I have stored jsonb object in postgresql like
{"sample": {"lastName": "Sahani", "firstName": "Sanjay"}, "address": "Address2", "bedrooms": 2, "postcode": "40 BS", "propertyType": "Type 2"}
My table name is valuation_report_json
and jsonb column name is params
I can get address using Specification but unable to get sample's firstName
My specification is
public class ValuationReportJSONSpecification implements Specification<ValuationReportJSON>{
private String locale;
private String fieldToSearch;
private String localeParameter;
public ValuationReportJSONSpecification(String locale, String fieldToSearch,String localeParameter) {
this.locale = locale;
this.fieldToSearch = fieldToSearch;
this.localeParameter=localeParameter;
}
#Override
public Predicate toPredicate(Root<ValuationReportJSON> root, CriteriaQuery<?> query, CriteriaBuilder cb) {
// TODO Auto-generated method stub
System.err.println("INSIDE");
// return cb.equal(cb.function("jsonb_extract_path_text", String.class, root.<String>get("params"), cb.literal(this.locale)), this.fieldToSearch);
return cb.equal(cb.function("jsonb_extract_path_text", String.class,root.<String>get("params"), cb.literal(this.locale),cb.literal(this.localeParameter)),this.fieldToSearch);
}
}
My models are
ValuationReportJSON :
#Data
#NoArgsConstructor
#Entity
#JsonIgnoreProperties(ignoreUnknown = true)
#Table(name = "valuation_report_json")
#TypeDef(name = "jsonb", typeClass = JsonBinaryType.class)
public class ValuationReportJSON implements Serializable{
/**
*
*/
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#Type(type = "jsonb")
#Column(name = "parameters", nullable = false,columnDefinition = "jsonb")
private Params params;
#OneToOne(cascade = CascadeType.PERSIST)
#JoinColumn(name = "property_id", nullable = true)
private Property property;
#Column(name = "entry_id", nullable = true)
private Integer entryId;
#Column(name = "report_data", nullable = true, columnDefinition = "text")
private String reportData;
#Column(name = "entry_date", nullable = true)
#CreationTimestamp
private Timestamp entryDate;
#Column(name = "modified_date", nullable = true)
#UpdateTimestamp
private Timestamp modifiedDate;
//getter setter
}
Params
#Data
#NoArgsConstructor
#AllArgsConstructor
public class Params implements Serializable{
/**
*
*/
private static final long serialVersionUID = 1L;
public String address;
private String postcode;
private SampleObj sample;
private int bedrooms;
//getter setter
}
SampleObj:
#Data
#NoArgsConstructor
#AllArgsConstructor
public class SampleObj implements Serializable{
/**
*
*/
private static final long serialVersionUID = 1L;
private String firstName;
private String lastName;
//getter setter
}
I cannot use join in predicate as my objects are not having mapping or not an entity.
because i have seen same question but objects were entity :Specification/Predicate to Search Nested Objects
Related
I am using queryDSL to fetch the inner collection of data and failed to do so. My entities are
#Entity
#Table(name = "countries")
#Setter
#Getter
public class Country {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
private Long countryId;
#Column(name = "name")
private String name;
#Column(name = "data")
private String data;
#OneToOne(mappedBy = "country")
private State stateJoin;
}
#Entity
#Table(name = "states")
#Setter
#Getter
public class State {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
private Long stateId;
#Column(name = "name")
private String name;
#Column(name = "count")
private String count;
#Column(name = "co_id")
private Long countryId;
#OneToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "co_id", referencedColumnName = "id", updatable = false, insertable = false)
private Country country;
#OneToMany(cascade = CascadeType.ALL)
#JoinColumn(name = "state_id", referencedColumnName = "id")
private Set<Town> towns;
}
#Entity
#Table(name = "towns")
#Setter
#Getter
public class Town {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "town_id")
private Long townId;
#Column(name = "name")
private String name;
#Column(name = "people_count")
private String peopleCount;
#Column(name = "st_id")
private Long stateId;
}
and in querydsl i am trying below query and always failing to retrieve inner collection towns
List<Expression> childGroup = new ArrayList<>();
query.from(countries);
childGroup.addAll(Arrays.asList(countries.name, countries.data, countries.stateJoin));
query.join(countries.stateJoin, State);
childGroup.add(Projections.bean(State.class, name, count, town)
.as((Path) countries.stateJoin));
OR
childGroup.add(Projections.bean(State.class, name, count, list(town)).as((Path) countries.stateJoin));
query.select(fields);
query.where();
final Map<? extends Number, ? extends Object> t =
(Map<? extends Number, ? extends Object>)
query
.limit(pageRequest.getPageSize())
.offset(pageRequest.getOffset())
.distinct()
.transform(
GroupBy.groupBy(groupByPath)
.as(Projections.bean(Countris.class, childGroup.toArray(new Expression[0]))));
while executing the above line exactly i am getting always SQLSyntax error as i see the underlying SQL is with
. as towns
Can some one help me how to read the nested collection formed by JPA join?
