I want to create a REST link for an Employee
entity that will basically be a findByAllFields
query. Of course this should be combined with Page
and Sort
. In order to do that I have implemented the following code:
@Entity
public class Employee extends Persistable<Long> {
@Column
private String firstName;
@Column
private String lastName;
@Column
private String age;
@Column
@Temporal(TemporalType.TIMESTAMP)
private Date hiringDate;
}
So I would like to have lets say a query where I can do:
http://localhost:8080/myApp/employees/search/all?firstName=me&lastName=self&ageFrom=20&ageTo=30&hiringDateFrom=12234433235
So I have the following Repository
@RepositoryRestResource(collectionResourceRel="employees", path="employees")
public interface EmployeeRepository extends PagingAndSortingRepository<Employee, Long>,
JpaSpecificationExecutor<Employee> {
}
Ok so now I need a RestController
@RepositoryRestController
public class EmployeeSearchController {
@Autowired
private EmployeeRepository employeRepository;
@RequestMapping(value = "/employees/search/all/search/all", method = RequestMethod.GET)
public Page<Employee> getEmployees(EmployeeCriteria filterCriteria, Pageable pageable) {
//EmployeeSpecification uses CriteriaAPI to form dynamic query with the fields from filterCriteria
Specification<Employee> specification = new EmployeeSpecification(filterCriteria);
return employeeRepository.findAll(specification, pageable);
}
Ok, obviously this does its job but it is not integrated with HATEOAS. I have attempted to assemble a resource changing the controller to this:
public PagedResources<Resource<Employee>> getEmployees(
PagedResourcesAssembler<Employee> assembler,
EmployeeCriteria filterCriteria, Pageable pageable) {
//EmployeeSpecification uses CriteriaAPI to form dynamic query with the fields from filterCriteria
Specification<Employee> specification = new EmployeeSpecification(filterCriteria);
Page<Employee> employees = employeeRepository.findAll(specification, pageable);
return assembler.toResource(employees);
}
Obviously I'm missing something from the above since it doesnt work and I'm getting the following Exception:
Could not instantiate bean class [org.springframework.data.web.PagedResourcesAssembler]: No default constructor found;
Ok so to make the question clear I am trying to integrate the above resource into the rest of the HATEOAS architecture. I'm not entirely sure if this is the correct approach so any other suggestions are welcome.
EDIT: Here you can see a similar implementation. Please take a look at the configuration, you will see that all but one of the "Person" controllers are working. https://github.com/cgeo7/spring-rest-example
EmployeeCriteria
andEmployeeSpecification
classes? – Chrysoprase