Hibernate mapping non-entity class with List - java

I have 3 classes - Patient, AllergyList and Allergy. Both Patient and Allergy are #Entity and AllergyList simply has a variable with a list of Allergiest.
#Entity
public class Allergy {
private String id;
private String name;
public Allergy(String i, String n) {
id=i;
name=n;
}
#Id
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String n) {
this.name = n;
}
}
The Allergy class MUST have an id, and is referenced by other class in my program.
public class AllergyList {
private List<Allergy> allergies = new ArrayList<Allergy>();
public List<Allergy> getAllergies() {
return allergies;
}
public void setAllergies(List<Allergy> a) {
this.allergies = a;
}
}
I need to have this class, because I have inherited the program, and cannot change the existing codebase.
#Entity
public class Patient {
private String id;
private AllergyList allergyList = new AllergyList();
public Patient() {}
#Id
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public AllergyList getAllergyList() {
return allergyList;
}
public void setAllergyList(AllergyList allergyList) {
this.allergyList = allergyList;
}
}
And the main...
public static void main(String[] args) {
Patient patient = new Patient();
patient.setId("100001");
List<Allergy> allergies = new ArrayList<Allergy>();
allergies.add(new Allergy("1","Dust"));
allergies.add(new Allergy("3","Apple"));
allergies.add(new Allergy("4","Bee"));
patient.allergyList.setAllergies(allergies);
.
.
session.save(patient);
.
.
}
So the above three classes are what I'm given. I need to create allergy_list table that contains the following:
allergy_list
patient_id
allergy_id
I know I can create a List inside the Patient class, but the way the program is written I need to access the Allergy through the AllergyList class. How can I annotate to make this happen? Is it even possible?

Related

How to select fields in spring data?

I have entity as follow.
#Entity
#Table(name = "BankProduct")
public class Product {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String name;
#ManyToOne
private ProductUseType type;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
#ManyToOne
private ProductSerial serial;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public ProductUseType getType() {
return type;
}
public void setType(ProductUseType type) {
this.type = type;
}
public ProductSerial getSerial() {
return serial;
}
public void setSerial(ProductSerial serial) {
this.serial = serial;
}
}
My controller is :
#RestController
public class DEmoController {
#Autowired
private ProductRepository productRepository;
#GetMapping("/products")
public Returns products() {
return new Returns(ReturnStatus.SUCCESS.getStatus(), productRepository.findAll(), null);
}
}
It will load both of type and serial of product.
Can I only load type but not to load serial?
I don't want to add fetch=FetchType.LAZY to serial, because if next time I want to load serial but not to load type, it will be terrible.

Check the Projection interface
Create a interface ProductProjection
interface ProductProjection {
String getName();
String getType();
}
and add a method in you Repository
List<ProductProjection> findAllProjection()

That's the whole point of fetch=FetchType.LAZY. It'll not load any of your types/fields until you ask for them explicitly.
Take a look at this question: Link

How Hibernate to query three tables in a time?

