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Data insertion in database using jpa issueing error

I am new to the JPA world. Here I have tried to make a simple POS. The problem is that when there is no predefined value in tables although the PK is auto-incremented, data is not being inserted into DB. But if I set a predefined row into the tables then there are no issues and data is being inserted successfully. please help me.
The following are my Java classes, and I am using Mysql for DB.
#Entity
#Table(name = "card_payment")
public class Card_payment {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
int id;
#OneToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "order_id")
private Orders order;
#Column(name = "issuing_bank")
String issuing_bank;
#Column(name = "card_type")
String card_type;
#Column(name = "card_expiry_date")
String card_expiry_date;
#Column(name = "amount")
int amount;
public Card_payment() {
super();
}
public Orders getOrder() {
return order;
}
public void setOrder(Orders order) {
this.order = order;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getIssuing_bank() {
return issuing_bank;
}
public void setIssuing_bank(String issuing_bank) {
this.issuing_bank = issuing_bank;
}
public String getCard_type() {
return card_type;
}
public void setCard_type(String card_type) {
this.card_type = card_type;
}
public String getCard_expiry_date() {
return card_expiry_date;
}
public void setCard_expiry_date(String card_expiry_date) {
this.card_expiry_date = card_expiry_date;
}
public int getAmount() {
return amount;
}
public void setAmount(int amount) {
this.amount = amount;
}
}
#Entity
#Table(name = "customer")
public class Customer {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
int id;
#Column(name = "name")
String name;
#Column(name = "mobile_no")
long mobile_no;
#Column(name = "address")
String address;
#OneToMany(mappedBy = "customer", cascade = CascadeType.ALL,
fetch=FetchType.LAZY)
private List<Orders> orders;;
public Customer() {
super();
}
public List<Orders> getOrders() {
return orders;
}
public void setOrders(List<Orders> orders) {
this.orders = orders;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public long getMobile_no() {
return mobile_no;
}
public void setMobile_no(long mobile_no) {
this.mobile_no = mobile_no;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
#Entity
#Table(name = "Item")
public class Item {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
int id;
#Column(name = "name")
String name;
#Column(name = "unit")
String unit;
#Column(name = "stock_quantity")
int stock_quantity;
#Column(name = "reorder_level")
int reorder_level;
#Column(name = "unit_price")
int unit_price;
#Column(name = "tax_percentage")
float tax_percentage;
#OneToMany(mappedBy = "item", cascade = CascadeType.ALL,
fetch=FetchType.LAZY)
private List<Orderline> orderLines;
public Item() {
super();
}
public List<Orderline> getOrderLines() {
return orderLines;
}
public void setOrderLines(List<Orderline> orderLines) {
this.orderLines = orderLines;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getUnit() {
return unit;
}
public void setUnit(String unit) {
this.unit = unit;
}
public int getStock_quantity() {
return stock_quantity;
}
public void setStock_quantity(int stock_quantity) {
this.stock_quantity = stock_quantity;
}
public int getReorder_level() {
return reorder_level;
}
public void setReorder_level(int reorder_level) {
this.reorder_level = reorder_level;
}
public int getUnit_price() {
return unit_price;
}
public void setUnit_price(int unit_price) {
this.unit_price = unit_price;
}
public float getTax_percentage() {
return tax_percentage;
}
public void setTax_percentage(float tax_percentage) {
this.tax_percentage = tax_percentage;
}
}
#Entity
#Table(name = "OrderLine")
public class Orderline {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
int id;
#ManyToOne
#JoinColumn(name = "itemId")
private Item item;
#ManyToOne
#JoinColumn(name = "orderId")
private Orders orders;
#Column(name = "unit_cost")
float unit_cost;
#Column(name = "unit")
int unit;
#Column(name = "tax_percentage")
float tax_percentage;
#Column(name = "quantity")
int quantity;
#Column(name = "amount")
int amount;
#Column(name = "tax_amount")
float tax_amount;
#Column(name = "line_total")
int line_total;
public Orderline() {
super();
}
public Item getItem() {
return item;
}
public void setItem(Item item) {
this.item = item;
}
public Orders getOrders() {
return orders;
}
public void setOrders(Orders orders) {
this.orders = orders;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public float getUnit_cost() {
return unit_cost;
}
public void setUnit_cost(float unit_cost) {
this.unit_cost = unit_cost;
