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calrissian / mango

Common utilities for rapid application development
Apache License 2.0
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Replace Query and Criteria APIs with library support #209

Open eawagner opened 7 years ago

eawagner commented 7 years ago

There are a number of libraries out there that provide a lot of the same functionality of the query and criteria APIs.

That being said, we should probably pick which library support we should use.

I am impartial to JEXL because it provides a very rich AST for representing queries and a very flexible evaluation engine. That being said, it is very very complex in some instances.

Alternatives could also include:

If we chose one we need to distinguish between the definition of a query VS the evaluation of a query. We can use different libraries for each.

eawagner commented 6 years ago

Since having written this, I would suggest looking into using one of the following depending on your use case.

JEXL - java style syntax, with feature rich AST for developing against. Lucene - More use friendly syntax and compatible with lots of popular systems (ElasticSearch, Solr, etc). More complicated AST to work with however. Calcite - SQL syntax support and very feature rich AST. Most complicated than the others but much more feature rich set of capabilities for defining queries.