Ogcapi records search

[davidblasby]

I am doing improvement for Searching.

queryables2.mp4

1. Add the queryables endpoint (according to spec):
   • I've put in items from OGC Spec Table 8 and Table 9
   • Will add possibly add more from the Elastic Index JSON (later)
   • see queryables.json

2 Server side processing of the queryables for "smarter" handling:

• See QueryToElastic.java as well as the documentation in queryables.json

3. Will add to my Angular client to allow some searching (not in github yet, will add soon)

---

Summary of changes;

1. I've added queryables.json (and some processing of it - QueryablesService QueryablesController QueryToElastic).

   • you can add to this json file to add more queryables
   • See the documentation (and examples) in the queryables.json file
   • I've added support for most of the OGCAPI spec's recommended queryable
   • I've added support for time-based (date and date_range) queries as well as text and geom queries.

2. I introduced a Query object instead of just moving around individual parts

   • not fully integrated into the non-Queryables (existing) ogcapi search endpoint
   • should make it a bit easier to look at the query as it goes through the system

3. I updated the checkstyle settings so you can add @SuppressWarnings.

   • useful for variables like q, and x-ogc-role that don't start with 2+ lower-case letters
   • no other changes to google_checks.xml (copied to gn_checks.xml)

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How to use Queryables:

Queryables are pretty easy to use;

1. get the queryables definition from the endpoint /collections/<collectionId>/queryables

2. use a query like this;

   • http://localhost:9999/collections/main/items?f=json&title=africa
     * searches in the resourceTitleObject elastic fields (see details in queryables.json)
   • http://localhost:9999/collections/main/items?f=json&time=2007-07-20T21:45:07Z/..
     * searches in the resourceTemporalDateRange elastic field (see details in queryables.json)
   • http://localhost:9999/collections/main/items?f=json&themes=africa
     * searches a large number of fields inside the allKeyworeds elastic field (see details in queryables.json)

See the OGCAPI documentation (also in queryables.json) for how to format date range queries.

[davidblasby]

@josegar74 @fxprunayre - please review before I make it non-draft. Thanks a lot!

[sonarqubecloud]

Quality Gate failed

Failed conditions
1 Security Hotspot

See analysis details on SonarCloud

[davidblasby]

@josegar74 @fxprunayre - I am planning to merge this at the end of the week!

[davidblasby]

@josegar74 @fxprunayre - no one has responded, so I will merge tomorrow evening (european time).