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 / IsOperator.java @ 44207
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| 1 | 43512 | jjdelcerro | package org.gvsig.expressionevaluator.impl.function.operator; |
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| 2 | |||
| 3 | 43521 | jjdelcerro | import org.apache.commons.lang3.ObjectUtils; |
| 4 | import org.apache.commons.math.util.MathUtils; |
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| 5 | 44207 | jjdelcerro | import static org.gvsig.expressionevaluator.ExpressionBuilder.OPERATOR_IS; |
| 6 | 43521 | jjdelcerro | import org.gvsig.expressionevaluator.Function; |
| 7 | import org.gvsig.expressionevaluator.Interpreter; |
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| 8 | |||
| 9 | 44009 | jjdelcerro | public class IsOperator extends AbstractBinaryOperator { |
| 10 | 43512 | jjdelcerro | |
| 11 | 44009 | jjdelcerro | public IsOperator() {
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| 12 | 44207 | jjdelcerro | super(Function.GROUP_BOOLEAN, OPERATOR_IS, true); |
| 13 | 43512 | jjdelcerro | } |
| 14 | 43521 | jjdelcerro | |
| 15 | 43512 | jjdelcerro | @Override
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| 16 | 44009 | jjdelcerro | public boolean allowConstantFolding() { |
| 17 | return true; |
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| 18 | } |
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| 19 | |||
| 20 | @Override
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| 21 | 43521 | jjdelcerro | public Object call(Interpreter interpreter, Object op1, Object op2) { |
| 22 | 44034 | jjdelcerro | |
| 23 | // FIXME: https://stackoverflow.com/questions/9822154/standard-sql-boolean-operator-is-vs-equals-operator
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| 24 | |||
| 25 | 43531 | jjdelcerro | int type = this.getType(op1, op2); |
| 26 | if( (type & TYPE_DOUBLE) == TYPE_DOUBLE ) {
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| 27 | boolean value = MathUtils.compareTo(
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| 28 | ((Number) op1).doubleValue(),
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| 29 | ((Number) op2).doubleValue(),
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| 30 | interpreter.getAccuracy()==null? MathUtils.EPSILON:interpreter.getAccuracy()
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| 31 | ) == 0;
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| 32 | return value;
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| 33 | 43521 | jjdelcerro | } |
| 34 | 43531 | jjdelcerro | if( (type & TYPE_FLOAT) == TYPE_FLOAT ) {
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| 35 | boolean value = MathUtils.compareTo(
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| 36 | ((Number) op1).floatValue(),
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| 37 | ((Number) op2).floatValue(),
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| 38 | interpreter.getAccuracy()==null? MathUtils.EPSILON:interpreter.getAccuracy()
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| 39 | ) == 0;
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| 40 | return value;
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| 41 | } |
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| 42 | if( (type & TYPE_LONG) == TYPE_LONG ) {
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| 43 | boolean value = ((Number) op1).longValue() == ((Number) op2).longValue(); |
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| 44 | return value;
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| 45 | } |
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| 46 | if( (type & TYPE_INT) == TYPE_INT ) {
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| 47 | boolean value = ((Number) op1).intValue() == ((Number) op2).intValue(); |
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| 48 | return value;
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| 49 | } |
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| 50 | 43512 | jjdelcerro | if( op2 instanceof Comparable && op2 instanceof Comparable ) { |
| 51 | 43521 | jjdelcerro | boolean value = ObjectUtils.compare((Comparable)op1,(Comparable)op2) == 0; |
| 52 | 43512 | jjdelcerro | return value;
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| 53 | } |
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| 54 | 43521 | jjdelcerro | throw new IllegalArgumentException("Types not allowed in '" + name() + "' operand."); |
| 55 | 43512 | jjdelcerro | } |
| 56 | |||
| 57 | } |