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We now have a refined replica of the EvaluationContextProvider API and SPIs in the org.springframework.data.spel package. It has seen a bit of a Java 8 overhaul by removing the SPI support class in favor of turning most methods in EvaluationContextExtension into default ones. The already existing API has been renamed to QueryMethodEvaluationContextProvider to indicate it's working with additional semantics specific to query methods (i.e. the Parameters metadata). The internals have been refactored to use the new API but still detect implementations of the old EvaluationContextExtension interface. The implementations get wrapped into an adapting proxy to satisfy the new API so that the actual inspection and usage of the extension is now already done using the new APIs. The repository configuration has slightly change so that the creation of the EvaluationContextProvider is now taking place within RepositoryFactoryBeanSupport's implementation of BeanFactoryAware. AbstractMappingContext is now ApplicationContextAware and holds an ExtensionAwareEvaluationContextProvider using the configured ApplicationContext. That EvaluationContextProvider is forwarded to all MutablePersistentEntity instances. BasicPersistentEntity now exposes getEvaluationContext(…) to subclasses to easily create an EvaluationContext using the extension aware infrastructure. Removed DefaultEvaluationContextProvider in favor of a simple constant in QueryMethodEvaluationContextProvider. Related tickets: DATACMNS-1258, DATACMNS-1108.
Spring Data Commons
Spring Data Commons is part of the umbrella Spring Data project that provides shared infrastructure across the Spring Data projects. It contains technology neutral repository interfaces as well as a metadata model for persisting Java classes.
Features
- Powerful Repository and custom object-mapping abstractions
- Support for cross-store persistence
- Dynamic query generation from query method names
- Implementation domain base classes providing basic properties
- Support for transparent auditing (created, last changed)
- Possibility to integrate custom repository code
- Easy Spring integration with custom namespace
Building the project
Prerequisites
- Maven 3
- Java 8 (the project produces Java 6 compatible bytecode but partially integrates with Java 8)
$ git clone https://github.com/spring-projects/spring-data-commons.git
$ cd spring-data-commons
$ mvn clean install
Getting Help
This README as well as the reference documentation are the best places to start learning about Spring Data Commons.
The main project website contains links to basic project information such as source code, JavaDocs, Issue tracking, etc.
For more detailed questions, please refer to spring-data on stackoverflow. If you are new to Spring as well as to Spring Data, look for information about Spring projects.
Contributing to Spring Data Commons
Here are some ways for you to get involved in the community:
- Create JIRA tickets for bugs and new features and comment and vote on the ones that you are interested in.
- Github is for social coding: if you want to write code, we encourage contributions through pull requests from forks of this repository. If you want to contribute code this way, please reference a JIRA ticket as well covering the specific issue you are addressing.
- Watch for upcoming articles on Spring by subscribing to springframework.org
Before we accept a non-trivial patch or pull request we will need you to sign the Contributor License Agreement. Signing the contributor’s agreement does not grant anyone commit rights to the main repository, but it does mean that we can accept your contributions, and you will get an author credit if we do. If you forget to do so, you'll be reminded when you submit a pull request. Active contributors might be asked to join the core team, and given the ability to merge pull requests.