I am trying to find a specific object. I'm using the following code, but it seem like get only sends back a Boolean that verifies that there is a key with this name, but not an array of Boolean values that I need to use in my program:
private Map<User, ArrayList<Boolean>> userDayOfVacationMap;
public ArrayList<Boolean> getUserVacationList(User key){
return this.userDayOfVacationMap.get(key);
}
Is there a method for this?
Here is the User object:
#Entity
public class User {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
private String firstName;
private String lastName;
#OneToMany(mappedBy="user", cascade = CascadeType.ALL)
public Set<Vacation> vacations;
public User(String firstName, String lastName) {
this.firstName=firstName;
this.lastName=lastName;
}
public User(){}
public Set<Vacation> getVacations() {
return vacations;
}
public void setId(int id){
this.id = id;
}
public Integer getId(){
return this.id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
}
However, I can't add a variable in this function, because it would add non-useful information into my database.
Related
and i am getting:
org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]:
Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory;
nested exception is org.hibernate.MappingException: Could not determine type for: com.xib.assessment.model.Team, at table: agent, for columns: [org.hibernate.mapping.Column(team)]
below is my Agent.java
private Long id;
private String firstName;
private String lastName;
private String idNumber;
private Team team;
#Column(name="team")
public Team getTeam() {
return team;
}
public void setTeam(Team team) {
this.team = team;
}
#OneToOne
private Manager manager;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Manager getManager() {
return manager;
}
public void setManager(Manager manager) {
this.manager = manager;
}
public String getIdNumber() {
return idNumber;
}
public void setIdNumber(String idNumber) {
this.idNumber = idNumber;
}
team.java
private Long teamId;
public Long getTeamId() {
return teamId;
}
public void setTeamId(Long teamId) {
this.teamId = teamId;
}
private String name;
#Column(name="agent")
private Agent agent;
#Column(name="manager")
public Manager getManager() {
return manager;
}
public void setManager(Manager manager) {
this.manager = manager;
}
#OneToOne
Manager manager;
public Agent getAgent() {
return agent;
}
public Team() {
super();
}
public void setAgent(Agent agent) {
this.agent = agent;
}
public Team(Long teamId, String name, Agent agent) {
this.teamId = teamId;
this.name = name;
this.agent = agent;
}
public String getName() {
return name;
}
public void setName(String name) {
}
manager.java
#Id
#GeneratedValue
private Long managerId;
private Team team;
#Column(name="team")
public Team getTeam() {
return team;
}
public void setTeam(Team team) {
this.team = team;
}
public Manager(Long managerId, Team team, String firstName, String lastName, String idNumber) {
super();
this.managerId = managerId;
this.team = team;
this.firstName = firstName;
this.lastName = lastName;
this.idNumber = idNumber;
}
public Manager() {
}
public String getFirstName() {
return firstName;
}
public Long getManagerId() {
return managerId;
}
public void setManagerId(Long managerId) {
this.managerId = managerId;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getIdNumber() {
return idNumber;
}
public void setIdNumber(String idNumber) {
this.idNumber = idNumber;
}
private String firstName;
private String lastName;
private String idNumber;
where :A manager can manage multiple teams, and any one team can be managed by at most 2 managers.
and : An agent can be assigned to only one team and reports to one manager.
how do you use hibernate to map the above , thank you in advance
This is an example for Team and Manager. Follow it with code style please
#Entity
class Manager {
#Id
#GeneratedValue
private Long id;
#OneToMany(mappedBy = "manager", fetch = FetchType.LAZY)
private List<Team> teams = new ArrayList<>();
}
#Entity
class Team {
#Id
#GeneratedValue
private Long id;
#ManyToOne(fetch = FetchType.LAZY)
private Manager manager;
}
Mixed field and method mapping
Don't mix mapping annotations on fields and methods. You will have unclear errors in that case.
Also you can learn a bit here
what is #JoinColumn and how it is used in Hibernate
Better to experiment with mappings using console application and checking SQL generated by Hibernate. You can use unit tests from this project for that
https://github.com/v-ladynev/hibernate-experimental
I am trying to learn spring data elasticsearch, and created a sample project. Right now, I am trying to get familiar with the mechanics of sorting.
Simply put, I have a Person class, that has a firstName and lastName field. I am trying to sort on the lastNameField.
Here is my Person class:
#Document(indexName = "entities", type = "person", shards=1, replicas=0)
public class Person {
#Id
private String id;
#Field(type=FieldType.String, index=FieldIndex.not_analyzed)
private String firstName;
#Field(type=FieldType.String, index=FieldIndex.not_analyzed)
private String lastName;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
}
Here is my DAO logic:
#Override
public Page<Person> getPeople(int pageNumber, int pageSize, Direction direction, String...sortFields) {
return personRepository.findAll(new PageRequest(pageNumber, pageSize, direction, sortFields));
}
The personRepository is an empty interface that extends PagingAndSortingRepository
And the actual call:
int pageSize = 1;
int currentPageNumber = -1;
boolean morePages = true;
while(morePages){
Page<Person> results = personDataHandler.getPeople(currentPageNumber+1, pageSize, Direction.DESC, "firstName");
List<Person> people = results.getContent();
if(!CollectionUtils.isEmpty(people)){
for(Person currentPerson: people){
System.out.println("[firstName: "+currentPerson.getFirstName()+", lastName: "+currentPerson.getLastName()+"]");
}
}
currentPageNumber++;
morePages = results.hasNext();
}
Could having a page size of 1 be the issue?
i have a MySQL database which is updated from Java with Entities.
I need a join table between two tables which contains 3 columns.
1 column from table Bar ("bar_id")
2 columns from table Owner ("owner_id", "bought")
Could you please tell me if that is possible or how I could realize that.
