svn-gvsig-desktop / branches / v2_0_0_prep / extensions / extExpressionField / src / com / iver / cit / gvsig / project / documents / table / operators / Random.java @ 24545
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1 | 10229 | caballero | package com.iver.cit.gvsig.project.documents.table.operators; |
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2 | |||
3 | import org.apache.bsf.BSFException; |
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4 | import org.apache.bsf.BSFManager; |
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6 | 13444 | caballero | import com.iver.andami.PluginServices; |
7 | import com.iver.cit.gvsig.ExpressionFieldExtension; |
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8 | 10229 | caballero | import com.iver.cit.gvsig.project.documents.table.AbstractOperator; |
9 | import com.iver.cit.gvsig.project.documents.table.IOperator; |
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10 | |||
11 | /**
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12 | * @author Vicente Caballero Navarro
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13 | */
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14 | public class Random extends AbstractOperator{ |
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15 | |||
16 | public String addText(String s) { |
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17 | return s.concat(toString()+"()"); |
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18 | } |
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19 | public String toString() { |
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20 | return "random"; |
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21 | } |
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22 | public void eval(BSFManager interpreter) throws BSFException { |
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23 | 13444 | caballero | // interpreter.eval(ExpressionFieldExtension.BEANSHELL,null,-1,-1,"double random(){return java.lang.Math.random();};");
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24 | interpreter.exec(ExpressionFieldExtension.JYTHON,null,-1,-1,"def random():\n" + |
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25 | " import java.lang.Math\n" +
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26 | " return java.lang.Math.random()");
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27 | 10229 | caballero | } |
28 | public boolean isEnable() { |
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29 | return (getType()==IOperator.NUMBER);
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30 | } |
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31 | 13444 | caballero | public String getTooltip(){ |
32 | return PluginServices.getText(this,"operator")+": "+addText("")+"\n"+getDescription(); |
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33 | } |
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34 | public String getDescription() { |
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35 | return PluginServices.getText(this, "returns") + ": " + |
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36 | PluginServices.getText(this, "numeric_value") + "\n" + |
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37 | PluginServices.getText(this, "description") + ": " + |
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38 | "Returns a double value with a positive sign, greater than or equal to 0.0 and less than 1.0. Returned values are chosen pseudorandomly with (approximately) uniform distribution from that range.";
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39 | } |
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40 | 10229 | caballero | } |