Class CharIdentity

java.lang.Object

javax.jdo.identity.SingleFieldIdentity

javax.jdo.identity.CharIdentity

All Implemented Interfaces:

Externalizable, Serializable, Comparable

public class CharIdentity
extends SingleFieldIdentity

This class is for identity with a single character field.

Version:

2.0

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private char	key	The key.
private static I18NHelper	msg	The Internationalization message helper.

Fields inherited from class SingleFieldIdentity

hashCode, keyAsObject

Constructor Summary

Constructors

Constructor	Description
CharIdentity()	Constructor only for Externalizable.
CharIdentity(Class pcClass, char key)	Constructor with class and key.
CharIdentity(Class pcClass, Character key)	Constructor with class and key.
CharIdentity(Class pcClass, String str)	Constructor with class and key.

Method Summary

Modifier and Type	Method	Description
int	compareTo(Object o)	Determine the ordering of identity objects.
private void	computeHashCode()
private void	construct(char key)
protected Object	createKeyAsObject()	Create the key as an Object.
boolean	equals(Object obj)	Determine if the other object represents the same object id.
char	getKey()	Return the key.
void	readExternal(ObjectInput in)	Read this object.
String	toString()	Return the String form of the key.
void	writeExternal(ObjectOutput out)	Write this object.

Methods inherited from class SingleFieldIdentity

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

Methods inherited from class Object

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

Field Details

msg

private static I18NHelper msg

The Internationalization message helper.

key

private char key

The key.

Constructor Details

CharIdentity

public CharIdentity(Class pcClass,
 char key)

Constructor with class and key.

Parameters:

pcClass - the target class

key - the key

CharIdentity

public CharIdentity(Class pcClass,
 Character key)

Constructor with class and key.

Parameters:

pcClass - the target class

key - the key

CharIdentity

public CharIdentity(Class pcClass,
 String str)

Constructor with class and key. The String must have exactly one character.

Parameters:

pcClass - the target class

str - the key

CharIdentity

public CharIdentity()

Constructor only for Externalizable.

Method Details

construct

private void construct(char key)

getKey

public char getKey()

Return the key.

Returns:

the key

toString

public String toString()

Return the String form of the key.

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 SingleFieldIdentity

Parameters:

obj - the other object

Returns:

true if both objects represent the same object id

compareTo

public int compareTo(Object o)

Determine the ordering of identity objects.

Parameters:

o - Other identity

Returns:

The relative ordering between the objects

Since:

2.2

createKeyAsObject

protected Object createKeyAsObject()

Create the key as an Object.

Overrides:

createKeyAsObject in class SingleFieldIdentity

Returns:

the key as an Object

Since:

2.0

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 SingleFieldIdentity

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 SingleFieldIdentity

Parameters:

in - the input

Throws:

IOException

ClassNotFoundException

computeHashCode

private void computeHashCode()