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BAEL-2520 code moved to java-jpa module (#6525)

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* BAEL-2520 code changes done

* BAEL-2520 moved code to java-jpa module

* BAEL-2520 moved code to java-jpa module
This commit is contained in:
Sumeet Gajbhar
2019-03-12 22:11:02 +05:30
committed by maibin
parent 2cdae3f8b9
commit 527e3440ac
9 changed files with 297 additions and 244 deletions
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persistence-modules/spring-data-jpa/src/main/java/com/baeldung/dao/repositories/CustomItemRepository.java
-5
View File
@@ -1,7 +1,5 @@
package com.baeldung.dao.repositories;
import java.util.List;
import org.springframework.stereotype.Repository;
import com.baeldung.domain.Item;
@@ -15,7 +13,4 @@ public interface CustomItemRepository {
void findThenDelete(Long id);
List<Item> findItemsByColorAndGrade();
List<Item> findItemByColorOrGrade();
}
persistence-modules/spring-data-jpa/src/main/java/com/baeldung/dao/repositories/impl/CustomItemRepositoryImpl.java
-55
View File
@@ -1,12 +1,6 @@
package com.baeldung.dao.repositories.impl;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
@@ -36,53 +30,4 @@ public class CustomItemRepositoryImpl implements CustomItemRepository {
entityManager.remove(item);
}
@Override
public List<Item> findItemsByColorAndGrade() {
CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
CriteriaQuery<Item> criteriaQuery = criteriaBuilder.createQuery(Item.class);
Root<Item> itemRoot = criteriaQuery.from(Item.class);
Predicate predicateForBlueColor = criteriaBuilder.equal(itemRoot.get("color"), "blue");
Predicate predicateForRedColor = criteriaBuilder.equal(itemRoot.get("color"), "red");
Predicate predicateForColor = criteriaBuilder.or(predicateForBlueColor, predicateForRedColor);
Predicate predicateForGradeA = criteriaBuilder.equal(itemRoot.get("grade"), "A");
Predicate predicateForGradeB = criteriaBuilder.equal(itemRoot.get("grade"), "B");
Predicate predicateForGrade = criteriaBuilder.or(predicateForGradeA, predicateForGradeB);
// final search filter
Predicate finalPredicate = criteriaBuilder.and(predicateForColor, predicateForGrade);
criteriaQuery.where(finalPredicate);
List<Item> items = entityManager.createQuery(criteriaQuery)
.getResultList();
return items;
}
@Override
public List<Item> findItemByColorOrGrade() {
CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
CriteriaQuery<Item> criteriaQuery = criteriaBuilder.createQuery(Item.class);
Root<Item> itemRoot = criteriaQuery.from(Item.class);
Predicate predicateForBlueColor = criteriaBuilder.equal(itemRoot.get("color"), "red");
Predicate predicateForGradeA = criteriaBuilder.equal(itemRoot.get("grade"), "D");
Predicate predicateForBlueColorAndGradeA = criteriaBuilder.and(predicateForBlueColor, predicateForGradeA);
Predicate predicateForRedColor = criteriaBuilder.equal(itemRoot.get("color"), "blue");
Predicate predicateForGradeB = criteriaBuilder.equal(itemRoot.get("grade"), "B");
Predicate predicateForRedColorAndGradeB = criteriaBuilder.and(predicateForRedColor, predicateForGradeB);
// final search filter
Predicate finalPredicate = criteriaBuilder.or(predicateForBlueColorAndGradeA, predicateForRedColorAndGradeB);
criteriaQuery.where(finalPredicate);
List<Item> items = entityManager.createQuery(criteriaQuery)
.getResultList();
return items;
}
}