diff -r eccafe6808d1 -r 5c6d4a7ebaff jdk/src/java.base/share/classes/sun/security/acl/GroupImpl.java --- a/jdk/src/java.base/share/classes/sun/security/acl/GroupImpl.java Thu Feb 26 20:17:21 2015 -0800 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,186 +0,0 @@ -/* - * Copyright (c) 1996, 2011, Oracle and/or its affiliates. All rights reserved. - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This code is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 only, as - * published by the Free Software Foundation. Oracle designates this - * particular file as subject to the "Classpath" exception as provided - * by Oracle in the LICENSE file that accompanied this code. - * - * This code 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 - * version 2 for more details (a copy is included in the LICENSE file that - * accompanied this code). - * - * You should have received a copy of the GNU General Public License version - * 2 along with this work; if not, write to the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. - * - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA - * or visit www.oracle.com if you need additional information or have any - * questions. - */ - -package sun.security.acl; - -import java.util.*; -import java.security.*; -import java.security.acl.*; - -/** - * This class implements a group of principals. - * @author Satish Dharmaraj - */ -public class GroupImpl implements Group { - private Vector groupMembers = new Vector<>(50, 100); - private String group; - - /** - * Constructs a Group object with no members. - * @param groupName the name of the group - */ - public GroupImpl(String groupName) { - this.group = groupName; - } - - /** - * adds the specified member to the group. - * @param user The principal to add to the group. - * @return true if the member was added - false if the - * member could not be added. - */ - public boolean addMember(Principal user) { - if (groupMembers.contains(user)) - return false; - - // do not allow groups to be added to itself. - if (group.equals(user.toString())) - throw new IllegalArgumentException(); - - groupMembers.addElement(user); - return true; - } - - /** - * removes the specified member from the group. - * @param user The principal to remove from the group. - * @param true if the principal was removed false if - * the principal was not a member - */ - public boolean removeMember(Principal user) { - return groupMembers.removeElement(user); - } - - /** - * returns the enumeration of the members in the group. - */ - public Enumeration members() { - return groupMembers.elements(); - } - - /** - * This function returns true if the group passed matches - * the group represented in this interface. - * @param another The group to compare this group to. - */ - public boolean equals(Object obj) { - if (this == obj) { - return true; - } - if (obj instanceof Group == false) { - return false; - } - Group another = (Group)obj; - return group.equals(another.toString()); - } - - // equals(Group) for compatibility - public boolean equals(Group another) { - return equals((Object)another); - } - - /** - * Prints a stringified version of the group. - */ - public String toString() { - return group; - } - - /** - * return a hashcode for the principal. - */ - public int hashCode() { - return group.hashCode(); - } - - /** - * returns true if the passed principal is a member of the group. - * @param member The principal whose membership must be checked for. - * @return true if the principal is a member of this group, - * false otherwise - */ - public boolean isMember(Principal member) { - - // - // if the member is part of the group (common case), return true. - // if not, recursively search depth first in the group looking for the - // principal. - // - if (groupMembers.contains(member)) { - return true; - } else { - Vector alreadySeen = new Vector<>(10); - return isMemberRecurse(member, alreadySeen); - } - } - - /** - * return the name of the principal. - */ - public String getName() { - return group; - } - - // - // This function is the recursive search of groups for this - // implementation of the Group. The search proceeds building up - // a vector of already seen groups. Only new groups are considered, - // thereby avoiding loops. - // - boolean isMemberRecurse(Principal member, Vector alreadySeen) { - Enumeration e = members(); - while (e.hasMoreElements()) { - boolean mem = false; - Principal p = (Principal) e.nextElement(); - - // if the member is in this collection, return true - if (p.equals(member)) { - return true; - } else if (p instanceof GroupImpl) { - // - // if not recurse if the group has not been checked already. - // Can call method in this package only if the object is an - // instance of this class. Otherwise call the method defined - // in the interface. (This can lead to a loop if a mixture of - // implementations form a loop, but we live with this improbable - // case rather than clutter the interface by forcing the - // implementation of this method.) - // - GroupImpl g = (GroupImpl) p; - alreadySeen.addElement(this); - if (!alreadySeen.contains(g)) - mem = g.isMemberRecurse(member, alreadySeen); - } else if (p instanceof Group) { - Group g = (Group) p; - if (!alreadySeen.contains(g)) - mem = g.isMember(member); - } - - if (mem) - return mem; - } - return false; - } -}