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 / programming / IFNULLFunction.java @ 44207
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1 | 44138 | jjdelcerro | package org.gvsig.expressionevaluator.impl.function.programming; |
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2 | 43512 | jjdelcerro | |
3 | import org.apache.commons.lang3.Range; |
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4 | 44138 | jjdelcerro | import org.gvsig.expressionevaluator.Codes; |
5 | 43939 | jjdelcerro | import org.gvsig.expressionevaluator.Function; |
6 | 43521 | jjdelcerro | import org.gvsig.expressionevaluator.Interpreter; |
7 | 43512 | jjdelcerro | import org.gvsig.expressionevaluator.spi.AbstractFunction; |
8 | |||
9 | 44138 | jjdelcerro | |
10 | 44038 | jjdelcerro | public class IFNULLFunction extends AbstractFunction { |
11 | 43512 | jjdelcerro | |
12 | 44038 | jjdelcerro | public IFNULLFunction() {
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13 | 44138 | jjdelcerro | super(Function.GROUP_BOOLEAN,
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14 | 44038 | jjdelcerro | "IFNULL",
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15 | 43939 | jjdelcerro | Range.is(3),
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16 | 44038 | jjdelcerro | "The IFNULL() function tests if a specified value is null and returns one of two values, based on whether the value is null was true or false.",
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17 | "IFNULL( {{value}}, true, false )",
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18 | null,
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19 | "Object",
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20 | true
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21 | 43939 | jjdelcerro | ); |
22 | 43512 | jjdelcerro | } |
23 | |||
24 | @Override
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25 | 43939 | jjdelcerro | public boolean useArgumentsInsteadObjects() { |
26 | return true; |
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27 | } |
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28 | |||
29 | @Override
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30 | 44138 | jjdelcerro | public boolean allowConstantFolding() { |
31 | return false; |
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32 | } |
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33 | |||
34 | @Override
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35 | 43521 | jjdelcerro | public Object call(Interpreter interpreter, Object[] args) throws Exception { |
36 | 44038 | jjdelcerro | throw new UnsupportedOperationException("Not supported yet."); |
37 | 43939 | jjdelcerro | } |
38 | |||
39 | @Override
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40 | 44138 | jjdelcerro | public Object call(Interpreter interpreter, Codes args) throws Exception { |
41 | 44038 | jjdelcerro | Object value = getObject(interpreter, args, 0); |
42 | if( value == null ) { |
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43 | 43939 | jjdelcerro | value = getObject(interpreter, args, 1);
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44 | } else {
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45 | value = getObject(interpreter, args, 2);
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46 | 43512 | jjdelcerro | } |
47 | 43939 | jjdelcerro | return value;
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48 | 43512 | jjdelcerro | } |
49 | |||
50 | } |