OrderedCallHooksExecuter.java

/*******************************************************************************
 * Copyright (c) 2007, 2014 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 - initial API and implementation
 *******************************************************************************/
package org.eclipse.riena.internal.communication.core.factory;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.riena.communication.core.hooks.CallContext;
import org.eclipse.riena.communication.core.hooks.ICallHook;
import org.eclipse.riena.core.util.Iter;
import org.eclipse.riena.core.util.Orderer;
import org.eclipse.riena.core.wire.InjectExtension;

/**
 * A {@link ICallHook} that executes the �ordered� call hooks.
 */
public class OrderedCallHooksExecuter implements ICallHook {

	private List<ICallHook> orderedCallHooks;
	private List<ICallHook> reversedCallHooks;

	public void beforeCall(final CallContext context) {
		for (final ICallHook sHook : orderedCallHooks) {
			sHook.beforeCall(context);
		}
	}

	public void afterCall(final CallContext context) {
		for (final ICallHook sHook : reversedCallHooks) {
			sHook.afterCall(context);
		}
	}

	@InjectExtension
	public void update(final ICallHookExtension[] callHookExtensions) {
		final Orderer<ICallHook> orderer = new Orderer<ICallHook>();
		for (final ICallHookExtension extension : callHookExtensions) {
			orderer.add(extension.getCallHook(), extension.getName(), extension.getPreHooks(), extension.getPostHooks());
		}
		final List<ICallHook> tempOrdered = orderer.getOrderedObjects();
		final List<ICallHook> tempReverse = new ArrayList<ICallHook>(tempOrdered.size());
		for (final ICallHook hook : Iter.ableReverse(tempOrdered)) {
			tempReverse.add(hook);
		}
		synchronized (this) {
			this.orderedCallHooks = tempOrdered;
			this.reversedCallHooks = tempReverse;
		}
	}

}