) 2007, 2018 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* 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();
}
@Override
protected OutputStream createIncomingStream() throws IOException {
incoming = File.createTempFile(INCOMING_ROOT, JAR_SUFFIX);
return new BufferedOutputStream(new FileOutputStream(incoming));
}
@Override
protected void cleanupTempFiles() {
super.cleanupTempFiles();
if (incoming != null)
incoming.delete();
}
@Override
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();
}
}
}
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