    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.math3.optim.nonlinear.vector;
    018
    019    import org.apache.commons.math3.optim.OptimizationData;
    020
    021    /**
    022     * Target of the optimization procedure.
    023     * They are the values which the objective vector function must reproduce
    024     * When the parameters of the model have been optimized.
    025     * <br/>
    026     * Immutable class.
    027     *
    028     * @version $Id: Target.java 1416643 2012-12-03 19:37:14Z tn $
    029     * @since 3.1
    030     */
    031    public class Target implements OptimizationData {
    032        /** Target values (of the objective vector function). */
    033        private final double[] target;
    034
    035        /**
    036         * @param observations Target values.
    037         */
    038        public Target(double[] observations) {
    039            target = observations.clone();
    040        }
    041
    042        /**
    043         * Gets the initial guess.
    044         *
    045         * @return the initial guess.
    046         */
    047        public double[] getTarget() {
    048            return target.clone();
    049        }
    050    }