Revision 44748 trunk/org.gvsig.desktop/org.gvsig.desktop.compat.cdc/org.gvsig.fmap.dal/org.gvsig.fmap.dal.impl/src/main/java/org/gvsig/expressionevaluator/impl/function/dataaccess/ExistsFunction.java

View differences:

ExistsFunction.java
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import org.gvsig.expressionevaluator.Interpreter;
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import org.gvsig.expressionevaluator.impl.DALFunctions;
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import org.gvsig.expressionevaluator.spi.AbstractFunction;
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import static org.gvsig.fmap.dal.DataManager.FUNCTION_EXISTS;
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import org.gvsig.tools.util.UnmodifiableBasicCollection;
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import org.gvsig.tools.util.UnmodifiableBasicCollection64;
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  ......




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    //   NVL2(COALESCE(lista-subselect),FALSE,TRUE)


  		




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    //


  		




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    super(DALFunctions.SYMBOLTABLE_NAME,


  		




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            DALFunctions.FUNCTION_EXISTS,


  		




  
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            FUNCTION_EXISTS,


  		




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            Range.between(1, 2),


  		




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            "Receive a list as an argument. Returns true if the list has some value and false if the list is empty.",


  		




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            DALFunctions.FUNCTION_EXISTS + "({{list}})",


  		




  
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            FUNCTION_EXISTS + "({{list}})",


  		




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            new String[]{


  		




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              "list - a list of values or null"


  		




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            },


  		




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            "Boolean",


  		




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            true


  		




  
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            false


  		




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    );


  		




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  }


  		




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  ......




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      return false;


  		




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    }


  		




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    boolean isEmpty = true;


  		




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    if (list instanceof List) {


  		




  
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    if (list instanceof Object[]) {


  		




  
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      isEmpty = (((Object[]) list).length==0);


  		




  
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    } else if (list instanceof List) {


  		




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      isEmpty = ((List) list).isEmpty();


  		




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    } else if (list instanceof UnmodifiableBasicCollection) {


  		




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      isEmpty = ((UnmodifiableBasicCollection) list).isEmpty();


  		












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