LocalRemoteServiceRegistry.java

/*******************************************************************************
* Copyright (c) 2010 Composent, 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:
*   Composent, Inc. - initial API and implementation
******************************************************************************/
package org.eclipse.ecf.internal.provider.local.container;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.ecf.core.identity.ID;
import org.eclipse.ecf.core.identity.IDFactory;
import org.eclipse.ecf.core.sharedobject.SharedObjectInitException;
import org.eclipse.ecf.core.util.ECFException;
import org.eclipse.ecf.provider.remoteservice.generic.RegistrySharedObject;
import org.eclipse.ecf.provider.remoteservice.generic.RemoteServiceRegistrationImpl;
import org.eclipse.ecf.remoteservice.IRemoteCall;

public class LocalRemoteServiceRegistry extends RegistrySharedObject {

	public LocalRemoteServiceRegistry(LocalRemoteServiceContainer container) throws SharedObjectInitException {
		super();
		init(new LocalSharedObjectConfig(container, IDFactory.getDefault().createGUID()));
	}

	protected Object callSynch(RemoteServiceRegistrationImpl registration, IRemoteCall call) throws ECFException {
		try {
			Object service = registration.getService();
			if (service == null)
				throw new NullPointerException("Service is null for registration=" + registration.getReference().getID()); //$NON-NLS-1$
			// Lookup method on service object
			Class[] svcClasses = getClassesForService(service, (String[]) registration.getProperty(org.eclipse.ecf.remoteservice.Constants.OBJECTCLASS));
			if (svcClasses == null || svcClasses.length == 0)
				throw new NullPointerException("Service interface not found for registration=" + registration.getReference().getID()); //$NON-NLS-1$
			Method method = getMethodForService(call.getMethod(), svcClasses);
			if (method == null)
				throw new NullPointerException("Method " + call.getMethod() + " not found for registration=" + registration.getReference().getID()); //$NON-NLS-1$ //$NON-NLS-2$
			return method.invoke(service, call.getParameters());
		} catch (Exception e) {
			throw new ECFException("Exception invoking local service registration=" + registration.getReference().getID(), e); //$NON-NLS-1$
		}
	}

	private Method getMethodForService(String method, Class[] svcClasses) {
		for (int i = 0; i < svcClasses.length; i++) {
			Method[] methods = svcClasses[i].getDeclaredMethods();
			if (methods == null)
				return null;
			for (int j = 0; j < methods.length; j++) {
				if (method.equals(methods[j].getName()))
					return methods[j];
			}
		}
		return null;
	}

	private Class[] getClassesForService(Object service, String[] svcInterfaces) {
		Class[] classes = service.getClass().getInterfaces();
		List results = new ArrayList();
		for (int i = 0; i < classes.length; i++) {
			for (int j = 0; j < svcInterfaces.length; j++) {
				if (classes[i].getName().equals(svcInterfaces[j])) {
					results.add(classes[i]);
				}
			}
		}
		return (Class[]) results.toArray(new Class[] {});
	}

	protected void sendAddRegistration(ID receiver, Integer requestId, RemoteServiceRegistrationImpl reg) {
		// do nothing
	}

	protected void sendUnregister(RemoteServiceRegistrationImpl serviceRegistration) {
		// do nothing
	}
}