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Relational Persistence for Java

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//$Id: NonUniqueObjectException.java 5685 2005-02-12 07:19:50Z steveebersole $
package org.hibernate;

import java.io.Serializable;

import org.hibernate.pretty.MessageHelper;

/**
 * This exception is thrown when an operation would
 * break session-scoped identity. This occurs if the
 * user tries to associate two different instances of
 * the same Java class with a particular identifier,
 * in the scope of a single Session.
 *
 * @author Gavin King
 */
public class NonUniqueObjectException extends HibernateException {
	private final Serializable identifier;
	private final String entityName;

	public NonUniqueObjectException(String message, Serializable id, String clazz) {
		super(message);
		this.entityName = clazz;
		this.identifier = id;
	}

	public NonUniqueObjectException(Serializable id, String clazz) {
		this("a different object with the same identifier value was already associated with the session", id, clazz);
	}

	public Serializable getIdentifier() {
		return identifier;
	}

	public String getMessage() {
		return super.getMessage() + ": " +
			MessageHelper.infoString(entityName, identifier);
	}

	public String getEntityName() {
		return entityName;
	}

}