| /* |
| * Copyright (c) 1999, 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. |
| */ |
| |
| /** |
| * Supports checking an attribute set satisfies a filter |
| * that is specified as a set of "matching" attributes. |
| * Checking is done by determining whether the given attribute set |
| * is a superset of the matching ones. |
| * |
| * @author Rosanna Lee |
| */ |
| |
| package com.sun.jndi.toolkit.dir; |
| |
| import javax.naming.*; |
| import javax.naming.directory.*; |
| |
| public class ContainmentFilter implements AttrFilter { |
| private Attributes matchingAttrs; |
| |
| public ContainmentFilter(Attributes match) { |
| matchingAttrs = match; |
| } |
| |
| public boolean check(Attributes attrs) throws NamingException { |
| return matchingAttrs == null || |
| matchingAttrs.size() == 0 || |
| contains(attrs, matchingAttrs); |
| } |
| |
| // returns true if superset contains subset |
| public static boolean contains(Attributes superset, Attributes subset) |
| throws NamingException { |
| if (subset == null) |
| return true; // an empty set is always a subset |
| |
| NamingEnumeration<? extends Attribute> m = subset.getAll(); |
| while (m.hasMore()) { |
| if (superset == null) { |
| return false; // contains nothing |
| } |
| Attribute target = m.next(); |
| Attribute fromSuper = superset.get(target.getID()); |
| if (fromSuper == null) { |
| return false; |
| } else { |
| // check whether attribute values match |
| if (target.size() > 0) { |
| NamingEnumeration<?> vals = target.getAll(); |
| while (vals.hasMore()) { |
| if (!fromSuper.contains(vals.next())) { |
| return false; |
| } |
| } |
| } |
| } |
| } |
| return true; |
| } |
| |
| } |