Hibernate is an object-relational mapping (ORM) library for the Java language enabling developers to utilize POJO-style domain models in their applications in ways extending well beyond Object/Relational Mapping.
Hibernate is the umbrella for a collection of libraries, most notably Hibernate ORM which provides Object/Relational Mapping for java domain objects.
In addition to its own "native" API, Hibernate ORM is also an implementation of the Java Persistence API (jpa) specification.
I need a many to many hibernate mapping needed 3 joins. I've tried to find out a solution without intermediate entity like LecturerCourse.
I have a many to many relation in my database between my lecturer and course tables. A course can be given by…
Say, I have following entities:
@Entity
public class A {
@Id
@GeneratedValue
private Long id;
@Embedded
private B b;
//getters and setters
}
@Embeddable
public class B {
@OneToMany
private List cList;
//getters and…
I need to convert a Hibernate criteria query like the following
curList = session.createCriteria(Islem.class)
.createAlias("workingDay", "d")
.setProjection(Projections.sum("amount"))
…
I am passing a list of Strings to my query(SQL query written) to fetch the required data.
But I am getting this exception:
ora-01795 maximum number of expressions in a list is 1000
I checked that I have more than 1000 entries in the list passed…
I am not able to understand advantages of using Hibernate Callback method, are there any advantages or specific use case where we should go for it.
public List findRecentRequests(final int offset, final int length)
{
List list =…
I'm trying to set up my project using Spring 3.1 and Hibernate 4. I've been following some tutorials online. I'm getting a strange error that according to the spring forums should have been fixed with Spring 3.1. Spring Bug Tracker
When my…
I want to create database schema in hibernate first time. And further, if there is any modification in the schema, like addition of a new table or deletion of some column, I want to update the existing schema keeping the previous data intact.
As per…
With generated Java source code, like
code generated with Hibernate tools
code generated with JAXB schema binding (xjc)
code generated with WDSL2Java (cxf)
all generated classes are "value object" types, without business logic. And if I add…
I have the following entity (only relevant mappings shown):
@Entity
@Table(name = "PQs")
public class PQ implements Serializable
{
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column
private Integer id;
@Column
…
After configuring EhCache v2.4.5 as the second level cache for hibernate v3.6.7 I get the following error while trying to load all objects of a particular entity using hibernate session. (There is no error for loading the objects for the first…
I am trying to map a PostgreSQL custom type,named transmission_result, to a Hibernate/JPA POJO. The PostgreSQL custom type is more or less an enum type of string values.
I have created a custom EnumUserType called PGEnumUserType as well as an enum…
I receive the following exception when I'm trying to alter my @ID in an @Entity.
identifier of an instance of com.google.search.pagerank.ItemEntity was altered from 1 to 2.
I know that I'm altering the primary key in my table. I'm using…
I've just upgraded the version I use for Hibernate to 5.6.1 and it seems it's now deprecating some Type-related annotations:
@TypeDef(name = "json", typeClass = JsonBinaryType::class)
@Type(type = "json")
I found no documentation as to what to do…
I am getting the following error:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.transaction.interceptor.TransactionAttributeSourceAdvisor': Cannot create inner bean '(inner bean)' while…
I need to take hql that is currently :
select distinct a from Asset as a where ...
and change it to
select new com.org.AssetDTO(a.id, a.address, a.status) from Asset as a where ...
My problem is with the distinct keyword. Where does it belong in…
