001    /*
002     * Copyright 2005 Stephen J. McConnell
003     *
004     * Licensed  under the  Apache License,  Version 2.0  (the "License");
005     * you may not use  this file  except in  compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     *   http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed  under the  License is distributed on an "AS IS" BASIS,
012     * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY KIND, either  express  or
013     * implied.
014     *
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package net.dpml.library;
020    
021    /**
022     * A ReferentialException is thrown when a requested change would result
023     * in the creation of a referential integrity issue within a model (such 
024     * as the removal of a resource referenced by another resource).
025     *
026     * @author <a href="http://www.dpml.net">The Digital Product Meta Library</a>
027     * @version 1.0.0
028     */
029    public final class ReferentialException extends Exception
030    {
031       /**
032        * Creation of a new ReferentialException.
033        * @param message the exception message
034        */
035        public ReferentialException( String message )
036        {
037            this( message, null );
038        }
039        
040       /**
041        * Creation of a new ReferentialException.
042        * @param message the exception message
043        * @param cause the causal excetion
044        */
045        public ReferentialException( String message, Throwable cause )
046        {
047            super( message, cause );
048        }
049    }