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/*
 * Copyright 2002-2005 the original author or authors.
 * 
 * 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.springframework.orm;

import org.springframework.dao.DataRetrievalFailureException;

/**
 * Exception thrown if a mapped object could not be retrieved via its identifier.
 * Provides information about the persistent class and the identifier. 
 * @author Juergen Hoeller
 * @since 13.10.2003
 */
public class ObjectRetrievalFailureException extends DataRetrievalFailureException {

	private Object persistentClass;

	private Object identifier;

	/**
	 * Create a new ObjectRetrievalFailureException for the given object,
	 * with the default "not found" message.
	 * @param persistentClass the persistent class
	 * @param identifier the ID of the object that should have been retrieved
	 */
	public ObjectRetrievalFailureException(Class persistentClass, Object identifier) {
		this(persistentClass, identifier,
				"Object of class [" + persistentClass.getName() + "] with identifier [" + identifier + "]: not found",
				null);
	}

	/**
	 * Create a new ObjectRetrievalFailureException for the given object,
	 * with the given explicit message and exception.
	 * @param persistentClass the persistent class
	 * @param identifier the ID of the object that should have been retrieved
	 * @param msg exception message
	 * @param ex source exception
	 */
	public ObjectRetrievalFailureException(
			Class persistentClass, Object identifier, String msg, Throwable ex) {
		super(msg, ex);
		this.persistentClass = persistentClass;
		this.identifier = identifier;
	}

	/**
	 * Create a new ObjectRetrievalFailureException for the given object,
	 * with the default "not found" message.
	 * @param persistentClassName the name of the persistent class
	 * @param identifier the ID of the object that should have been retrieved
	 */
	public ObjectRetrievalFailureException(String persistentClassName, Object identifier) {
		this(persistentClassName, identifier,
				"Object of class [" + persistentClassName + "] with identifier [" + identifier + "]: not found",
				null);
	}

	/**
	 * Create a new ObjectRetrievalFailureException for the given object,
	 * with the given explicit message and exception.
	 * @param persistentClassName the name of the persistent class
	 * @param identifier the ID of the object that should have been retrieved
	 * @param msg exception message
	 * @param ex source exception
	 */
	public ObjectRetrievalFailureException(
			String persistentClassName, Object identifier, String msg, Throwable ex) {
		super(msg, ex);
		this.persistentClass = persistentClassName;
		this.identifier = identifier;
	}

	/**
	 * Return the persistent class of the object that was not found.
	 * If no Class was specified, this method returns null.
	 */
	public Class getPersistentClass() {
		return (this.persistentClass instanceof Class ? (Class) this.persistentClass : null);
	}

	/**
	 * Return the name of the persistent class of the object that was not found.
	 * Will work for both Class objects and String names.
	 */
	public String getPersistentClassName() {
		return (this.persistentClass instanceof Class ?
				((Class) this.persistentClass).getName() : this.persistentClass.toString());
	}

	/**
	 * Return the identifier of the object that was not found.
	 */
	public Object getIdentifier() {
		return identifier;
	}

}