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Unable to retrieve data from MySQL using Spring boot JPA

I am getting a java.lang.NullPointerException error at the line where the program begins to retrieve data from the database, specifically starting with the code recordDB.setAccountName(billing.getAccountId().getAccountName());. The entity tables are joined together and at first I thought that it can't retrieve data from other other tables but I tried to run with just recordDB.setAmount(billing.getAmount()); Can someone explain what I missed or is there something wrong with the logic?
Component
#Component
public class FileProcessor {
#Autowired
private BillingRepository billingRepository;
public FileProcessor() {
}
public List<Record> retrieveRecordfromDB(List<Request> requests) throws BarsException{
List<Record> records = new ArrayList<>();
if (!requests.isEmpty()) {
for (Request request : requests) {
Billing billing = billingRepository
.findByBillingCycleAndStartDateAndEndDate(
request.getBillingCycle()
, request.getStartDate()
, request.getEndDate());
if (billing == null) {
throw new BarsException(BarsException.NO_RECORDS_TO_WRITE);
}
Record recordDB = new Record();
recordDB.setBillingCycle(request.getBillingCycle());
recordDB.setStartDate(request.getStartDate());
recordDB.setEndDate(request.getStartDate());
recordDB.setAccountName(billing.getAccountId().getAccountName());
recordDB.setFirstName(billing.getAccountId().getCustomerId().getFirstName());
recordDB.setLastName(billing.getAccountId().getCustomerId().getLastName());
recordDB.setAmount(billing.getAmount());
records.add(recordDB);
}
}
return records;
}
}
Account Entity
#Entity
public class Account {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "account_id")
private int accountId;
private String accountName;
private LocalDateTime dateCreated;
private String isActive;
private String lastEdited;
public Account() {
}
public int getAccountId() {
return accountId;
}
public void setAccountId(int accountId) {
this.accountId = accountId;
}
public String getAccountName() {
return accountName;
}
public void setAccountName(String accountName) {
this.accountName = accountName;
}
public LocalDateTime getDateCreated() {
return dateCreated;
}
public void setDateCreated(LocalDateTime dateCreated) {
this.dateCreated = dateCreated;
}
public String getIsActive() {
return isActive;
}
public void setIsActive(String isActive) {
this.isActive = isActive;
}
public String getLastEdited() {
return lastEdited;
}
public void setLastEdited(String lastEdited) {
this.lastEdited = lastEdited;
}
public Customer getCustomerId() {
return customerId;
}
public void setCustomerId(Customer customerId) {
this.customerId = customerId;
}
public Set<Billing> getBilling() {
return billing;
}
public void setBilling(Set<Billing> billing) {
this.billing = billing;
}
#ManyToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "customer_id")
private Customer customerId;
#OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
#JoinColumn(name = "account_id")
private Set<Billing> billing;
}
Billing Entity
#Entity
public class Billing {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "billing_id")
private int billingId;
//private int billingId;
private int billingCycle;
private String billingMonth;
private Double amount;
private LocalDate startDate;
private LocalDate endDate;
private String lastEdited;
//private Account accountId;
public Billing() {
}
public int getBillingId() {
return billingId;
}
public void setBillingId(int billingId) {
this.billingId = billingId;
}
public int getBillingCycle() {
return billingCycle;
}
public void setBillingCycle(int billingCycle) {
this.billingCycle = billingCycle;
}
public String getBillingMonth() {
return billingMonth;
}
public void setBillingMonth(String billingMonth) {
this.billingMonth = billingMonth;
}
public Double getAmount() {
return amount;
}
public void setAmount(Double amount) {
this.amount = amount;
}
public LocalDate getStartDate() {
return startDate;
}
public void setStartDate(LocalDate startDate) {
this.startDate = startDate;
}
public LocalDate getEndDate() {
return endDate;
}
public void setEndDate(LocalDate endDate) {
this.endDate = endDate;
}
public String getLastEdited() {
return lastEdited;
}
public void setLastEdited(String lastEdited) {
this.lastEdited = lastEdited;
}
public Account getAccountId() {
return accountId;
}
public void setAccountId(Account accountId) {
this.accountId = accountId;
}
#ManyToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "account_id")
private Account accountId;
}
Customer Entity
#Entity
public class Customer {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "customer_id")
private int customerId;
private String firstName;
private String lastName;
private String address;
private String status;
private LocalDateTime dateCreated;
private String lastEdited;
public Customer() {
}
public int getCustomerId() {
return customerId;
}
public void setCustomerId(int customerId) {
this.customerId = customerId;
}
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 String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public LocalDateTime getDateCreated() {
return dateCreated;
}
public void setDateCreated(LocalDateTime dateCreated) {
this.dateCreated = dateCreated;
}
public String getLastEdited() {
return lastEdited;
}
public void setLastEdited(String lastEdited) {
this.lastEdited = lastEdited;
}
#OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
#JoinColumn(name = "customer_id")
private Set<Account> account;
}
Repository
#Repository
public interface BillingRepository extends JpaRepository<Billing, Integer> {
public Billing findByBillingCycleAndStartDateAndEndDate (int billingCycle, LocalDate startDate, LocalDate endDate);
}

