    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    package org.apache.commons.math.exception;
    018
    019    import org.apache.commons.math.exception.util.Localizable;
    020    import org.apache.commons.math.exception.util.LocalizedFormats;
    021
    022    /**
    023     * All conditions checks that fail due to a {@code null} argument must throw
    024     * this exception.
    025     * This class is meant to signal a precondition violation ("null is an illegal
    026     * argument") and so does not extend the standard {@code NullPointerException}.
    027     * Proagation of {@code NullPointerException} from within Commons-Math is
    028     * construed to be a bug.
    029     *
    030     * @since 2.2
    031     * @version $Revision$ $Date$
    032     */
    033    public class NullArgumentException extends MathIllegalArgumentException {
    034        /** Serializable version Id. */
    035        private static final long serialVersionUID = -6024911025449780478L;
    036
    037        /**
    038         * Default constructor.
    039         */
    040        public NullArgumentException() {
    041            super(LocalizedFormats.NULL_NOT_ALLOWED);
    042        }
    043        /**
    044         * @param specific Message pattern providing the specific context of
    045         * the error.
    046         */
    047        public NullArgumentException(Localizable specific) {
    048            super(specific, LocalizedFormats.NULL_NOT_ALLOWED);
    049        }
    050    }