Class RemoteObject
- java.lang.Object
-
- 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:
- 1.1
- See Also:
- Serialized Form
Field Summary
Modifier and Type | Field | Description |
---|---|---|
protected RemoteRef | ref | The object's remote reference. |
Constructor Summary
Modifier | Constructor | Description |
---|---|---|
protected | RemoteObject() | Creates a remote object. |
protected | RemoteObject(RemoteRef newref) | Creates a remote object, initialized with the specified remote reference. |
Method Summary
Modifier and Type | Method | 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 object |
Methods declared in 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).
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 classObject
- 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.