    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.math3.linear;
    019
    020    import org.apache.commons.math3.exception.MathIllegalArgumentException;
    021    import org.apache.commons.math3.exception.util.LocalizedFormats;
    022
    023    /**
    024     * Exception to be thrown when a symmetric, definite positive
    025     * {@link RealLinearOperator} is expected.
    026     * Since the coefficients of the matrix are not accessible, the most
    027     * general definition is used to check that {@code A} is not positive
    028     * definite, i.e.  there exists {@code x} such that {@code x' A x <= 0}.
    029     * In the terminology of this exception, {@code A} is the "offending"
    030     * linear operator and {@code x} the "offending" vector.
    031     *
    032     * @version $Id: NonPositiveDefiniteOperatorException.java 1416643 2012-12-03 19:37:14Z tn $
    033     * @since 3.0
    034     */
    035    public class NonPositiveDefiniteOperatorException
    036        extends MathIllegalArgumentException {
    037        /** Serializable version Id. */
    038        private static final long serialVersionUID = 917034489420549847L;
    039
    040        /** Creates a new instance of this class. */
    041        public NonPositiveDefiniteOperatorException() {
    042            super(LocalizedFormats.NON_POSITIVE_DEFINITE_OPERATOR);
    043        }
    044    }