Serializable
, InvocationHandler
, Remote
public class RemoteObjectInvocationHandler extends RemoteObject implements InvocationHandler
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.
ref
Constructor | Description |
---|---|
RemoteObjectInvocationHandler(RemoteRef ref) |
Creates a new
RemoteObjectInvocationHandler constructed
with the specified RemoteRef . |
Modifier and Type | Method | Description |
---|---|---|
Object |
invoke(Object proxy,
Method method,
Object[] args) |
Processes a method invocation made on the encapsulating
proxy instance,
proxy , and returns the result. |
public RemoteObjectInvocationHandler(RemoteRef ref)
RemoteObjectInvocationHandler
constructed
with the specified RemoteRef
.ref
- the remote refNullPointerException
- if ref
is null
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable
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.
If method
overrides Object.finalize
,
it is ignored.
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.
invoke
in interface InvocationHandler
proxy
- the proxy instance that the method was invoked onmethod
- the Method
instance corresponding to the
interface method invoked on the proxy instanceargs
- 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 argumentsThrowable
- the exception to throw from the method invocation
on the proxy instanceUndeclaredThrowableException
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For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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DRAFT 9-internal+0-adhoc.mlchung.jdk9-jdeps