Bug 180608 [Regression]NPE throws out when preview the result in dataset[07]
Description: [Regression]NPE throws out when preview the result in dataset[07] Build number: 2.2.0.v20070403-0630 Steps to reproduce: 1, Use attached report 2, Edit Data Set 3, Preview the Data Set Expected result: The preview should be success Actual result: NPE throws out Error log:
data/org.eclipse.birt.data.tests/test/org/eclipse/birt/data/engine/binding/FeaturesTest.java
for ( int i = 0; i < bindingNameRow.length; i++ )
			{
				testPrint( evalAsString( bindingNameRow[i], resultIterator ) );
				testPrint( "    " );
			}
			testPrintln( "" );
		}
		checkOutputFile( );
	}
	/**
	 * @throws Exception
	 */
	public void testResultIteratorFindGroup( ) throws Exception
	{
		ComputedColumn computedColumn = new ComputedColumn( "\"doubleQuo\"",
				"row.CITY",
				DataType.STRING_TYPE );
		this.dataSet.addComputedColumn( computedColumn );
		String[] bindingNameGroup = new String[]{
				"GROUP_COUNTRY", "GROUP_CITY", "GROUP_NULL_COLUMN"
		};
		IBaseExpression[] bindingExprGroup = new IBaseExpression[]{
				new ScriptExpression( "dataSetRow[\"COUNTRY\"]" ),
				new ScriptExpression( "dataSetRow[\"\\\"doubleQuo\\\"\"]" ),
				new ScriptExpression( "dataSetRow.NULL_COLUMN" )
		};
		GroupDefinition[] groupDefn = new GroupDefinition[]{
				new GroupDefinition( "group1" ),
				new GroupDefinition( "group2" ),
				new GroupDefinition( "group3" )