001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    
018    package org.apache.commons.math.linear;
019    
020    import org.apache.commons.math.MathException;
021    
022    /** 
023     * This class represents exceptions thrown when a matrix expected to
024     * be positive definite is not.
025     * 
026     * @since 1.2
027     * @version $Revision: 799857 $ $Date: 2009-08-01 09:07:12 -0400 (Sat, 01 Aug 2009) $
028     */
029    
030    public class NotPositiveDefiniteMatrixException extends MathException {
031    
032        /** Serializable version identifier */
033        private static final long serialVersionUID = 4122929125438624648L;
034    
035        /** Simple constructor.
036         * build an exception with a default message.
037         */
038        public NotPositiveDefiniteMatrixException() {
039            super("not positive definite matrix");
040        }
041    
042    }