Bug 122869 Drag a parameter from data explorer view into a table in library, a new parameter is created automatically.
Description:Drag a parameter from data explorer view into a table in library, a new parameter is created automatically. Steps to reproduce: 1. Add a cascading parameter and a table in a library file. 2. Drag a parameter from data explorer view into a table cell in layout editor. 3. Find that a new parameter was added in data explorer view automatically.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/palette/BasePaletteFactory.java
{
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.birt.designer.internal.ui.editors.schematic.tools.IToolHandleExtends#preHandleMouseDown()
		 */
		public boolean preHandleMouseUp( )
		{
			if ( getRequest( ).getNewObjectType( ) instanceof DataSetHandle )
			{
				try
				{
					
					Object newObj = getRequest( ).getNewObject( );
					if ( newObj instanceof Object[]
							&& ( (Object[]) newObj ).length > 0 )
					{
						newObj = ( (Object[]) newObj )[0];
					}
					DesignElementHandle elementHandle = (DesignElementHandle) newObj;
					if ( elementHandle.getRoot( ) instanceof LibraryHandle )
					{
						ModuleHandle moduleHandle = SessionHandleAdapter.getInstance( )
								.getReportDesignHandle( );