Your naming is unintuitive, which hinders people unfamiliar with the code:
recordDB implies that it is the Database for records. Instead, it is a record that is to be saved in the DB. Naming it "RecordToSave" or similar is much better, since it gets the intention across.
getAccountId() implies that the id of an account is returned (an int or long) NOT that the account itself is returned. You should rename it to getAccount()
About the issue:
What you are using as a bidirectional ManyToOne <-> OneToMany relationship.
One side should be the owning side of the relationship. Here the #JoinColumn should be stated. The receiving end should have a MappedBy Property.
See this guide for more information: https://thorben-janssen.com/hibernate-tips-map-bidirectional-many-one-association/
It should solve the issue, since only the data retrieval for connected tables does not seem to work, hence fixing the references should fix the issue.
Your billing.getAmount() does refer to data written in the billing object/table, and is not from another table like billing.getAccountId().getAccountName() which gets data from the account table connected to the billings table.
Last, but not least:
Think about your cascading strategy. The way it currently works, deleting a billing will delete the account of that billing, which deletes all references made there and so on since you currently use Cascade.All for ALL entries. This is bad.
Here is a guide for cascading: https://howtodoinjava.com/hibernate/hibernate-jpa-cascade-types/

Are you sure the field names in the Billing class exactly match the database column names? I see you set the column name to "billing_id" explicitly for the id field, but not for any other fields. My guess is that the fields in that class are all null since there are no corresponding database columns (debug to confirm).

