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/*******************************************************************************
* Copyright (c) 2009, 2010 Tasktop Technologies 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:
* Tasktop Technologies - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.internal.p2.discovery.compatibility;
import org.eclipse.core.runtime.*;
import org.eclipse.equinox.internal.p2.core.helpers.LogHelper;
import org.eclipse.equinox.internal.p2.discovery.*;
import org.eclipse.equinox.internal.p2.discovery.model.*;
import org.eclipse.osgi.util.NLS;
import org.osgi.framework.Bundle;
/**
* A strategy for discovering via installed platform {@link Bundle bundles}.
*
* @author David Green
*/
public class BundleDiscoveryStrategy extends AbstractDiscoveryStrategy {
public BundleDiscoveryStrategy() {
// constructor
}
@SuppressWarnings("unused")
@Override
public void performDiscovery(IProgressMonitor monitor) throws CoreException {
if (items == null || categories == null) {
throw new IllegalStateException();
}
IExtensionPoint extensionPoint = getExtensionRegistry().getExtensionPoint(ConnectorDiscoveryExtensionReader.EXTENSION_POINT_ID);
IExtension[] extensions = extensionPoint.getExtensions();
monitor.beginTask(Messages.BundleDiscoveryStrategy_task_loading_local_extensions, extensions.length == 0 ? 1 : extensions.length);
try {
if (extensions.length > 0) {
processExtensions(new SubProgressMonitor(monitor, extensions.length), extensions);
}
} finally {
monitor.done();
}
}
protected void processExtensions(IProgressMonitor monitor, IExtension[] extensions) {
monitor.beginTask(Messages.BundleDiscoveryStrategy_task_processing_extensions, extensions.length == 0 ? 1 : extensions.length);
try {
ConnectorDiscoveryExtensionReader extensionReader = new ConnectorDiscoveryExtensionReader();
for (IExtension extension : extensions) {
AbstractCatalogSource discoverySource = computeDiscoverySource(extension.getContributor());
IConfigurationElement[] elements = extension.getConfigurationElements();
for (IConfigurationElement element : elements) {
if (monitor.isCanceled()) {
return;
}
try {
if (ConnectorDiscoveryExtensionReader.CONNECTOR_DESCRIPTOR.equals(element.getName())) {
CatalogItem descriptor = extensionReader.readConnectorDescriptor(element, CatalogItem.class);
descriptor.setSource(discoverySource);
items.add(descriptor);
} else if (ConnectorDiscoveryExtensionReader.CONNECTOR_CATEGORY.equals(element.getName())) {
CatalogCategory category = extensionReader.readConnectorCategory(element, CatalogCategory.class);
category.setSource(discoverySource);
if (!discoverySource.getPolicy().isPermitCategories()) {
LogHelper.log(new Status(IStatus.ERROR, DiscoveryCore.ID_PLUGIN, NLS.bind(Messages.BundleDiscoveryStrategy_categoryDisallowed, new Object[] {category.getName(), category.getId(), element.getContributor().getName()}), null));
} else {
categories.add(category);
}
} else if (ConnectorDiscoveryExtensionReader.CERTIFICATION.equals(element.getName())) {
Certification certification = extensionReader.readCertification(element, Certification.class);
certification.setSource(discoverySource);
certifications.add(certification);
} else {
throw new ValidationException(NLS.bind(Messages.BundleDiscoveryStrategy_unexpected_element, element.getName()));
}
} catch (ValidationException e) {
LogHelper.log(new Status(IStatus.ERROR, DiscoveryCore.ID_PLUGIN, NLS.bind(Messages.BundleDiscoveryStrategy_3, element.getContributor().getName(), e.getMessage()), e));
}
}
monitor.worked(1);
}
tags.addAll(extensionReader.getTags());
} finally {
monitor.done();
}
}
protected AbstractCatalogSource computeDiscoverySource(IContributor contributor) {
Policy policy = new Policy(true);
BundleDiscoverySource bundleDiscoverySource = new BundleDiscoverySource(Platform.getBundle(contributor.getName()));
bundleDiscoverySource.setPolicy(policy);
return bundleDiscoverySource;
}
protected IExtensionRegistry getExtensionRegistry() {
return Platform.getExtensionRegistry();
}
}
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