Revision 44750 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/date/DateFunction.java

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DateFunction.java
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import java.text.SimpleDateFormat;
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import java.util.Date;
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import org.apache.commons.lang3.Range;
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import static org.gvsig.expressionevaluator.ExpressionBuilder.FUNCTION_DATE;
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import org.gvsig.expressionevaluator.Interpreter;
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import org.gvsig.expressionevaluator.spi.AbstractFunction;
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import static org.gvsig.expressionevaluator.ExpressionBuilder.FUNCTION_DATE;
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public class DateFunction extends AbstractFunction {


  		




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    public DateFunction() {


  		




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        super("Date", FUNCTION_DATE,Range.between(1,2),


  		




  
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        super("Date", FUNCTION_DATE,Range.is(1),


  		




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            "Returns a date from the arguments",


  		




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            FUNCTION_DATE+"({{date}}, format)",


  		




  
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            FUNCTION_DATE+"({{date}})",


  		




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            new String[]{


  		




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                "date - a string with a date",


  		




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                "format - Optional. Format to use to parse the date"


  		




  
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                "date - a string with a date"


  		




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            },


  		




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            "Date"


  		




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        );


  		




  ......




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            return x;


  		




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        }


  		




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        String date = getStr(args, 0);


  		




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        String format = null;


  		




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        if( args.length==2 ) {


  		




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            format = getStr(args, 1);


  		




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        }


  		




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        SimpleDateFormat df = new SimpleDateFormat();


  		




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        if( format != null ) {


  		




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            df.applyPattern(format);


  		




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        }


  		




  
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        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");


  		




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        try {


  		




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            Date x = df.parse(date);


  		




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            x.setHours(0);


  		




  ......




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            x.setSeconds(0);


  		




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            return x;


  		




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        } catch (ParseException ex) {


  		




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            throw new RuntimeException("Can't parse date value '"+date+"' with format '"+format==null?"":format+"'", ex);


  		




  
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            throw new RuntimeException("Can't parse date value '"+date+"', expected format 'yyyy-MM-dd'.", ex);


  		




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        }


  		




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    }


  		












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