GigaSpaces XAP 8.0 API

Class DownloadPermission

  extended by
      extended by
          extended by net.jini.loader.DownloadPermission
All Implemented Interfaces:
Serializable, Guard

public final class DownloadPermission
extends BasicPermission

Permission that must be granted to the CodeSource of a downloaded class in order for the class to be defined using RMIClassLoader.

A DownloadPermission contains a name (also referred to as a "target name") but no action list; you either have the named permission or you don't. The only defined target name is "permit", which allows a downloaded class with a CodeSource that is granted the permission to be defined by a class loader created by RMIClassLoader.

Selective granting of this permission can be used to restrict the CodeSource values (codebase URLs and signers) from which downloaded classes can be defined using RMIClassLoader.

Note that this permission is only enforced if the current RMIClassLoader provider supports it; not all RMIClassLoader providers support this permission. In particular, the default provider (see RMIClassLoader.getDefaultProviderInstance) does not support this permission, and so when the default provider is used, downloaded classes do not need to be granted DownloadPermission in order to be defined using RMIClassLoader. PreferredClassProvider itself does not enforce this permission, but subclasses may configure it to do so (see RequireDlPermProvider).

Sun Microsystems, Inc.
See Also:
Serialized Form

Constructor Summary
          Creates a new DownloadPermission with the name "permit".
Method Summary
Methods inherited from class
equals, getActions, hashCode, implies, newPermissionCollection
Methods inherited from class
checkGuard, getName, toString
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail


public DownloadPermission()
Creates a new DownloadPermission with the name "permit".

GigaSpaces XAP 8.0 API

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