Permission

AI-generated Key Takeaways

• Permission is an abstract class implementing Guard and Serializable for security checks, but it's considered legacy and should not be used.

• Most direct and indirect subclasses of Permission are also legacy and not recommended for use in new code.

• LinkPermission is an exception and is used for link creation operations.

• The class provides methods to check access (checkGuard), get permission details (getActions, getName), and determine permission implications (implies).

• Despite being legacy, it forms the base for Java's security architecture and understanding its structure is useful for comprehending security concepts.

public abstract class Permission extends Object
implements Guard Serializable

Known Direct Subclasses AllPermission, BasicPermission, FilePermission, PrivateCredentialPermission, SocketPermission AllPermission Legacy security code; do not use.  BasicPermission Legacy security code; do not use.  FilePermission Legacy security code; do not use.  PrivateCredentialPermission Legacy security code; do not use.  SocketPermission Legacy security code; do not use.

Known Indirect Subclasses LinkPermission, LoggingPermission, NetPermission, PropertyPermission, ReflectPermission, RuntimePermission, SQLPermission, SecurityPermission, SerializablePermission LinkPermission The Permission class for link creation operations.  LoggingPermission Legacy security code; do not use.  NetPermission Legacy security code; do not use.  PropertyPermission Legacy security code; do not use.  ReflectPermission Legacy security code; do not use.  RuntimePermission Legacy security code; do not use.  SQLPermission Legacy security code; do not use.  SecurityPermission Legacy security code; do not use.  SerializablePermission This legacy security is not supported on Android.

Legacy security code; do not use.

Public Constructor Summary

Permission(String name)

Public Method Summary

void	checkGuard(Object object) Determines whether or not to allow access to the guarded object object.
abstract String	getActions()
final String	getName()
abstract boolean	implies(Permission permission)
PermissionCollection	newPermissionCollection()

Inherited Method Summary

From class java.lang.Object

Object	clone() Creates and returns a copy of this Object.
boolean	equals(Object obj) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of Class that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait(long timeout, int nanos) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait(long timeout) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait() Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.

From interface java.security.Guard

abstract void

checkGuard(Object object) Determines whether or not to allow access to the guarded object object.

Public Constructors

public Permission (String name)

Parameters

name

Public Methods

public void checkGuard (Object object)

Determines whether or not to allow access to the guarded object object. Returns silently if access is allowed. Otherwise, throws a SecurityException.

Parameters

object	the object being protected by the guard.

Throws

SecurityException

public abstract String getActions ()

public final String getName ()

public abstract boolean implies (Permission permission)

Parameters

permission

public PermissionCollection newPermissionCollection ()