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| 1 | /* | ||
| 2 | * Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | /** | ||
| 27 | * Supports checking an attribute set satisfies a filter | ||
| 28 | * that is specified as a set of "matching" attributes. | ||
| 29 | * Checking is done by determining whether the given attribute set | ||
| 30 | * is a superset of the matching ones. | ||
| 31 | * | ||
| 32 | * @author Rosanna Lee | ||
| 33 | */ | ||
| 34 | |||
| 35 | package com.sun.jndi.toolkit.dir; | ||
| 36 | |||
| 37 | import javax.naming.*; | ||
| 38 | import javax.naming.directory.*; | ||
| 39 | |||
| 40 | public class ContainmentFilter implements AttrFilter { | ||
| 41 | private Attributes matchingAttrs; | ||
| 42 | |||
| 43 | public ContainmentFilter(Attributes match) { | ||
| 44 | matchingAttrs = match; | ||
| 45 | } | ||
| 46 | |||
| 47 | public boolean check(Attributes attrs) throws NamingException { | ||
| 48 | return matchingAttrs == null || | ||
| 49 | matchingAttrs.size() == 0 || | ||
| 50 | contains(attrs, matchingAttrs); | ||
| 51 | } | ||
| 52 | |||
| 53 | // returns true if superset contains subset | ||
| 54 | public static boolean contains(Attributes superset, Attributes subset) | ||
| 55 | throws NamingException { | ||
| 56 | if (subset == null) | ||
| 57 | return true; // an empty set is always a subset | ||
| 58 | |||
| 59 | NamingEnumeration m = subset.getAll(); | ||
| 60 | while (m.hasMore()) { | ||
| 61 | if (superset == null) { | ||
| 62 | return false; // contains nothing | ||
| 63 | } | ||
| 64 | Attribute target = (Attribute) m.next(); | ||
| 65 | Attribute fromSuper = superset.get(target.getID()); | ||
| 66 | if (fromSuper == null) { | ||
| 67 | return false; | ||
| 68 | } else { | ||
| 69 | // check whether attribute values match | ||
| 70 | if (target.size() > 0) { | ||
| 71 | NamingEnumeration vals = target.getAll(); | ||
| 72 | while (vals.hasMore()) { | ||
| 73 | if (!fromSuper.contains(vals.next())) { | ||
| 74 | return false; | ||
| 75 | } | ||
| 76 | } | ||
| 77 | } | ||
| 78 | } | ||
| 79 | } | ||
| 80 | return true; | ||
| 81 | } | ||
| 82 | |||
| 83 | } | ||