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
{
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.api.IGetParameterDefinitionTask#getParameterDefn(java.lang.String)
	 */
	public IParameterDefnBase getParameterDefn( String name )
	{
		IParameterDefnBase ret = null;
		if ( name == null )
		{
			return ret;
		}
		DesignElementHandle handle = ( (ReportRunnable) runnable ).getDesignHandle( );
		Collection original = getParameters( (ReportDesignHandle)handle, true );
		
		Iterator iter = original.iterator( );
		while ( iter.hasNext( ) )
		{
			ret = getParamDefnBaseByName( (ParameterDefnBase) iter.next( ),
					name );
			if ( ret != null )
				break;
		}
		
		if ( ret != null )
		{
			if ( ret instanceof ScalarParameterDefn )
			{