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modify query code

This commit is contained in:
DOHA 2015-01-19 22:10:57 +02:00
parent 92e593c2b4
commit 5ce7ecc629
11 changed files with 573 additions and 0 deletions
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12
spring-security-rest-full/src/main/java/org/baeldung/persistence/dao/IUserDAO.java Normal file
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package org.baeldung.persistence.dao;
import java.util.List;
import java.util.Map;
import org.baeldung.persistence.model.User;
public interface IUserDAO {
List<User> searchUser(Map<String, Object> params);
void save(User entity);
}

49
spring-security-rest-full/src/main/java/org/baeldung/persistence/dao/UserDAO.java Normal file
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package org.baeldung.persistence.dao;
import java.util.List;
import java.util.Map;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import org.baeldung.persistence.model.User;
import org.springframework.stereotype.Repository;
@Repository
public class UserDAO implements IUserDAO {
@PersistenceContext
private EntityManager entityManager;
@Override
public List<User> searchUser(final Map<String, Object> params) {
final CriteriaBuilder builder = entityManager.getCriteriaBuilder();
final CriteriaQuery<User> query = builder.createQuery(User.class);
final Root r = query.from(User.class);
Predicate predicate = builder.conjunction();
for (final Map.Entry<String, Object> param: params.entrySet()){
if (param.getKey().equalsIgnoreCase("age")) {
predicate = builder.and(predicate, builder.greaterThanOrEqualTo(r.get(param.getKey()), Integer.parseInt(param.getValue().toString())));
}
else{
predicate = builder.and(predicate, builder.like(r.get(param.getKey()), "%" + param.getValue() + "%"));
}
}
query.where(predicate);
final List<User> result = entityManager.createQuery(query).getResultList();
return result;
}
@Override
public void save(final User entity) {
entityManager.persist(entity);
}
}

9
spring-security-rest-full/src/main/java/org/baeldung/persistence/dao/UserRepository.java Normal file
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package org.baeldung.persistence.dao;
import org.baeldung.persistence.model.User;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
public interface UserRepository extends JpaRepository<User, Long>, JpaSpecificationExecutor<User> {
}

45
spring-security-rest-full/src/main/java/org/baeldung/persistence/dao/UserSpecifications.java Normal file
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package org.baeldung.persistence.dao;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import org.baeldung.persistence.model.User;
import org.baeldung.persistence.model.User_;
import org.springframework.data.jpa.domain.Specification;
public class UserSpecifications {
public static Specification<User> firstNameIsLike(final String term) {
return new Specification<User>() {
@Override
public Predicate toPredicate(final Root<User> root, final CriteriaQuery<?> query, final CriteriaBuilder cb) {
return cb.like(root.get(User_.firstName), "%"+term+"%");
}
};
}
public static Specification<User> lastNameIsLike(final String term) {
return new Specification<User>() {
@Override
public Predicate toPredicate(final Root<User> root, final CriteriaQuery<?> query, final CriteriaBuilder cb) {
return cb.like(root.get(User_.lastName), "%" + term + "%");
}
};
}
public static Specification<User> ageIsGreaterThan(final int minAge) {
return new Specification<User>() {
@Override
public Predicate toPredicate(final Root<User> root, final CriteriaQuery<?> query, final CriteriaBuilder cb) {
return cb.greaterThanOrEqualTo(root.get(User_.age), minAge);
}
};
}
}

46
spring-security-rest-full/src/main/java/org/baeldung/persistence/dao/UserSpecificationsBuilder.java Normal file
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package org.baeldung.persistence.dao;
import static org.baeldung.persistence.dao.UserSpecifications.ageIsGreaterThan;
import static org.baeldung.persistence.dao.UserSpecifications.firstNameIsLike;
import static org.baeldung.persistence.dao.UserSpecifications.lastNameIsLike;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.baeldung.persistence.model.User;
import org.springframework.data.jpa.domain.Specification;
import org.springframework.data.jpa.domain.Specifications;
public class UserSpecificationsBuilder {
public static Specification<User> buildUserSpecs(final Map<String, Object> params) {
if (params.size() == 0)
return null;
final List<Specification<User>> specs = new ArrayList<Specification<User>>();
String key, value;
for (final Map.Entry<String, Object> param : params.entrySet()) {
key = param.getKey();
value = param.getValue().toString();
if (key.equalsIgnoreCase("age")) {
specs.add(ageIsGreaterThan(Integer.parseInt(value)));
} else if (key.equalsIgnoreCase("firstName")) {
specs.add(firstNameIsLike(value));
} else if (key.equalsIgnoreCase("lastName")) {
specs.add(lastNameIsLike(value));
}
}
if (specs.size() == 0)
return null;
Specification<User> result = specs.get(0);
for (int i = 1; i < specs.size(); i++) {
result = Specifications.where(result).and(specs.get(i));
}
return result;
}
}

