Lookups is like a bag of objects, you can have global lookups or local
lookups.
*Globals*
1-*Lookup.getDefault() *- Is default lookup in general it will have all
services that exists on META-INF/services.
2- *Utilities.actionsGlobalContext() *- In this you can have the lookup of
all that have focus on Netbeans
*Ex.:* Utilities.actionsGlobalContext().lookup(FileObject.class);
Will probably give you the file opened that have focus on Netbeans.
*Local*
All other classes that implements Lookup.Provider*. *
TopComponent.getRegistry().getActivated().getLookup(), note that this
lookup probably can have all items of the default with additional items of
the TopComponent, because the constructor of TopComponent receives a lookup.
TopComponent.getRegistry().getActivated().getLookup().lookup(FileObject.class);
Will give you same as
Utilities.actionsGlobalContext().lookup(FileObject.class);
*If I want to lookup all opened files, that mean all DataObjects. What I
should use?*
You must to find what is the default class responsible by editor, is a
TopComponent, so you must get all TopComponent Implementations and get his
lookup.
> var list = TopComponent.getRegistry().getOpened();
> for(TopComponent item : list){
> if(item instanceof CloneableTopComponent){
>
> System.out.println(item.getLookup().lookup(FileObject.class));
> }
> }
>
Probably has other ways, but this way works.
Em ter., 27 de set. de 2022 às 01:00, Peter Cheung <[email protected]>
escreveu:
> Dear All
> I have been super confused by these for many years, what is the
> difference? when I use should which?
>
>
> 1. Lookup.getDefault().lookupAll
> 2.
> DataObject.find(FileUtil.toFileObject(realFile)).getLookup().lookupAll
> 3. Utilities.actionsGlobalContext().lookupAll
> 4. TopComponent.getRegistry().getActivated().getLookup().lookupAll
>
> If I want to lookup all opened files, that mean all DataObjects. What I
> should use?
>
>
> Thanks
>
> From Peter (System Architect, Quantr Limited https://www.quantr.hk ,
> Mobile : 96554595)
>
--
Moacir R.F
Desenvolvedor de Softwares
https://www.moacirrf.com.br <http://www.moacirrf.com.br>
