Package org.apache.openjpa.util

Class OpenJPAId

java.lang.Object

org.apache.openjpa.util.OpenJPAId

All Implemented Interfaces:

Serializable, Comparable

Direct Known Subclasses:

BigDecimalId, BigIntegerId, BooleanId, ByteId, CharId, DateId, DoubleId, FloatId, Id, IntId, LongId, ObjectId, ShortId, StringId, UuidId

public abstract class OpenJPAId
extends Object
implements Comparable, Serializable

Identity class extended by built-in OpenJPA identity objects.

Author:

Steve Kim

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	subs
protected Class	type
static char	TYPE_VALUE_SEP

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	OpenJPAId()
protected	OpenJPAId(Class type)
protected	OpenJPAId(Class type, boolean subs)

Method Summary

Modifier and Type	Method	Description
int	compareTo(Object other)
boolean	equals(Object o)
abstract Object	getIdObject()	Return the identity value as an object.
Class	getType()	Return the persistent class which this id instance represents.
int	hashCode()	Generate the hash code for this Id.
boolean	hasSubclasses()	Whether this oid might be for a subclass of the given type.
protected abstract boolean	idEquals(OpenJPAId other)	Compare the id to the id of the given instance.
protected abstract int	idHash()	Return the id's hash code.
void	setManagedInstanceType(Class type)	Set the exact type of the described instance once it is known.
void	setManagedInstanceType(Class type, boolean subs)	Set the exact type of the described instance once it is known.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

TYPE_VALUE_SEP

public static final char TYPE_VALUE_SEP

See Also:

Constant Field Values

type

protected Class type

subs

protected boolean subs

Constructor Detail

OpenJPAId

protected OpenJPAId()

OpenJPAId

protected OpenJPAId(Class type)

OpenJPAId

protected OpenJPAId(Class type,
                    boolean subs)

Method Detail

getType

public Class getType()

Return the persistent class which this id instance represents.

hasSubclasses

public boolean hasSubclasses()

Whether this oid might be for a subclass of the given type. Defaults to true.

setManagedInstanceType

public void setManagedInstanceType(Class type)

Set the exact type of the described instance once it is known.

setManagedInstanceType

public void setManagedInstanceType(Class type,
                                   boolean subs)

Set the exact type of the described instance once it is known.

getIdObject

public abstract Object getIdObject()

Return the identity value as an object.

idHash

protected abstract int idHash()

Return the id's hash code.

idEquals

protected abstract boolean idEquals(OpenJPAId other)

Compare the id to the id of the given instance.

hashCode

public int hashCode()

Generate the hash code for this Id. Cache the type's generated hash code so that it doesn't have to be generated each time.

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

compareTo

public int compareTo(Object other)

Specified by:

compareTo in interface Comparable