root / trunk / extensions / extSymbology / src / org / gvsig / symbology / fmap / rendering / filter / operations / NumericalConstant.java @ 22501
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1 | 22187 | jdominguez | /* gvSIG. Sistema de Informaci�n Geogr�fica de la Generalitat Valenciana
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2 | *
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3 | * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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4 | *
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5 | * This program is free software; you can redistribute it and/or
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6 | * modify it under the terms of the GNU General Public License
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7 | * as published by the Free Software Foundation; either version 2
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8 | * of the License, or (at your option) any later version.
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9 | *
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10 | * This program is distributed in the hope that it will be useful,
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 | * GNU General Public License for more details.
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14 | *
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15 | * You should have received a copy of the GNU General Public License
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16 | * along with this program; if not, write to the Free Software
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17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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18 | *
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19 | * For more information, contact:
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20 | *
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21 | * Generalitat Valenciana
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22 | * Conselleria d'Infraestructures i Transport
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23 | * Av. Blasco Ib��ez, 50
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24 | * 46010 VALENCIA
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25 | * SPAIN
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26 | *
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27 | * +34 963862235
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28 | * gvsig@gva.es
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29 | * www.gvsig.gva.es
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30 | *
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31 | * or
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32 | *
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33 | * IVER T.I. S.A
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34 | * Salamanca 50
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35 | * 46005 Valencia
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36 | * Spain
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37 | *
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38 | * +34 963163400
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39 | * dac@iver.es
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40 | */
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41 | package org.gvsig.symbology.fmap.rendering.filter.operations; |
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42 | |||
43 | import java.util.ArrayList; |
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44 | import java.util.Hashtable; |
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45 | |||
46 | import com.hardcode.gdbms.engine.values.Value; |
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47 | import com.iver.cit.gvsig.fmap.Messages; |
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48 | /**
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49 | * Implements the funcionality of a double constant
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50 | *
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51 | * @author Pepe Vidal Salvador - jose.vidal.salvador@iver.es
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52 | *
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53 | */
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54 | 22501 | jdominguez | public class NumericalConstant extends Operator { |
55 | 22187 | jdominguez | private double doubleValue; |
56 | private int integerValue; |
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57 | private boolean isDoubleValue = false; |
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58 | |||
59 | public String getName() { |
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60 | return OperationTags.NUMERIC_VALUE;
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61 | } |
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62 | |||
63 | |||
64 | 22501 | jdominguez | public NumericalConstant(Hashtable<String, Value> symbol_table) { |
65 | super(symbol_table);
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66 | 22187 | jdominguez | } |
67 | |||
68 | public Object evaluate(Hashtable<String, Value> symbol_table) { |
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69 | |||
70 | if(isDoubleValue)
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71 | return doubleValue;
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72 | return integerValue;
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73 | |||
74 | } |
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75 | |||
76 | |||
77 | public String getDescription() { |
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78 | return Messages.getString(OperationTags.CONSTANT);
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79 | } |
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80 | |||
81 | public Class getResultType() { |
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82 | return Integer.class; |
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83 | } |
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84 | |||
85 | public void addArguments(ArrayList<Expression> expressions) { |
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86 | |||
87 | throw new RuntimeException("Cannot add arguments to a constant"); |
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88 | |||
89 | } |
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90 | |||
91 | public void addArgument(int i, Expression arg) { |
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92 | |||
93 | throw new RuntimeException("Cannot add arguments to a constant"); |
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94 | } |
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95 | |||
96 | |||
97 | public String getPattern() { |
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98 | return null; |
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99 | } |
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100 | |||
101 | public ArrayList<Expression> getArguments() { |
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102 | return null; |
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103 | } |
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104 | |||
105 | public void setArguments(ArrayList<Expression> arguments) { |
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106 | return;
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107 | } |
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108 | |||
109 | |||
110 | public void check(Hashtable<String, Value> symbol_table) throws ExpressionException { |
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111 | return;
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112 | } |
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113 | |||
114 | |||
115 | public Object getValue() { |
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116 | if(isDoubleValue)
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117 | return doubleValue;
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118 | return integerValue;
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119 | } |
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120 | |||
121 | |||
122 | public boolean isDoubleValue() { |
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123 | return isDoubleValue;
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124 | } |
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125 | |||
126 | |||
127 | public void setDoubleValue(boolean isDoubleValue) { |
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128 | this.isDoubleValue = isDoubleValue;
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129 | } |
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130 | } |