Bug 180408 After correct the expression of dimension, NPE throws out and the x-tab can not be previewed anymore[1102]
Description: After correct the expression of level, NPE throws out and the x-tab can not be previewed anymore[1102] Build number: 2.2.0.v20070402-0630 Steps to reproduce: 1, New a cube with two report design 2, New a x-tab using the cube 3, Change the level's name to CUSTOMER_REGION1 4, Preview the report 5, Correct the expression in x-tab: dimension["Customer"]["CUSTOMER_REGION1"] 6, Preview the report Expected result: After step4, the report can not be previewed but not shown up the NPE message After step5 and 6, the report can be previewed successfully Actual result: After step4, NPE pops up After step6, NPE still pops up Error log:
data/org.eclipse.birt.report.data.adapter/src/org/eclipse/birt/report/data/adapter/impl/DataSetIterator.java
{
	
	private boolean started = false;
	private IResultIterator it;
	private ResultMeta metadata;
	/**
	 * Create DataSetIterator for a hierarchy.
	 * 
	 * @param session
	 * @param hierHandle
	 * @throws BirtException
	 */
	public DataSetIterator( DataRequestSession session,
			TabularHierarchyHandle hierHandle ) throws BirtException
	{
		QueryDefinition query = new QueryDefinition( );
		query.setUsesDetails( true );
		query.setDataSetName( hierHandle.getDataSet( ).getName( ) );
		List resultMetaList = new ArrayList( );
		Map levelNameColumnNamePair = new HashMap( );
		this.prepareLevels( query,
				resultMetaList,
				levelNameColumnNamePair,
				hierHandle );
		this.it = session.prepare( query ).execute( null ).getResultIterator( );
		this.populateMeta( levelNameColumnNamePair, resultMetaList );