Bug 184762 BIRT Model - Enhancments to the level defintion
xtab/org.eclipse.birt.report.item.crosstab.core/src/org/eclipse/birt/report/item/crosstab/core/de/LevelViewHandle.java
* that deal with a <code>FilterCond</code> in the list.
	 * 
	 * @return the iterator for <code>FilterConditionHandle</code> structure
	 *         list
	 */
	public Iterator filtersIterator( )
	{
		PropertyHandle propHandle = handle.getPropertyHandle( FILTER_PROP );
		if ( propHandle == null )
		{
			return Collections.EMPTY_LIST.iterator( );
		}
		return propHandle.iterator( );
	}
	/**
	 * Return the sort type.
	 * 
	 * @return the sort type.
	 */
	public String getSortType( )
	{
		return handle.getStringProperty( SORT_TYPE_PROP );
	}
	/**
	 * Returns the sort direction of this level view. The return value is
	 * defined in <code>DesignChoiceConstants</code> and can be one of:
	 * 
	 * <ul>
	 * <li><code>SORT_DIRECTION_ASC</code>
	 * <li><code>SORT_DIRECTION_DESC</code>