svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.lib / org.gvsig.expressionevaluator.lib.impl / src / main / java / org / gvsig / expressionevaluator / impl / javascripting / CosaScriptEngine.java @ 44389
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1 | 44389 | jjdelcerro | package org.gvsig.expressionevaluator.impl.javascripting; |
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2 | |||
3 | import java.io.IOException; |
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4 | import java.io.Reader; |
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5 | import java.io.Writer; |
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6 | import java.util.List; |
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7 | import javax.script.AbstractScriptEngine; |
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8 | import javax.script.Bindings; |
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9 | import javax.script.Compilable; |
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10 | import javax.script.CompiledScript; |
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11 | import javax.script.Invocable; |
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12 | import javax.script.ScriptContext; |
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13 | import javax.script.ScriptEngine; |
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14 | import javax.script.ScriptEngineFactory; |
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15 | import javax.script.ScriptException; |
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16 | import javax.script.SimpleScriptContext; |
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17 | import org.apache.commons.io.IOUtils; |
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18 | import org.apache.commons.lang3.StringUtils; |
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19 | import org.gvsig.expressionevaluator.Code; |
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20 | import org.gvsig.expressionevaluator.ExpressionEvaluatorLocator; |
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21 | import org.gvsig.expressionevaluator.ExpressionEvaluatorManager; |
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22 | import org.gvsig.expressionevaluator.ExpressionRuntimeException; |
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23 | import org.gvsig.expressionevaluator.Interpreter; |
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24 | import org.gvsig.expressionevaluator.MutableSymbolTable; |
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25 | |||
26 | /**
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27 | *
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28 | * @author jjdelcerro
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29 | */
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30 | public class CosaScriptEngine |
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31 | extends AbstractScriptEngine
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32 | implements ScriptEngine, Compilable, Invocable
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33 | { |
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34 | |||
35 | private class MyContextScript extends SimpleScriptContext { |
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36 | |||
37 | public MyContextScript() {
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38 | engineScope = new SymbolTableToBindingsAdapter(symbolTable);
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39 | } |
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40 | |||
41 | @Override
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42 | public void setWriter(Writer writer) { |
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43 | super.setWriter(writer);
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44 | interpreter.setWriter(writer); |
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45 | } |
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46 | |||
47 | @Override
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48 | public void setErrorWriter(Writer writer) { |
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49 | super.setErrorWriter(writer);
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50 | } |
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51 | } |
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52 | |||
53 | private final ScriptEngineFactory factory; |
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54 | private final MutableSymbolTable symbolTable; |
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55 | private final Interpreter interpreter; |
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56 | private final ExpressionEvaluatorManager manager; |
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57 | |||
58 | public CosaScriptEngine(ScriptEngineFactory factory) {
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59 | this.factory = factory;
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60 | this.manager = ExpressionEvaluatorLocator.getManager();
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61 | this.symbolTable = manager.createSymbolTable();
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62 | this.interpreter = manager.createInterpreter();
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63 | this.interpreter.setSymbolTable(this.symbolTable); |
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64 | this.context = new MyContextScript(); |
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65 | } |
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66 | |||
67 | @Override
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68 | public ScriptEngineFactory getFactory() {
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69 | return this.factory; |
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70 | } |
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71 | |||
72 | |||
73 | @Override
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74 | public Object eval(String source, ScriptContext context) throws ScriptException { |
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75 | CompiledScript script = this.compile(source);
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76 | Object x = script.eval(context);
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77 | return x;
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78 | } |
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79 | |||
80 | @Override
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81 | public Object eval(Reader source, ScriptContext context) throws ScriptException { |
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82 | CompiledScript script = this.compile(source);
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83 | Object x = script.eval(context);
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84 | return x;
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85 | } |
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86 | |||
87 | @Override
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88 | public Bindings createBindings() {
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89 | return new SymbolTableToBindingsAdapter(symbolTable); |
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90 | } |
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91 | |||
92 | @Override
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93 | public CompiledScript compile(String script) throws ScriptException { |
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94 | Code code = this.manager.compile(script);
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95 | CosaCompiledScript x = new CosaCompiledScript(this, code); |
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96 | return x;
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97 | } |
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98 | |||
99 | @Override
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100 | public CompiledScript compile(Reader script) throws ScriptException { |
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101 | List<String> lines; |
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102 | try {
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103 | lines = IOUtils.readLines(script); |
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104 | } catch (IOException ex) { |
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105 | throw new ScriptException(ex); |
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106 | } |
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107 | String source = StringUtils.join(lines, "\n"); |
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108 | return this.compile(source); |
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109 | } |
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110 | |||
111 | @Override
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112 | public Object invokeMethod(Object thiz, String name, Object... args) throws ScriptException, NoSuchMethodException { |
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113 | throw new UnsupportedOperationException("Not supported yet."); |
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114 | } |
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115 | |||
116 | @Override
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117 | public Object invokeFunction(String name, Object... args) throws ScriptException, NoSuchMethodException { |
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118 | if( !this.interpreter.hasFunction(name) ) { |
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119 | throw new NoSuchMethodException(name); |
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120 | } |
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121 | try {
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122 | return this.interpreter.call(name, args); |
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123 | } catch (Exception ex) { |
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124 | throw new ExpressionRuntimeException(this.interpreter.getCurrentCode(),"Error calling funcion '"+name+"'.", ex); |
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125 | } |
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126 | } |
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127 | |||
128 | @Override
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129 | public <T> T getInterface(Class<T> clasz) { |
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130 | return null; |
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131 | } |
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132 | |||
133 | @Override
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134 | public <T> T getInterface(Object thiz, Class<T> clasz) { |
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135 | return null; |
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136 | } |
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137 | |||
138 | } |