Bug 152430 Key can modify to empty string
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/SelectionChoiceHandle.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.elements.structures.SelectionChoice;
/**
 * Represents the handle of selection choice. The selection choice is the value
 * and label pair for parameter.
 * 
 * <dl>
 * <dt><strong>Value </strong></dt>
 * <dd>the data value for this choice. The value string is interpreted base on
 * the parameter data type.
 * 
 * <dt><strong>Label </strong></dt>
 * <dd>a optional label to display for this value.
 * 
 * <dt><strong>Label Resource Key </strong></dt>
 * <dd>a optional label resource key when localiztion is needed.
 * </dl>
 */
public class SelectionChoiceHandle extends StructureHandle