96
spring-security-rest-full/src/main/java/org/baeldung/persistence/model/User.java Normal file
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package org.baeldung.persistence.model;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public class User {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String firstName;
private String lastName;
private String email;
private int age;
public User() {
super();
}
public Long getId() {
return id;
}
public void setId(final Long id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(final String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(final String lastName) {
this.lastName = lastName;
}
public String getEmail() {
return email;
}
public void setEmail(final String username) {
email = username;
}
public int getAge() {
return age;
}
public void setAge(final int age) {
this.age = age;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((email == null) ? 0 : email.hashCode());
return result;
}
@Override
public boolean equals(final Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
final User user = (User) obj;
if (!email.equals(user.email))
return false;
return true;
}
@Override
public String toString() {
final StringBuilder builder = new StringBuilder();
builder.append("User [firstName=").append(firstName).append("]").append("[lastName=").append(lastName).append("]").append("[username").append(email).append("]");
return builder.toString();
}
}

11
spring-security-rest-full/src/main/java/org/baeldung/persistence/model/User_.java Normal file
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package org.baeldung.persistence.model;
import javax.persistence.metamodel.SingularAttribute;
import javax.persistence.metamodel.StaticMetamodel;
@StaticMetamodel(User.class)
public class User_ {
public static volatile SingularAttribute<User, String> firstName;
public static volatile SingularAttribute<User, String> lastName;
public static volatile SingularAttribute<User, Integer> age;
}

42
spring-security-rest-full/src/main/java/org/baeldung/persistence/service/impl/UserService.java Normal file
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package org.baeldung.persistence.service.impl;
import java.util.List;
import java.util.Map;
import org.baeldung.persistence.dao.IUserDAO;
import org.baeldung.persistence.dao.UserRepository;
import org.baeldung.persistence.dao.UserSpecificationsBuilder;
import org.baeldung.persistence.model.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.jpa.domain.Specification;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
@Service
@Transactional
public class UserService {
@Autowired
private IUserDAO dao;
@Autowired
private UserRepository repository;
public UserService() {
super();
}
public void saveUser(final User user) {
dao.save(user);
}
public List<User> searchUser(final Map<String, Object> params) {
return dao.searchUser(params);
}
public List<User> searchBySpecification(final Map<String, Object> params) {
final Specification<User> spec = UserSpecificationsBuilder.buildUserSpecs(params);
if (spec == null)
return repository.findAll();
return repository.findAll(spec);
}
}

69
spring-security-rest-full/src/main/java/org/baeldung/web/controller/UserController.java Normal file
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package org.baeldung.web.controller;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.baeldung.persistence.model.User;
import org.baeldung.persistence.service.impl.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
public class UserController {
@Autowired
private UserService service;
public UserController() {
super();
}
@RequestMapping(method = RequestMethod.GET, value = "/users")
@ResponseBody
public List<User> findAll(@RequestParam(value = "search", required = false) final String search) {
final Map<String, Object> params = new HashMap<String, Object>();
if (search != null) {
final Pattern pattern = Pattern.compile("(\\w+?):(\\w+?),");
final Matcher matcher = pattern.matcher(search + ",");
while (matcher.find()) {
params.put(matcher.group(1), matcher.group(2));
}
}
return service.searchUser(params);
}
@RequestMapping(method = RequestMethod.GET, value = "/users/spec")
@ResponseBody
public List<User> findAllBySpecification(@RequestParam(value = "search", required = false) final String search) {
final Map<String, Object> params = new HashMap<String, Object>();
if (search != null) {
final Pattern pattern = Pattern.compile("(\\w+?):(\\w+?),");
final Matcher matcher = pattern.matcher(search + ",");
while (matcher.find()) {
params.put(matcher.group(1), matcher.group(2));
}
}
return service.searchBySpecification(params);
}
@RequestMapping(method = RequestMethod.GET, value = "/users/new")
@ResponseBody
public long addUser(@RequestParam("first") final String first, @RequestParam("last") final String last, @RequestParam("age") final int age) {
final User user = new User();
user.setFirstName(first);
user.setLastName(last);
user.setEmail("john@doe.com");
user.setAge(age);
service.saveUser(user);
return user.getId();
}
}

