taverna-edits-api/src/main/java/org/apache/taverna/workflow/edits/ClearIterationStrategyStackEdit.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.taverna.workflow.edits;

import org.apache.taverna.scufl2.api.iterationstrategy.IterationStrategyStack;

/**
 * Removes all the iteration strategies from an iteration strategy stack.
 * 
 * @author David Withers
 */
public class ClearIterationStrategyStackEdit extends
		AbstractEdit<IterationStrategyStack> {
	private IterationStrategyStack oldIterationStrategyStack;

	public ClearIterationStrategyStackEdit(
			IterationStrategyStack iterationStrategyStack) {
		super(iterationStrategyStack);
	}

	@Override
	protected void doEditAction(IterationStrategyStack iterationStrategyStack) {
		oldIterationStrategyStack = new IterationStrategyStack();
		oldIterationStrategyStack.addAll(iterationStrategyStack);
		iterationStrategyStack.clear();
	}

	@Override
	public void undoEditAction(IterationStrategyStack iterationStrategyStack) {
		iterationStrategyStack.addAll(oldIterationStrategyStack);
	}
}