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
}
	}
	/**
	 * 
	 * @param query
	 * @param measure
	 * @param function
	 * @return
	 */
	private ScriptExpression populateExpression( QueryDefinition query,
			MeasureHandle measure, String function )
	{
		ScriptExpression se = null;
		
		if ( function == null || function.equals( "sum" ) )
		{
			se = new ScriptExpression( "Total.sum("
					+ measure.getMeasureExpression( ) + ",null,"
					+ query.getGroups( ).size( ) + ")" );
		}
		else if ( function.equals( "count" ) )
		{
			se = new ScriptExpression( "Total.count("
					+ "null," + query.getGroups( ).size( ) + ")" );
		}
		else if ( function.equals( "min" ) )
		{
			se = new ScriptExpression( "Total.min("
					+ measure.getMeasureExpression( ) + ",null,"
					+ query.getGroups( ).size( ) + ")" );