Bug 116706 Bad Class Cast in IDEReportEditor.java
So I'm trying to open a report with BIRT/Eclipse API using the BIRT 2.0 nightly build code (as of 11/16/2005). the file IDEReportEditor.java method private IFile getFile( IEditorInput input ) { return ( (ReportFileEditorInput) input ).getFile( ); } However, input can be ReportEditorInput which is also an IEditorInput (to support reports found outside projects and workspaces) which doesn't even have a getFile() method on it. This causes a deeply nested exception that causes the report desinger to not be able to show a report that might be physically located outside a workspace.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
* 
	 * @param parent
	 *            The parent of the new group, it should be a table or a list
	 *            and should not be null.
	 * @return true if the group created successfully, false if the creation is
	 *         cancelled or some error occurred.
	 */
	public static boolean createGroup( DesignElementHandle parent )
	{
		Assert.isNotNull( parent );
		try
		{
			return addGroup( parent, -1 );
		}
		catch ( SemanticException e )
		{
			ExceptionHandler.handle( e );
			return false;
		}
	}
	/**
	 * Creates a new group in the position under the given parent
	 * 
	 * @param parent
	 *            The parent of the new group, it should be a table or a list
	 *            and should not be null.
	 * @param position
	 *            insert position
	 * @return true if the group created successfully, false if the creation is
	 *         cancelled or some error occurred.