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 / DivOperator.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 DivOperator |
9 | extends AbstractBinaryOperator
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10 | implements Optimizer.FunctionOptimizer
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11 | { |
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12 | 44139 | jjdelcerro | public static final String NAME = "/"; |
13 | 43512 | jjdelcerro | |
14 | public DivOperator() {
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15 | 44139 | jjdelcerro | super(Function.GROUP_NUMERIC, NAME);
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16 | 43512 | jjdelcerro | } |
17 | |||
18 | @Override
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19 | 44009 | jjdelcerro | public boolean allowConstantFolding() { |
20 | return true; |
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21 | } |
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22 | |||
23 | @Override
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24 | 43521 | jjdelcerro | public Object call(Interpreter interpreter, Object op1, Object op2) { |
25 | 43512 | jjdelcerro | int type = this.getType(op1, op2); |
26 | if( (type & TYPE_DOUBLE) == TYPE_DOUBLE ) {
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27 | double value = ((Number) op1).doubleValue() / ((Number) op2).doubleValue(); |
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28 | return value;
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29 | } |
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30 | if( (type & TYPE_FLOAT) == TYPE_FLOAT ) {
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31 | double value = ((Number) op1).floatValue() / ((Number) op2).floatValue(); |
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32 | return value;
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33 | } |
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34 | if( (type & TYPE_LONG) == TYPE_LONG ) {
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35 | long value = ((Number) op1).longValue() / ((Number) op2).longValue(); |
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36 | return value;
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37 | } |
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38 | if( (type & TYPE_INT) == TYPE_INT ) {
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39 | int value = ((Number) op1).intValue() / ((Number) op2).intValue(); |
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40 | return value;
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41 | } |
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42 | throw new IllegalArgumentException("Types not allowed in '"+name()+"' operand."); |
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43 | } |
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44 | |||
45 | |||
46 | 44010 | jjdelcerro | @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 | } |
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69 | } |
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70 | Code newCode = optimizer.getCodeBuilder().operator(caller.name(), op1, op2); |
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71 | return newCode;
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72 | |||
73 | } else if ( op2.code() == Code.CONSTANT ) { |
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74 | Object value = ((Code.Constant)op2).value();
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75 | if( value instanceof Number ) { |
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76 | double n = ((Number) value).doubleValue(); |
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77 | if( n == 1 ) { |
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78 | return op1;
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79 | } |
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80 | } |
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81 | Code newCode = optimizer.getCodeBuilder().operator(caller.name(), op1, op2); |
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82 | return newCode;
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83 | } |
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84 | |||
85 | return caller;
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86 | } |
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87 | |||
88 | 43512 | jjdelcerro | } |