org.datanucleus.identity

Class DatastoreUniqueLongId

java.lang.Object

org.datanucleus.identity.DatastoreUniqueLongId

All Implemented Interfaces:

Serializable, Comparable, DatastoreId

public class DatastoreUniqueLongId
extends Object
implements Serializable, DatastoreId, Comparable

Identity for use with datastore-identity where the datastore provides a unique "identity" long key per object and hence doesn't need the class name. The behaviour of this class is governed by JDO spec 5.4.3.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
long	key

Constructor Summary

Constructors

Constructor and Description
DatastoreUniqueLongId()
DatastoreUniqueLongId(long key)
DatastoreUniqueLongId(String str) Constructs an OID from its string representation that is consistent with the output of toString().

Method Summary

Modifier and Type	Method and Description
int	compareTo(Object o)
boolean	equals(Object obj)
long	getKey()
Object	getKeyAsObject() Provides the identity in a form that can be used by the database as a key.
String	getTargetClassName() Accessor for the target class name for the persistable object this represents.
int	hashCode()
String	toString() Creates a String representation of the datastore identity, formed from the key value.

Methods inherited from class java.lang.Object

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

Field Detail

key

public final long key

Constructor Detail

DatastoreUniqueLongId

public DatastoreUniqueLongId()

DatastoreUniqueLongId

public DatastoreUniqueLongId(long key)

DatastoreUniqueLongId

public DatastoreUniqueLongId(String str)
                      throws IllegalArgumentException

Constructs an OID from its string representation that is consistent with the output of toString().

Parameters:

str - the string representation of an OID

Throws:

IllegalArgumentException - if the given string representation is not valid.

See Also:

toString()

Method Detail

getKeyAsObject

public Object getKeyAsObject()

Description copied from interface: DatastoreId

Provides the identity in a form that can be used by the database as a key.

Specified by:

getKeyAsObject in interface DatastoreId

Returns:

The key value

getKey

public long getKey()

getTargetClassName

public String getTargetClassName()

Description copied from interface: DatastoreId

Accessor for the target class name for the persistable object this represents.

Specified by:

getTargetClassName in interface DatastoreId

Returns:

the class name of the persistable

equals

public boolean equals(Object obj)

Specified by:

equals in interface DatastoreId

Overrides:

equals in class Object

compareTo

public int compareTo(Object o)

Specified by:

compareTo in interface Comparable

hashCode

public int hashCode()

Specified by:

hashCode in interface DatastoreId

Overrides:

hashCode in class Object

toString

public String toString()

Creates a String representation of the datastore identity, formed from the key value. This will be something like

3254

Specified by:

toString in interface DatastoreId

Overrides:

toString in class Object

Returns:

The String form of the identity