How to access page properties from java while filtering the page property ID?

[Luca Eichler]

Hi, I want to parse page properties in my custom macro.

To access it for now I just search for pages with the specified label, parse them and extract the page properties from the rendered table.

However, this approach has the drawback that I cannot access the page property metadata, specifically the page property ID, which I need to filter the found properties. Because of that my current approach does not work for this advanced use case.

I looked into the REST API of the page properties plugin and found a query which does exactly what I want to do, namely /rest/masterdetail/1.0/detailssummary/lines. So now I have two questions:

1. Can I do a REST API query from within the Jira Instance itself? If I can do this, I would use this approach. Otherwise:
2. Is there a way to access page properties from java while filtering by label and page property ID?