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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/security/acl/Owner.java
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+/* Owner.java -- ACL owner
+ Copyright (C) 1998 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+package java.security.acl;
+
+import java.security.Principal;
+
+/**
+ * This interface provides a mechanism for maintaining a list of owners
+ * of an access control list (ACL). Since a <code>Principal</code> must
+ * be an owner in order to modify the owner list, a mechanism must be
+ * provided to specify the initial owner of the ACL. The proper way to do
+ * this is for the implementing class to specify the initial owner in
+ * the contructor for that class.
+ *
+ * @version 0.0
+ *
+ * @author Aaron M. Renn (arenn@urbanophile.com)
+ */
+public interface Owner
+{
+ /**
+ * This method adds an owner to the access control list (ACL). Only a
+ * <code>Principal</code> who is already an owner can perform this operation.
+ *
+ * @param caller The <code>Principal</code> who is requesting that an owner be added
+ * @param owner The <code>Principal</code> to add as a new owner
+ *
+ * @param <code>true</code> if the new owner was successfully added or <code>false</code> if the specified new owner is already an owner
+ *
+ * @exception NotOwnerException If the caller is not already an owner of this ACL
+ */
+ boolean addOwner(Principal caller, Principal owner)
+ throws NotOwnerException;
+
+ /**
+ * This method delets an owner from the access control list (ACL). Only a
+ * <code>Principal</code> who is an owner can perform this operation. An
+ * owner can delete itself from the list. If there is only one
+ * owner remaining on this list, any attempt to delete it will throw an
+ * exception.
+ *
+ * @param caller The <code>Principal</code> who is requesting that an owner be deleted
+ * @param owner The <code>Principal</code> to delete as an owner
+ *
+ * @param <code>true</code> if the new owner was successfully deleted or <code>false</code> if the specified owner is not currently an owner
+ *
+ * @exception NotOwnerException If the caller is not already an owner of this ACL
+ * @exception LastOwnerException If completing the operation would delete the last ACL owner
+ */
+ boolean deleteOwner(Principal caller, Principal owner)
+ throws NotOwnerException, LastOwnerException;
+
+ /**
+ * This method tests whether or not a given <code>Principal</code> is an
+ * owner of this access control list (ACL).
+ *
+ * @return <code>true</code> if the <code>Principal</code> is an owner, <code>false</code> otherwise
+ */
+ boolean isOwner(Principal owner);
+}