/*******************************************************************************
 * Copyright (c) 2003, 2004 IBM Corporation 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:
 * IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jst.j2ee.internal.actions;


import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.SubProgressMonitor;
import org.eclipse.core.runtime.jobs.ISchedulingRule;
import org.eclipse.jface.operation.IRunnableWithProgress;

/**
 * An operation which delegates its work to a runnable that modifies the workspace.
 * <p>
 * This class may be instantiated; it is not intended to be subclassed.
 * </p>
 */
public class WorkspaceModifyComposedOperation extends org.eclipse.ui.actions.WorkspaceModifyOperation {
	protected List fRunnables;

	public WorkspaceModifyComposedOperation(ISchedulingRule rule) {
		super(rule);
	}

	/**
	 * Creates a new operation which will delegate its work to the given runnable.
	 */
	public WorkspaceModifyComposedOperation() {
		super();
	}

	public WorkspaceModifyComposedOperation(ISchedulingRule rule, List nestedRunnablesWithProgress) {
		super(rule);
		fRunnables = nestedRunnablesWithProgress;
	}

	public WorkspaceModifyComposedOperation(List nestedRunnablesWithProgress) {
		super();
		fRunnables = nestedRunnablesWithProgress;
	}

	/**
	 * Creates a new operation which will delegate its work to the given runnable.
	 * 
	 * @param content
	 *            the runnable to delegate to when this operation is executed
	 */
	public WorkspaceModifyComposedOperation(IRunnableWithProgress nestedOp) {
		super();
		getRunnables().add(nestedOp);
	}

	public boolean addRunnable(IRunnableWithProgress nestedOp) {
		return getRunnables().add(nestedOp);
	}

	protected void execute(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
		int size = fRunnables.size();
		monitor.beginTask("", size);//$NON-NLS-1$
		for (int i = 0; i < fRunnables.size(); i++) {
			IRunnableWithProgress op = (IRunnableWithProgress) fRunnables.get(i);
			op.run(new SubProgressMonitor(monitor, 1, SubProgressMonitor.PREPEND_MAIN_LABEL_TO_SUBTASK));
		}
	}

	protected List getRunnables() {
		if (fRunnables == null)
			fRunnables = new ArrayList(3);
		return fRunnables;
	}
}