}
public int getUnit() {
return unit;
}
public void setUnit(int unit) {
this.unit = unit;
}
public float getTax_percentage() {
return tax_percentage;
}
public void setTax_percentage(float tax_percentage) {
this.tax_percentage = tax_percentage;
}
public int getQuantity() {
return quantity;
}
public void setQuantity(int quantity) {
this.quantity = quantity;
}
public int getAmount() {
return amount;
}
public void setAmount(int amount) {
this.amount = amount;
}
public float getTax_amount() {
return tax_amount;
}
public void setTax_amount(float tax_amount) {
this.tax_amount = tax_amount;
}
public int getLine_total() {
return line_total;
}
public void setLine_total(int line_total) {
this.line_total = line_total;
}
#Entity
#Table(name = "orders")
public class Orders {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
int id;
#ManyToOne
#JoinColumn(name = "customerId")
private Customer customer;
#Column(name = "order_date")
String order_date;
#Column(name = "delivery_address")
String delivery_address;
#Column(name = "total")
long total;
#OneToMany(mappedBy = "orders", cascade = CascadeType.ALL,
fetch=FetchType.LAZY)
private List<Orderline> orderlines;
#OneToOne(mappedBy = "order")
private Cash_payment cash_payment;
#OneToOne(mappedBy = "order")
private Card_payment card_payment;
#OneToOne(mappedBy = "order")
private Cheque_payment cheque_payment;
public Orders() {
super();
}
public Cash_payment getCash_payment() {
return cash_payment;
}
public void setCash_payment(Cash_payment cash_payment) {
this.cash_payment = cash_payment;
}
public Card_payment getCard_payment() {
return card_payment;
}
public void setCard_payment(Card_payment card_payment) {
this.card_payment = card_payment;
}
public Cheque_payment getCheque_payment() {
return cheque_payment;
}
public void setCheque_payment(Cheque_payment cheque_payment) {
this.cheque_payment = cheque_payment;
}
public List<Orderline> getOrderlines() {
return orderlines;
}
public void setOrderlines(List<Orderline> orderlines) {
this.orderlines = orderlines;
}
public Customer getCustomer() {
return customer;
}
public void setCustomer(Customer customer) {
this.customer = customer;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getOrder_date() {
return order_date;
}
public void setOrder_date(String order_date) {
this.order_date = order_date;
}
public String getDelivery_address() {
return delivery_address;
}
public void setDelivery_address(String delivery_address) {
this.delivery_address = delivery_address;
}
public long getTotal() {
return total;
}
public void setTotal(long total) {
this.total = total;
}
}
public class JPAExample {
private static EntityManager entityManager = EntityManagerUtil.getEntityManager();
public static void main(String[] args) {
JPAExample example = new JPAExample();
entityManager.getTransaction().begin();
Orders order = new Orders();
order.setOrder_date("2019/05/05");
order.setTotal(1000);
order.setDelivery_address("kolkata");
Item item = new Item();
item.setName("cream");
item.setReorder_level(10);
item.setUnit_price(10);
item.setUnit("kg");
item.setTax_percentage((float) 12.5);
item.setStock_quantity(20);
item.setReorder_level(5);
Orderline orderline = new Orderline();
orderline.setAmount(1);
orderline.setItem(item);
orderline.setLine_total(200);
orderline.setQuantity(1);
List<Orderline> orderlns = new ArrayList<>();
orderlns.add(orderline);
item.setOrderLines(orderlns);
Customer customer = new Customer();
customer.setId(1234);
customer.setName("Tanusha");
customer.setMobile_no(Long.valueOf("9609"));
customer.setAddress("u-86, garia");
orderline.setOrders(order);
List<Orderline> orderLinesList = new ArrayList<>();
orderLinesList.add(orderline);
order.setOrderlines(orderLinesList);
order.setCustomer(customer);
List<Orders> orderList = new ArrayList<>();
orderList.add(order);
customer.setOrders(orderList);
Card_payment cp = new Card_payment();
cp.setAmount(200);
cp.setCard_expiry_date("2019/05/05");
cp.setCard_type("visa");
cp.setIssuing_bank("SBI");
cp.setOrder(order);
order.setCard_payment(cp);
entityManager.merge(order);
try {
entityManager.getTransaction().commit();
} catch (Exception e) {
entityManager.getTransaction().rollback();
}
}
}

How to implement multiple primary keys in ORMLite

In my database there are many tables with double primary keys and even triples. Would I have a great request how to map such a table in ormlite in Java? For example: I have an Order and Product table, and a third table Order_Product, who join erlier mentioned two tables. In third table i have 2 master keys: order_id and product_id, and a normal field: quantity. I would be very grateful for explaining this problem (some examples). P.S. Sorry for my english.
