content: /*******************************************************************************
   * 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.ui.refactoring.nls.search;
  
  import java.util.Set;
  
  import org.eclipse.core.runtime.Assert;
  
  
  
  class Properties extends java.util.Properties {
  	
  	private static final long serialVersionUID= 1L;
  	
  	private Set fDuplicateKeys;
  
  	public Properties() {
  	}
  	
  	public Properties(Set duplicateKeys) {
  		super();
  		Assert.isNotNull(duplicateKeys);
  		fDuplicateKeys= duplicateKeys;
  	}
  	
  	public Properties (Properties properties, Set duplicateKeys) {
  		super(properties);
  		Assert.isNotNull(duplicateKeys);
  		fDuplicateKeys= duplicateKeys;
  	}
  	/*
  	 * @see java.util.Map#put(Object, Object)
  	 */
  	public Object put(Object arg0, Object arg1) {
  		if (arg0 != null && containsKey(arg0))
  			fDuplicateKeys.add(arg0);
  		return super.put(arg0, arg1);
  	}
  }
  