Bug 124597 Error message pop up which from length of JS-Expression is error
Details: Error message pop up which from length of JS-Expression is error Setp: 1.New a datasource and dataset contain "row["First"]" 2.Insert a table in layout and a data in details 3.Input "row["FIRST"].length" in data expression 4.Preview Actual result: "FIRST" is a error input words, but it can preview some words in table: org.eclipse.birt.data.engine.script.DataExceptionMocker@1502283 But it has not pop up some error message. Expection result: Pop up an error message
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/ResultIterator.java
if ( JSRowObject.ROW_POSITION.equals( name ) )
					return new Integer( odiResult.getCurrentResultIndex( ) );
				else if ( odiResult.getCurrentResult( ) != null )
					return odiResult.getCurrentResult( )
							.getFieldValue( name );
				else
					return null;
			}
		}
		else
		{
			Context cx = Context.enter();
			try
			{
				return  expr.evaluate( cx, scope );
			}
			finally
			{
				Context.exit();
			}
		}
	}
	
	/*
	 * @see org.eclipse.birt.data.engine.api.IResultIterator#getValue(org.eclipse.birt.data.engine.api.IBaseExpression)
	 */
	public Object getValue( IBaseExpression dataExpr ) throws BirtException
	{
		logger.logp( Level.FINE,