Module java.rmi

Package java.rmi

Class MarshalledObject<T>

java.lang.Object

java.rmi.MarshalledObject<T>

Type Parameters:

T - the type of the object contained in this MarshalledObject

All Implemented Interfaces:

Serializable

public final class MarshalledObject<T>
extends Object
implements Serializable

A MarshalledObject contains a byte stream with the serialized representation of an object given to its constructor. The get method returns a new copy of the original object, as deserialized from the contained byte stream. The contained object is serialized and deserialized with the same serialization semantics used for marshaling and unmarshaling parameters and return values of RMI calls: When the serialized form is created:

• classes are annotated with a codebase URL from where the class can be loaded (if available), and
• any remote object in the MarshalledObject is represented by a serialized instance of its stub.

When copy of the object is retrieved (via the get method), if the class is not available locally, it will be loaded from the appropriate location (specified the URL annotated with the class descriptor when the class was serialized.

MarshalledObject facilitates passing objects in RMI calls that are not automatically deserialized immediately by the remote peer.

Since:

1.2

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
MarshalledObject(T obj)	Creates a new MarshalledObject that contains the serialized representation of the current state of the supplied object.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)	Compares this MarshalledObject to another object.
T	get()	Returns a new copy of the contained marshalledobject.
int	hashCode()	Return a hash code for this MarshalledObject.

Methods declared in class java.lang.Object

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

Constructor Details

MarshalledObject

public MarshalledObject(T obj)
                 throws IOException

Creates a new MarshalledObject that contains the serialized representation of the current state of the supplied object. The object is serialized with the semantics used for marshaling parameters for RMI calls.

Parameters:

obj - the object to be serialized (must be serializable)

Throws:

IOException - if an IOException occurs; an IOException may occur if obj is not serializable.

Since:

1.2

Method Details

get

public T get()
      throws IOException,
ClassNotFoundException

Returns a new copy of the contained marshalledobject. The internal representation is deserialized with the semantics used for unmarshaling parameters for RMI calls. If the MarshalledObject was read from an ObjectInputStream, the filter from that stream is used to deserialize the object.

Returns:

a copy of the contained object

Throws:

IOException - if an IOException occurs while deserializing the object from its internal representation.

ClassNotFoundException - if a ClassNotFoundException occurs while deserializing the object from its internal representation. could not be found

Since:

1.2

hashCode

public int hashCode()

Return a hash code for this MarshalledObject.

Overrides:

hashCode in class Object

Returns:

a hash code

See Also:

• Object.equals(java.lang.Object)
• System.identityHashCode(java.lang.Object)

equals

public boolean equals(Object obj)

Compares this MarshalledObject to another object. Returns true if and only if the argument refers to a MarshalledObject that contains exactly the same serialized representation of an object as this one does. The comparison ignores any class codebase annotation, meaning that two objects are equivalent if they have the same serialized representation except for the codebase of each class in the serialized representation.

Overrides:

equals in class Object

Parameters:

obj - the object to compare with this MarshalledObject

Returns:

true if the argument contains an equivalent serialized object; false otherwise

Since:

1.2

See Also:

• Object.hashCode()
• HashMap