Package org.jboss.marshalling

Class Pair.Externalizer

java.lang.Object

org.jboss.marshalling.Pair.Externalizer

All Implemented Interfaces:

Externalizable, Serializable, Externalizer

Enclosing class:

Pair<A,B>

public static final class Pair.Externalizer
extends Object
implements Externalizer, Externalizable

An externalizer for Pair instances.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
Externalizer()

Method Summary

Modifier and Type	Method	Description
Object	createExternal(Class<?> subjectType, ObjectInput input)	Create an instance of a type.
static Pair.Externalizer	getInstance()	Get the single instance.
void	readExternal(ObjectInput in)
protected Object	readResolve()	Resolve the object to the single externalizer instance.
void	writeExternal(ObjectOutput out)
void	writeExternal(Object subject, ObjectOutput output)	Write the external representation of an object.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Externalizer

public Externalizer()

Method Detail

getInstance

public static Pair.Externalizer getInstance()

Get the single instance. Though multiple instances can be created using the public constructor, only a single instance need be used in practice since this class maintains no internal state.

Returns:

the instance

writeExternal

public void writeExternal(Object subject,
                          ObjectOutput output)
                   throws IOException

Write the external representation of an object. The object's class and the externalizer's class will already have been written.

Specified by:

writeExternal in interface Externalizer

Parameters:

subject - the object to externalize

output - the output

Throws:

IOException - if an error occurs

createExternal

public Object createExternal(Class<?> subjectType,
                             ObjectInput input)
                      throws IOException,
                             ClassNotFoundException

Create an instance of a type. The object may then be initialized from input, or that may be deferred to the readExternal() method. Instances may simply delegate the task to the given Creator. Note that this method is called only on the leaf class, so externalizers for non-final classes that initialize the instance from the stream need to be aware of this.

Specified by:

createExternal in interface Externalizer

Parameters:

subjectType - the type of object to create

input - the input

Returns:

the new instance

Throws:

IOException - if an error occurs

ClassNotFoundException - if a class could not be found during read

writeExternal

public void writeExternal(ObjectOutput out)

Specified by:

writeExternal in interface Externalizable

readExternal

public void readExternal(ObjectInput in)

Specified by:

readExternal in interface Externalizable

readResolve

protected Object readResolve()

Resolve the object to the single externalizer instance.

Returns:

the instance