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Cane is based on the coding behaviour analysis of data manipulation interface to allow coders are close to their habit of thinking of ways to manipulate the data. API definition for Cane.

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/**
 * Copyright 2011 CaneData.org
 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.canedata.exception;

/**
 * 
 * @author Yat-ton
 * @version 1.00.000 2011-5-1
 */
public class KeyExistsException extends RuntimeException {
	private String entityName;
	private String key;
	
	/**
	 * 
	 */
	private static final long serialVersionUID = -1296985323202231425L;

	/**
	 * 
	 */
	public KeyExistsException(String entityName, String key) {
		super("Primary key [" + entityName + "#" + key + "] already exists.");
		
		this.entityName = entityName;
		this.key = key;
		
		
	}

	/**
	 * @param arg0
	 */
	public KeyExistsException(String arg0) {
		super(arg0);
	}

	/**
	 * @param arg0
	 */
	public KeyExistsException(Throwable arg0) {
		super(arg0);
	}

	/**
	 * @param arg0
	 * @param arg1
	 */
	public KeyExistsException(String arg0, Throwable arg1) {
		super(arg0, arg1);
	}
	
	public String getTarget(){
		return entityName + "#" + key;
	}
}