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.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
return getMembers( classInfo, new AlphabeticallyComparator( ) );
	}
	public static List getMembers( IClassInfo classInfo, Comparator comp )
	{
		List members = classInfo.getMembers( );
		Collections.sort( members, comp );
		return members;
	}
	/**
	 * 
	 * Return DesignElementHandle avaliable method's argument type name.
	 * 
	 * @param handle
	 *            DesignElementHandle.
	 * @param methodName
	 * @param argIdex
	 *            starts from 0.
	 * @return
	 */
	public static String getMethodArgumentType( DesignElementHandle handle,
			String methodName, int argIndex )
	{
		if ( handle instanceof DataSetHandle )
			return "DataSet";
		if ( handle instanceof DataSourceHandle )
			return "DataSource";
		List methods = handle.getDefn( ).getLocalMethods( );
		for ( Iterator iter = methods.iterator( ); iter.hasNext( ); )
		{
			IMethodInfo method = ( (ElementPropertyDefn) iter.next( ) )