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.ide/src/org/eclipse/birt/report/designer/ui/editors/ReportEditorProxy.java
{
		instance.partBroughtToTop( part );
	}
	public void partClosed( IWorkbenchPart part )
	{
		
		
		if ( part == this )
		{
			SessionHandleAdapter.getInstance( ).clear( instance.getModel( ) );
		}
	}
	public void partDeactivated( IWorkbenchPart part )
	{
		instance.partDeactivated( part );
	}
	public void partOpened( IWorkbenchPart part )
	{
		instance.partOpened( part );
	}
	public void propertyChanged( Object source, int propId )
	{
		firePropertyChange( propId );
	}
	public IEditorPart getEditorPart( )
	{
		return instance;
	}
}