feat: Add interfaces for CRUD services

vaadin-spring/src/main/java/com/vaadin/flow/spring/data/jpa/CrudRepositoryService.java

@@ -15,19 +15,6 @@
 public class CrudRepositoryService<T, ID, R extends CrudRepository<T, ID> & JpaSpecificationExecutor<T>>
         extends ListRepositoryService<T, ID, R> implements CrudService<T, ID> {
 
-    /**
-     * Creates the service using the given repository and filter converter.
-     *
-     * @param repository
-     *            the JPA repository
-     * @param jpaFilterConverter
-     *            the JPA filter converter
-     */
-    public CrudRepositoryService(R repository,
-            JpaFilterConverter jpaFilterConverter) {
-        super(repository, jpaFilterConverter);
-    }
-
     /**
      * Creates the service using the given repository.
      *

vaadin-spring/src/main/java/com/vaadin/flow/spring/data/jpa/JpaFilterConverter.java

@@ -8,7 +8,7 @@
 import com.vaadin.flow.spring.data.filter.PropertyStringFilter;
 
 /**
- * Utility class for converting Hilla {@link Filter} specifications into JPA
+ * Utility class for converting {@link Filter} specifications into JPA
  * filter specifications. This class can be used to implement filtering for
  * custom {@link com.vaadin.flow.spring.data.ListService} or
  * {@link com.vaadin.flow.spring.data.CrudService} implementations that use JPA
@@ -33,7 +33,7 @@ public class JpaFilterConverter {
      *            the entity class
      * @return a JPA filter specification for the given filter
      */
-    public <T> Specification<T> toSpec(Filter rawFilter, Class<T> entity) {
+    public static <T> Specification<T> toSpec(Filter rawFilter, Class<T> entity) {
         if (rawFilter == null) {
             return Specification.anyOf();
         }

vaadin-spring/src/main/java/com/vaadin/flow/spring/data/jpa/ListRepositoryService.java

@@ -22,8 +22,6 @@
 public class ListRepositoryService<T, ID, R extends CrudRepository<T, ID> & JpaSpecificationExecutor<T>>
         implements ListService<T>, GetService<T, ID>, CountService {
 
-    private final JpaFilterConverter jpaFilterConverter;
-
     private final R repository;
 
     private final Class<T> entityClass;
@@ -33,26 +31,12 @@ public class ListRepositoryService<T, ID, R extends CrudRepository<T, ID> & JpaS
      *
      * @param repository
      *            the JPA repository
-     * @param jpaFilterConverter
-     *            the JPA filter converter
      */
-    public ListRepositoryService(R repository,
-            JpaFilterConverter jpaFilterConverter) {
-        this.jpaFilterConverter = jpaFilterConverter;
+    public ListRepositoryService(R repository) {
         this.repository = repository;
         this.entityClass = resolveEntityClass();
     }
 
-    /**
-     * Creates the service using the given repository.
-     *
-     * @param repository
-     *            the JPA repository
-     */
-    public ListRepositoryService(R repository) {
-        this(repository, new JpaFilterConverter());
-    }
-
     /**
      * Accessor for the repository instance.
      *
@@ -98,7 +82,7 @@ public long count(@Nullable Filter filter) {
      * @return a JPA specification
      */
     protected Specification<T> toSpec(@Nullable Filter filter) {
-        return jpaFilterConverter.toSpec(filter, entityClass);
+        return JpaFilterConverter.toSpec(filter, entityClass);
     }
 
     @SuppressWarnings("unchecked")