I have read that i should use an attribute like uniqueCombo, useGetSet, but I do not know how to do it. And i don't know if i could use foreign annotation for these primary fields.
``` def class Order:
#DatabaseTable(tableName = "Orders")
public class Order{
public Order(){}
#DatabaseField(generatedId = true)
private int id;
#DatabaseField(columnName = "Date", canBeNull = false)
private Date date;
public int getId() { return id; }
public void setId(int id) { this.id = id; }
public Date getDate() { return date; }
public void setDate(Date date) { this.date = date; }
}
#DatabaseTable(tableName = "Products")
public class Product{
public Product(){}
#DatabaseField(generatedId = true)
private int id;
#DatabaseField(columnName = "Name", canBeNull = false)
private String name;
public int getId() { return id; }
public void setId(int id) { this.id = id; }
public String getName() { return name; }
public void setName(String name) { this.name = name; }
}
#DatabaseTable(tableName = "Order_Products")
public class Order_Product{
public Order_Product(){}
#DatabaseField(id = true, uniqueCombo=true)
private int order_id;
#DatabaseField(id = true, uniqueCombo=true)
private int product_id;
#DatabaseField(columnName = "Quantity", canBeNull = false)
private int quantity;
public int getOrder_id() { return order_id; }
public void setOrder_id(int order_id) { this.order_id = order_id; }
public int getProduct_id() { return product_id; }
public void setProduct_id(int product_id) { this.product_id = product_id; }
public int getQuantity() { return quantity; }
public void setQuantity(int quantity) { this.quantity = quantity; }
}

How to write hibernate insert query if entity name is saved in a variable

In my application I came to a situation where i need to save some data to an entity but the entity name is unknown, and is saved in a variable and entity field and its value are in a list.So i need to pick the entity name from variable and its field and data from list.
Variable is xEntity.
public void saveData(String xEntity,List<Attribute> attributeList) {
// hibernate insert query
}
Some of the entity class are shown below which may come as the xEntity,and attributeList in function saveData().
#Entity
#Table(name = "person")
public class Person implements Serializable {
#Id
#GeneratedValue
#Column(name = "id")
private Integer id;
#Column(name = "emp_id")
private String empId;
#Column(name = "name")
private String name;
#Column(name="dob")
private Date dob;
#Column(name="active")
private Boolean active;
#Column(name="created_on")
private Timestamp createdOn;
public Person() {
}
public Person(Integer id, String empId, String name, Date dob, Boolean active, Timestamp createdOn) {
this.id = id;
this.empId = empId;
this.name = name;
this.dob = dob;
this.active = active;
this.createdOn = createdOn;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getEmpId() {
return empId;
}
public void setEmpId(String empId) {
this.empId = empId;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Date getDob() {
return dob;
}
public void setDob(Date dob) {
this.dob = dob;
}
public Boolean getActive() {
return active;
}
public void setActive(Boolean active) {
this.active = active;
}
public Timestamp getCreatedOn() {
return createdOn;
}
public void setCreatedOn(Timestamp createdOn) {
this.createdOn = createdOn;
}
}
#Entity
#Table(name = "person_address")
public class PersonAddress implements Serializable {
#Id
#GeneratedValue
#Column(name = "id")
private Integer id;
#Column(name = "emp_id")
private String empId;
#Column(name = "house_name")
private String houseName;
#Column(name="post_office")
private String postOffice;
#Column(name="district")
private String district;
#Column(name="state")
private String state;
#Column(name="active")
private Boolean active;
#Column(name="created_on")
private Timestamp createdOn;
public PersonAddress() {
}
public PersonAddress(Integer id, String empId, String houseName, String postOffice, String district, String state, Boolean active, Timestamp createdOn) {
this.id = id;
this.empId = empId;
this.houseName = houseName;
this.postOffice = postOffice;
this.district = district;
this.state = state;
this.active = active;
this.createdOn = createdOn;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getEmpId() {
return empId;
}
public void setEmpId(String empId) {
this.empId = empId;
}
