Revision 13444 trunk/extensions/extExpressionField/src/com/iver/cit/gvsig/project/documents/table/operators/Log.java

View differences:

Log.java
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import org.apache.bsf.BSFException;
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import org.apache.bsf.BSFManager;
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import com.iver.cit.gvsig.ExpresionFieldExtension;


  		




  
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import com.iver.andami.PluginServices;


  		




  
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import com.iver.cit.gvsig.ExpressionFieldExtension;


  		




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import com.iver.cit.gvsig.project.documents.table.AbstractOperator;


  		




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import com.iver.cit.gvsig.project.documents.table.IOperator;


  		




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		return "log";


  		




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	}


  		




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	public void eval(BSFManager interpreter) throws BSFException {


  		




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		interpreter.eval(ExpresionFieldExtension.BEANSHELL,null,-1,-1,"double log(double value){return java.lang.Math.log(value);};");


  		




  
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//		interpreter.eval(ExpressionFieldExtension.BEANSHELL,null,-1,-1,"double log(double value){return java.lang.Math.log(value);};");


  		




  
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		interpreter.exec(ExpressionFieldExtension.JYTHON,null,-1,-1,"def log(value):\n" +


  		




  
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				"  import java.lang.Math\n" +


  		




  
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				"  return java.lang.Math.log(value)");


  		




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	}


  		




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	public boolean isEnable() {


  		




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		return (getType()==IOperator.NUMBER);


  		




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	}


  		




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	public String getDescription() {


  		




  
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        return PluginServices.getText(this, "parameter") + ": " +


  		




  
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        PluginServices.getText(this, "numeric_value") + "\n" +


  		




  
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        PluginServices.getText(this, "returns") + ": " +


  		




  
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        PluginServices.getText(this, "numeric_value") + "\n" +


  		




  
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        PluginServices.getText(this, "description") + ": " +


  		




  
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        "Returns the natural logarithm (base e) of a double  value. Special cases:\n" +


  		




  
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        "* If the argument is NaN or less than zero, then the result is NaN.\n" +


  		




  
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        "* If the argument is positive infinity, then the result is positive infinity.\n" +


  		




  
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        "* If the argument is positive zero or negative zero, then the result is negative infinity.";


  		




  
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    }


  		




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}


  		












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