I have three tables :
1. org,
2. product_info
3. service_info.
And, table product_info is mapping table service_info ManyToMany,
means,many products mapping many services.
While,table org is mapping table product_info OneToMany,
means,one org have many products.
When I initialize my web
I want to view the org table's column. How to do ?
Under classes are the persistent classes for three tables.
ProductService class:
`
#Entity
#Table(name="product_service")
#Cache(usage=CacheConcurrencyStrategy.READ_WRITE)
public class ProductService implements java.io.Serializable {
private static final long serialVersionUID = 1L;
private String id;
private ServiceInfo serviceInfo;//this is the service table
private String parammapping;
private ProductInfo productInfo;//this is the product table
// Constructors
/** default constructor */
public ProductService() {
}
/** minimal constructor */
public ProductService(String id) {
this.id = id;
}
// Property accessors
#Id
#Column(name="ID", unique=true, nullable=false, length=50)
public String getId() {
return this.id;
}
public void setId(String id) {
this.id = id;
}
#ManyToOne(fetch=FetchType.LAZY)
#JoinColumn(name="SERVICEID")
public ServiceInfo getServiceInfo() {
return this.serviceInfo;
}
public void setServiceInfo(ServiceInfo serviceInfo) {
this.serviceInfo = serviceInfo;
}
#Column(name="PARAMMAPPING", length=1000)
public String getParammapping() {
return parammapping;
}
public void setParammapping(String parammapping) {
this.parammapping = parammapping;
}
#ManyToOne(fetch=FetchType.LAZY)
#JoinColumn(name="PRODUCTID")
public ProductInfo getProductInfo() {
return this.productInfo;
}
public void setProductInfo(ProductInfo productInfo) {
this.productInfo = productInfo;
}
}`
baseOrg class:
#Entity
#Table(name="base_org")
#Cache(usage=CacheConcurrencyStrategy.READ_WRITE)
public class BaseOrg implements java.io.Serializable {
private static final long serialVersionUID = 1L;
private String id;
private String code;
private String name;
private List<BaseRuleEngineLog> serviceUsedLogs = new ArrayList<BaseRuleEngineLog>(0);
private List<ProductInfo> productInfos = new ArrayList<ProductInfo>(0);
private List<BaseCreditQuery> baseCreditQueries = new ArrayList<BaseCreditQuery>(0);
// Constructors
/** default constructor */
public BaseOrg() {
}
/** minimal constructor */
public BaseOrg(String id) {
this.id = id;
}
#Id
#Column(name="ID", unique=true, nullable=false, length=50)
public String getId() {
return this.id;
}
public void setId(String id) {
this.id = id;
}
#Column(name="CODE", length=50)
public String getCode() {
return this.code;
}
public void setCode(String code) {
this.code = code;
}
#Column(name="NAME", length=200)
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
#OneToMany(cascade=CascadeType.ALL, fetch=FetchType.LAZY, mappedBy="baseOrg")
public List<BaseRuleEngineLog> getServiceUsedLogs() {
return this.serviceUsedLogs;
}
public void setServiceUsedLogs(List<BaseRuleEngineLog> serviceUsedLogs) {
this.serviceUsedLogs = serviceUsedLogs;
}
#OneToMany(cascade=CascadeType.ALL, fetch=FetchType.LAZY, mappedBy="baseOrg")
public List<ProductInfo> getProductInfos() {
return this.productInfos;
}
public void setProductInfos(List<ProductInfo> productInfos) {
this.productInfos = productInfos;
}
#OneToMany(cascade=CascadeType.ALL, fetch=FetchType.LAZY, mappedBy="baseOrg")
public List<BaseCreditQuery> getBaseCreditQueries() {
return this.baseCreditQueries;
}
public void setBaseCreditQueries(List<BaseCreditQuery> baseCreditQueries) {
this.baseCreditQueries = baseCreditQueries;
}
}
productInfo class:
#Entity
#Table(name="product_info")
#Cache(usage=CacheConcurrencyStrategy.READ_WRITE)
public class ProductInfo implements java.io.Serializable {
private static final long serialVersionUID = 1L;
private String id;
private BaseOrg baseOrg;//baseOrg table
private String code;
private String name;
private String orgcode;
private List<ProductService> productServices = new ArrayList<ProductService>(0);
// Constructors
/** default constructor */
public ProductInfo() {
}
/** minimal constructor */
public ProductInfo(String id) {
this.id = id;
}
// Property accessors
#Id
#Column(name="ID", unique=true, nullable=false, length=50)
public String getId() {
return this.id;
}
public void setId(String id) {
this.id = id;
}
#ManyToOne(fetch=FetchType.LAZY)
#JoinColumn(name="ORGID")
public BaseOrg getBaseOrg() {
return this.baseOrg;
}
public void setBaseOrg(BaseOrg baseOrg) {
this.baseOrg = baseOrg;
}
#Column(name="CODE", length=100)
public String getCode() {
return this.code;
}
public void setCode(String code) {
this.code = code;
}
#Column(name="NAME", length=100)
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
#Column(name="ORGCODE", length=100)
public String getOrgcode() {
return this.orgcode;
}
public void setOrgcode(String orgcode) {
this.orgcode = orgcode;
}
#OneToMany(cascade=CascadeType.ALL, fetch=FetchType.LAZY, mappedBy="productInfo")
public List<ProductService> getProductServices() {
return this.productServices;
}
public void setProductServices(List<ProductService> productServices) {
this.productServices = productServices;
}
}
serviceInfo class
#Entity
#Table(name="service_info")
#Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public class ServiceInfo implements java.io.Serializable {
private static final long serialVersionUID = 1L;
private String id;
private String name;
private String code;
private List<ProductService> productServices = new ArrayList<ProductService>(0);
// Constructors
/** default constructor */
public ServiceInfo() {
}
/** minimal constructor */
public ServiceInfo(String id) {
this.id = id;
}
// Property accessors
#Id
#Column(name="ID", unique=true, nullable=false, length=50)
public String getId() {
return this.id;
}
public void setId(String id) {
this.id = id;
}
#Column(name="NAME", length=100)
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
#Column(name="CODE", length=100)
public String getCode() {
return this.code;
}
public void setCode(String code) {
this.code = code;
}
#OneToMany(cascade=CascadeType.ALL, fetch=FetchType.LAZY, mappedBy="serviceInfo")
public List<ProductService> getProductServices() {
return this.productServices;
}
public void setProductServices(List<ProductService> productServices) {
this.productServices = productServices;
}
}
product_service table
Thank you for forgiving my poor English,this is my first time questioning on Stack Overflow.

