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 / DefaultExpressionEvaluator.java @ 44154
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1 | 43983 | jjdelcerro | package org.gvsig.fmap.dal.impl.expressionevaluator; |
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2 | 43521 | jjdelcerro | |
3 | import java.util.ArrayList; |
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4 | 43809 | jjdelcerro | import java.util.HashSet; |
5 | 43521 | jjdelcerro | import java.util.List; |
6 | 43809 | jjdelcerro | import java.util.Set; |
7 | 43521 | jjdelcerro | import org.gvsig.expressionevaluator.Code; |
8 | import org.gvsig.expressionevaluator.SymbolTable; |
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9 | 43984 | jjdelcerro | import org.gvsig.expressionevaluator.Expression; |
10 | 43521 | jjdelcerro | import org.gvsig.expressionevaluator.ExpressionEvaluatorLocator; |
11 | 43983 | jjdelcerro | import org.gvsig.expressionevaluator.ExpressionEvaluatorManager; |
12 | 43521 | jjdelcerro | import org.gvsig.expressionevaluator.Function; |
13 | 43983 | jjdelcerro | import org.gvsig.fmap.dal.expressionevaluator.FeatureSymbolTable; |
14 | import org.gvsig.fmap.dal.feature.Feature; |
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15 | 43521 | jjdelcerro | import org.gvsig.tools.evaluator.AbstractEvaluator; |
16 | 43983 | jjdelcerro | import org.gvsig.tools.evaluator.Evaluator; |
17 | 43521 | jjdelcerro | import org.gvsig.tools.evaluator.EvaluatorData; |
18 | import org.gvsig.tools.evaluator.EvaluatorException; |
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19 | 43809 | jjdelcerro | import org.gvsig.tools.evaluator.EvaluatorFieldsInfo; |
20 | 43983 | jjdelcerro | import org.gvsig.tools.evaluator.EvaluatorWithDescriptions; |
21 | 43809 | jjdelcerro | import org.gvsig.tools.exception.BaseException; |
22 | import org.gvsig.tools.visitor.VisitCanceledException; |
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23 | import org.gvsig.tools.visitor.Visitor; |
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24 | import org.gvsig.tools.lang.Cloneable; |
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25 | 43521 | jjdelcerro | |
26 | 43983 | jjdelcerro | public class DefaultExpressionEvaluator |
27 | extends AbstractEvaluator
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28 | implements EvaluatorWithDescriptions, Cloneable |
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29 | { |
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30 | 43521 | jjdelcerro | |
31 | private static class DescriptionAdapter implements Description { |
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32 | |||
33 | Function function; |
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34 | 43983 | jjdelcerro | |
35 | 43521 | jjdelcerro | public DescriptionAdapter(Function function) {
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36 | this.function = function;
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37 | } |
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38 | 43983 | jjdelcerro | |
39 | 43521 | jjdelcerro | @Override
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40 | public String getName() { |
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41 | return this.function.name(); |
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42 | } |
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43 | |||
44 | @Override
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45 | public String getDescription() { |
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46 | return this.function.description(); |
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47 | } |
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48 | |||
49 | @Override
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50 | public String getTemplate() { |
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51 | return this.function.template(); |
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52 | } |
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53 | |||
54 | @Override
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55 | public int getDataTypeCategories() { |
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56 | 43983 | jjdelcerro | switch (this.function.group()) { |
57 | case Function.GROUP_STRING:
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58 | return Description.DATATYPE_CATEGORY_STRING;
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59 | case Function.GROUP_BOOLEAN:
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60 | return Description.DATATYPE_CATEGORY_BOOLEAN;
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61 | case Function.GROUP_DATETIME:
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62 | return Description.DATATYPE_CATEGORY_DATETIME;
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63 | case Function.GROUP_NUMERIC:
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64 | return Description.DATATYPE_CATEGORY_NUMBER;
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65 | case Function.GROUP_OGC:
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66 | return Description.DATATYPE_CATEGORY_ALL;
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67 | default:
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68 | return Description.DATATYPE_CATEGORY_ALL;
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69 | 43521 | jjdelcerro | } |
70 | } |
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71 | 43983 | jjdelcerro | |
72 | } |
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73 | |||
74 | private FeatureSymbolTable featureSymbolTable;
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75 | 44009 | jjdelcerro | private SymbolTable symbolTable;
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76 | 43984 | jjdelcerro | private Expression expression; |
77 | 43521 | jjdelcerro | private Description[] availableOperators; |
78 | private Description[] availableFunctions; |
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79 | |||
80 | 43983 | jjdelcerro | public DefaultExpressionEvaluator(String source) { |
81 | 44009 | jjdelcerro | ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
82 | this.symbolTable = manager.createSymbolTable();
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83 | 43983 | jjdelcerro | this.featureSymbolTable = new DefaultFeatureSymbolTable(); |
84 | 44009 | jjdelcerro | this.symbolTable.addSymbolTable(this.featureSymbolTable); |
85 | |||
86 | this.expression = manager.createExpression();
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87 | 43984 | jjdelcerro | this.expression.setPhrase(source);
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88 | 43521 | jjdelcerro | } |
89 | |||
90 | 43984 | jjdelcerro | public DefaultExpressionEvaluator(Expression expression) { |
91 | 44009 | jjdelcerro | ExpressionEvaluatorManager manager = ExpressionEvaluatorLocator.getManager(); |
92 | 43984 | jjdelcerro | this.expression = expression;
