Bug 130495 Get rid of SessionHandleAdapter
Now, we use SessionHandleAdapter to keep current active report deisng. That's a bad practive for editor swith and rebuild will cuase lots of problmes. Need find way to replace it.
UI/org.eclipse.birt.report.designer.ui.editors/src/org/eclipse/birt/report/designer/ui/editors/MultiPageReportEditor.java
return path.toFile( ).lastModified( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.forms.editor.FormEditor#dispose()
	 */
	public void dispose( )
	{
		DataSetManager.removeInstance( this.getEditorInput( ) );
		if ( fPalettePage != null )
		{
			fPalettePage.dispose( );
		}
		if ( outlinePage != null )
		{
			outlinePage.dispose( );
		}
		if ( dataPage != null )
		{
			dataPage.dispose( );
		}
		super.dispose( );
	}
	public IEditorPart getEditorPart( )
	{
		return this;
	}
}