ipermission.java

这是一个基于角色的访问控制程序

/*
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights
 * reserved.
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 * Portions of this software are based upon public domain software
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 */
package gov.nist.security.rbac;
/**
 * Permission which represents a set of operations
 * that can be performed on a set of target objects.
 */
public interface IPermission {
  /** Permits all operations on all objects. */
  public static final IPermission ALL_PERMISSION =
      new Permission(IPermissionEntry.ALL_OPERATION, IPermissionEntry.ALL_OBJECT);
  /** Permits no operations on any object. */
  public static final IPermission NO_PERMISSION = new AbstractPermission();
  /** A null permission set. */
  public static final IPermission[] ZERO_PERMISSION = new IPermission[0];
  /** Returns the permission entry set of this permission. */
  public IPermissionEntry[] getPermissionEntries();
  /**
   * Returns true iff this permission is greater than or equal to
   * the given permission in terms of access privileges.
   */
  public boolean ge(IPermission p);
  /**
   * Returns the set of roles assigned to this permission.
   * For advanced permission-role review.
   */
  public IRole[] getAssignedRoles();
}