org.datanucleus.enhancer.spi

Class ObjectFieldPK

java.lang.Object

org.datanucleus.enhancer.spi.SingleFieldPK

org.datanucleus.enhancer.spi.ObjectFieldPK

All Implemented Interfaces:

Externalizable, Serializable, Comparable

public class ObjectFieldPK
extends SingleFieldPK

Single-Field identity with an Object field. Supports java.util.Date, java.util.Locale, java.util.Currency.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.datanucleus.enhancer.spi.SingleFieldPK

hashCode, keyAsObject

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
int	compareTo(Object o)
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 org.datanucleus.enhancer.spi.SingleFieldPK

assertKeyNotNull, createKeyAsObject, getKeyAsObject, getTargetClass, getTargetClassName, hashClassName, hashCode, setKeyAsObject

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectFieldPK

public ObjectFieldPK(Class pcClass,
             Object param)

Constructor with class and key.

Parameters:

pcClass - the class

param - the key

ObjectFieldPK

public ObjectFieldPK()

Constructor only for Externalizable.

Method Detail

getKey

public Object getKey()

Return the key.

Returns:

the key

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.

Overrides:

toString in class Object

Returns:

the String form of the key

equals

public boolean equals(Object obj)

Determine if the other object represents the same object id.

Overrides:

equals in class SingleFieldPK

Parameters:

obj - the other object

Returns:

true if both objects represent the same object id

compareTo

public int compareTo(Object o)

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Write this object. Write the superclass first.

Specified by:

writeExternal in interface Externalizable

Overrides:

writeExternal in class SingleFieldPK

Parameters:

out - the output

Throws:

IOException

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Read this object. Read the superclass first.

Specified by:

readExternal in interface Externalizable

Overrides:

readExternal in class SingleFieldPK

Parameters:

in - the input

Throws:

IOException

ClassNotFoundException