Revision 44853 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/ForeingValueFunction.java

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ForeingValueFunction.java
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import org.gvsig.expressionevaluator.ExpressionRuntimeException;
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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 org.gvsig.fmap.dal.DataManager;
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import static org.gvsig.fmap.dal.DataManager.FUNCTION_CURRENT_ROW;
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import static org.gvsig.fmap.dal.DataManager.FUNCTION_FOREING_VALUE;
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import org.gvsig.fmap.dal.feature.Feature;
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import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor;
......
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import org.gvsig.tools.util.UnmodifiableBasicListAdapter;
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import org.gvsig.tools.util.UnmodifiableBasicListArrayAdapter;
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public class ForeingValueFunction extends AbstractFunction {


  		




  
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public class ForeingValueFunction extends AbstractFeatureFunction {


  		




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  public ForeingValueFunction() {


  		




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    super(


  		




  ......




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    );


  		




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  }


  		




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  private Feature current_row(Interpreter interpreter) {


  		




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    try {


  		




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      Feature f = (Feature) interpreter.call(FUNCTION_CURRENT_ROW);


  		




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      return f;


  		




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    } catch (Exception ex) {


  		




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      return null;


  		




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    }


  		




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  }


  		




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  @Override


  		




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  public Object call(Interpreter interpreter, Object[] args) throws Exception {


  		




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    UnmodifiableBasicList<String> fieldNames;


  		




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    switch( args.length) {


  		




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      case 1:


  		




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        Object fields_o = getObject(args, 0);


  		




  
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        if( fields_o == null ) {


  		




  
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          throw new ExpressionRuntimeException("Problems calling '" + DataManager.FUNCTION_FOREING_VALUE + "' function, type of parameter 'null' not supported, use string or list.");


  		




  
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        }


  		




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        if (fields_o instanceof String[]) {


  		




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          fieldNames = new UnmodifiableBasicListArrayAdapter<>((String[]) fields_o);


  		




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        } else if (fields_o instanceof List) {


  		












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