I have Company entity:
#Entity
#Data
public class Company {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "company_id", nullable = false, unique = true)
private int companyId;
#Column(name = "name", nullable = false, length = 255, unique = true)
private String name;
#JsonIgnore
#OneToMany (mappedBy = "company")
private List<Employee> employeeList;
}
And Employee entity:
#Entity
#Data
public class Employee {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "employee_id", nullable = false, unique = true)
private int employeeId;
#Column(name = "employee_name", nullable = false)
private String name;
#ManyToOne(optional = false)
#JoinColumn(name = "company_id", nullable = false)
private Company company;
}
I have trouble when I'm mapping EmployeeRequest to Employee object.
This is EmployeeRequest:
#Data
public class EmployeeRequest {
private String name;
private int companyId;
}
As you can see here in request I have companyId which is integer and therefore I have error.
My mapper:
#Component
public class EmployeeMapper {
private Mapper mapper = DozerBeanMapperBuilder.buildDefault();
public Employee transformToEmployeeEntity(EmployeeRequest employeeRequest) {
return mapper.map(employeeRequest, Employee.class);
}
}
I think it makes sense to have an integer as data type in EmployeeRequest. So what is proper way to solve this?
How can I map the one to many relationship using org.mapstruct framework?
DTO classes:
#Data
public class ScheduledJobDTO {
private String jobName;
private String jobGroup;
private String jobClass;
private String cronExpression;
private Boolean cronJob;
private Long repeatTime;
private Integer repeatCount;
private Set<ScheduledJobParamsDTO> paramtersDTOs;
}
#Data
#EqualsAndHashCode
public class ScheduledJobParamsDTO {
String name;
String value;
}
Domain Classes -
#Data
#Entity
#Table(name = "scheduled_job")
public class ScheduledJob {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#Column(name = "job_name")
private String jobName;
#Column(name = "job_group")
private String jobGroup;
#Column(name = "job_class")
private String jobClass;
#Column(name = "cron_expression")
private String cronExpression;
#Column(name = "is_cron_job")
private Boolean cronJob;
#Column(name = "repeat_time")
private Long repeatTime;
#Column(name = "repeat_count")
private Integer repeatCount;
#Column(name = "trigger_start_date")
private LocalDate triggerStartDate;
#Column(name = "trigger_end_date")
private LocalDate triggerEndDate;
#Column(name = "created_at")
private LocalDate createdAt;
#Column(name = "modified_at")
private LocalDate modifiedAt;
#Column(name = "is_active")
private Boolean active;
#OneToMany(mappedBy = "scheduledJob")
private Set<ScheduledJobParams> parameters;
}
#Data
#Entity
#Table(name = "scheduled_job_params")
#EqualsAndHashCode
public class ScheduledJobParams {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
Long id;
#ManyToOne(fetch = FetchType.LAZY, optional = false)
#JoinColumn(name = "scheduled_job_id", nullable = false)
ScheduledJob scheduledJob;
String name;
String value;
}
Mapper Class -
#Mapping(source = ".", target = ".")
#Mapping(source = "paramtersDTOs", target = "parameters")
ScheduledJob mapToDomain(ScheduledJobDTO scheduledJobDTO);
Now, the above mapper is mapping the ScheduledJob & ScheduledJobParams, but the ScheduledJobParams has reference of ScheduledJob.
