What is the Specification Pattern

This page summarizes the projects mentioned and recommended in the original post on /r/programming

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  • Spring Data JPA

    Simplifies the development of creating a JPA-based data access layer.

  • 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.

  • InfluxDB

    Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

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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.

  • If you are using Kotlin, kotlin-jpa-specification-dsl provides a very convenient way to generate Specifications from KPropertys.

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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