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 / string / LeftFunction.java @ 44198
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1 | 43512 | jjdelcerro | package org.gvsig.expressionevaluator.impl.function.string; |
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2 | |||
3 | import org.apache.commons.lang3.Range; |
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4 | import org.apache.commons.lang3.StringUtils; |
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5 | 43521 | jjdelcerro | import org.gvsig.expressionevaluator.Interpreter; |
6 | 43512 | jjdelcerro | import org.gvsig.expressionevaluator.spi.AbstractFunction; |
7 | |||
8 | public class LeftFunction extends AbstractFunction { |
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9 | |||
10 | public LeftFunction() {
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11 | super("String", "LEFT", Range.is(2)); |
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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[] args) throws Exception { |
21 | 43512 | jjdelcerro | String str = getStr(args,0); |
22 | int len = getInt(args, 1); |
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23 | |||
24 | String r = StringUtils.left(str, len);
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25 | return r;
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26 | } |
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27 | |||
28 | } |