- java.lang.Object
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- java.rmi.server.RemoteObject
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- All Implemented Interfaces:
- Serializable, Remote
- Direct Known Subclasses:
- RemoteObjectInvocationHandler, RemoteServer, RemoteStub
public abstract class RemoteObject extends Object implements Remote, Serializable
TheRemoteObject
class implements thejava.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
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Field Summary
Fields Modifier and Type Field and Description protected RemoteRef
ref
The object's remote reference.
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Constructor Summary
Constructors Modifier Constructor and Description protected
RemoteObject()
Creates a remote object.protected
RemoteObject(RemoteRef newref)
Creates a remote object, initialized with the specified remote reference.
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Method Summary
Methods Modifier and Type Method and Description 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 objectobj
passed as a parameter.
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Field Detail
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ref
protected transient RemoteRef ref
The object's remote reference.
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Constructor Detail
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RemoteObject
protected RemoteObject()
Creates a remote object.
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RemoteObject
protected RemoteObject(RemoteRef newref)
Creates a remote object, initialized with the specified remote reference.- Parameters:
newref
- remote reference
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Method Detail
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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 customwriteObject
andreadObject
methods. An instance ofRemoteRef
should not be serialized outside of itsRemoteObject
wrapper instance or the result may be unportable.- Returns:
- remote reference for the remote object
- Since:
- 1.2
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toStub
public static Remote toStub(Remote obj) throws NoSuchObjectException
Returns the stub for the remote objectobj
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
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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).
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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 theequals
method of its parameter with this remote object as the argument.
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