com.sun.jini.mercury
Class ListenerProxy.ConstrainableListenerProxy

java.lang.Object
  extended by com.sun.jini.mercury.ListenerProxy
      extended by com.sun.jini.mercury.ListenerProxy.ConstrainableListenerProxy
All Implemented Interfaces:
Serializable, Remote, EventListener, RemoteMethodControl, RemoteEventListener, ReferentUuid
Enclosing class:
ListenerProxy

static final class ListenerProxy.ConstrainableListenerProxy
extends ListenerProxy
implements RemoteMethodControl

A subclass of ListenerProxy that implements RemoteMethodControl.


Nested Class Summary
 
Nested classes/interfaces inherited from class com.sun.jini.mercury.ListenerProxy
ListenerProxy.ConstrainableListenerProxy
 
Field Summary
private  MethodConstraints methodConstraints
          The client constraints placed on this proxy or null.
private static Method[] methodMap1
           
private static long serialVersionUID
           
 
Fields inherited from class com.sun.jini.mercury.ListenerProxy
registrationID, server
 
Constructor Summary
private ListenerProxy.ConstrainableListenerProxy(MailboxBackEnd server, Uuid id, MethodConstraints methodConstraints)
          Creates an instance of this class.
 
Method Summary
private static MailboxBackEnd constrainServer(MailboxBackEnd server, MethodConstraints methodConstraints)
          Returns a copy of the server proxy with the specified client constraints and methods mapping.
 MethodConstraints getConstraints()
          Returns the client constraints placed on this proxy.
private  ProxyTrustIterator getProxyTrustIterator()
          Returns a proxy trust iterator that is used in ProxyTrustVerifier to retrieve this object's trust verifier.
private  void readObject(ObjectInputStream s)
          Verifies that the registrationID and server fields are not null, that server implements RemoteMethodControl, and that the server proxy has the appropriate method constraints.
 RemoteMethodControl setConstraints(MethodConstraints constraints)
          Returns a new copy of this proxy with the client constraints set to the specified constraints.
 
Methods inherited from class com.sun.jini.mercury.ListenerProxy
create, equals, getReferentUuid, hashCode, notify
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

serialVersionUID

private static final long serialVersionUID
See Also:
Constant Field Values

methodMap1

private static final Method[] methodMap1

methodConstraints

private MethodConstraints methodConstraints
The client constraints placed on this proxy or null.

Constructor Detail

ListenerProxy.ConstrainableListenerProxy

private ListenerProxy.ConstrainableListenerProxy(MailboxBackEnd server,
                                                 Uuid id,
                                                 MethodConstraints methodConstraints)
Creates an instance of this class.

Method Detail

constrainServer

private static MailboxBackEnd constrainServer(MailboxBackEnd server,
                                              MethodConstraints methodConstraints)
Returns a copy of the server proxy with the specified client constraints and methods mapping.


setConstraints

public RemoteMethodControl setConstraints(MethodConstraints constraints)
Returns a new copy of this proxy with the client constraints set to the specified constraints. These constraints completely replace (in the copy) any client constraints previously placed on this proxy; calling the getConstraints method of the copy returns the identical constraints instance. The original proxy is not modified. A null value is interpreted as mapping all methods to empty constraints (one that has no requirements and no preferences). For any given remote call, the specific client requirements and preferences to be satisfied are given by the return value of invoking the getConstraints method of the specified MethodConstraints instance with a Method object representing the remote method.

Client constraints placed on a proxy are included in the serialized state of the proxy. This allows third-party services to be transparent to the client's needs. For example, if remote object s1 obtains a proxy for remote object s2, and passes that proxy to remote object s3, expecting s3 to invoke a remote method on s2, then s1 can control that call by placing its constraints directly on the proxy before passing it to s3. If s3 does not wish to be transparent in this way, then it should explicitly replace the client constraints on received proxies with whatever constraints are appropriate to implement its own policy.

Specified by:
setConstraints in interface RemoteMethodControl
Parameters:
constraints - client constraints, or null
Returns:
a new copy of this proxy with the client constraints set to the specified constraints
See Also:
RemoteMethodControl.getConstraints()

getConstraints

public MethodConstraints getConstraints()
Returns the client constraints placed on this proxy. The return value can be null, which is interpreted as mapping all methods to empty constraints (one that has no requirements and no preferences).

Specified by:
getConstraints in interface RemoteMethodControl
Returns:
the client constraints, or null
See Also:
RemoteMethodControl.setConstraints(net.jini.core.constraint.MethodConstraints)

getProxyTrustIterator

private ProxyTrustIterator getProxyTrustIterator()
Returns a proxy trust iterator that is used in ProxyTrustVerifier to retrieve this object's trust verifier.


readObject

private void readObject(ObjectInputStream s)
                 throws IOException,
                        ClassNotFoundException
Verifies that the registrationID and server fields are not null, that server implements RemoteMethodControl, and that the server proxy has the appropriate method constraints.

Throws:
InvalidObjectException - if registrationID or mailbox is null, if server does not implement RemoteMethodControl, or if server has the wrong constraints
IOException
ClassNotFoundException


Copyright 2007-2010, multiple authors.
Licensed under the Apache License, Version 2.0, see the NOTICE file for attributions.