I want a join table which looks like this:
'bar_id' | 'owner_id' | 'bought'
--------------------------------
BaseEntity.java
#MappedSuperclass
public class BaseEntity {
private int id;
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
public int getId(){ return this.id; }
public void setId(int id){ this.id = id; }
}
Bar.java
#Entity
#Table(name="bar")
public class Bar extends BaseEntity{
private String name;
private String bought;
private List<Fan> fan;
private List<Owner> owner;
#Column(name="name")
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
#Column(name="bought")
public String getBought() {
return bought;
}
public void setBought(String bought) {
this.bought = bought;
}
#ManyToMany(mappedBy="bar", targetEntity=Owner.class)
public List<Owner> getOwner() {
return owner;
}
public void setOwner(List<Owner> owner) {
this.owner = owner;
}
#ManyToMany
#JoinColumn(name="fan")
public List<Fan> getFan() {
return fan;
}
public void setFan(List<Fan> fan) {
this.fan = fan;
}
}
Owner.java
#Entity
#Table(name="owner")
public class Owner extends BaseEntity{
private String firstname;
private String lastname;
private String birthday;
private java.sql.Date bought;
private List<Bar> bar;
#Column(name="firstname")
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
#Column(name="lastname")
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
#Column(name="birthday")
public String getBirthday() {
return birthday;
}
public void setBirthday(String birthday) {
this.birthday = birthday;
}
#Column(name="bought")
public java.sql.Date getBought() {
return bought;
}
public void setBought(java.sql.Date bought) {
this.bought = bought;
}
#ManyToMany
#JoinColumn(name="bar")
public List<Bar> getBar() {
return bar;
}
public void setBar(List<Bar> bar) {
this.bar = bar;
}
}
You can create a Join table by the using #JoinTable annotation.
Please have a look at this post which explains how to achieve it.
How to create join table with JPA annotations?
I am using Spring boot and trying to implement many to many relationship between User and Skill. I have a table users_skills with columns user_id and skill_id. I keep getting "JoinColumn cannot be resolved to a type" error in #JoinColumn annotations in STS when trying to implement the relationship. Below is my User class
#Entity
#Table(name = "users")
public class User {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private long id;
private String email;
private String firstName;
private String lastName;
private List<Skill> skills = new ArrayList<Skill>();
protected User() {}
public User(String email,String firstName, String lastName) {
this.email = email;
this.firstName = firstName;
this.lastName = lastName;
}
public Long getId() {
return this.id;
}
public void setId(Long id) {
this.id = id ;
}
public String getEmail() {
return this.email;
}
public void setEmail(String email) {
this.email = email ;
}
public String getFirstName() {
return this.firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName ;
}
public String getLastName() {
return this.lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName ;
}
#ManyToMany
#JoinTable(name="users_skills",
joinColumns={#JoinColumn(name="user_id")},
inverseJoinColumns={#JoinColumn(name="skill_id")})
public List<Skill> getSkills(){
return skills;
}
public void setSkills(List<Skill> skills) {
this.skills = skills ;
}
}
Just write this at the head of your class
import javax.persistence.JoinColumn;
Sometime eclipse doesn't show the link to import it in context menu, but it's there. Hope it will help someone.
The below data is stored in MongoDB. I am using Spring-Data and storing the data into mongoDB.
If I want to retrieve the fields ("id" or "Name") I can able to do, but if I want to retrieve the sub fields ("firstName" or "lastName")I can't.
(eg.)If I want to retrieve sub field "lastName" from the below data I can't.Can anyone help me in this regards.
Thanks in advance.
Data Stored in MongoDB:
{
"id":101,
"name": {"firstName":"Mark",
"lastName":"Antony"
}
}
The Code I am using is:
PersonService.java
public List<Audit> searchPerson(Audit audit)
{
List<NameDetails> name=audit.getName();
return mongoTemplate.find(new Query(Criteria.where("name.lastName").is(name.get(0))), Audit.class,COLLECTION_NAME);
}
PersonController.java
#RequestMapping(value = "/person/search", method = RequestMethod.GET)
public String search(#ModelAttribute Audit audit, ModelMap model) {
model.addAttribute("personList", personService.searchPerson(audit));
return "output";
}
Audit.java
#Document
public class Audit {
#Id
private String id;
private List<NameDetails> name;
public String getId() {
System.out.println("Person: getId");
return id;
}
public void setId(String id) {
System.out.println("Person: setId");
this.id = id;
}
public List<NameDetails> getName() {
System.out.println("Audit: getName");
return name;
}
public void setName(List<NameDetails> name) {
System.out.println("Audit: setName");
this.name = name;
}
}
NameDetails.java
package com.register.mongo.model;
public class NameDetails {
private String firstName;
private String lastName;
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
System.out.println("NameDetails: setFirstName");
this.firstName = firstName;
}
public String getLastName() {
System.out.println("NameDetails: getLastName");
return lastName;
}
public void setLastName(String lastName) {
System.out.println("NameDetails: setLastName");
this.lastName = lastName;
}
}
(output.jsp)UI Page
<table border="2">
<c:forEach var="person" items="${personList}">
<tr>
<td>${person.id}</td>
</tr>
<tr>
<td>${person.lastName}</td>
</tr>
</c:forEach>
</table>
If i understand well, you should make an extra class and use it in the Audit class
public class NameDetails{
private String FirstName;
private String LastName;
public String getFirstName() {
return id;
}
public void seFirstName(String fisrtName) {
this.FirstName= fisrtName;
}
public String getLastName() {
return LastName;
}
public void setLastName(String LastName) {
this.LastName = LastName;
}
}
and use this class in the Audit.class
#Document
public class Audit {
#Id
private String id;
private List name<NameDetails>;
and then the setters and getters