ingo@1115: /*
ingo@1115:  * Copyright (c) 2010 by Intevation GmbH
ingo@1115:  *
ingo@1115:  * This program is free software under the LGPL (>=v2.1)
ingo@1115:  * Read the file LGPL.txt coming with the software for details
ingo@1115:  * or visit http://www.gnu.org/licenses/ if it does not exist.
ingo@1115:  */
ingo@1115: 
sascha@433: package de.intevation.gnv.math;
sascha@433: 
sascha@433: import org.apache.commons.math.analysis.UnivariateRealFunction;
sascha@433: 
sascha@433: /**
sascha@807:  * Models a constant function to be used in function evaluation.
sascha@807:  *
sascha@780:  * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
sascha@433:  */
sascha@433: public class ConstantFunction
sascha@433: implements   UnivariateRealFunction
sascha@433: {
sascha@807:     /**
sascha@807:      * The constant value.
sascha@807:      */
sascha@433:     protected double value;
sascha@778: 
sascha@807:     /**
sascha@807:      * Defaut constructor.
sascha@807:      */
sascha@433:     public ConstantFunction() {
sascha@433:     }
sascha@433: 
sascha@807:     /**
sascha@807:      * Constructor to create a ConstantFunction with
sascha@807:      * a given constant value.
sascha@807:      * @param value The constant value.
sascha@807:      */
sascha@433:     public ConstantFunction(double value) {
sascha@433:         this.value = value;
sascha@433:     }
sascha@433: 
sascha@433:     public double value(double x) {
sascha@433:         return value;
sascha@433:     }
sascha@433: }
sascha@798: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :