Bug 209450 [regression]Duplicate values display in Cascading parameter list[0705]
Descripption: Duplicate values display in Cascading parameter list Build number:2.3.0.v20071112 Steps to reproduce: 1. New sample data source and dataset from CUSTOMERS. 2. New a cascading parameter from COUNTRY, STATE AND CITY fields. 3. Preview. Expected result: Values in three parameter list aren't duplicated. Actual result: Duplicate values show in parameter list. Error log:n/a
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/GetParameterDefinitionTask.java
{
		boolean accept( IResultIterator iterator ) throws BirtException;
	}
	
	private class ParameterGroupFilter implements SelectionFilter
	{
		Object[] keyValues;
		String[] valueColumnNames;
		String[] valueTypes;
		
		public ParameterGroupFilter( Object[] keyValues,
				CascadingParameterGroupHandle parameterGroup )
		{
			this.keyValues = keyValues;
			valueColumnNames = new String[keyValues.length];
			valueTypes = new String[keyValues.length];
			SlotHandle parameterSlots = parameterGroup.getParameters( );
			for ( int i = 0; i < keyValues.length; i++ )
			{
				ScalarParameterHandle tempParameter = (ScalarParameterHandle) parameterSlots
						.get( i );
				valueColumnNames[i] = ParameterHelper.getValueColumnName( tempParameter );
				valueTypes[i] = tempParameter.getDataType( );
			}
		}
		
		public boolean accept( IResultIterator iterator ) throws BirtException
		{
			for ( int i = 0; i < valueColumnNames.length; i++ )