1/* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18/** 19* @author Alexander Y. Kleymenov 20* @version $Revision$ 21*/ 22 23package org.apache.harmony.security.x509; 24 25import java.util.ArrayList; 26import java.util.Collection; 27import java.util.List; 28import org.apache.harmony.security.asn1.ASN1SequenceOf; 29import org.apache.harmony.security.asn1.ASN1Type; 30import org.apache.harmony.security.asn1.BerInputStream; 31 32/** 33 * The class encapsulates the ASN.1 DER encoding/decoding work 34 * with the GeneralSubtrees structure which is a part of X.509 certificate: 35 * (as specified in RFC 3280 - 36 * Internet X.509 Public Key Infrastructure. 37 * Certificate and Certificate Revocation List (CRL) Profile. 38 * http://www.ietf.org/rfc/rfc3280.txt): 39 * 40 * <pre> 41 * GeneralSubtrees ::= SEQUENCE SIZE (1..MAX) OF GeneralSubtree 42 * </pre> 43 * 44 * @see org.apache.harmony.security.x509.NameConstraints 45 * @see org.apache.harmony.security.x509.GeneralSubtree 46 */ 47public final class GeneralSubtrees { 48 /** the list of values of GeneralSubtrees */ 49 private List<GeneralSubtree> generalSubtrees; 50 /** the ASN.1 encoded form of GeneralSubtrees */ 51 private byte[] encoding; 52 53 public GeneralSubtrees(List<GeneralSubtree> generalSubtrees) { 54 // TODO: the size should not be less than one 55 this.generalSubtrees = generalSubtrees; 56 } 57 58 /** 59 * Returns the list of values of subtrees. 60 */ 61 public List<GeneralSubtree> getSubtrees() { 62 return generalSubtrees; 63 } 64 65 /** 66 * Returns ASN.1 encoded form of this X.509 AlgorithmIdentifier value. 67 */ 68 public byte[] getEncoded() { 69 if (encoding == null) { 70 encoding = ASN1.encode(this); 71 } 72 return encoding; 73 } 74 75 /** 76 * ASN.1 DER X.509 GeneralSubtrees encoder/decoder class. 77 */ 78 public static final ASN1Type ASN1 = new ASN1SequenceOf(GeneralSubtree.ASN1) { 79 @Override public Object getDecodedObject(BerInputStream in) { 80 return new GeneralSubtrees((List<GeneralSubtree>) in.content); 81 } 82 83 @Override public Collection getValues(Object object) { 84 GeneralSubtrees gss = (GeneralSubtrees) object; 85 return (gss.generalSubtrees == null) 86 ? new ArrayList<GeneralSubtree>() 87 : gss.generalSubtrees; 88 } 89 }; 90} 91 92