public String getHouseName() {
return houseName;
}
public void setHouseName(String houseName) {
this.houseName = houseName;
}
public String getPostOffice() {
return postOffice;
}
public void setPostOffice(String postOffice) {
this.postOffice = postOffice;
}
public String getDistrict() {
return district;
}
public void setDistrict(String district) {
this.district = district;
}
public void setState(String state) {
this.state = state;
}
public Boolean getActive() {
return active;
}
public void setActive(Boolean active) {
this.active = active;
}
public Timestamp getCreatedOn() {
return createdOn;
}
public void setCreatedOn(Timestamp createdOn) {
this.createdOn = createdOn;
}
}
#Entity
#Table(name = "person_qualification")
public class PersonQualification implements Serializable {
#Id
#GeneratedValue
#Column(name = "id")
private Integer id;
#Column(name = "emp_id")
private String empId;
#Column(name = "degree")
private String degree;
#Column(name="grade")
private String grade;
#Column(name="active")
private Boolean active;
#Column(name="created_on")
private Timestamp createdOn;
public PersonQualification() {
}
public PersonQualification(Integer id, String empId, String degree, String grade, Boolean active, Timestamp createdOn) {
this.id = id;
this.empId = empId;
this.degree = degree;
this.grade = grade;
this.active = active;
this.createdOn = createdOn;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getEmpId() {
return empId;
}
public void setEmpId(String empId) {
this.empId = empId;
}
public String getDegree() {
return degree;
}
public void setDegree(String degree) {
this.degree = degree;
}
public String getGrade() {
return grade;
}
public void setGrade(String grade) {
this.grade = grade;
}
public Boolean getActive() {
return active;
}
public void setActive(Boolean active) {
this.active = active;
}
public Timestamp getCreatedOn() {
return createdOn;
}
public void setCreatedOn(Timestamp createdOn) {
this.createdOn = createdOn;
}
}
Below are some of the values that may come to attributeList each time.
attributeList = [{"fieldName":"empId","value":"EMP_123"},{"fieldName":"name","value":"Basil"},{"fieldName":"dob","value":"26-11-90"}]
attributeList = [{"fieldName":"empId","value":"EMP_123"},{"fieldName":"houseName","value":"Ellikkal"},{"fieldName":"postOffice","value":"Chengara"},{"fieldName":"district","value":"Alappy"},{"fieldName":"state","value":"Kerala"}]
attributeList = [{"fieldName":"empId","value":"EMP_123"},{"fieldName":"degree","value":"B.Tech"},{"fieldName":"grade","value":"First class"}]
Date value come as string date which should be formatted to type Date.Below is the Attribute class.
public class Attribute implements Serializable {
private String fieldName;
private String value;
public Attribute() {
super();
// TODO Auto-generated constructor stub
}
public Attribute(String fieldName, String value) {
this.fieldName = fieldName;
this.value = value;
}
public String getFieldName() {
return fieldName;
}
public void setFieldName(String fieldName) {
this.fieldName = fieldName;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
}
Now can i use hibernate query to save data to each entity?If anyone know please help me.

Though I don't know why you want to do this but if you have no other choice then you have to use reflection here.
First create instance using your class name. It should be full class name. Also your classes should have default constructor.
Class<?> clazz = Class.forName(className);
Constructor<?> ctor = clazz.getConstructor();
Object object = ctor.newInstance();
Now use reflection to set the values of fields. Lets assume your field name is stored in fieldName and value is stored in fieldValue
declaredField = object.getClass().getDeclaredField(fieldName);
declaredField.setAccessible(true);
declaredField.set(object, fieldValue);
For the cases where you need to convert the type from String to Date etc. You have to get field type and convert accordingly. Field type can be found out by:
declaredField.getFieldType();
Now save this object using hibernate.
sessionFactory.getCurrentSession().save(object);

I'm afraid HQL doesn't support inserting per query but you can use reflection to build your entities or create a native query.

How to make a join on Java with criteria builder

I have a database in which I need to make a Join from Java with a CriteriaBuilder.
