Bug 129144 Support suppressDuplicates property on table row in report engine
See 129143 for detail. This only needs to be supported for data item in a detail row of a table.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/ExecutorManager.java
public static final int DATAITEM = 7;
	public static final int EXTENDEDITEM = 8;
	/**
	 * the number of suppported executor
	 */
	public static final int NUMBER = 9;
	protected static Logger log = Logger.getLogger( ExecutorManager.class
			.getName( ) );
	/**
	 * execution context
	 */
	protected ExecutionContext context;
	/**
	 * report executor visitor
	 */
	protected IReportItemVisitor visitor;
	/**
	 * array of free list
	 */
	protected LinkedList[] freeList = new LinkedList[NUMBER];
	/**
	 * constructor
	 * 
	 * @param context
	 * @param visitor
	 */
	public ExecutorManager( ExecutionContext context, IReportItemVisitor visitor )
	{
		this.context = context;
		this.visitor = visitor;