net.derquinse.common.orm

Class AbstractEntity<ID extends Serializable>

java.lang.Object

net.derquinse.common.orm.AbstractEntity<ID>

Type Parameters:

ID - Primary Key type.

All Implemented Interfaces:

Entity<ID>

Direct Known Subclasses:

MappedLongEntity, MappedStringEntity, MappedUUIDEntity

public abstract class AbstractEntity<ID extends Serializable>
extends Object
implements Entity<ID>

Abstract class for entities with a primary identifier.

Author:

Andres Rodriguez

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractEntity() Contructor.

Method Summary

Modifier and Type	Method and Description
protected <T extends Entity<ID>> T	idEquals(Class<? extends T> type, Object obj) Checks if an object is an instance of an entity type and its id is equals to this entity id.
protected int	idHashCode() Returns the hash code of the id of the entity.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface net.derquinse.common.orm.Entity

getId

Constructor Detail

AbstractEntity

protected AbstractEntity()

Contructor.

Method Detail

idEquals

protected final <T extends Entity<ID>> T idEquals(Class<? extends T> type,
                                                  Object obj)

Checks if an object is an instance of an entity type and its id is equals to this entity id.

Parameters:

type - Entity type.

obj - Object to check.

Returns:

The object casts to type if the object is an instance of type and the object and this entity have the same id (even if the id is null). Null otherwise.

idHashCode

protected final int idHashCode()

Returns the hash code of the id of the entity. If the id is null a constant number is returned.