I have this code so far:
CriteriaBuilder cb = entman.getCriteriaBuilder();
CriteriaQuery<Company> query = cb.createQuery(Company.class);
Root<Employee> teacher = query.from(Employee.class);
Join<Employee, Company> employees = teacher.join("id");
query.select(employees).where(cb.equal(teacher.get("name"), ""));
List<Company> results = entman.createQuery(query).getResultList();
return results;
After I run this code ( with springboot) i get this error: Cannot join to attribute of basic type
Does anyone know what should I do to make it work ?
PS: I will provide any other information if needed.
Thanks in advance.
company database
employee database
L.E.:
Employee:
#Entity
public class Employee {
#Id
#GeneratedValue
private Long id;
#Column(nullable = false)
#Size(min = 1)
private String name;
#Column(nullable = false)
#Temporal(TemporalType.DATE)
private Date hire_date;
#ManyToOne
//#JoinColumn(name = "id")
private Company company;
public Employee() {}
public Employee(Long id, String name, Date date, Company company) {
setId(id);
setName(name);
setHire_date(date);
setCompany(company);
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Date getHire_date() {
return hire_date;
}
public void setHire_date(Date hire_date) {
this.hire_date = hire_date;
}
public Company getCompany() {
return company;
}
public void setCompany(Company company) {
this.company = company;
}
}
Company:
#Entity
public class Company {
#Id
#GeneratedValue
private Long id;
#Column(nullable = false)
#Size(min = 1)
private String name;
#OneToMany(mappedBy="company", cascade = CascadeType.ALL, fetch=FetchType.EAGER, orphanRemoval=true)
private Collection<Employee> employees;
public Company() {}
public Company(Long id, String name) {
setId(id);
setName(name);
}
public Company(Long id, String name, Collection<Employee> employees) {
setId(id);
setName(name);
setEmployees(employees);
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Collection<Employee> getEmployees()
{
return employees;
}
public void setEmployees(Collection<Employee> employees) {
this.employees = employees;
}
#Override
public String toString() {
return "Company [id=" + id + ", name=" + name + ", employees=" + employees.toString() + "]";
}
}

You need to have a Teacher element, not a reference to id because you cannot join a #Column field...
Change id mapping from #Column:
#Column(name = "id")
private Integer id;
with a #ManyToOne (or the needed one) association:
#ManyToOne
#JoinColumn(name = "id")
private Teacher teacher;
After this your join will work as expected.

add a new entity -One-To-Many relation

I define the following entities :BaseEntity , magasin and article :
#Entity(name = "magasin")
#Table(name = "magasin")
public class Magasin extends BaseEntity {
private static final long serialVersionUID = 1L;
#Basic
#Size(min=5, max=100, message="The name must be between {min} and {max} characters")
private String name;
#OneToMany(cascade=CascadeType.ALL, mappedBy="magasin")
#Valid
private Set<Article> article;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Set<Article> getArticle() {
return article;
}
public void setArticle(Set<Article> article) {
this.article = article;
}
}
#Entity(name="article")
#Table(name="article")
public class Article extends BaseEntity {
private static final long serialVersionUID = 1L;
#ManyToOne
private Magasin magasin;
#Basic
#Size(min=5, max=100, message="The name must be between {min} and {max} characters")
private String name;
#Basic
private float price;
public Magasin getMagasin() {
return magasin;
}
public void setMagasin(Magasin magasin) {
this.magasin = magasin;
}
public String getName() {
return name;
}
public void setName(String nom) {
this.name = nom;
}
public float getPrice() {
return price;
}
public void setPrice(float price) {
this.price = price;
}
}
#MappedSuperclass
public class BaseEntity {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private Integer id;
public void setId(Integer id) {
this.id = id;
}
public Integer getId() {
return id;
}
public boolean isNew() {
return (this.id == null);
}
I try to add a new entity bit it didn't work .No new entity will be inserted .there is no error .How can I modify it in order to add a new entity for article ?
Function from GenericDao
public T add(T entity) {
System.out.println("start");
getHibernateTemplate().save(entity);
System.out.println("end");
return entity;
}
Flex Main
private function submitData(event:Event):void {
var article_ajout=new Article();
article_ajout.name=pop1.art_name.text;
article_ajout.price=parseFloat(pop1.art_prix.text);
article_ajout.magasin=Magasin(iMagasin.selectedItem);
Alert.show("test");
articleService.add(article_ajout);
removeMe(event);
}