Hibernate Field Annotaion Behaviour - java

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

Related

Count the affected rows on insert

I'm trying to get the affected rows on insert. I've seen some solution on how to do it but I don't know how to apply it on my code. I'm using spring boot and I haven't mastered it yet. This is my sample code:
Model:
#Entity
#Table(name="test_table")
public class TestTable {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
#Column(name = "name")
private String name;
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;
}
}
Repository:
public interface TestTableRepository extends CrudRepository<TestTable, Long> {
}
Service:
public interface TestTableService {
public void saveOrUpdate(TestTable testTable);
}
Service Impl:
#Override
public void saveOrUpdate(TestTable testTable) {
testTableRepository.save(testTable);
}
There are some unique rows so I need to know if it inserted or not.
Hoping you could help me. Thank you

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 mapping non-entity class with List

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?

Spring Data Query Construction Using Method Name and Object Parameter

I was wondering if it was possible to not need the #Query annotation and let Spring Data construct the JPA Query based on my method name and method parameters for the below entity relationship. I want to retrieve a list of ItemLocations that are related to a particular Item. I tried the below signature and it didn't work without the #Query. Is it also more proper (efficient/effective) to pass in the Item.id instead of the Item object itself?
Spring Data Version: 1.3.4.RELEASE
Working Spring Data Repository API:
#Query("FROM ItemLocation where item = ?")
public List<ItemLocation> getAllItemLocations(Item item);
Desired Spring Data Repository API:
public List<ItemLocation> findAllItemLocations(Item item);
JPA Enties:
#Entity
public class ItemLocation {
#ManyToOne
#JoinColumn(name="fk_item_id")
public Item getItem() {
return this.item;
}
public void setItem(Item item) {
this.item = item;
}
#Id
#GeneratedValue
public long getId() {
return this.id;
}
public void setId(long id) {
this.id = id;
}
private Item item;
private long id;
}
#Entity
public class Item {
#OneToMany(mappedBy="item", orphanRemoval=true)
#Cascade({org.hibernate.annotations.CascadeType.PERSIST})
public Set<ItemLocation> getItemLocationList() {
return this.itemLocationList;
}
public void setItemLocationList(Set<ItemLocation> list) {
this.itemLocationList = list;
}
#Id
#GeneratedValue
public long getId() {
return this.id;
}
public void setId(long id) {
this.id = id;
}
private Set<ItemLocation> itemLocationList
= new HashSet<ItemLocation>();
private long id;
}

public List<ItemLocation> findAllByItem(Item item);
(in repository ItemLocationRepository)

Categories

Resources