OK,I resolve it.
i found its so sample,lol.
Because,most criteria have been packaged.At the first time ,I want to use the HQL to resolve it,but in vain.I just add this sentences,and getted it.
enter image description here

Hibernate Field Annotaion Behaviour

Please help me to understand why hibernate field based annotation works based on the primarykey field?.
Model Class 1 takes docnum field value from getter and Model Class 2 too.Inspite of both places only docnum is annotated based on the getter only.It works based on id field which is having annotaion in field of Model Class 2 and in Model Class 1 based on getter.
Model Class 1:
#Entity(name="RDT_ORDER")
public class Order {
private int id;
private String docnum;
#Id
#Column(name="ORDID")
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
#Column(name="ORD_DOCNUM")
public String getDocnum() {
return docnum+" getter";
}
public void setDocnum(String docnum) {
this.docnum = docnum;
}
}
Model Class 2:
#Entity(name="RDT_ORDER")
public class Order {
private int id;
private String docnum;
#Id
#Column(name="ORDID")
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
#Column(name="ORD_DOCNUM")
public String getDocnum() {
return docnum+" getter";
}
public void setDocnum(String docnum) {
this.docnum = docnum;
}
}
Output :table(RDT_ORDER) values
ID DOCNUM
5 docnum5
6 docnum6 getter

How to write query in hibernate(HQL) to perform 2 joins without mapping?

I want to convert the following query into HQL:
SELECT C.ID, E.DESCRIPTION as STATUS, E1.DESCRIPTION as SUBJECT
FROM CRED C
join CODE_EVN E
ON E.CODE = C.STATUS_CODE
AND E.SUBCODE = C.STATUS_SUBCODE
join CODE_EVN E1
ON E1.CODE = C.SUBJECT_CODE
AND E1.SUBCODE = C.SUBJECT_SUBCODE
I have two classes User and Codes with no mapping in between them, so how do I execute the following query in Hibernate?
I have tried out many things but nothing seems to work
These are my 2 bean classes:
User class:
#Entity
#Table(name="CRED")
public class User {
private String id;
private String STATUS_CODE;
private String STATUS_SUBCODE;
private String SUBJECT_CODE;
private String SUBJECT_SUBCODE;
#Id
#Column(name="ID")
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public void setSTATUS_CODE(String sTATUS_CODE) {
STATUS_CODE = sTATUS_CODE;
}
public String getSTATUS_CODE() {
return STATUS_CODE;
}
public void setSTATUS_SUBCODE(String sTATUS_SUBCODE) {
STATUS_SUBCODE = sTATUS_SUBCODE;
}
public String getSTATUS_SUBCODE() {
return STATUS_SUBCODE;
}
public void setSUBJECT_CODE(String sUBJECT_CODE) {
SUBJECT_CODE = sUBJECT_CODE;
}
public String getSUBJECT_CODE() {
return SUBJECT_CODE;
}
public void setSUBJECT_SUBCODE(String sUBJECT_SUBCODE) {
SUBJECT_SUBCODE = sUBJECT_SUBCODE;
}
public String getSUBJECT_SUBCODE() {
return SUBJECT_SUBCODE;
}
}
Codes class:
#Entity
#Table(name="CODE_EVN")
public class Codes {
#Id
private String CODE;
private String SUBCODE;
private String DESCRIPTION;
public void setCODE(String cODE) {
CODE = cODE;
}
public String getCODE() {
return CODE;
}
public void setSUBCODE(String sUBCODE) {
SUBCODE = sUBCODE;
}
public String getSUBCODE() {
return SUBCODE;
}
public void setDESCRIPTION(String dESCRIPTION) {
DESCRIPTION = dESCRIPTION;
}
public String getDESCRIPTION() {
return DESCRIPTION;
}
}

hibernate many-to-many table mapping with extra fields as a list - Java classes?

I am quite interested in a Hibernate mapping such as the Order/Product/LineItem described here:
http://docs.jboss.org/hibernate/stable/core/reference/en/html/example-mappings.html#example-mappings-customerorderproduct
The documentation seems quite thorough, but I am a bit unclear on the semantics of the Java classes that one would create...
Any hints much appreciated.
Thank you!
Misha

Using that example, you would have classes that looked like the following:
import java.util.HashSet;
import java.util.Set;
public class Customer {
private String name = null;
private Set<Order> orders = new HashSet<Order>();
private long id = 0;
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 Set<Order> getOrders() {
return orders;
}
public void setOrders(Set<Order> orders) {
this.orders = orders;
}
}
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
public class Order {
private long id = 0;
private Date date = null;
private Customer customer = null;
private List<LineItem> lineItems = new ArrayList<LineItem>();
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
public Customer getCustomer() {
return customer;
}
public void setCustomer(Customer customer) {
this.customer = customer;
}
public List<LineItem> getLineItems() {
return lineItems;
}
public void setLineItems(List<LineItem> lineItems) {
this.lineItems = lineItems;
}
}
public class LineItem {
private int quantity = 0;
private Product product = null;
public int getQuantity() {
return quantity;
}
public void setQuantity(int quantity) {
this.quantity = quantity;
}
public Product getProduct() {
return product;
}
public void setProduct(Product product) {
this.product = product;
}
}
public class Product {
private long id = 0;
private String serialNumber = null;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getSerialNumber() {
return serialNumber;
}
public void setSerialNumber(String serialNumber) {
this.serialNumber = serialNumber;
}
}
If you create the tables as per the structure in the example, that should set you up.

They show the UML and the class members in the diagram.
A Customer can have zero to many Order objects (Set).
An Order has at least one to many LineItem objects. {List).
A LineItem entry corresponds to a Product. So LineItem has exactly one Product object.
Not sure what your question is?

Categories

Resources