programming:java:jpa
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Table of Contents
Java Persistance API
JPA is an API, provided by Oracle.
Hibernate, EclipseLink etc. are implementations of that API.
Entity
Entity Annotaions
These annotations should be red as following:
- The first part is applied to the object, which contains the property
- The second part is applied to propery (which should be an entity)
class wood @OneToMany @JoinColumn(name="wood") Set<Tree> tree | Object wood. Property tree. One wood has many trees. Property has to be a collection |
class tree @ManyToOne @JoinColumn(name="tree") Wood wood | Object tree. Property wood. Many trees in wood. |
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