PubSubAdapterFactory.java

/**
 * Copyright (c) 2006 Ecliptical Software 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:
 *     Ecliptical Software Inc. - initial API and implementation
 */
package org.eclipse.ecf.pubsub.impl;

import org.eclipse.core.runtime.IAdapterFactory;
import org.eclipse.ecf.core.identity.ID;
import org.eclipse.ecf.core.identity.IDFactory;
import org.eclipse.ecf.core.identity.IDCreateException;
import org.eclipse.ecf.core.sharedobject.ISharedObjectContainer;
import org.eclipse.ecf.core.sharedobject.ISharedObjectManager;
import org.eclipse.ecf.core.sharedobject.SharedObjectCreateException;
import org.eclipse.ecf.core.sharedobject.SharedObjectDescription;
import org.eclipse.ecf.pubsub.IPublishedServiceDirectory;
import org.eclipse.ecf.pubsub.IPublishedServiceRequestor;

public class PubSubAdapterFactory implements IAdapterFactory {
	
	private static final Class[] ADAPTERS = { IPublishedServiceDirectory.class, IPublishedServiceRequestor.class };

	public Object getAdapter(Object adaptableObject, Class adapterType) {
		if (!(adaptableObject instanceof ISharedObjectContainer))
			return null;
		
		if (IPublishedServiceDirectory.class.isAssignableFrom(adapterType))
			return getDirectory((ISharedObjectContainer) adaptableObject);

		if (IPublishedServiceRequestor.class.isAssignableFrom(adapterType))
			return getRequestor((ISharedObjectContainer) adaptableObject);
		
		return null;
	}
	
	protected IPublishedServiceDirectory getDirectory(ISharedObjectContainer container) {
		ID directoryID;
		try {
			directoryID = IDFactory.getDefault().createStringID(PublishedServiceDirectory.SHARED_OBJECT_ID);
		} catch (IDCreateException e) {
			throw new RuntimeException(e);
		}
		
		final ISharedObjectManager mgr = container.getSharedObjectManager();
		IPublishedServiceDirectory directory = (IPublishedServiceDirectory) mgr.getSharedObject(directoryID);
		if (directory != null)
			return directory;
		
		try {
			SharedObjectDescription desc = createDirectoryDescription(directoryID);
			mgr.createSharedObject(desc);
			return (IPublishedServiceDirectory) mgr.getSharedObject(directoryID);
		} catch (SharedObjectCreateException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return null;
		}
	}
	
	protected SharedObjectDescription createDirectoryDescription(ID directoryID) {
		return new SharedObjectDescription(PublishedServiceDirectory.class, directoryID, null);
	}
	
	protected IPublishedServiceRequestor getRequestor(ISharedObjectContainer container) {
		return new ServiceRequestor(container.getSharedObjectManager());
	}

	public Class[] getAdapterList() {
		return ADAPTERS;
	}
}