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
bindingNameRow,
				bindingExprRow );
		checkOutputFile( );
	}
	/**
	 * Test filters in data sets and query with . The dataset filters should
	 * always be applied before the query filters.
	 */
	public void test15( ) throws Exception
	{
		this.dataSet.addFilter( new FilterDefinition( new ConditionalExpression( "row.AMOUNT",
				ConditionalExpression.OP_BOTTOM_N,
				"7" ) ) );
		String[] bindingNameGroup = new String[2];
		bindingNameGroup[0] = "GROUP_COUNTRY";
		bindingNameGroup[1] = "GROUP_CITY";
		IBaseExpression[] bindingExprGroup = new IBaseExpression[2];
		bindingExprGroup[0] = new ScriptExpression( "dataSetRow.COUNTRY" );
		bindingExprGroup[1] = new ScriptExpression( "dataSetRow.CITY" );
		GroupDefinition[] groupDefn = new GroupDefinition[]{
				new GroupDefinition( "group0" ), new GroupDefinition( "group1" )
		};
		groupDefn[0].setKeyExpression( "row.GROUP_COUNTRY" );
		groupDefn[1].setKeyExpression( "row.GROUP_CITY" );
		String[] bindingNameRow = new String[]{
				"ROW_COUNTRY",
				"ROW_CITY",
				"ROW_SALE_DATE",
				"ROW_AMOUNT",
				"ROW_AMOUNT_2",