1 files changed, 79 insertions, 0 deletions
diff --git a/libjava/java/security/acl/Group.java b/libjava/java/security/acl/Group.java
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+++ b/libjava/java/security/acl/Group.java
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+/* Group.java -- Represents a group of Principals
+   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., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+As a special exception, if you link this library with other files to
+produce an executable, this library does not by itself cause the
+resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why the
+executable file might be covered by the GNU General Public License. */
+
+package java.security.acl;
+
+import java.security.Principal;
+import java.util.Enumeration;
+
+/**
+ * This interface represents a group of <code>Principals</code>.  Note that
+ * since this interface extends <code>Principal</code>, a <code>Group</code>
+ * can be used where ever a <code>Principal</code> is requested.  This
+ * includes arguments to the methods in this interface.
+ *
+ * @version 0.0
+ *
+ * @author Aaron M. Renn (arenn@urbanophile.com)
+ */
+public interface Group
+{
+  /**
+   * This method adds a new <code>Principal</code> to this group.
+   *
+   * @param user The new <code>Principal</code> to add
+   *
+   * @return <code>true</code> if the user was successfully added or <code>false</code> if the user is already a member
+   */
+  public abstract boolean addMember(Principal user);
+
+  /**
+   * This method deletes a member from the group.
+   *
+   * @param user The <code>Principal</code> to delete
+   *
+   * @return <code>true</code> if the user was successfully deleted or <code>false</code> if the user is not a member of the group
+   */
+  public abstract boolean removeMember(Principal user);
+
+  /**
+   * This method tests whether or not a given <code>Principal</code> is a
+   * member of this group.
+   *
+   * @param user The <code>Principal</code> to test for membership
+   *
+   * @return <code>true</code> if the user is member, <code>false</code> otherwise
+   */
+  public abstract boolean isMember();
+
+  /**
+   * This method returns a list of all members of the group as an 
+   * <code>Enumeration</code>.
+   *
+   * @return The list of all members of the group
+   */
+  public abstract Enumeration members();
+}