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 / NegOperator.java @ 44098
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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 NegOperator extends AbstractUnaryOperator { |
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public NegOperator() {
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super(Function.GROUP_NUMERIC,"NEGATE"); |
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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 Number) ) { |
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throw new IllegalArgumentException("NEGATE function require a number"); |
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} |
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if( arg instanceof Double ) { |
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return -((Number)arg).doubleValue(); |
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} |
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if( arg instanceof Float ) { |
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return -((Number)arg).floatValue(); |
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} |
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if( arg instanceof Long ) { |
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return -((Number)arg).longValue(); |
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} |
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if( arg instanceof Integer ) { |
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return -((Number)arg).intValue(); |
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} |
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return -((Number)arg).doubleValue(); |
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} |
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} |