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 / NotOperator.java @ 44207
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| 1 | 43512 | jjdelcerro | package org.gvsig.expressionevaluator.impl.function.operator; |
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| 2 | |||
| 3 | 44207 | jjdelcerro | import static org.gvsig.expressionevaluator.ExpressionBuilder.OPERATOR_NOT; |
| 4 | 43521 | jjdelcerro | import org.gvsig.expressionevaluator.Function; |
| 5 | import org.gvsig.expressionevaluator.Interpreter; |
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| 6 | 43512 | jjdelcerro | |
| 7 | 43521 | jjdelcerro | |
| 8 | 43512 | jjdelcerro | public class NotOperator extends AbstractUnaryOperator { |
| 9 | |||
| 10 | public NotOperator() {
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| 11 | 44207 | jjdelcerro | super(Function.GROUP_BOOLEAN, OPERATOR_NOT, true); |
| 12 | 43512 | jjdelcerro | this.addAlias("!"); |
| 13 | } |
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| 14 | |||
| 15 | @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 arg) { |
| 22 | 43512 | jjdelcerro | if( ! (arg instanceof Boolean) ) { |
| 23 | throw new IllegalArgumentException("NOT operator require a boolean"); |
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| 24 | } |
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| 25 | return !((Boolean)arg); |
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| 26 | } |
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| 27 | |||
| 28 | } |