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/*******************************************************************************
* Copyright (c) 2007, 2018 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 - ongoing development
*******************************************************************************/
package org.eclipse.equinox.internal.p2.artifact.optimizers;
import java.io.*;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.equinox.internal.p2.artifact.processing.AbstractBufferingStep;
import org.eclipse.equinox.internal.p2.metadata.ArtifactKey;
import org.eclipse.equinox.p2.core.IProvisioningAgent;
import org.eclipse.equinox.p2.metadata.IArtifactKey;
import org.eclipse.equinox.p2.repository.artifact.*;
import org.eclipse.equinox.p2.repository.artifact.spi.ArtifactDescriptor;
/**
* The <code>AbstractDeltaDiffStep</code> is an abstract processing step that
* retrieves a local artifact repository containing the serialized/encoded
* artifact key. It assumes that the artifact key is stored within the data
* property of the processing step descriptor and that is encoded with the
* <code>ArtifactKeySerializer</code>.
*/
public abstract class AbstractDeltaStep extends AbstractBufferingStep {
protected IArtifactKey key;
protected IArtifactRepository repository;
public AbstractDeltaStep() {
this(null);
}
protected AbstractDeltaStep(IArtifactRepository repository) {
super();
this.repository = repository;
}
@Override
public void initialize(IProvisioningAgent agent, IProcessingStepDescriptor descriptor,
IArtifactDescriptor context) {
super.initialize(agent, descriptor, context);
readArtifactKey(descriptor);
}
protected void readArtifactKey(IProcessingStepDescriptor descriptor) {
try {
key = ArtifactKey.parse(descriptor.getData());
} catch (IllegalArgumentException e) {
setStatus(new Status(IStatus.ERROR, Activator.ID,
"Predecessor artifact key for delta could not be deserialized. Serialized key is "
+ descriptor.getData(),
e));
}
}
protected File fetchPredecessor(ArtifactDescriptor descriptor) {
if (repository instanceof IFileArtifactRepository)
return ((IFileArtifactRepository) repository).getArtifactFile(descriptor);
File result = null;
try {
result = File.createTempFile(PREDECESSOR_ROOT, JAR_SUFFIX);
try (OutputStream resultStream = new BufferedOutputStream(new FileOutputStream(result));) {
setStatus(repository.getArtifact(descriptor, resultStream, getProgressMonitor()));
return result;
}
} catch (IOException e) {
}
return null;
}
}
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