svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.impl / src / main / java / org / gvsig / fmap / dal / impl / expressionevaluator / DefaultFeatureSymbolTable.java @ 43983
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1 | 43983 | jjdelcerro | package org.gvsig.fmap.dal.impl.expressionevaluator; |
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2 | |||
3 | import org.apache.commons.lang3.Range; |
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4 | import org.gvsig.expressionevaluator.ExpressionEvaluatorLocator; |
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5 | import org.gvsig.expressionevaluator.ExpressionEvaluatorManager; |
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6 | import org.gvsig.expressionevaluator.Function; |
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7 | import org.gvsig.expressionevaluator.Interpreter; |
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8 | import org.gvsig.expressionevaluator.SymbolTable; |
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9 | import org.gvsig.expressionevaluator.spi.AbstractFunction; |
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10 | import org.gvsig.expressionevaluator.spi.AbstractSymbolTable; |
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11 | import org.gvsig.fmap.dal.expressionevaluator.FeatureSymbolTable; |
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12 | import org.gvsig.fmap.dal.feature.Feature; |
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13 | import org.gvsig.fmap.dal.feature.FeatureSelection; |
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14 | import org.gvsig.fmap.dal.feature.FeatureStore; |
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15 | import org.gvsig.fmap.dal.feature.FeatureType; |
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16 | |||
17 | /**
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18 | *
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19 | * @author jjdelcerro
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20 | */
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21 | public class DefaultFeatureSymbolTable extends AbstractSymbolTable implements FeatureSymbolTable { |
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22 | |||
23 | private class FeatureFunction extends AbstractFunction { |
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24 | |||
25 | public FeatureFunction() {
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26 | super(
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27 | "Data access",
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28 | "feature",
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29 | Range.is(0),
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30 | "Access to the current feature object when used in a filter.\n"
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31 | + "Return null if used outer a filter.",
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32 | "feature()",
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33 | null,
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34 | "Feature"
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35 | ); |
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36 | } |
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37 | |||
38 | @Override
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39 | public Object call(Interpreter interpreter, Object[] args) throws Exception { |
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40 | return feature;
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41 | } |
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42 | |||
43 | } |
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44 | |||
45 | public class FeatureStoreFunction extends AbstractFunction { |
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46 | |||
47 | public FeatureStoreFunction() {
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48 | super(
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49 | "Data access",
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50 | "store",
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51 | Range.is(0),
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52 | "Access to the current store object when used in a filter.\n"
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53 | + "Return null if used outer a filter.",
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54 | "store()",
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55 | null,
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56 | "FeatureStore"
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57 | ); |
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58 | } |
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59 | |||
60 | @Override
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61 | public Object call(Interpreter interpreter, Object[] args) throws Exception { |
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62 | return feature.getStore();
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63 | } |
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64 | |||
65 | } |
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66 | |||
67 | public class IsSelectedFunction extends AbstractFunction { |
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68 | |||
69 | public IsSelectedFunction() {
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70 | super(
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71 | "Data access",
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72 | "isSelected",
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73 | Range.is(0),
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74 | "Return if the current feature is selected in the store when used in a filter.\n"
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75 | + "Return false if used outer a filter.",
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76 | "isSelected()",
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77 | null,
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78 | "Boolean"
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79 | ); |
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80 | } |
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81 | |||
82 | @Override
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83 | public Object call(Interpreter interpreter, Object[] args) throws Exception { |
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84 | FeatureStore store = feature.getStore(); |
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85 | FeatureSelection selection = store.getFeatureSelection(); |
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86 | return selection.isSelected(feature);
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87 | } |
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88 | |||
89 | } |
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90 | |||
91 | private Feature feature;
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92 | private FeatureType type;
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93 | |||
94 | public DefaultFeatureSymbolTable() {
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95 | super("DAL.FeatureSymbolTable"); |
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96 | |||
97 | this.addFunction(new FeatureFunction()); |
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98 | this.addFunction(new FeatureStoreFunction()); |
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99 | this.addFunction(new IsSelectedFunction()); |
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100 | } |
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101 | |||
102 | public final void addFunction(Function function) { |
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103 | if (function == null) { |
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104 | throw new IllegalArgumentException("function can't be null"); |
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105 | } |
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106 | this.getFunctions().put(function.name().toUpperCase(), function);
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107 | } |
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108 | |||
109 | @Override
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110 | public FeatureSymbolTable clone() throws CloneNotSupportedException { |
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111 | DefaultFeatureSymbolTable other = (DefaultFeatureSymbolTable) super.clone();
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112 | return other;
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113 | } |
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114 | |||
115 | @Override
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116 | public boolean exists(String name) { |
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117 | if (type.get(name) != null) { |
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118 | return true; |
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119 | } |
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120 | return false; |
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121 | } |
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122 | |||
123 | @Override
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124 | public Object value(String name) { |
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125 | return this.feature.get(name); |
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126 | } |
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127 | |||
128 | @Override
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129 | public void setFeature(Feature feature) { |
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130 | this.feature = feature;
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131 | this.type = feature.getType();
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132 | } |
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133 | |||
134 | public static void selfRegister() { |
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135 | ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
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136 | manager.registerSymbolTable(new DefaultFeatureSymbolTable());
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137 | } |
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138 | } |