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/*******************************************************************************
* Copyright (c) 2007 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
*******************************************************************************/
package org.eclipse.equinox.internal.p2.artifact.processors.jbdiff;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.equinox.internal.p2.core.helpers.ServiceHelper;
import org.eclipse.equinox.p2.artifact.processors.Activator;
import org.eclipse.equinox.p2.artifact.repository.*;
import org.eclipse.equinox.p2.artifact.repository.processing.ProcessingStep;
import org.eclipse.equinox.p2.artifact.repository.processing.ProcessingStepDescriptor;
import org.eclipse.equinox.p2.metadata.IArtifactKey;
/**
* The <code>AbstractDeltaPatchStep</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>ArtifactKeyDeserializerXXX</code>.
*/
public abstract class AbstractDeltaPatchStep extends ProcessingStep {
protected IArtifactKey key;
protected IArtifactRepository repository;
/* (non-Javadoc)
* @see org.eclipse.equinox.p2.artifact.repository.processing.ProcessingStep#initialize(org.eclipse.equinox.p2.artifact.repository.processing.ProcessingStepDescriptor, org.eclipse.equinox.p2.artifact.repository.IArtifactDescriptor)
*/
public void initialize(ProcessingStepDescriptor descriptor, IArtifactDescriptor context) {
super.initialize(descriptor, context);
fetchArtifactKey(descriptor);
if (!status.isOK())
return;
fetchLocalArtifactRepository();
}
/**
* Fetch the artifact key from the given processing step descriptor.
* @param descriptor
*/
private void fetchArtifactKey(ProcessingStepDescriptor descriptor) {
try {
key = ArtifactKeyDeSerializer.deserialize(descriptor.getData());
} catch (IllegalArgumentException e) {
status = new Status(IStatus.ERROR, Activator.ID, "Predecessor artifact key for delta could not be deserialized. Serialized key is " + descriptor.getData(), e);
}
}
/**
* Fetch a local artifact repository containing the fetched artifact key.
*/
private void fetchLocalArtifactRepository() {
IArtifactRepositoryManager repoMgr = (IArtifactRepositoryManager) ServiceHelper.getService(Activator.getContext(), IArtifactRepositoryManager.class.getName());
if (repoMgr == null) {
status = new Status(IStatus.ERROR, Activator.ID, "Could not get artifact repository manager.");
return;
}
IArtifactRepository[] repositories = repoMgr.getKnownRepositories();
for (int i = 0; i < repositories.length; i++) {
if ("file".equals(repositories[i].getLocation().getProtocol()) && repositories[i].contains(key)) {
repository = repositories[i];
return;
}
}
status = new Status(IStatus.ERROR, Activator.ID, "No repository available containing key " + key);
}
}
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