Getting an error about not having an Identifier even when I have one

This is my UserRole class. Here, the id_roles, id_users and updated_by are supposed to be foreign keys (id_roles coming from the Role table and the other two coming from the User table, I'll put the code for each one of the tables down below)
package offgrid.models;
import io.quarkus.hibernate.reactive.panache.PanacheEntityBase;
import javax.persistence.*;
import java.time.LocalDateTime;
#Entity
#Access(AccessType.PROPERTY)
#Table(name = "user_roles")
public class UserRole extends PanacheEntityBase {
#EmbeddedId
private UserRolePK UserRolePK;
#OneToOne
#JoinColumn(name = "id_roles", referencedColumnName = "id")
private Role roleId;
#OneToOne
#JoinColumn(name = "id_users", referencedColumnName = "id")
private User userId;
#Column(name = "created_at")
private LocalDateTime createdAt;
#Column(name = "updated_at")
private LocalDateTime updatedAt;
#ManyToOne
#JoinColumn(name = "update_by", referencedColumnName = "name")
private User updatedBy;
public offgrid.models.UserRolePK getUserRolePK() {
return UserRolePK;
}
public void setUserRolePK(offgrid.models.UserRolePK userRolePK) {
UserRolePK = userRolePK;
}
public Role getRoleId() {
return roleId;
}
public void setRoleId(Role roleId) {
this.roleId = roleId;
}
public User getUserId() {
return userId;
}
public void setUserId(User userId) {
this.userId = userId;
}
public LocalDateTime getCreatedAt() {
return createdAt;
}
public void setCreatedAt(LocalDateTime createdAt) {
this.createdAt = createdAt;
}
public LocalDateTime getUpdatedAt() {
return updatedAt;
}
public void setUpdatedAt(LocalDateTime updatedAt) {
this.updatedAt = updatedAt;
}
public User getUpdatedBy() {
return updatedBy;
}
public void setUpdatedBy(User updatedBy) {
this.updatedBy = updatedBy;
}
}
And this is my UserRolePK
package offgrid.models;
import javax.persistence.Column;
import javax.persistence.Embeddable;
import java.io.Serializable;
import java.util.Objects;
#Embeddable
public class UserRolePK implements Serializable {
#Column(name = "user_id")
private Long userId;
#Column(name = "role_id")
private Long roleId;
public Long getUserId() {
return userId;
}
public void setUserId(Long userId) {
this.userId = userId;
}
public Long getRoleId() {
return roleId;
}
public void setRoleId(Long roleId) {
this.roleId = roleId;
}
#Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
UserRolePK that = (UserRolePK) o;
return userId.equals(that.userId) && roleId.equals(that.roleId);
}
#Override
public int hashCode() {
return Objects.hash(userId, roleId);
}
}
Here is my User class
package offgrid.models;
import io.quarkus.hibernate.reactive.panache.PanacheEntityBase;
import org.hibernate.annotations.GenericGenerator;
import org.hibernate.annotations.Type;
import javax.persistence.*;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.util.UUID;
#Entity
#Table(name="users")
public class User extends PanacheEntityBase {
#Id
#Column(name = "id")
#GeneratedValue(generator = "UUID")
#GenericGenerator(
name = "UUID",
strategy = "org.hibernate.id.UUIDGenerator"
)
#Type(type = "pg-uuid")
private UUID id;
#Column(name = "user")
private String username;
#Column(name = "name")
private String name;
#Column(name = "date_of_birth")
private LocalDate dateOfBirth;
#Column(name = "photo")
private String photo;
#Column(name = "tax_id")
private String taxId;
#Column(name = "status")
private String status;
#Column(name = "created_at")
private LocalDateTime createdAt;
#Column(name = "updated_at")
private LocalDateTime updateAt;
#ManyToOne
#JoinColumn(name = "updated_by")
private User user;
public UUID getId() {
return id;
}
public void setId(UUID id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public LocalDate getDateOfBirth() {
return dateOfBirth;
}
public void setDateOfBirth(LocalDate dateOfBirth) {
this.dateOfBirth = dateOfBirth;
}
public String getPhoto() {
return photo;
}
public void setPhoto(String photo) {
this.photo = photo;
}
public String getTaxId() {
return taxId;
}
public void setTaxId(String taxId) {
this.taxId = taxId;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public LocalDateTime getCreatedAt() {
return createdAt;
}
public void setCreatedAt(LocalDateTime createdAt) {
this.createdAt = createdAt;
}
public LocalDateTime getUpdateAt() {
return updateAt;
}
public void setUpdateAt(LocalDateTime updateAt) {
this.updateAt = updateAt;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
}
And the Role class
package offgrid.models;
import io.quarkus.hibernate.reactive.panache.PanacheEntityBase;
import org.hibernate.annotations.GenericGenerator;
import org.hibernate.annotations.Type;
import javax.persistence.*;
import java.time.LocalDateTime;
import java.util.UUID;
#Entity
#Table(name = "roles")
public class Role extends PanacheEntityBase {
#Id
#Column(name = "id")
#GeneratedValue(generator = "UUID")
#GenericGenerator(
name = "UUID",
strategy = "org.hibernate.id.UUIDGenerator"
)
#Type(type = "pg-uuid")
private UUID id;
#Column(name = "name")
private String name;
#Column(name = "created_at")
private LocalDateTime createdAt;
#Column(name = "updated_at")
private LocalDateTime updatedAt;
#ManyToOne
#JoinColumn(name = "updated_by")
private User updatedBy;
public UUID getId() {
return id;
}
public void setId(UUID id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public LocalDateTime getCreatedAt() {
return createdAt;
}
public void setCreatedAt(LocalDateTime createdAt) {
this.createdAt = createdAt;
}
public LocalDateTime getUpdatedAt() {
return updatedAt;
}
public void setUpdatedAt(LocalDateTime updatedAt) {
this.updatedAt = updatedAt;
}
public User getUpdatedBy() {
return updatedBy;
}
public void setUpdatedBy(User updatedBy) {
this.updatedBy = updatedBy;
}
}
I'm getting this error when I try to run my code:
Caused by: org.hibernate.AnnotationException: No identifier specified for entity: offgrid.models.UserRole
But as I detailed above, there I put an EmbeddedId annotation referencing my UserRolePK class.. Am I missing something?

