spring query clean up
This commit is contained in:
DOHA
@@ -1,11 +0,0 @@
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package org.baeldung.persistence.dao;
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import java.util.List;
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import org.baeldung.persistence.model.User;
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public interface IUserDAO {
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List<User> searchUser(String first, String last, int minAge);
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void save(User entity);
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}
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@@ -1,43 +0,0 @@
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package org.baeldung.persistence.dao;
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import java.util.List;
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import javax.persistence.EntityManager;
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import javax.persistence.PersistenceContext;
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import javax.persistence.criteria.CriteriaBuilder;
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import javax.persistence.criteria.CriteriaQuery;
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import javax.persistence.criteria.Predicate;
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import javax.persistence.criteria.Root;
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import org.baeldung.persistence.model.User;
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import org.springframework.stereotype.Repository;
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@Repository
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public class UserDAO implements IUserDAO {
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@PersistenceContext
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private EntityManager entityManager;
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@Override
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public List<User> searchUser(final String first, final String last, final int minAge) {
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final CriteriaBuilder builder = entityManager.getCriteriaBuilder();
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final CriteriaQuery<User> query = builder.createQuery(User.class);
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final Root r = query.from(User.class);
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Predicate predicate = builder.conjunction();
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predicate = builder.and(predicate, builder.like(r.get("firstName"), "%" + first + "%"));
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predicate = builder.and(predicate, builder.like(r.get("lastName"), "%" + last + "%"));
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predicate = builder.and(predicate, builder.greaterThanOrEqualTo(r.get("age"), minAge));
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query.where(predicate);
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final List<User> result = entityManager.createQuery(query).getResultList();
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return result;
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}
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@Override
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public void save(final User entity) {
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entityManager.persist(entity);
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}
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}
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@@ -1,9 +0,0 @@
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package org.baeldung.persistence.dao;
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import org.baeldung.persistence.model.User;
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import org.springframework.data.jpa.repository.JpaRepository;
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import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
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public interface UserRepository extends JpaRepository<User, Long>, JpaSpecificationExecutor<User> {
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}
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@@ -1,45 +0,0 @@
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package org.baeldung.persistence.dao;
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import javax.persistence.criteria.CriteriaBuilder;
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import javax.persistence.criteria.CriteriaQuery;
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import javax.persistence.criteria.Predicate;
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import javax.persistence.criteria.Root;
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import org.baeldung.persistence.model.User;
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import org.baeldung.persistence.model.User_;
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import org.springframework.data.jpa.domain.Specification;
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public class UserSpecifications {
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public static Specification<User> firstNameIsLike(final String term) {
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return new Specification<User>() {
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@Override
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public Predicate toPredicate(final Root<User> root, final CriteriaQuery<?> query, final CriteriaBuilder cb) {
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return cb.like(root.get(User_.firstName), "%"+term+"%");
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}
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};
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}
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public static Specification<User> lastNameIsLike(final String term) {
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return new Specification<User>() {
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@Override
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public Predicate toPredicate(final Root<User> root, final CriteriaQuery<?> query, final CriteriaBuilder cb) {
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return cb.like(root.get(User_.lastName), "%" + term + "%");
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}
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};
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}
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public static Specification<User> ageIsGreaterThan(final int minAge) {
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return new Specification<User>() {
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@Override
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public Predicate toPredicate(final Root<User> root, final CriteriaQuery<?> query, final CriteriaBuilder cb) {
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return cb.greaterThanOrEqualTo(root.get(User_.age), minAge);
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}
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};
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}
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}
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@@ -1,96 +0,0 @@
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package org.baeldung.persistence.model;
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import javax.persistence.Entity;
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import javax.persistence.GeneratedValue;
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import javax.persistence.GenerationType;
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import javax.persistence.Id;
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@Entity
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public class User {
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@Id
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@GeneratedValue(strategy = GenerationType.AUTO)
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private Long id;
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private String firstName;
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private String lastName;
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private String email;
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private int age;
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public User() {
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super();
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}
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public Long getId() {
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return id;
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}
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public void setId(final Long id) {
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this.id = id;
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}
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public String getFirstName() {
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return firstName;
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}
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public void setFirstName(final String firstName) {
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this.firstName = firstName;
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}
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public String getLastName() {
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return lastName;
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}
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public void setLastName(final String lastName) {
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this.lastName = lastName;
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}
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public String getEmail() {
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return email;
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}
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public void setEmail(final String username) {
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email = username;
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}
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public int getAge() {
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return age;
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}
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public void setAge(final int age) {
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this.age = age;
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}
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@Override
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public int hashCode() {
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final int prime = 31;
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int result = 1;
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result = prime * result + ((email == null) ? 0 : email.hashCode());
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return result;
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}
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@Override
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public boolean equals(final Object obj) {
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if (this == obj)
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return true;
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if (obj == null)
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return false;
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if (getClass() != obj.getClass())
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return false;
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final User user = (User) obj;
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if (!email.equals(user.email))
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return false;
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return true;
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}
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@Override
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public String toString() {
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final StringBuilder builder = new StringBuilder();
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builder.append("User [firstName=").append(firstName).append("]").append("[lastName=").append(lastName).append("]").append("[username").append(email).append("]");
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return builder.toString();
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}
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}
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@@ -1,11 +0,0 @@
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package org.baeldung.persistence.model;
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import javax.persistence.metamodel.SingularAttribute;
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import javax.persistence.metamodel.StaticMetamodel;
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@StaticMetamodel(User.class)
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public class User_ {
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public static volatile SingularAttribute<User, String> firstName;
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public static volatile SingularAttribute<User, String> lastName;
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public static volatile SingularAttribute<User, Integer> age;
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}
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@@ -1,28 +0,0 @@
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package org.baeldung.persistence.service;
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import java.util.List;
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import org.baeldung.persistence.dao.IUserDAO;
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import org.baeldung.persistence.model.User;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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@Service
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@Transactional
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public class UserService {
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@Autowired
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private IUserDAO dao;
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public UserService() {
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super();
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}
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public void saveUser(final User user) {
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dao.save(user);
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}
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public List<User> searchUser(final String first, final String last, final int minAge) {
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return dao.searchUser(first, last, minAge);
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}
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}
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