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 and Description |
|---|
RemoteObjectInvocationHandler(RemoteRef ref)
Creates a new
RemoteObjectInvocationHandler constructed
with the specified RemoteRef. |
| Modifier and Type | Method and 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 nullpublic 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.
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 InvocationHandlerproxy - 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 Submit a bug or feature
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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