It's because of:
#Access(AccessType.PROPERTY)
But you used annotations on fields.
Change it to:
#Access(AccessType.FIELD)
or remove it, as JPA know it is FIELD base on where you placed the annotations.

Deserialize Exception in spring hibernate with OneToOne Mapping

I am using Spring boot 2.1.2 with hibernate , and i have simple two model classes like user and user account, and these 2 models are connected with oneToOne mapping. When we call user, i need to get user account also. I just mapped user account model to user model with oneToOne mapping. But when i call user am facing one Deserialize Exception.
User model
import java.io.Serializable;
import java.util.Calendar;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToOne;
import javax.persistence.Table;
#Entity
#Table(name = "tbl_user")
public class User implements Serializable{
/**
*
*/
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "id")
private Integer id;
#OneToOne(fetch = FetchType.EAGER)
#JoinColumn(name = "user_account_id")
UserAccount userAccount;
#Column(name = "first_name",nullable = false)
private String firstName;
#Column(name = "active",nullable = false)
private Integer active;
#Column(name = "created_date",nullable = false)
private Calendar createdDate;
#Column(name = "created_by",nullable = false)
private Integer created_by;
#Column(name = "updated_date")
private Calendar updatedDate;
#Column(name = "updated_by")
private Integer updated_by;
public User() {
super();
// TODO Auto-generated constructor stub
}
public User(Integer id, UserAccount userAccount, String firstName, Integer active, Calendar createdDate,
Integer created_by, Calendar updatedDate, Integer updated_by) {
super();
this.id = id;
this.userAccount = userAccount;
this.firstName = firstName;
this.active = active;
this.createdDate = createdDate;
this.created_by = created_by;
this.updatedDate = updatedDate;
this.updated_by = updated_by;
}
public Integer getId() {
return id;
}
public UserAccount getUserAccount() {
return userAccount;
}
public void setUserAccount(UserAccount userAccount) {
this.userAccount = userAccount;
}
public void setId(Integer id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public Integer getActive() {
return active;
}
public void setActive(Integer active) {
this.active = active;
}
public Calendar getCreatedDate() {
return createdDate;
}
public void setCreatedDate(Calendar createdDate) {
this.createdDate = createdDate;
}
public Integer getCreated_by() {
return created_by;
}
public void setCreated_by(Integer created_by) {
this.created_by = created_by;
}
public Calendar getUpdatedDate() {
return updatedDate;
}
public void setUpdatedDate(Calendar updatedDate) {
this.updatedDate = updatedDate;
}
public Integer getUpdated_by() {
return updated_by;
}
public void setUpdated_by(Integer updated_by) {
this.updated_by = updated_by;
}
}
UserAccount Model
import java.io.Serializable;
import java.util.Calendar;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name = "tbl_user_account")
public class UserAccount implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "id")
private Integer id;
#Column(name = "usere_name",nullable = false)
UserAccount usereName;
#Column(name = "password", nullable = false)
private String password;
#Column(name = "active",nullable = false)
private Integer active;
#Column(name = "created_date",nullable = false)
private Calendar createdDate;
#Column(name = "created_by",nullable = false)
private Integer created_by;
#Column(name = "updated_date")
private Calendar updatedDate;
#Column(name = "updated_by")
private Integer updated_by;
public UserAccount(Integer id, UserAccount usereName, String password,Integer active,
Calendar createdDate, Integer created_by, Calendar updatedDate, Integer updated_by) {
super();
this.id = id;
this.usereName = usereName;
this.password = password;
this.active = active;
this.createdDate = createdDate;
this.created_by = created_by;
this.updatedDate = updatedDate;
this.updated_by = updated_by;
}
public UserAccount() {
super();
// TODO Auto-generated constructor stub
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public UserAccount getUsereName() {
return usereName;
}
public void setUsereName(UserAccount usereName) {
this.usereName = usereName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Integer getActive() {
return active;
}
public void setActive(Integer active) {
this.active = active;
}
public Calendar getCreatedDate() {
return createdDate;
}
public void setCreatedDate(Calendar createdDate) {
this.createdDate = createdDate;
}
public Integer getCreated_by() {
return created_by;
}
public void setCreated_by(Integer created_by) {
this.created_by = created_by;
}
public Calendar getUpdatedDate() {
return updatedDate;
}
public void setUpdatedDate(Calendar updatedDate) {
this.updatedDate = updatedDate;
}
public Integer getUpdated_by() {
return updated_by;
}
public void setUpdated_by(Integer updated_by) {
this.updated_by = updated_by;
}
}
Property file
# Application running port
server.port=8000
# Application running port
server.servlet.contextPath=/app
# Log files
logging.level.org.springframework.web: DEBUG
logging.level.org.hibernate: ERROR
#DB config
spring.datasource.url=jdbc:mysql://localhost:3306/db_name
spring.datasource.username=root
spring.datasource.password=root
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect

