plugins/org.eclipse.dltk.javascript.core.manipulation/src/org/eclipse/dltk/internal/javascript/corext/refactoring/code/flow/SwitchFlowInfo.java

/*******************************************************************************
 * Copyright (c) 2000, 2008 IBM Corporation and others.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 * 
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.dltk.internal.javascript.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);
	}
}