| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /** |
| * @author Alexander V. Esin |
| * @version $Revision$ |
| */ |
| |
| package org.apache.harmony.security.x501; |
| |
| import java.io.Serializable; |
| import java.util.Comparator; |
| import org.apache.harmony.security.utils.ObjectIdentifier; |
| |
| /** |
| * AttributeTypeAndValue comparator |
| * |
| */ |
| public class AttributeTypeAndValueComparator implements Comparator, Serializable { |
| |
| private static final long serialVersionUID = -1286471842007103132L; |
| |
| /** |
| * compares two AttributeTypeAndValues |
| * |
| * @param obj1 |
| * first AttributeTypeAndValue |
| * @param obj2 |
| * second AttributeTypeAndValue |
| * @return -1 of first AttributeTypeAndValue "less" than second |
| * AttributeTypeAndValue 1 otherwise, 0 if they are equal |
| */ |
| public int compare(Object obj1, Object obj2) { |
| if (obj1 == obj2) { |
| return 0; |
| } |
| |
| AttributeTypeAndValue atav1 = (AttributeTypeAndValue) obj1; |
| AttributeTypeAndValue atav2 = (AttributeTypeAndValue) obj2; |
| String kw1 = atav1.getType().getName(); |
| String kw2 = atav2.getType().getName(); |
| if (kw1 != null && kw2 == null) { |
| return -1; |
| } |
| if (kw1 == null && kw2 != null) { |
| return 1; |
| } |
| if (kw1 != null && kw2 != null) { |
| return kw1.compareTo(kw2); |
| } |
| |
| return compateOids(atav1.getType(), atav2.getType()); |
| } |
| |
| /** |
| * compares two Object identifiers |
| * |
| * @param oid1 |
| * first OID |
| * @param oid2 |
| * second OID |
| * @return -1 of first OID "less" than second OID 1 otherwise, 0 if they are |
| * equal |
| */ |
| private static int compateOids(ObjectIdentifier oid1, ObjectIdentifier oid2) { |
| if (oid1 == oid2) { |
| return 0; |
| } |
| |
| int[] ioid1 = oid1.getOid(); |
| int[] ioid2 = oid2.getOid(); |
| int min = ioid1.length < ioid2.length ? ioid1.length : ioid2.length; |
| for (int i = 0; i < min; ++i) { |
| if (ioid1[i] < ioid2[i]) { |
| return -1; |
| } |
| if (ioid1[i] > ioid2[i]) { |
| return 1; |
| } |
| if ((i + 1) == ioid1.length && (i + 1) < ioid2.length) { |
| return -1; |
| } |
| if ((i + 1) < ioid1.length && (i + 1) == ioid2.length) { |
| return 1; |
| } |
| } |
| return 0; |
| } |
| } |