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 / WhileFunction.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 | 43939 | jjdelcerro | public class WhileFunction extends AbstractFunction { |
11 | 43512 | jjdelcerro | |
12 | 44138 | jjdelcerro | public static final String NAME = "WHILE"; |
13 | |||
14 | 43939 | jjdelcerro | public WhileFunction() {
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15 | 44138 | jjdelcerro | super(Function.GROUP_PROGRAMMING,
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16 | NAME, |
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17 | 43939 | jjdelcerro | Range.is(2),
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18 | "The while() function evaluate expression while the condition is true.",
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19 | 44138 | jjdelcerro | NAME+"( condition, expression )",
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20 | 44098 | jjdelcerro | null,
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21 | "Object",
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22 | false
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23 | 43939 | jjdelcerro | ); |
24 | 43512 | jjdelcerro | } |
25 | |||
26 | @Override
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27 | 43939 | jjdelcerro | public boolean useArgumentsInsteadObjects() { |
28 | return true; |
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29 | } |
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30 | |||
31 | @Override
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32 | 43521 | jjdelcerro | public Object call(Interpreter interpreter, Object[] args) throws Exception { |
33 | 43939 | jjdelcerro | throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
34 | } |
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35 | |||
36 | @Override
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37 | 44138 | jjdelcerro | public boolean allowConstantFolding() { |
38 | return false; |
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39 | } |
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40 | |||
41 | @Override
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42 | public Object call(Interpreter interpreter, Codes args) throws Exception { |
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43 | 43939 | jjdelcerro | Object body = null; |
44 | boolean condition = getBoolean(interpreter, args, 0); |
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45 | while( condition ) {
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46 | body = getObject(interpreter, args, 1);
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47 | condition = getBoolean(interpreter, args, 0);
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48 | 43512 | jjdelcerro | } |
49 | 43939 | jjdelcerro | return body;
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50 | 43512 | jjdelcerro | } |
51 | |||
52 | } |