net.dontdrinkandroot.persistence.entity

Class AbstractEntity<K>

java.lang.Object

net.dontdrinkandroot.persistence.entity.AbstractEntity<K>

Type Parameters:

K - Type of the primary key.

All Implemented Interfaces:

Serializable, Entity<K>

Direct Known Subclasses:

AbstractGeneratedIdEntity, AbstractIdEntity, GeneratedLongIdEntity, LongIdEntity

@MappedSuperclass
public abstract class AbstractEntity<K>
extends Object
implements Entity<K>

Represents an entity with a primary key. The methods getId() and setId() must be implemented, even if the primary key has a different field name, also make sure that the primary key implements equals/hashcode correctly. hashCode() and equals() are based on the id, so make sure not to use the in any context where these methods are important while no id is set (e.g. in HashMaps).

Author:

Philip W. Sorst

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
AbstractEntity() Constructs an entity without the primary key being set.
AbstractEntity(K id) Constructs a new entity with the specified primary key.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object obj)
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.dontdrinkandroot.persistence.entity.Entity

getId, setId

Constructor Detail

AbstractEntity

public AbstractEntity()

Constructs an entity without the primary key being set.

AbstractEntity

public AbstractEntity(K id)

Constructs a new entity with the specified primary key.

Parameters:

id - The primary key.

Method Detail

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object