How can I map the reference ScheduledJob to ScheduledJobParams?
You can achieve that through #AfterMapping with #MappedTarget. This is described in the reference documentation: 12.2. Mapping customization with before-mapping and after-mapping methods.
// Java 8+ otherwise you need to use an abstract class and a for-loop instead
#Mapper(componentModel = "spring")
public interface ScheduledJobMapper {
#Mapping(target = "parameters", source = "paramtersDTOs")
ScheduledJob mapToDomain(ScheduledJobDTO dto);
#AfterMapping
default void after(#MappingTarget ScheduledJob domain, ScheduledJobDTO dto) {
domain.getParameters().forEach(scheduledJobParams -> {
scheduledJobParams.setScheduledJob(domain);
});
}
}
However, I am sure you don't need to fill the bidirectional relationship when you map back from the DTO into the entity (this is what I understand as you refer to "domain"). Note printing out or serializing such object i.e. into JSON or XML throws java.lang.StackOverflowError if not properly handled.
I have two tables one is parent and other one is child. When I am trying to save initially, I am able to insert values in both the tables if values not present in Parent table. But at the time of update/insert the values in child table, it is inserting duplicate values.
#Data
#Builder
#NoArgsConstructor
#AllArgsConstructor
public class RuleApi {
Long id;
private String market;
private int modelYear;
private String vehicleLine;
private String vehicleLineName;
private String locale;
private String binding;
private String description;
private String createUser;
private String updateUser;
}
#Data
#Builder
#NoArgsConstructor
#AllArgsConstructor
public class DescriptorSaveRequest {
#Valid
#NotNull
RuleApi rule;
}
#Data
#Builder
#NoArgsConstructor
#AllArgsConstructor
#Entity
#Table(name = "MNAVS03_DESCRIPTOR_CONTEXT")
#EntityListeners(AuditingEntityListener.class)
public class DescriptorContext implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Setter(value = AccessLevel.NONE)
#Column(name = "NAVS03_DESCRIPTOR_CONTEXT_K")
private Long id;
#Column(name = "NAVS03_MARKET_N")
private String market;
#Column(name = "NAVS03_MODEL_YEAR_R")
private Integer modelYear;
#Column(name = "NAVS03_VEHICLE_LINE_C")
private String vehicleLine;
#Column(name = "NAVS03_VEHICLE_LINE_N")
private String vehicleLineName;
#Column(name = "NAVS03_LOCALE_N")
private String locale;
#Column(name = "NAVS03_CREATE_USER_C", nullable = false)
private String createUserId;
#CreationTimestamp
#Column(name = "NAVS03_CREATE_S")
private Timestamp createTimestamp;
#Column(name = "NAVS03_LAST_UPDT_USER_C", nullable = false)
private String updateUserId;
#UpdateTimestamp
#Column(name = "NAVS03_LAST_UPDT_S")
private Timestamp updateTimestamp;
}
#Data
#Builder
#NoArgsConstructor
#AllArgsConstructor
#Entity
#Table(name = "MNAVS04_DESCRIPTOR_RULE")
#EntityListeners(AuditingEntityListener.class)
public class DescriptorRule implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Setter(value = AccessLevel.NONE)
#Column(name = "NAVS04_DESCRIPTOR_RULE_K")
private Long id;
#JoinColumn(name = "NAVS03_DESCRIPTOR_CONTEXT_K", nullable = false)
#ManyToOne(fetch = FetchType.LAZY, cascade = {CascadeType.ALL})
private DescriptorContext descriptorContextId;
#Column(name = "NAVS04_BINDING_N",
unique = true)
private String binding;
#Column(name = "NAVS04_DESCRIPTOR_RULE_X")
private String description;
#Column(name = "NAVS04_CREATE_USER_C", nullable = false)
private String createUserId;
#CreationTimestamp
#Column(name = "NAVS04_CREATE_S")
private Timestamp createTimestamp;
#Column(name = "NAVS04_LAST_UPDT_USER_C", nullable = false)
private String updateUserId;
#UpdateTimestamp
#Column(name = "NAVS04_LAST_UPDT_S")
private Timestamp updateTimestamp;
}
#ApiOperation(value = "Create/Update Feature Descriptions", notes = "Create/Update a descriptions based on the given input")
#PostMapping("/descriptor/saveFeatures")
public ResponseEntity<BaseBodyResponse<String>> saveFeatureDescriptions(#Valid #RequestBody DescriptorSaveRequest descriptorSaveRequest) throws Exception {
this.descriptorContextService.saveFeatureDescriptions(
