com.brienwheeler.lib.db.domain

Class GeneratedIdEntityBase<EntityType extends GeneratedIdEntityBase<EntityType>>

java.lang.Object

com.brienwheeler.lib.db.domain.GeneratedIdEntityBase<EntityType>

Direct Known Subclasses:

VersionedGeneratedIdEntityBase

@MappedSuperclass
public abstract class GeneratedIdEntityBase<EntityType extends GeneratedIdEntityBase<EntityType>>
extends Object

A common base class for all database entity objects. It includes a generated long id value (which will be 0 for all unpersisted objects), a useful toString() method, and hashCode() and equals() methods for good behavior with respect to Collections.

Author:

Brien Wheeler

Constructor Summary

Constructors

Constructor and Description
GeneratedIdEntityBase()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object obj)
DbId<EntityType>	getDbId()
long	getId()
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

GeneratedIdEntityBase

public GeneratedIdEntityBase()

Method Detail

getId

public long getId()

Returns:

the Entity's database id, or 0 if not yet persisted

getDbId

public DbId<EntityType> getDbId()

toString

public String toString()

Overrides:

toString in class Object

Returns:

"[ClassName:unpersisted]" or "[ClassName:]"

hashCode

public int hashCode()

Overrides:

hashCode in class Object

Returns:

if persisted, the integer value of the database id, otherwise the System.identityHashCode of the object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

Returns:

true if obj is the same JVM object as this, or obj and this are both persisted database objects of the same class with the same id.