    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.analysis;
    019
    020    /**
    021     * An interface representing a multivariate real function.
    022     *
    023     * @version $Id: MultivariateFunction.java 1364387 2012-07-22 18:14:11Z tn $
    024     * @since 2.0
    025     */
    026    public interface MultivariateFunction {
    027
    028        /**
    029         * Compute the value for the function at the given point.
    030         *
    031         * @param point Point at which the function must be evaluated.
    032         * @return the function value for the given point.
    033         * @throws org.apache.commons.math3.exception.DimensionMismatchException
    034         * if the parameter's dimension is wrong for the function being evaluated.
    035         * @throws  org.apache.commons.math3.exception.MathIllegalArgumentException
    036         * when the activated method itself can ascertain that preconditions,
    037         * specified in the API expressed at the level of the activated method,
    038         * have been violated.  In the vast majority of cases where Commons Math
    039         * throws this exception, it is the result of argument checking of actual
    040         * parameters immediately passed to a method.
    041         */
    042        double value(double[] point);
    043    }