git.gumartinm.name Git - JavaForFun/blob

   1 package de.spring.example.services.impl;
   2
   3 import javax.inject.Inject;
   4 import javax.inject.Named;
   5
   6 import org.resthub.common.service.CrudServiceImpl;
   7 import org.springframework.data.domain.Page;
   8 import org.springframework.data.domain.Pageable;
   9
  10 import com.querydsl.core.types.dsl.BooleanExpression;
  11
  12 import de.spring.example.persistence.domain.AdDescription;
  13 import de.spring.example.persistence.domain.QAdDescription;
  14 import de.spring.example.persistence.repository.AdDescriptionRepository;
  15 import de.spring.example.services.AdDescriptionService;
  16
  17 @Named("adDescriptionService")
  18 public class AdDescriptionServiceImpl
  19         extends CrudServiceImpl<AdDescription, Long, AdDescriptionRepository>
  20         implements AdDescriptionService {
  21
  22         @Override
  23         @Inject
  24     public void setRepository(AdDescriptionRepository repository) {
  25         this.repository = repository;
  26     }
  27
  28         // Extending CrudServiceImpl when we need some business logic. Otherwise we would be using
  29         // the JPA repositories and nothing else :)
  30
  31         // In this case there is any business logic, but this is just an example.
  32
  33
  34         /**
  35          * Using Querydsl. Giving some business logic to this service :)
  36          *
  37          * Querydsl: fluent interface done easy. There is no effort because it is already implemented.
  38          *
  39          * Criteria using Specifications requires some effort.
  40          *
  41          * See: de.spring.example.services.impl.AdServiceImpl
  42          */
  43         @Override
  44         public Page<AdDescription> queryDslExample(Pageable pageRequest) {
  45                 final QAdDescription adDescription = QAdDescription.adDescription1;
  46                 final BooleanExpression adDescriptionHasAdLink = adDescription.adLink.contains("gumartinm");
  47                 final BooleanExpression adDescriptionHasDescription = adDescription.adDescription.contains("babucha");
  48                 /**
  49                  * https://github.com/spring-projects/spring-data-envers/pull/45
  50                  * return repository.findAll(adDescriptionHasAdLink.and(adDescriptionHasDescription), pageRequest);
  51                  */
  52                 return null;
  53         }
  54 }