The problem seems to be in UserAccount class, where you defined usereName field as UserAccount type.
I think it should be a String.

Foreign key constraint is not created in one-to-one relationship in jpa

I have one-to-one relationship with the following configuration:
#Entity
#Table(name = "org")
#SequenceGenerator(name = "default_gen", sequenceName = "haj_rasoul", allocationSize = 1)
public class Organization extends BaseEntity<Long> {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
and this class:
#Entity
#Table(name = "product")
#GenericGenerator(name = "default_gen", strategy = "foreign", parameters = #Parameter(name = "property", value = "reza"))
public class Product extends BaseEntity<Long> {
#Column(name = "DD")
private String description;
#Column(name = "PP")
private BigDecimal price;
#Column(name = "MM")
private String imageUrl;
#OneToOne
#PrimaryKeyJoinColumn(referencedColumnName = "id")
private Organization reza;
public Organization getReza() {
return reza;
}
public void setReza(Organization reza) {
this.reza = reza;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public BigDecimal getPrice() {
return price;
}
public void setPrice(BigDecimal price) {
this.price = price;
}
public String getImageUrl() {
return imageUrl;
}
public void setImageUrl(String imageUrl) {
this.imageUrl = imageUrl;
}
}
and the BaseEntity:
#MappedSuperclass
public abstract class BaseEntity<T> implements Serializable {
private static final long serialVersionUID = 4295229462159851306L;
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "default_gen")
private T id;
#Column(name = "updatedby")
private Date updatedDate;
public Date getUpdatedDate() {
return updatedDate;
}
public void setUpdatedDate(Date updatedDate) {
this.updatedDate = updatedDate;
}
public T getId() {
return id;
}
public void setId(T id) {
this.id = id;
}
}
When the application is started with the update mode for creation the models,
they are created successfully but foreign key Organization does not exist in the Product, another hand the record of Organization can be deleted in the event that it is in the Product as foreign key.
Where is wrong?
How do i fix this problem?

