/*******************************************************************************
 * Copyright (c) 2000, 2007 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.wst.jsdt.internal.corext.refactoring.code.flow;

class SwitchFlowInfo extends FlowInfo {
	private GenericConditionalFlowInfo fCases;
	private boolean fHasNullCaseInfo;
	
	public SwitchFlowInfo() {
		fCases= new GenericConditionalFlowInfo();
	}
	
	public void mergeTest(FlowInfo info, FlowContext context) {
		if (info == null)
			return;
		mergeSequential(info, context);
	}
	
	public void mergeCase(FlowInfo info, FlowContext context) {
		if (info == null) {
			fHasNullCaseInfo= true;
			return;
		}
		fCases.mergeConditional(info, context);
	}
	
	public void mergeDefault(boolean defaultCaseExists, FlowContext context) {
		if (!defaultCaseExists || fHasNullCaseInfo)
			fCases.mergeEmptyCondition(context);
		mergeSequential(fCases, context);
	}
}

