؟ JPA.

؞
JPA.
қ src JPA.
Java .
Java.
.
ן ݞ آ ޟ Java ޟ @Entity, ؞ ޟ .

.

ޟ @Inheritance , ן ן ( JSR 220):

  • SINGLE_TABLE -- . ޟ ן.

  • TABLE_PER_CLASS -- .

  • JOINED -- . - ޣ ݟ ( ޟ ), ޣ ޣ ݟ . ޣ - ݟ ޣ ݟ .

XML XML ؞ XML ޟ orm.xml.

ݟ ޟ ޟ ޟ. ޟ ޣ ޟ META-INF/orm.xml.



 



؟ JPA

 



آ ؟ JPA