341 words

javax.jdo.identity.ObjectIdentity - JDO class

javax.jdo.identity
Class ObjectIdentity

java.lang.Object
    javax.jdo.identity.SingleFieldIdentity
        javax.jdo.identity.ObjectIdentity
Implemented Interfaces:
Externalizable, Serializable, Comparable
This class is for identity with a single Object type field.
Since:
JDO 1.0
Constructor only for Externalizable.
Constructor only for Externalizable.
Since:
JDO 1.0
ObjectIdentity(Class pcClass, Object param)
Constructor with class and key.
Constructor with class and key.
Parameters:
pcClass - the class
param - the key
Since:
JDO 1.0
int compareTo(T arg0)
Parameters:
arg0 -
int compareTo(Object o)
Determine the ordering of identity objects.
Determine the ordering of identity objects.
Parameters:
o - Other identity
Returns:
The relative ordering between the objects
Since:
JDO 2.2
boolean equals(Object obj)
Determine if the other object represents the same object id.
Determine if the other object represents the same object id.
Parameters:
obj - the other object
Returns:
true if both objects represent the same object id
Since:
JDO 1.0
boolean equals(Object obj)
Check the class and class name and object type.
Check the class and class name and object type. If restored from serialization, class will be null so compare class name.
Parameters:
obj - the other object
Returns:
true if the class or class name is the same
Since:
JDO 1.0
Object getKey()
Return the key.
Return the key.
Returns:
the key
Since:
JDO 1.0
Return the key as an Object.
Return the key as an Object. The method is synchronized to avoid race conditions in multi-threaded environments.
Returns:
the key as an Object.
Since:
JDO 2.0
Return the target class.
Return the target class.
Returns:
the target class.
Since:
JDO 2.0
Return the target class name.
Return the target class name.
Returns:
the target class name.
Since:
JDO 2.0
int hashCode()
Return the cached hash code.
Return the cached hash code.
Returns:
the cached hash code.
Since:
JDO 1.0
void readExternal(ObjectInput in)throws IOException, ClassNotFoundException
Read this object.
Read this object. Read the superclass first.
Parameters:
in - the input
Since:
JDO 1.0
String toString()
Return the String form of the object id.
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
Since:
JDO 1.0
void writeExternal(ObjectOutput out)
Write this object.
Write this object. Write the superclass first.
Parameters:
out - the output
Since:
JDO 1.0
void readExternal(ObjectInput arg0)throws IOException, ClassNotFoundException
Parameters:
arg0 -
void writeExternal(ObjectOutput arg0)
Parameters:
arg0 -

This documentation page is derived (with some adjustments) from the JDO 2.2 API
and is available under the terms of the Apache License, v. 2.0.