blob: 5a4a4ea17b0c3fd1c106c4e7db77d999da9da693 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/*******************************************************************************
* Copyright (c) 2007, 2010 compeople AG 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:
* compeople AG (Stefan Liebig) - initial API and implementation
* IBM Corporation - ongoing development
*******************************************************************************/
package org.eclipse.equinox.internal.p2.artifact.processors.jbdiff;
import ie.wombat.jbdiff.JBPatch;
import java.io.*;
import org.eclipse.equinox.internal.p2.artifact.processors.AbstractDeltaProcessorStep;
import org.eclipse.equinox.internal.p2.core.helpers.FileUtils;
import org.eclipse.equinox.internal.p2.sar.DirectByteArrayOutputStream;
import org.eclipse.equinox.p2.repository.artifact.spi.ArtifactDescriptor;
/**
* The JBPatchStep patches a JBDiff based data.
*/
public class JBPatchStep extends AbstractDeltaProcessorStep {
public JBPatchStep() {
super();
}
protected OutputStream createIncomingStream() throws IOException {
return new DirectByteArrayOutputStream();
}
protected void performProcessing() throws IOException {
DirectByteArrayOutputStream predecessor = fetchPredecessorBytes(new ArtifactDescriptor(key));
DirectByteArrayOutputStream current = (DirectByteArrayOutputStream) incomingStream;
byte[] result = JBPatch.bspatch(predecessor.getBuffer(), predecessor.getBufferLength(), current.getBuffer(), current.getBufferLength());
// free up the memory as soon as possible.
predecessor = null;
current = null;
incomingStream = null;
// copy the result of the optimization to the destination.
FileUtils.copyStream(new ByteArrayInputStream(result), true, getDestination(), false);
}
private DirectByteArrayOutputStream fetchPredecessorBytes(ArtifactDescriptor artifactDescriptor) throws IOException {
DirectByteArrayOutputStream result = new DirectByteArrayOutputStream();
setStatus(repository.getArtifact(artifactDescriptor, result, getProgressMonitor()));
if (!getStatus().isOK())
throw (IOException) new IOException(getStatus().getMessage()).initCause(getStatus().getException());
return result;
}
}
|