this.descriptorContextMapper.mapDescriptorContext(descriptorSaveRequest),
this.descriptorContextMapper.mapDescriptorRule(descriptorSaveRequest)
);
return ResponseEntity.ok(BaseBodyResponse.result("Saved Successfully"));
}
#Service
public class DescriptorContextService {
//SaveFeatureDescriptions
public void saveFeatureDescriptions(DescriptorContext descriptorContext, DescriptorRule descriptorRule) throws Exception {
DescriptorContext descriptorContext1 =
this.descriptorContextRepository.findByMarketAndModelYearAndVehicleLineAndVehicleLineNameAndLocale(
descriptorContext.getMarket(),
descriptorContext.getModelYear(),
descriptorContext.getVehicleLine(),
descriptorContext.getVehicleLineName(),
descriptorContext.getLocale());
if (descriptorContext1 == null) {
// add a new context
descriptorContext1 = descriptorContextRepository.save(DescriptorContext.builder()
.market(descriptorContext.getMarket())
.modelYear(descriptorContext.getModelYear())
.vehicleLine(descriptorContext.getVehicleLine())
.vehicleLineName(descriptorContext.getVehicleLineName())
.locale(descriptorContext.getLocale())
.createUserId(descriptorContext.getCreateUserId())
.updateUserId(descriptorContext.getUpdateUserId())
.build());
}
Long contextId = descriptorContext1.getId();
List<DescriptorRule> rule = this.descriptorRuleRepository.findByDescriptorContextId(contextId);
if (rule.size() == 0) {
// add a new rule
this.descriptorRuleRepository.save(DescriptorRule.builder()
.descriptorContextId(descriptorContext1)
.binding(descriptorRule.getBinding())
.description(descriptorRule.getDescription())
.createUserId(descriptorContext.getCreateUserId())
.updateUserId(descriptorContext.getUpdateUserId())
.build());
} else {
// update a existing rule
for (DescriptorRule descriptorRule1 : rule) {
if (descriptorRule1.getBinding().equals(descriptorRule.getBinding())) {
descriptorRule1.setDescription(descriptorRule.getDescription());
descriptorRule1.setupdateUserId(descriptorRule.getupdateUserId());
this.descriptorRuleRepository.save(descriptorRule1);
} else {
this.descriptorRuleRepository.save(DescriptorRule.builder()
.descriptorContextId(descriptorContext1)
.binding(descriptorRule.getBinding())
.description(descriptorRule.getDescription())
.createUserId(descriptorContext.getCreateUserId())
.updateUserId(descriptorContext.getUpdateUserId())
.build());
}
}
}
}
}
}
#Component
public class DescriptorContextMapper {
public DescriptorContext mapDescriptorContext(DescriptorSaveRequest descriptorSaveRequest) {
return DescriptorContext.builder()
.market(descriptorSaveRequest.getRule().getMarket())
.vehicleLine(descriptorSaveRequest.getRule().getVehicleLine())
.vehicleLineName(descriptorSaveRequest.getRule().getVehicleLineName())
.modelYear(descriptorSaveRequest.getRule().getModelYear())
.locale(descriptorSaveRequest.getRule().getLocale())
.createUserId(descriptorSaveRequest.getRule().getCreateUser())
.updateUserId(descriptorSaveRequest.getRule().getUpdateUser())
.build();
}
public DescriptorRule mapDescriptorRule(DescriptorSaveRequest descriptorSaveRequest) {
return DescriptorRule.builder()
.id(descriptorSaveRequest.getRule().getId())
.binding(descriptorSaveRequest.getRule().getBinding())
.description(descriptorSaveRequest.getRule().getDescription())
.createUserId(descriptorSaveRequest.getRule().getCreateUser())
.updateUserId(descriptorSaveRequest.getRule().getUpdateUser())
.build();
}
}
{
"rule": {
"binding": "5003",
"description": "Test new 5003-2023 Escape",
"locale": "fr_CA",
"market": "WANAC",
"modelYear": 2023,
"vehicleLine": "TMC",
"vehicleLineName": "Escape",
"createUser": "rdongre",
"updateUser": "rdongre"
}
}
If I am passing this request and values are not present in both the tables then it should insert the values in both the tables which is working as expected with above code. But at the time of update it is going inside the loop and inserting duplicate values. I am trying to update DESCRIPTION in child table if BINDING is present if not it should insert BINDING plus DESCRIPTION
I fixed this by separating Save and Update methods. Thanks to all.
