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/******************************************************************************
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 * contributors as indicated by the @authors tag. See the                     *
 * copyright.txt in the distribution for a full listing of                    *
 * individual contributors.                                                   *
 *                                                                            *
 * This is free software; you can redistribute it and/or modify it            *
 * under the terms of the GNU Lesser General Public License as                *
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU           *
 * Lesser General Public License for more details.                            *
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package org.gatein.common.util;

import java.util.List;
import java.util.Set;

/**
 * A property map with multi valued properties.
 *
 * @author Julien Viet
 * @version $Revision: 630 $
 */
public interface MultiValuedPropertyMap
{
   T getValue(String key) throws IllegalArgumentException;
   List getValues(String key) throws IllegalArgumentException;
   void addValue(String key, T value) throws IllegalArgumentException;
   void setValue(String key, T value) throws IllegalArgumentException;
   Set keySet();
   void clear();
   int size();
   void append(MultiValuedPropertyMap appended) throws IllegalArgumentException;
}