Bug 122173 Can't drag and drop a data set column to report design layout editor
With 20051227's build, I can't bind a data set column to a table cell by drag & drop it from data explorer. This is a show stopper that we need to have it fixed.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DNDUtil.java
{
			return handleValidateTargetCanContainMore(
					( (StructuredSelection) targetObj ).toArray( ), length );
		}
		if ( targetObj instanceof Object[] )
		{
			Object[] array = (Object[]) targetObj;
			for ( int i = 0; i < array.length; i++ )
			{
				if ( !handleValidateTargetCanContainMore( array[i], length ) )
				{
					return false;
				}
			}
			return true;
		}
		targetObj = unwrapToModel( targetObj );
		if ( targetObj instanceof SlotHandle )
		{
			SlotHandle slot = (SlotHandle) targetObj;
			return slot.getElementHandle( ).getDefn( ).getSlot(
					slot.getSlotID( ) ).isMultipleCardinality( )
					|| slot.getCount( ) < 1 && length <= 1;
		}
		return targetObj instanceof DesignElementHandle
				|| targetObj instanceof EmbeddedImageNode;
	}
	/**
	 * Validates target elements can contain specified type of transfer data
	 *