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kotlin-jpa-specification-dsl
This library provides a fluent DSL for querying spring data JPA repositories using spring data Specifications (i.e. the JPA Criteria API), without boilerplate code or a generated metamodel.
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I have written some utility functions for composing Specifications in a nicer and safer way, inspired by how QueryDSL composes Predicates. I created a PR in attempt to merge it directly to Spring Data JPA itself (https://github.com/spring-projects/spring-data-jpa/pull/404), but unfortunately it was rejected because the Spring team plans to majorly rework Specifications in the near future (https://github.com/spring-projects/spring-data-jpa/issues/1943#issuecomment-752504333). Feel free to copy the code in my PR for your own use.
If you are using Kotlin, kotlin-jpa-specification-dsl provides a very convenient way to generate Specifications from KPropertys.
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