Shuyi Chen | d7955ce | 2013-05-22 14:51:55 -0700 | [diff] [blame] | 1 | // Copyright (c) 1999-2004 Brian Wellington (bwelling@xbill.org) |
| 2 | |
| 3 | package org.xbill.DNS; |
| 4 | |
| 5 | import java.io.*; |
| 6 | import java.util.*; |
| 7 | |
| 8 | /** |
| 9 | * Implements common functionality for the many record types whose format |
| 10 | * is a list of strings. |
| 11 | * |
| 12 | * @author Brian Wellington |
| 13 | */ |
| 14 | |
| 15 | abstract class TXTBase extends Record { |
| 16 | |
| 17 | private static final long serialVersionUID = -4319510507246305931L; |
| 18 | |
| 19 | protected List strings; |
| 20 | |
| 21 | protected |
| 22 | TXTBase() {} |
| 23 | |
| 24 | protected |
| 25 | TXTBase(Name name, int type, int dclass, long ttl) { |
| 26 | super(name, type, dclass, ttl); |
| 27 | } |
| 28 | |
| 29 | protected |
| 30 | TXTBase(Name name, int type, int dclass, long ttl, List strings) { |
| 31 | super(name, type, dclass, ttl); |
| 32 | if (strings == null) |
| 33 | throw new IllegalArgumentException("strings must not be null"); |
| 34 | this.strings = new ArrayList(strings.size()); |
| 35 | Iterator it = strings.iterator(); |
| 36 | try { |
| 37 | while (it.hasNext()) { |
| 38 | String s = (String) it.next(); |
| 39 | this.strings.add(byteArrayFromString(s)); |
| 40 | } |
| 41 | } |
| 42 | catch (TextParseException e) { |
| 43 | throw new IllegalArgumentException(e.getMessage()); |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | protected |
| 48 | TXTBase(Name name, int type, int dclass, long ttl, String string) { |
| 49 | this(name, type, dclass, ttl, Collections.singletonList(string)); |
| 50 | } |
| 51 | |
| 52 | void |
| 53 | rrFromWire(DNSInput in) throws IOException { |
| 54 | strings = new ArrayList(2); |
| 55 | while (in.remaining() > 0) { |
| 56 | byte [] b = in.readCountedString(); |
| 57 | strings.add(b); |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | void |
| 62 | rdataFromString(Tokenizer st, Name origin) throws IOException { |
| 63 | strings = new ArrayList(2); |
| 64 | while (true) { |
| 65 | Tokenizer.Token t = st.get(); |
| 66 | if (!t.isString()) |
| 67 | break; |
| 68 | try { |
| 69 | strings.add(byteArrayFromString(t.value)); |
| 70 | } |
| 71 | catch (TextParseException e) { |
| 72 | throw st.exception(e.getMessage()); |
| 73 | } |
| 74 | |
| 75 | } |
| 76 | st.unget(); |
| 77 | } |
| 78 | |
| 79 | /** converts to a String */ |
| 80 | String |
| 81 | rrToString() { |
| 82 | StringBuffer sb = new StringBuffer(); |
| 83 | Iterator it = strings.iterator(); |
| 84 | while (it.hasNext()) { |
| 85 | byte [] array = (byte []) it.next(); |
| 86 | sb.append(byteArrayToString(array, true)); |
| 87 | if (it.hasNext()) |
| 88 | sb.append(" "); |
| 89 | } |
| 90 | return sb.toString(); |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * Returns the text strings |
| 95 | * @return A list of Strings corresponding to the text strings. |
| 96 | */ |
| 97 | public List |
| 98 | getStrings() { |
| 99 | List list = new ArrayList(strings.size()); |
| 100 | for (int i = 0; i < strings.size(); i++) |
| 101 | list.add(byteArrayToString((byte []) strings.get(i), false)); |
| 102 | return list; |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Returns the text strings |
| 107 | * @return A list of byte arrays corresponding to the text strings. |
| 108 | */ |
| 109 | public List |
| 110 | getStringsAsByteArrays() { |
| 111 | return strings; |
| 112 | } |
| 113 | |
| 114 | void |
| 115 | rrToWire(DNSOutput out, Compression c, boolean canonical) { |
| 116 | Iterator it = strings.iterator(); |
| 117 | while (it.hasNext()) { |
| 118 | byte [] b = (byte []) it.next(); |
| 119 | out.writeCountedString(b); |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | } |