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Tip: How to Selectively Expose CRUD Operations

See how to use an intermediate interface to expose CRUD operations.


In order to selectively expose CRUD operations, we need to define an intermediate interface, annotated as below:

interface IntermediateRepository extends Repository {

   //  add here the selected CRUD, for example we add only findOne()

   T findOne(ID id);

Further, write your repository as follows:

interface ProductRepository extends IntermediateRepository {
  // only findOne() is visible


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Octavia Andreea Anghel is a senior PHP developer currently working as a primary trainer for programming teams that participate at national and international software-development contests. She consults on developing educational projects at a national level. She is a coauthor of the book "XML Technologies--XML in Java" (Albastra, ISBN 978-973-650-210-1), for which she wrote the XML portions. In addition to PHP and XML, she's interested in software architecture, web services, UML, and high-performance unit tests.
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