KeyedValue.java

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 * Mission Control Technologies, Copyright (c) 2009-2012, United States Government
 * as represented by the Administrator of the National Aeronautics and Space 
 * Administration. All rights reserved.
 *
 * The MCT platform is licensed under the Apache License, Version 2.0 (the 
 * "License"); you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License at 
 * http://www.apache.org/licenses/LICENSE-2.0.
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 * License for the specific language governing permissions and limitations under 
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package gov.nasa.arc.mct.table.model;

/**
 * Represents a value that can be looked up by a key.
 * 
 * @param <K> the type of the key
 * @param <V> the type of the value
 */
public abstract class KeyedValue<K,V> {

	/**
	 * Gets the key for this value.
	 * 
	 * @return the value's key
	 */
	public abstract K getKey();
	
	/**
	 * Gets a unique label identifying the value.
	 * 
	 * @return the identifier for the value
	 */
	public abstract String getIdentifier();
	
	/**
	 * Gets the value.
	 * 
	 * @return the value
	 */
	public abstract V getValue();
	
}