javax.jdo.identity

Class ObjectIdentity

Implemented Interfaces:
Externalizable

public class ObjectIdentity
extends SingleFieldIdentity

This class is for identity with a single Object type field.
Version:
2.0

Field Summary

Fields inherited from class javax.jdo.identity.SingleFieldIdentity

hashCode, keyAsObject, msg

Constructor Summary

ObjectIdentity()
Constructor only for Externalizable.
ObjectIdentity(Class pcClass, Object param)
Constructor with class and key.

Method Summary

boolean
equals(Object obj)
Determine if the other object represents the same object id.
Object
getKey()
Return the key.
void
readExternal(ObjectInput in)
Read this object.
String
toString()
Return the String form of the object id.
void
writeExternal(ObjectOutput out)
Write this object.

Methods inherited from class javax.jdo.identity.SingleFieldIdentity

assertKeyNotNull, createKeyAsObject, equals, getKeyAsObject, getTargetClass, getTargetClassName, hashClassName, hashCode, readExternal, setKeyAsObject, writeExternal

Constructor Details

ObjectIdentity

public ObjectIdentity()
Constructor only for Externalizable.

ObjectIdentity

public ObjectIdentity(Class pcClass,
                      Object param)
Constructor with class and key.
Parameters:
pcClass - the class
param - the key

Method Details

equals

public boolean equals(Object obj)
Determine if the other object represents the same object id.
Overrides:
equals in interface SingleFieldIdentity
Parameters:
obj - the other object
Returns:
true if both objects represent the same object id

getKey

public Object getKey()
Return the key.
Returns:
the key

readExternal

public void readExternal(ObjectInput in)
            throws IOException,
                   ClassNotFoundException
Read this object. Read the superclass first.
Overrides:
readExternal in interface SingleFieldIdentity
Parameters:
in - the input

toString

public String toString()
Return the String form of the object id. The class of the object id is written as the first part of the result so that the class can be reconstructed later. Then the toString of the key instance is appended. During construction, this process is reversed. The class is extracted from the first part of the String, and the String constructor of the key is used to construct the key itself.
Returns:
the String form of the key

writeExternal

public void writeExternal(ObjectOutput out)
            throws IOException
Write this object. Write the superclass first.
Overrides:
writeExternal in interface SingleFieldIdentity
Parameters:
out - the output