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 / numeric / RandFunction.java @ 43983
History | View | Annotate | Download (751 Bytes)
1 | 43512 | jjdelcerro | package org.gvsig.expressionevaluator.impl.function.numeric; |
---|---|---|---|
2 | |||
3 | import java.util.Random; |
||
4 | import org.apache.commons.lang3.Range; |
||
5 | 43521 | jjdelcerro | import org.gvsig.expressionevaluator.Interpreter; |
6 | 43512 | jjdelcerro | import org.gvsig.expressionevaluator.spi.AbstractFunction; |
7 | |||
8 | public class RandFunction extends AbstractFunction { |
||
9 | |||
10 | private Random random; |
||
11 | |||
12 | public RandFunction() {
|
||
13 | super("Numeric", "RAND", Range.between(0, 1)); |
||
14 | this.addAlias("RANDOM"); |
||
15 | } |
||
16 | |||
17 | @Override
|
||
18 | 43521 | jjdelcerro | public Object call(Interpreter interpreter, Object[] args) { |
19 | 43512 | jjdelcerro | if( args.length == 1 ) { |
20 | this.random = new Random(getLong(args, 1)); |
||
21 | } |
||
22 | if( this.random == null ) { |
||
23 | this.random = new Random(); |
||
24 | } |
||
25 | return Math.random(); |
||
26 | } |
||
27 | } |