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 Vladimir N. Molotkov, Stepan M. Mishura 20 * @version $Revision$ 21 */ 22 23 package org.apache.harmony.security.asn1; 24 25 26 /** 27 * This abstract class represents ASN.1 type that is a collection of ASN.1 types. 28 * 29 * @see <a href="http://asn1.elibel.tm.fr/en/standards/index.htm">ASN.1</a> 30 */ 31 32 public abstract class ASN1TypeCollection extends ASN1Constructured { 33 34 public final ASN1Type[] type; //TODO comment me 35 36 public final boolean[] OPTIONAL; //TODO comment me 37 38 public final Object[] DEFAULT; //TODO comment me 39 40 /** 41 * Constructs ASN.1 collection type. 42 * 43 * @param tagNumber - ASN.1 tag number 44 * @param type - a collection of one or more ASN.1 types. 45 * @throws IllegalArgumentException - if tagNumber is invalid 46 */ ASN1TypeCollection(int tagNumber, ASN1Type[] type)47 public ASN1TypeCollection(int tagNumber, ASN1Type[] type) { 48 super(tagNumber); 49 // FIXME what about empty sequence? 50 // if (type.length == 0) { 51 // throw new ASN1Exception("ASN1 collection type: " 52 // + getClass().getName() 53 // + " MUST have at least one component"); 54 // } 55 56 this.type = type; 57 this.OPTIONAL = new boolean[type.length]; 58 this.DEFAULT = new Object[type.length]; 59 } 60 61 /** 62 * Sets a collection component as optional 63 * 64 * @param index - an index of a component 65 */ setOptional(int index)66 protected final void setOptional(int index) { 67 OPTIONAL[index] = true; 68 } 69 70 /** 71 * Sets a default value for a collection component. 72 * The component also became an optional component. 73 * 74 * @param object - a component's default value 75 * @param index - an index of a component 76 */ setDefault(Object object, int index)77 protected final void setDefault(Object object, int index) { 78 OPTIONAL[index] = true; 79 DEFAULT[index] = object; 80 } 81 82 /** 83 * Provides an object's values to be encoded 84 * 85 * Derived classes should override this method to provide 86 * encoding for a selected class of objects. 87 * 88 * The default implementation throws RuntimeException. 89 * 90 * @param object - an object to be encoded 91 * @param values - an array to store an object's values to be encoded 92 */ getValues(Object object, Object[] values)93 protected void getValues(Object object, Object[] values) { 94 throw new RuntimeException("ASN.1 type is not designed to be encoded: " + getClass().getName()); 95 } 96 } 97