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93 | 44009 | jjdelcerro | this.symbolTable = manager.createSymbolTable();
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94 | 43984 | jjdelcerro | this.featureSymbolTable = new DefaultFeatureSymbolTable( |
95 | expression.getUserScript(), |
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96 | expression.getScripts() |
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97 | ); |
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98 | 44009 | jjdelcerro | this.symbolTable.addSymbolTable(this.featureSymbolTable); |
99 | |||
100 | 43984 | jjdelcerro | } |
101 | |||
102 | 43521 | jjdelcerro | @Override
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103 | public Object evaluate(EvaluatorData data) throws EvaluatorException { |
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104 | 43983 | jjdelcerro | this.featureSymbolTable.setFeature((Feature) data);
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105 | 44009 | jjdelcerro | Object v = this.expression.execute(this.symbolTable); |
106 | 43521 | jjdelcerro | return v;
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107 | } |
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108 | |||
109 | @Override
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110 | public String getName() { |
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111 | return "Genereric expression"; |
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112 | } |
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113 | |||
114 | @Override
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115 | 43809 | jjdelcerro | public EvaluatorFieldsInfo getFieldsInfo() {
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116 | 43983 | jjdelcerro | final Set<String> names = new HashSet<>(); |
117 | 43809 | jjdelcerro | try {
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118 | 44009 | jjdelcerro | this.expression.getCode().accept(new Visitor() { |
119 | 43809 | jjdelcerro | @Override
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120 | public void visit(Object code) throws VisitCanceledException, BaseException { |
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121 | 43983 | jjdelcerro | if (code instanceof Code.Identifier) { |
122 | 43809 | jjdelcerro | Code.Identifier identifier = (Code.Identifier) code; |
123 | names.add(identifier.name()); |
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124 | } |
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125 | } |
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126 | }); |
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127 | EvaluatorFieldsInfo info = new EvaluatorFieldsInfo();
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128 | for (String name : names) { |
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129 | info.addFieldValue(name); |
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130 | } |
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131 | return info;
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132 | } catch (BaseException ex) {
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133 | throw new RuntimeException("Can't calculate fields information.", ex); |
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134 | } |
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135 | } |
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136 | |||
137 | @Override
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138 | 43521 | jjdelcerro | public Description[] getAvailableOperators() { |
139 | 43983 | jjdelcerro | if (availableOperators == null) { |
140 | 43521 | jjdelcerro | List<Description> l = new ArrayList<>(); |
141 | 43983 | jjdelcerro | for (Function function : getSymbolTable()) {
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142 | if (function.isOperator()) {
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143 | 43521 | jjdelcerro | l.add(new DescriptionAdapter(function));
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144 | } |
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145 | } |
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146 | this.availableOperators = l.toArray(new Description[l.size()]); |
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147 | } |
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148 | return availableOperators;
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149 | } |
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150 | 43983 | jjdelcerro | |
151 | 43521 | jjdelcerro | @Override
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152 | public Description[] getAvailableFunctions() { |
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153 | 43983 | jjdelcerro | if (availableFunctions == null) { |
154 | 43521 | jjdelcerro | List<Description> l = new ArrayList<>(); |
155 | 43983 | jjdelcerro | for (Function function : getSymbolTable()) {
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156 | if (!function.isOperator()) {
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157 | 43521 | jjdelcerro | l.add(new DescriptionAdapter(function));
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158 | } |
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159 | } |
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160 | this.availableFunctions = l.toArray(new Description[l.size()]); |
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161 | } |
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162 | return availableFunctions;
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163 | } |
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164 | |||
165 | 43983 | jjdelcerro | private SymbolTable getSymbolTable() {
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166 | 44009 | jjdelcerro | return this.symbolTable; |
167 | 43521 | jjdelcerro | } |
168 | |||
169 | @Override
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170 | 43983 | jjdelcerro | public Evaluator clone() throws CloneNotSupportedException { |
171 | 43809 | jjdelcerro | DefaultExpressionEvaluator other = (DefaultExpressionEvaluator) super.clone();
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172 | 43984 | jjdelcerro | other.expression = this.expression.clone();
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173 | 43809 | jjdelcerro | other.availableFunctions = null;
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174 | other.availableOperators = null;
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175 | |||
176 | 43983 | jjdelcerro | if (this.featureSymbolTable != null) { |
177 | other.featureSymbolTable = this.featureSymbolTable.clone();
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178 | 43809 | jjdelcerro | } |
179 | 44009 | jjdelcerro | if (this.symbolTable != null) { |
180 | other.symbolTable = this.symbolTable.clone();
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181 | 43809 | jjdelcerro | } |
182 | return other;
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183 | } |
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184 | |||
185 | 43521 | jjdelcerro | } |