How to join Maps

How to join newMap detals in custMap.
Map<String, Customer> custMap= new HashMap<String,Customer>();
Map<String, DoCustomer> newMap= new HashMap<String,DoCustomer>();
for (Map.Entry<String, DoCustomer> cust: newMap.entrySet()) {
custMap.put(cust.getKey(),cust.getValue());
}
public class DoCustomer {
private Long id;
private String custName;
private String description;
private String status;
private List<DoCustomerBranch> doCustomerBranch=new ArrayList<DoCustomerBranch>
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getCustName() {
return custName;
}
public void setCustName(String custName) {
this.custName = custName;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
getter/setters of doCustomerBranch
}
#Entity
#Table(name = "CUSTOMER")
public class Customer implements Serializable{
private static final long serialVersionUID = 1L;
private Long id;
private String custName;
private String description;
private String createdBy;
private Date createdOn;
private String updatedBy;
private Date updatedOn;
private Set<CustomerBranch> customerBranch=new HashSet<CustomerBranch>
#Id
#GeneratedValue(generator = "CUSTOMER_SEQ")
#SequenceGenerator(name = "CUSTOMER_SEQ", sequenceName = "CUSTOMERN_SEQ", allocationSize = 1)
#Column(name = "ID")
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
#Column(name = "CUST_NAME",nullable=false)
public String getCustName() {
return custName;
}
public void setCustName(String custName) {
this.custName = custName;
}
#Column(name = "DESCRIPTION")
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
#Column(name = "CREATED_BY", length = 50)
public String getCreatedBy() {
return createdBy;
}
public void setCreatedBy(String createdBy) {
this.createdBy = createdBy;
}
#Temporal(TemporalType.TIMESTAMP)
#Column(name = "CREATED_ON")
public Date getCreatedOn() {
return createdOn;
}
public void setCreatedOn(Date createdOn) {
this.createdOn = createdOn;
}
#Column(name = "UPDATED_BY", length = 50)
public String getUpdatedBy() {
return updatedBy;
}
public void setUpdatedBy(String updatedBy) {
this.updatedBy = updatedBy;
}
#Temporal(TemporalType.TIMESTAMP)
#Column(name = "UPDATED_ON")
public Date getUpdatedOn() {
return updatedOn;
}
public void setUpdatedOn(Date updatedOn) {
this.updatedOn = updatedOn;
}
#OneToMany(cascade = { CascadeType.PERSIST, CascadeType.REMOVE }, fetch = FetchType.LAZY, mappedBy = "customer")
public Set<CustomerBranch> getCustomerBranch() {
return customerBranch;
}
public void setCustomerBranch(Set<CustomerBranch> customerBranch) {
this.customerBranch = customerBranch;
}
}
CustomerBranch
#Entity
#Table(name = "CUSTOMER_BRANCH")
public class CustomerBranch implements Serializable{
#Id
#GeneratedValue(generator = "CUSTOMER_BRANCH_SEQ")
#SequenceGenerator(name = "CUSTOMER_BRANCH_SEQ", sequenceName = "CUSTOMER_BRANCH_SEQ", allocationSize = 1)
#Column(name = "ID")
private Long id;
private String branchName;
private String branchAddress;
private Customer customer;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
#Column(name = "BRANCH_NAME",nullable=false)
public String getBranchName() {
return branchName;
}
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "MOBEE_CUSTOMER")
public Customer getCustomer() {
return customer;
}
public void setCustomer(Customer customer) {
this.customer = customer;
}
}

The problem with your code is that you want to put a DoCustomer in a Customer container. It only works if DoCustomer is a subclass of Customer.
Edit 1: You could use BeanUtils to convert a DoCustomer into a Customer. Here is a good tutorial.

Do you mean:
custMap.putAll(newMap)

As everyone else has pointed out, we need to know what DoCustomer is to be able to help.
But, from what you have given us, I'd suggest casting each DoCustomer to a Customer or, more correctly, making a new Customer from the fields of each DoCustomer.
Something like:
custMap.put(cust.getKey(), new Customer(cust.getValue().getId(), cust.getValue().getCustName(), and so on..));
inside your for loop.
I can see the customer class defined you have provided doesn't have a constructor, so naturally you would have to add one to it