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/*******************************************************************************
* Copyright (c) 2011 Wind River Systems, Inc. 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.runtime.model.internal.factory;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.osgi.util.NLS;
import org.eclipse.tcf.te.runtime.activator.CoreBundleActivator;
import org.eclipse.tcf.te.runtime.extensions.ExecutableExtensionProxy;
import org.eclipse.tcf.te.runtime.model.interfaces.IModelNode;
import org.eclipse.tcf.te.runtime.model.interfaces.factory.IFactoryDelegate;
import org.eclipse.tcf.te.runtime.model.nls.Messages;
import org.osgi.framework.Bundle;
/**
* Model node factory delegate executable extension proxy implementation.
*/
public class FactoryDelegateProxy extends ExecutableExtensionProxy<IFactoryDelegate> {
// The list of node types supported by the model node factory delegate
private final List<Class<? extends IModelNode>> nodeTypes = new ArrayList<Class<? extends IModelNode>>();
// Flag to mark if the node types has been loaded
private boolean nodeTypesLoaded = false;
/**
* Constructor.
*
* @param element The configuration element. Must not be <code>null</code>.
* @throws CoreException In case the configuration element attribute <i>id</i> is <code>null</code> or empty.
*/
public FactoryDelegateProxy(IConfigurationElement element) throws CoreException {
super(element);
}
/**
* Constructor.
*
* @param id The id for this instance.
* @param instance The instance to add to proxy.
*/
public FactoryDelegateProxy(String id, IFactoryDelegate instance) {
super(id, instance);
}
/**
* Returns the list of node types supported by the model node factory.
*
* @return The unmodifiable list of node types.
*/
public List<Class<? extends IModelNode>> getNodeTypes() {
if (!nodeTypesLoaded) loadNodeTypes();
return Collections.unmodifiableList(nodeTypes);
}
/**
* Load the node types.
*/
protected void loadNodeTypes() {
IConfigurationElement element = getConfigurationElement();
Assert.isNotNull(element);
nodeTypes.clear();
IConfigurationElement[] nodeTypeElements = element.getChildren("nodeType"); //$NON-NLS-1$
if (nodeTypeElements != null && nodeTypeElements.length > 0) {
for (IConfigurationElement nodeTypeElement : nodeTypeElements) {
try {
String type = nodeTypeElement.getAttribute("class"); //$NON-NLS-1$
String bundleId = nodeTypeElement.getAttribute("bundleId"); //$NON-NLS-1$
// If a bundle id got specified, use the specified bundle to load the node type class
Bundle bundle = bundleId != null ? bundle = Platform.getBundle(bundleId) : null;
// If we don't have a bundle to load from yet, fallback to the declaring bundle
if (bundle == null) bundle = Platform.getBundle(element.getDeclaringExtension().getNamespaceIdentifier());
// And finally, use our own bundle to load the class.
// This fallback is expected to never be used.
if (bundle == null) bundle = CoreBundleActivator.getContext().getBundle();
// Try to load the node type class now.
Class<? extends IModelNode> typeClass = (Class<? extends IModelNode>)(bundle != null ? bundle.loadClass(type) : Class.forName(type));
this.nodeTypes.add(typeClass);
}
catch (Exception e) {
IStatus status = new Status(IStatus.WARNING, CoreBundleActivator.getUniqueIdentifier(),
NLS.bind(Messages.FactoryDelegateProxy_warning_failedToLoadNodeType, nodeTypeElement.getAttribute("class"), element.getDeclaringExtension().getUniqueIdentifier()), e); //$NON-NLS-1$
Platform.getLog(CoreBundleActivator.getContext().getBundle()).log(status);
}
}
}
nodeTypesLoaded = true;
}
}
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