I am new to JPA and doing a small sample to learn about it.
But I got one problem below, please help me out, and please explain why:
I have class Customer.java, which is mapped to table customer in db:
#Entity
public class Customer implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#Column(name = "id_customer")
#GeneratedValue(strategy=GenerationType.IDENTITY)
private Long id;
// accountNumber field maps with accountNumber column in Account table
#Column(name = "loginId", unique = true)
private String loginId;
#Column(name = "password")
private String password;
#Column(name = "firstName")
private String firstName;
#Column(name = "lastName")
private String lastName;
#Column(name = "address")
private String address;
#Column(name = "email")
private String email;
#Column(name = "phone")
private String phone;
#OneToMany(mappedBy="customer")
private List<Account> accountList;
#OneToMany(mappedBy="customer")
private List<Card> cardList;
// getters and setters goes here
}
The above class has two lists, accountList and cardList, their generic Class (Card and Account) extends BaseInfo using Single table Inheritance.
Here is my BaseInfo.java:
#Entity
#Table(name = "account")
#Inheritance(strategy = InheritanceType.SINGLE_TABLE)
#DiscriminatorColumn(name = "discriminator", discriminatorType = DiscriminatorType.STRING)
public class BaseInfo implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#Column(name = "number")
private String number;
#Column(name = "availableNumber")
private Long availableNumber;
//getter and setter here
}
Class Card.java:
#Entity
#Table(name = "account")
#Inheritance(strategy = InheritanceType.SINGLE_TABLE)
#DiscriminatorValue(value = "C")
public class Card extends BaseInfo implements Serializable {
private static final long serialVersionUID = 1L;
#Column(name = "cardType")
private String cardType;
#ManyToOne
#JoinColumn(name = "id_customer")
private Customer customer;
//getter and setter
}
And class Account.java:
#Entity
#Table(name = "account")
#Inheritance(strategy = InheritanceType.SINGLE_TABLE)
#DiscriminatorValue(value = "A")
public class Account extends BaseInfo implements Serializable {
private static final long serialVersionUID = 1L;
#Column(name = "accountName")
private String accountName;
#Column(name = "accountType")
private String accountType;
#Temporal(TemporalType.TIMESTAMP)
#Column(name = "dt_created")
private Date createdDate;
#Temporal(TemporalType.TIMESTAMP)
#Column(name = "dt_lst_updt")
private Date lastUpdatedDate;
#ManyToOne
#JoinColumn(name = "id_customer")
private Customer customer;
//getter, setter
}
Then, I do a query that query customer from database with loginid and password, like this:
entityTransaction.begin();
TypedQuery<Customer> query = entityManager.createQuery(
"SELECT c FROM " + Customer.class.getName()
+ " c Where c.loginId= :loginId", Customer.class);
query.setParameter("loginId", loginId);
res = query.getSingleResult();
entityTransaction.commit();
The code run with no error, but the result is somethings strange to me: When I debug (or print out the result to jsp), accountList or cardList contains all Account of that customer, just like they don't care about the 'discriminator' column.
I have 2 questions:
How can I archive the goal that listCard contains only Card (discrimination = c) and listAccount contains only Account (discriminator = a) ?
Is there an alternative way to query listCard or listAccount without query the customer first (like I use) ??
Thank in advance! :D
I'm not sure if it's a JPA restriction or a Hibernate-specific restriction, but you may not use the same column to map two different associations.
You should use something like car_customer_id to map the association between customer and cards, and account_customer_id to map the association between customer and accounts.