105
spring-security-rest-full/src/test/java/org/baeldung/persistence/query/JPACriteriaQueryTest.java Normal file
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package org.baeldung.persistence.query;
import static org.junit.Assert.assertEquals;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.baeldung.persistence.model.User;
import org.baeldung.persistence.service.impl.UserService;
import org.baeldung.spring.PersistenceConfig;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.support.AnnotationConfigContextLoader;
import org.springframework.test.context.transaction.TransactionConfiguration;
import org.springframework.transaction.annotation.Transactional;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = { PersistenceConfig.class }, loader = AnnotationConfigContextLoader.class)
@Transactional
@TransactionConfiguration
public class JPACriteriaQueryTest {
@Autowired
private UserService userService;
private User userJohn;
private User userTom;
@Before
public void init() {
userJohn = new User();
userJohn.setFirstName("John");
userJohn.setLastName("Doe");
userJohn.setEmail("john@doe.com");
userJohn.setAge(22);
userService.saveUser(userJohn);
userTom = new User();
userTom.setFirstName("Tom");
userTom.setLastName("Doe");
userTom.setEmail("tom@doe.com");
userTom.setAge(26);
userService.saveUser(userTom);
}
@Test
public void givenFirstAndLastName_whenGettingListOfUsers_thenCorrect() {
final Map<String, Object> params = new HashMap<String, Object>();
params.put("firstName", "John");
params.put("lastName", "Doe");
final List<User> result = userService.searchUser(params);
assertEquals(1, result.size());
assertEquals(userJohn.getEmail(), result.get(0).getEmail());
}
@Test
public void givenLast_whenGettingListOfUsers_thenCorrect() {
final Map<String, Object> params = new HashMap<String, Object>();
params.put("lastName", "doe");
final List<User> result = userService.searchUser(params);
assertEquals(2, result.size());
}
@Test
public void givenLastAndAge_whenGettingListOfUsers_thenCorrect() {
final Map<String, Object> params = new HashMap<String, Object>();
params.put("lastName", "doe");
params.put("age", "25");
final List<User> result = userService.searchUser(params);
assertEquals(1, result.size());
assertEquals(userTom.getEmail(), result.get(0).getEmail());
}
@Test
public void givenWrongFirstAndLast_whenGettingListOfUsers_thenCorrect() {
final Map<String, Object> params = new HashMap<String, Object>();
params.put("firstName", "Adam");
params.put("lastName", "Fox");
final List<User> result = userService.searchUser(params);
assertEquals(0, result.size());
}
@Test
public void givenPartialFirst_whenGettingListOfUsers_thenCorrect() {
final Map<String, Object> params = new HashMap<String, Object>();
params.put("firstName", "jo");
final List<User> result = userService.searchUser(params);
assertEquals(1, result.size());
assertEquals(userJohn.getEmail(), result.get(0).getEmail());
}
}

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spring-security-rest-full/src/test/java/org/baeldung/persistence/query/JPASpecificationsTest.java Normal file
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package org.baeldung.persistence.query;
import static org.baeldung.persistence.dao.UserSpecifications.ageIsGreaterThan;
import static org.baeldung.persistence.dao.UserSpecifications.firstNameIsLike;
import static org.baeldung.persistence.dao.UserSpecifications.lastNameIsLike;
import static org.junit.Assert.assertEquals;
import java.util.List;
import org.baeldung.persistence.dao.UserRepository;
import org.baeldung.persistence.model.User;
import org.baeldung.spring.PersistenceConfig;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.jpa.domain.Specifications;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.support.AnnotationConfigContextLoader;
import org.springframework.test.context.transaction.TransactionConfiguration;
import org.springframework.transaction.annotation.Transactional;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = { PersistenceConfig.class }, loader = AnnotationConfigContextLoader.class)
@Transactional
@TransactionConfiguration
public class JPASpecificationsTest {
@Autowired
private UserRepository repository;
private User userJohn;
private User userTom;
@Before
public void init() {
userJohn = new User();
userJohn.setFirstName("John");
userJohn.setLastName("Doe");
userJohn.setEmail("john@doe.com");
userJohn.setAge(22);
repository.save(userJohn);
userTom = new User();
userTom.setFirstName("Tom");
userTom.setLastName("Doe");
userTom.setEmail("tom@doe.com");
userTom.setAge(26);
repository.save(userTom);
}
@Test
public void givenLast_whenGettingListOfUsers_thenCorrect() {
final List<User> result = repository.findAll(lastNameIsLike("doe"));
assertEquals(2, result.size());
}
@Test
public void givenFirstAndLastName_whenGettingListOfUsers_thenCorrect() {
final List<User> result = repository.findAll(Specifications.where(lastNameIsLike("doe")).and(firstNameIsLike("john")));
assertEquals(1, result.size());
assertEquals(userJohn.getEmail(), result.get(0).getEmail());
}
@Test
public void givenLastAndAge_whenGettingListOfUsers_thenCorrect() {
final List<User> result = repository.findAll(Specifications.where(lastNameIsLike("doe")).and(ageIsGreaterThan(25)));
assertEquals(1, result.size());
assertEquals(userTom.getEmail(), result.get(0).getEmail());
}
@Test
public void givenWrongFirstAndLast_whenGettingListOfUsers_thenCorrect() {
final List<User> result = repository.findAll(Specifications.where(lastNameIsLike("Adam")).and(firstNameIsLike("Fox")));
assertEquals(0, result.size());
}
@Test
public void givenPartialFirst_whenGettingListOfUsers_thenCorrect() {
final List<User> result = repository.findAll(firstNameIsLike("jo"));
assertEquals(1, result.size());
assertEquals(userJohn.getEmail(), result.get(0).getEmail());
}
}