org.datanucleus.identity
Class ObjectFieldPK

java.lang.Object
  extended by org.datanucleus.identity.SingleFieldPK
      extended by org.datanucleus.identity.ObjectFieldPK
All Implemented Interfaces:
java.io.Externalizable, java.io.Serializable, java.lang.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.identity.SingleFieldPK
hashCode, keyAsObject
 
Constructor Summary
ObjectFieldPK()
          Constructor only for Externalizable.
ObjectFieldPK(java.lang.Class pcClass, java.lang.Object param)
          Constructor with class and key.
 
Method Summary
 int compareTo(java.lang.Object o)
           
 boolean equals(java.lang.Object obj)
          Determine if the other object represents the same object id.
 java.lang.Object getKey()
          Return the key.
 void readExternal(java.io.ObjectInput in)
          Read this object.
 java.lang.String toString()
          Return the String form of the object id.
 void writeExternal(java.io.ObjectOutput out)
          Write this object.
 
Methods inherited from class org.datanucleus.identity.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(java.lang.Class pcClass,
                     java.lang.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 java.lang.Object getKey()
Return the key.

Returns:
the key

toString

public java.lang.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 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)

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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