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 / function / operator / MulOperator.java @ 44198
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1 | 43512 | jjdelcerro | package org.gvsig.expressionevaluator.impl.function.operator; |
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2 | |||
3 | 44010 | jjdelcerro | import org.gvsig.expressionevaluator.Code; |
4 | 43521 | jjdelcerro | import org.gvsig.expressionevaluator.Function; |
5 | import org.gvsig.expressionevaluator.Interpreter; |
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6 | 44010 | jjdelcerro | import org.gvsig.expressionevaluator.Optimizer; |
7 | 43521 | jjdelcerro | |
8 | 44010 | jjdelcerro | public class MulOperator |
9 | extends AbstractBinaryOperator
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10 | implements Optimizer.FunctionOptimizer
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11 | { |
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12 | 43512 | jjdelcerro | |
13 | 44139 | jjdelcerro | public static final String NAME = "*"; |
14 | |||
15 | 43512 | jjdelcerro | public MulOperator() {
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16 | 44139 | jjdelcerro | super(Function.GROUP_NUMERIC, NAME);
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17 | 43512 | jjdelcerro | } |
18 | |||
19 | @Override
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20 | 44009 | jjdelcerro | public boolean allowConstantFolding() { |
21 | return true; |
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22 | } |
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23 | |||
24 | @Override
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25 | 43521 | jjdelcerro | public Object call(Interpreter interpreter, Object op1, Object op2) { |
26 | 43512 | jjdelcerro | int type = this.getType(op1, op2); |
27 | if( (type & TYPE_DOUBLE) == TYPE_DOUBLE ) {
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28 | double value = ((Number) op1).doubleValue() * ((Number) op2).doubleValue(); |
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29 | return value;
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30 | } |
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31 | if( (type & TYPE_FLOAT) == TYPE_FLOAT ) {
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32 | double value = ((Number) op1).floatValue() * ((Number) op2).floatValue(); |
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33 | return value;
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34 | } |
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35 | if( (type & TYPE_LONG) == TYPE_LONG ) {
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36 | long value = ((Number) op1).longValue() * ((Number) op2).longValue(); |
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37 | return value;
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38 | } |
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39 | if( (type & TYPE_INT) == TYPE_INT ) {
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40 | int value = ((Number) op1).intValue() * ((Number) op2).intValue(); |
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41 | return value;
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42 | } |
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43 | throw new IllegalArgumentException("Types not allowed in '"+name()+"' operand."); |
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44 | } |
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45 | 44010 | jjdelcerro | |
46 | @Override
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47 | public Code optimize(Optimizer optimizer, Code.Caller caller) {
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48 | 44198 | jjdelcerro | Code op1 = optimizer.optimize(caller.parameters().get(0));
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49 | Code op2 = optimizer.optimize(caller.parameters().get(1));
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50 | 44010 | jjdelcerro | |
51 | if ( op1.code() == Code.CONSTANT && op2.code() == Code.CONSTANT) {
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52 | Code newCode = optimizer.getCodeBuilder().constant( |
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53 | call( |
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54 | optimizer.getInterpreter(), |
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55 | ((Code.Constant)op1).value(), |
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56 | ((Code.Constant)op2).value() |
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57 | ) |
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58 | ); |
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59 | return newCode;
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60 | |||
61 | } else if ( op1.code() == Code.CONSTANT ) { |
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62 | Object value = ((Code.Constant)op1).value();
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63 | if( value instanceof Number ) { |
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64 | double n = ((Number) value).doubleValue(); |
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65 | if( n == 0 ) { |
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66 | Code newCode = optimizer.getCodeBuilder().constant(0);
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67 | return newCode;
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68 | } else if( n == 1 ) { |
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69 | return op2;
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70 | } |
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71 | } |
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72 | Code newCode = optimizer.getCodeBuilder().operator(caller.name(), op1, op2); |
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73 | return newCode;
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74 | |||
75 | } else if ( op2.code() == Code.CONSTANT ) { |
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76 | Object value = ((Code.Constant)op2).value();
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77 | if( value instanceof Number ) { |
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78 | double n = ((Number) value).doubleValue(); |
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79 | if( n == 0 ) { |
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80 | Code newCode = optimizer.getCodeBuilder().constant(0);
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81 | return newCode;
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82 | } else if( n == 1 ) { |
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83 | return op1;
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84 | } |
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85 | } |
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86 | Code newCode = optimizer.getCodeBuilder().operator(caller.name(), op1, op2); |
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87 | return newCode;
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88 | } |
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89 | |||
90 | return caller;
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91 | } |
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92 | 43512 | jjdelcerro | |
93 | |||
94 | } |