Bug 152430 Key can modify to empty string
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/PropertyMaskHandle.java
/*******************************************************************************
 * Copyright (c) 2004 Actuate Corporation.
 * 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:
 *  Actuate Corporation  - initial API and implementation
 *******************************************************************************/
package org.eclipse.birt.report.model.api;
import org.eclipse.birt.report.model.api.activity.SemanticException;
import org.eclipse.birt.report.model.api.elements.structures.PropertyMask;
/**
 * Represents the handle of property mask structure. The property mask defines
 * whether this property can be accessed or modified. It includes property name
 * and mask value.
 */
public class PropertyMaskHandle extends StructureHandle
{
	/**
	 * Constructs the handle of property mask.
	 * 
	 * @param valueHandle
	 *            the value handle for property mask list of one property