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--- programming:java:jpa [2023/11/01 07:31] – removed - external edit (Unknown date) 127.0.0.1
+++ programming:java:jpa [2023/11/01 07:31] (current) – ↷ Page moved from camunda:programming:java:jpa to programming:java:jpa skipidar
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+===== 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)
+|<WRAP><code>
+class wood
+@OneToMany
+@JoinColumn(name="wood")
+Set<Tree> tree
+</code></WRAP>| Object **wood**. Property **tree**. One wood has many trees. Property has to be a collection |
+|<WRAP><code>
+class tree
+@ManyToOne
+@JoinColumn(name="tree")
+Wood wood
+</code></WRAP>| Object **tree**. Property **wood**. Many trees in wood. |