Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class ProtectionDomain - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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Java^TM 2 Platform
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java.security
Class ProtectionDomain

java.lang.Object
  |
  +--java.security.ProtectionDomain

public class ProtectionDomain
extends Object

This ProtectionDomain class encapulates the characteristics of a domain, which encloses a set of classes whose instances are granted the same set of permissions.

In addition to a set of permissions, a domain is comprised of a CodeSource, which is a set of PublicKeys together with a codebase (in the form of a URL). Thus, classes signed by the same keys and from the same URL are placed in the same domain. Classes that have the same permissions but are from different code sources belong to different domains.

A class belongs to one and only one ProtectionDomain.

Constructor Summary

ProtectionDomain(CodeSource codesource, PermissionCollection permissions)
          Creates a new ProtectionDomain with the given CodeSource and Permissions.

Method Summary

CodeSource getCodeSource()
          Returns the CodeSource of this domain.

PermissionCollection getPermissions()
          Returns the permissions of this domain.

boolean implies(Permission permission)
          Check and see if this ProtectionDomain implies the permissions expressed in the Permission object.

String toString()
          Convert a ProtectionDomain to a String.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ProtectionDomain

public ProtectionDomain(CodeSource codesource,
                        PermissionCollection permissions)

Creates a new ProtectionDomain with the given CodeSource and Permissions. If the permissions object is not null, then setReadOnly() will be called on the passed in Permissions object.

Parameters:: codesource - the codesource associated with this domain; permissions - the permissions granted to this domain

Method Detail

getCodeSource

public final CodeSource getCodeSource()

Returns the CodeSource of this domain.

Returns:: the CodeSource of this domain.

getPermissions

public final PermissionCollection getPermissions()

Returns the permissions of this domain.

Returns:: the permissions of this domain.

implies

public boolean implies(Permission permission)

Check and see if this ProtectionDomain implies the permissions expressed in the Permission object.

Parameters:: permission - the Permission object to check.
Returns:: true if "permission" is a proper subset of a permission in this ProtectionDomain, false if not.

toString

public String toString()

Convert a ProtectionDomain to a String.

Overrides:: toString in class Object

Tags copied from class: Object

Returns:: a string representation of the object.