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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package org.gvsig.expressionevaluator.impl.function.operator; |
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import org.gvsig.expressionevaluator.Function; |
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import org.gvsig.expressionevaluator.Interpreter; |
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public class NotOperator extends AbstractUnaryOperator { |
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public NotOperator() {
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super(Function.GROUP_BOOLEAN,"NOT"); |
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this.addAlias("!"); |
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} |
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@Override
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public boolean allowConstantFolding() { |
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return true; |
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} |
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@Override
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public Object call(Interpreter interpreter, Object arg) { |
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if( ! (arg instanceof Boolean) ) { |
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throw new IllegalArgumentException("NOT operator require a boolean"); |
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} |
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return !((Boolean)arg); |
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} |
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} |