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 @ 44009
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1 | 43512 | jjdelcerro | package org.gvsig.expressionevaluator.impl.function.operator; |
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2 | |||
3 | 43521 | jjdelcerro | import org.gvsig.expressionevaluator.Function; |
4 | import org.gvsig.expressionevaluator.Interpreter; |
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5 | 43512 | jjdelcerro | |
6 | 43521 | jjdelcerro | |
7 | 43512 | jjdelcerro | public class NotOperator extends AbstractUnaryOperator { |
8 | |||
9 | public NotOperator() {
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10 | 43521 | jjdelcerro | super(Function.GROUP_BOOLEAN,"NOT"); |
11 | 43512 | jjdelcerro | this.addAlias("!"); |
12 | } |
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13 | |||
14 | @Override
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15 | 44009 | jjdelcerro | public boolean allowConstantFolding() { |
16 | return true; |
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17 | } |
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18 | |||
19 | @Override
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20 | 43521 | jjdelcerro | public Object call(Interpreter interpreter, Object arg) { |
21 | 43512 | jjdelcerro | if( ! (arg instanceof Boolean) ) { |
22 | throw new IllegalArgumentException("NOT operator require a boolean"); |
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23 | } |
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24 | return !((Boolean)arg); |
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25 | } |
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26 | |||
27 | } |