How to Inject a Function inside a set of classes

Asked Jan 21 '15 at 11:07

Active Jan 21 '15 at 11:07

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I have a usecase where i want a particular class or a spring bean to be injected in a set of classes that have a particular annotation. Basically i want a few set of methods to be added to the annotated classes.

Suppose i have a class annotated with annotation @Finders. Then i want the class to be able to use some predefined methods like findById(), findByName() etc to be available to the class and we should be able to call these functions in a static context like

User.findById() and so on.

Is there a way to inject these methods to the class using Java or Spring. Can i use reflection to do this.

Is there any other way i can get this done in java.

asked Jan 21 '15 at 11:07

Ekansh Rastogi

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Related (duplicate?): http://stackoverflow.com/questions/6680674/can-a-java-class-add-a-method-to-itself-at-runtime – sp00m Jan 21 '15 at 11:11
Can you use Java 8? This sounds something that implementable interfaces can be useful for. Also, by only reading the title, that is really near to what subclassing provides. – Attila Neparáczki Jan 21 '15 at 11:46
yes i am open to use java 8 – Ekansh Rastogi Jan 21 '15 at 11:50
You're up for an over-engineered world of pain by taking this approach. Subclass of create a static helper class. – Nick Vasic Jan 21 '15 at 11:52
i am actually looking forward to create a orm layer for the elastic search, so that i may be able to use it as a database – Ekansh Rastogi Jan 21 '15 at 13:40

How to Inject a Function inside a set of classes

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