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 1435539 2013-01-19 13:27:24Z 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    }