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 / SubstOperator.java @ 46505
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| 1 | 43512 | jjdelcerro | package org.gvsig.expressionevaluator.impl.function.operator; |
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| 2 | |||
| 3 | 46005 | omartinez | import java.math.BigDecimal; |
| 4 | 44010 | jjdelcerro | import org.gvsig.expressionevaluator.Code; |
| 5 | 44207 | jjdelcerro | import static org.gvsig.expressionevaluator.ExpressionBuilder.OPERATOR_SUBST; |
| 6 | 43521 | jjdelcerro | import org.gvsig.expressionevaluator.Function; |
| 7 | import org.gvsig.expressionevaluator.Interpreter; |
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| 8 | 44010 | jjdelcerro | import org.gvsig.expressionevaluator.Optimizer; |
| 9 | import org.gvsig.expressionevaluator.Optimizer.FunctionOptimizer; |
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| 10 | 43521 | jjdelcerro | |
| 11 | 44010 | jjdelcerro | public class SubstOperator |
| 12 | extends AbstractBinaryOperator
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| 13 | implements FunctionOptimizer
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| 14 | {
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| 15 | 44207 | jjdelcerro | |
| 16 | 43512 | jjdelcerro | public SubstOperator() {
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| 17 | 44207 | jjdelcerro | super(Function.GROUP_NUMERIC, OPERATOR_SUBST, true); |
| 18 | 43512 | jjdelcerro | } |
| 19 | |||
| 20 | @Override
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| 21 | 44009 | jjdelcerro | public boolean allowConstantFolding() { |
| 22 | return true; |
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| 23 | } |
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| 24 | |||
| 25 | @Override
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| 26 | 45307 | omartinez | public Object call(Interpreter interpreter, Object op1, Object op2) { |
| 27 | if (op1 == null || op2 == null) { |
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| 28 | return null; |
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| 29 | } |
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| 30 | 43512 | jjdelcerro | int type = this.getType(op1, op2); |
| 31 | 46005 | omartinez | if( (type & TYPE_BIGDECIMAL) == TYPE_BIGDECIMAL ) {
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| 32 | BigDecimal value = getBigDecimal(op1,1).subtract(getBigDecimal(op2,2)); |
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| 33 | return value;
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| 34 | } |
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| 35 | 43512 | jjdelcerro | if( (type & TYPE_DOUBLE) == TYPE_DOUBLE ) {
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| 36 | 44855 | jjdelcerro | double value = getDouble(op1,1) - getDouble(op2,2); |
| 37 | 46505 | fdiaz | checkDoubleValue(value); |
| 38 | 43512 | jjdelcerro | return value;
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| 39 | } |
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| 40 | if( (type & TYPE_FLOAT) == TYPE_FLOAT ) {
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| 41 | 44855 | jjdelcerro | double value = getFloat(op1,1) - getFloat(op2,2); |
| 42 | 46505 | fdiaz | checkDoubleValue(value); |
| 43 | 43512 | jjdelcerro | return value;
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| 44 | } |
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| 45 | if( (type & TYPE_LONG) == TYPE_LONG ) {
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| 46 | 44855 | jjdelcerro | long value = getLong(op1,1) - getLong(op2,2); |
| 47 | 43512 | jjdelcerro | return value;
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| 48 | } |
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| 49 | if( (type & TYPE_INT) == TYPE_INT ) {
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| 50 | 44855 | jjdelcerro | int value = getInt(op1,1) - getInt(op2,2); |
| 51 | 43512 | jjdelcerro | return value;
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| 52 | } |
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| 53 | throw new IllegalArgumentException("Types not allowed in '"+name()+"' operand."); |
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| 54 | } |
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| 55 | 44010 | jjdelcerro | |
| 56 | @Override
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| 57 | 44752 | jjdelcerro | public Code optimize(Optimizer optimizer, Code.Callable caller) {
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| 58 | 44198 | jjdelcerro | Code op1 = optimizer.optimize(caller.parameters().get(0));
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| 59 | Code op2 = optimizer.optimize(caller.parameters().get(1));
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| 60 | 44010 | jjdelcerro | |
| 61 | if ( op1.code() == Code.CONSTANT && op2.code() == Code.CONSTANT) {
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| 62 | Code newCode = optimizer.getCodeBuilder().constant( |
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| 63 | call( |
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| 64 | optimizer.getInterpreter(), |
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| 65 | ((Code.Constant)op1).value(), |
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| 66 | ((Code.Constant)op2).value() |
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| 67 | ) |
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| 68 | ); |
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| 69 | return newCode;
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| 70 | |||
| 71 | } else if ( op2.code() == Code.CONSTANT ) { |
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| 72 | Object value = ((Code.Constant)op2).value();
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| 73 | if( value instanceof Number ) { |
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| 74 | double n = ((Number) value).doubleValue(); |
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| 75 | if( n == 0 ) { |
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| 76 | return op1;
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| 77 | } |
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| 78 | } |
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| 79 | Code newCode = optimizer.getCodeBuilder().operator(caller.name(), op1, op2); |
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| 80 | return newCode;
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| 81 | } |
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| 82 | 43512 | jjdelcerro | |
| 83 | 44010 | jjdelcerro | return caller;
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| 84 | } |
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| 85 | |||
| 86 | 43512 | jjdelcerro | } |