svn-gvsig-desktop / trunk / extensions / extSymbology / src / org / gvsig / symbology / fmap / rendering / filter / operations / DoubleConstant.java @ 22254
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/* gvSIG. Sistema de Informaci�n Geogr�fica de la Generalitat Valenciana
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*
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* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib��ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*/
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package org.gvsig.symbology.fmap.rendering.filter.operations; |
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import java.util.ArrayList; |
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import java.util.Hashtable; |
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import com.hardcode.gdbms.engine.values.Value; |
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import com.iver.cit.gvsig.fmap.Messages; |
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/**
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* Implements the funcionality of a double constant
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*
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* @author Pepe Vidal Salvador - jose.vidal.salvador@iver.es
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*
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*/
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public class DoubleConstant implements Expression { |
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private double value; |
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public String getName() { |
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return OperationTags.NUMERIC_VALUE;
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} |
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public DoubleConstant(String value) { |
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this.value=Double.valueOf(value); |
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} |
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public DoubleConstant(String string, String value) { |
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this.value = Double.valueOf(value); |
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if (string.compareTo("-1*") == 0) |
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this.value = new Double(-1 * this.value); |
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} |
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public Object evaluate(Hashtable<String, Value> symbol_table) { |
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return value;
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} |
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public String getDescription() { |
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return Messages.getString("constant"); |
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} |
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public Class getResultType() { |
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return Double.class; |
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} |
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public void addArguments(ArrayList<Expression> expressions) { |
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throw new RuntimeException("Cannot add arguments to a constant"); |
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} |
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public void addArgument(int i, Expression arg) { |
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throw new RuntimeException("Cannot add arguments to a constant"); |
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} |
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public String getPattern() { |
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return null; |
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} |
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public ArrayList<Expression> getArguments() { |
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return null; |
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} |
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public void setArguments(ArrayList<Expression> arguments) { |
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return;
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} |
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public void check(Hashtable<String, Value> symbol_table) throws ExpressionException { |
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return;
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} |
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public double getValue() { |
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return value;
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} |
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} |