java.lang.Object | ||
↳ | java.rmi.server.RemoteObject | |
↳ | java.rmi.server.RemoteObjectInvocationHandler |
An implementation of the InvocationHandler
interface for
use with Java Remote Method Invocation (Java RMI). This invocation
handler can be used in conjunction with a dynamic proxy instance as a
replacement for a pregenerated stub class.
Applications are not expected to use this class directly. A remote
object exported to use a dynamic proxy with UnicastRemoteObject
or Activatable
has an instance of this class as that proxy's
invocation handler.
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Inherited Fields | |||||||||||
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From class
java.rmi.server.RemoteObject
|
Public Constructors | |||||||||||
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Creates a new
RemoteObjectInvocationHandler constructed
with the specified RemoteRef . |
Public Methods | |||||||||||
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Processes a method invocation made on the encapsulating
proxy instance,
proxy , and returns the result. |
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Inherited Methods | |||||||||||
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From class
java.rmi.server.RemoteObject
| |||||||||||
From class
java.lang.Object
| |||||||||||
From interface
java.lang.reflect.InvocationHandler
|
Creates a new RemoteObjectInvocationHandler
constructed
with the specified RemoteRef
.
ref | the remote ref |
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NullPointerException | if ref is null
|
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Processes a method invocation made on the encapsulating
proxy instance, proxy
, and returns the result.
RemoteObjectInvocationHandler
implements this method
as follows:
If method
is one of the following methods, it
is processed as described below:
Object.hashCode
: Returns the hash
code value for the proxy.
Object.equals
: Returns true
if the argument (args[0]
) is an instance of a dynamic
proxy class and this invocation handler is equal to the invocation
handler of that argument, and returns false
otherwise.
Object.toString
: Returns a string
representation of the proxy.
Otherwise, a remote call is made as follows:
proxy
is not an instance of the interface
Remote
, then an IllegalArgumentException
is thrown.
invoke
method is invoked
on this invocation handler's RemoteRef
, passing
proxy
, method
, args
, and the
method hash (defined in section 8.3 of the "Java Remote Method
Invocation (RMI) Specification") for method
, and the
result is returned.
RemoteRef.invoke
and
that exception is a checked exception that is not assignable to any
exception in the throws
clause of the method
implemented by the proxy
's class, then that exception
is wrapped in an UnexpectedException
and the wrapped
exception is thrown. Otherwise, the exception thrown by
invoke
is thrown by this method.
The semantics of this method are unspecified if the arguments could not have been produced by an instance of some valid dynamic proxy class containing this invocation handler.
proxy | the proxy instance that the method was invoked on |
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method | the Method instance corresponding to the
interface method invoked on the proxy instance |
args | an array of objects containing the values of the
arguments passed in the method invocation on the proxy instance, or
null if the method takes no arguments |
Throwable | the exception to throw from the method invocation on the proxy instance |
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