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
else if ( IReportElementConstants.AUTOTEXT_AUTHOR_PAGE_DATE.equalsIgnoreCase( template )
				|| IReportElementConstants.AUTOTEXT_CONFIDENTIAL_PAGE.equalsIgnoreCase( template )
				|| IReportElementConstants.REPORT_ELEMENT_GRID.equalsIgnoreCase( template ) )
		{
			preHandle = new GridToolExtends( );
		}
		else if ( IReportElementConstants.REPORT_ELEMENT_LABEL.equalsIgnoreCase( template ) )
		{
			preHandle = new LabelToolExtends( );
		}
		else if ( IReportElementConstants.REPORT_ELEMENT_DATA.equalsIgnoreCase( template ) )
		{
			preHandle = new DataToolExtends( );
		}
		else if ( IReportElementConstants.REPORT_ELEMENT_LIST.equalsIgnoreCase( template ) )
		{
			preHandle = new ListToolExtends( );
		}
		else if ( ( template ).startsWith( IReportElementConstants.REPORT_ELEMENT_EXTENDED ) )
		{
			String extensionName = template.substring( IReportElementConstants.REPORT_ELEMENT_EXTENDED.length( ) );
			preHandle = new ExtendedElementToolExtends( extensionName );
		}
		if ( preHandle == null )
		{
			throw new Error( "Don't find the AbstractToolHandleExtends" ); 
		}
		return preHandle;
	}
}