Java™ Platform
Standard Ed. 6

java.rmi.server
Class RemoteObject

java.lang.Object
  extended by java.rmi.server.RemoteObject
All Implemented Interfaces:
Serializable, Remote
Direct Known Subclasses:
RemoteObjectInvocationHandler, RemoteServer, RemoteStub

public abstract class RemoteObject
extends Object
implements Remote, Serializable

The RemoteObject class implements the java.lang.Object behavior for remote objects. RemoteObject provides the remote semantics of Object by implementing methods for hashCode, equals, and toString.

Since:
JDK1.1
See Also:
Serialized Form

Field Summary
protected  RemoteRef ref
          The object's remote reference.
 
Constructor Summary
protected RemoteObject()
          Creates a remote object.
protected RemoteObject(RemoteRef newref)
          Creates a remote object, initialized with the specified remote reference.
 
Method Summary
 boolean equals(Object obj)
          Compares two remote objects for equality.
 RemoteRef getRef()
          Returns the remote reference for the remote object.
 int hashCode()
          Returns a hashcode for a remote object.
 String toString()
          Returns a String that represents the value of this remote object.
static Remote toStub(Remote obj)
          Returns the stub for the remote object obj passed as a parameter.
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
 

Field Detail

ref

protected transient RemoteRef ref
The object's remote reference.

Constructor Detail

RemoteObject

protected RemoteObject()
Creates a remote object.


RemoteObject

protected RemoteObject(RemoteRef newref)
Creates a remote object, initialized with the specified remote reference.

Parameters:
newref - remote reference
Method Detail

getRef

public RemoteRef getRef()
Returns the remote reference for the remote object.

Note: The object returned from this method may be an instance of an implementation-specific class. The RemoteObject class ensures serialization portability of its instances' remote references through the behavior of its custom writeObject and readObject methods. An instance of RemoteRef should not be serialized outside of its RemoteObject wrapper instance or the result may be unportable.

Returns:
remote reference for the remote object
Since:
1.2

toStub

public static Remote toStub(Remote obj)
                     throws NoSuchObjectException
Returns the stub for the remote object obj passed as a parameter. This operation is only valid after the object has been exported.

Parameters:
obj - the remote object whose stub is needed
Returns:
the stub for the remote object, obj.
Throws:
NoSuchObjectException - if the stub for the remote object could not be found.
Since:
1.2

hashCode

public int hashCode()
Returns a hashcode for a remote object. Two remote object stubs that refer to the same remote object will have the same hash code (in order to support remote objects as keys in hash tables).

Overrides:
hashCode in class Object
Returns:
a hash code value for this object.
See Also:
Hashtable

equals

public boolean equals(Object obj)
Compares two remote objects for equality. Returns a boolean that indicates whether this remote object is equivalent to the specified Object. This method is used when a remote object is stored in a hashtable. If the specified Object is not itself an instance of RemoteObject, then this method delegates by returning the result of invoking the equals method of its parameter with this remote object as the argument.

Overrides:
equals in class Object
Parameters:
obj - the Object to compare with
Returns:
true if these Objects are equal; false otherwise.
See Also:
Hashtable

toString

public String toString()
Returns a String that represents the value of this remote object.

Overrides:
toString in class Object
Returns:
a string representation of the object.

Java™ Platform
Standard Ed. 6

Submit a bug or feature
For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2008 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.


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