Permission JDK 1.6)

Description

publicabstract abstract class Permission

Abstract class for representing access to a system resource.

See also: Permissions PermissionCollection

Methods

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public void checkGuard (Object object) throws SecurityException [Specified in Guard]

Implements the guard interface for a permission.

Implements the guard interface for a permission. The
SecurityManager.checkPermission method is called,
passing this permission object as the permission to check.
Returns silently if access is granted. Otherwise, throws
a SecurityException.
Parameters:
- object - the object being guarded (currently ignored).
Throws:
- SecurityException - if a security manager exists and its checkPermission method doesn't allow access.
See Also: Guard, GuardedObject, SecurityManager.checkPermission(java.security.Permission),

publicabstract boolean equals (Object obj)

Checks two Permission objects for equality.

publicabstract String getActions ()

Returns the actions as a String.

Returns the actions as a String. This is abstract
so subclasses can defer creating a String representation until
one is needed. Subclasses should always return actions in what they
consider to be their
canonical form. For example, two FilePermission objects created via
the following:


   perm1 = new FilePermission(p1,"read,write");
   perm2 = new FilePermission(p2,"write,read");

both return
"read,write" when the getActions method is invoked.
Returns: the actions of this Permission.

publicfinal String getName ()

Returns the name of this Permission.

Returns the name of this Permission.
For example, in the case of a java.io.FilePermission,
the name will be a pathname.
Returns: the name of this Permission.

publicabstract int hashCode ()

Returns the hash code value for this Permission object.

publicabstract boolean implies (Permission permission)

Checks if the specified permission's actions are "implied by" this object's actions.

public PermissionCollection newPermissionCollection ()

Returns an empty PermissionCollection for a given Permission object, or null if one is not defined.

Returns an empty PermissionCollection for a given Permission object, or null if
one is not defined. Subclasses of class Permission should
override this if they need to store their permissions in a particular
PermissionCollection object in order to provide the correct semantics
when the PermissionCollection.implies method is called.
If null is returned,
then the caller of this method is free to store permissions of this
type in any PermissionCollection they choose (one that uses a Hashtable,
one that uses a Vector, etc).
Returns: a new PermissionCollection object for this type of Permission, or null if one is not defined.

public String toString ()

Returns a string describing this Permission.