org.datanucleus.identity
Class CharFieldPK

java.lang.Object
  extended by org.datanucleus.identity.SingleFieldPK
      extended by org.datanucleus.identity.CharFieldPK
All Implemented Interfaces:
java.io.Externalizable, java.io.Serializable, java.lang.Comparable

public class CharFieldPK
extends SingleFieldPK

Single-Field identity with a char/Character field.

See Also:
Serialized Form

Field Summary
 
Fields inherited from class org.datanucleus.identity.SingleFieldPK
hashCode, keyAsObject
 
Constructor Summary
CharFieldPK()
          Constructor only for Externalizable.
CharFieldPK(java.lang.Class pcClass, char key)
          Constructor with class and key.
CharFieldPK(java.lang.Class pcClass, java.lang.Character key)
          Constructor with class and key.
CharFieldPK(java.lang.Class pcClass, java.lang.String str)
          Constructor with class and key.
 
Method Summary
 int compareTo(java.lang.Object o)
           
protected  java.lang.Object createKeyAsObject()
          Create the key as an Object.
 boolean equals(java.lang.Object obj)
          Determine if the other object represents the same object id.
 char getKey()
          Return the key.
 void readExternal(java.io.ObjectInput in)
          Read this object.
 java.lang.String toString()
          Return the String form of the key.
 void writeExternal(java.io.ObjectOutput out)
          Write this object.
 
Methods inherited from class org.datanucleus.identity.SingleFieldPK
assertKeyNotNull, getKeyAsObject, getTargetClass, getTargetClassName, hashClassName, hashCode, setKeyAsObject
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
 

Constructor Detail

CharFieldPK

public CharFieldPK(java.lang.Class pcClass,
                   char key)
Constructor with class and key.

Parameters:
pcClass - the target class
key - the key

CharFieldPK

public CharFieldPK(java.lang.Class pcClass,
                   java.lang.Character key)
Constructor with class and key.

Parameters:
pcClass - the target class
key - the key

CharFieldPK

public CharFieldPK(java.lang.Class pcClass,
                   java.lang.String str)
Constructor with class and key. The String must have exactly one character.

Parameters:
pcClass - the target class
str - the key

CharFieldPK

public CharFieldPK()
Constructor only for Externalizable.

Method Detail

getKey

public char getKey()
Return the key.

Returns:
the key

toString

public java.lang.String toString()
Return the String form of the key.

Overrides:
toString in class java.lang.Object
Returns:
the String form of the key

equals

public boolean equals(java.lang.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(java.lang.Object o)

createKeyAsObject

protected java.lang.Object createKeyAsObject()
Create the key as an Object.

Overrides:
createKeyAsObject in class SingleFieldPK
Returns:
the key as an Object
Since:
2.0

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException
Write this object. Write the superclass first.

Specified by:
writeExternal in interface java.io.Externalizable
Overrides:
writeExternal in class SingleFieldPK
Parameters:
out - the output
Throws:
java.io.IOException

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException
Read this object. Read the superclass first.

Specified by:
readExternal in interface java.io.Externalizable
Overrides:
readExternal in class SingleFieldPK
Parameters:
in - the input
Throws:
java.io.IOException
java.lang.ClassNotFoundException


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