JPA - Persistence Operations
- JPA - Entity Managers
- JPA - Create Employee Example
- JPA - Update Employee Example
- JPA - Find Employee Example
- JPA - Delete Employee Example
- JPA - Criteria API
JPA - JPQL
- JPA - JPQL
- JPA - Scalar Function
- JPA - Aggregate Function
- JPA - Between Keyword
- JPA - Like Keyword
- JPA - Order By Clause
- JPA - Named Query
JPA - Advanced Mappings
- JPA - Advanced Mappings
- JPA - Single Table Strategy
- JPA - Joined Table Strategy
- JPA - Table per Class Strategy
JPA - Entity Relationships
- JPA - Entity Relationships
- JPA - @ManyToOne Relationships
- JPA - @OneToMany Relationships
- JPA - @OneToOne Relationships
- JPA - @ManyToMany Relationships
JPA - Useful Resources
JPA - Advanced Mappings
JPA is a library which is released with java specification. Therefore, it supports all object oriented concepts for entity persistence. Till now we are done with the basics of object relational mapping. This chapter takes you through the advanced mappings between objects and relational entities.
Inheritance Strategies
Inheritance is the core concept of object oriented language, therefore we can use inheritance relationships or strategies between entities. JPA support three types of inheritance strategies such as SINGLE_TABLE, JOINED_TABLE, and TABLE_PER_CONCRETE_CLASS.
Let us consider an example of Staff, TeachingStaff, NonTeachingStaff classes and their relationships as follows:
In the above shown diagram Staff is an entity and TeachingStaff and NonTeachingStaff are the sub entities of Staff.
In coming chapters, we're discussing all three strategies of inheritance.