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 | |
| 7 | /** |
| 8 | * Geographical Location - describes the physical location of a host. |
| 9 | * |
| 10 | * @author Brian Wellington |
| 11 | */ |
| 12 | |
| 13 | public class GPOSRecord extends Record { |
| 14 | |
| 15 | private static final long serialVersionUID = -6349714958085750705L; |
| 16 | |
| 17 | private byte [] latitude, longitude, altitude; |
| 18 | |
| 19 | GPOSRecord() {} |
| 20 | |
| 21 | Record |
| 22 | getObject() { |
| 23 | return new GPOSRecord(); |
| 24 | } |
| 25 | |
| 26 | private void |
| 27 | validate(double longitude, double latitude) throws IllegalArgumentException |
| 28 | { |
| 29 | if (longitude < -90.0 || longitude > 90.0) { |
| 30 | throw new IllegalArgumentException("illegal longitude " + |
| 31 | longitude); |
| 32 | } |
| 33 | if (latitude < -180.0 || latitude > 180.0) { |
| 34 | throw new IllegalArgumentException("illegal latitude " + |
| 35 | latitude); |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * Creates an GPOS Record from the given data |
| 41 | * @param longitude The longitude component of the location. |
| 42 | * @param latitude The latitude component of the location. |
| 43 | * @param altitude The altitude component of the location (in meters above sea |
| 44 | * level). |
| 45 | */ |
| 46 | public |
| 47 | GPOSRecord(Name name, int dclass, long ttl, double longitude, double latitude, |
| 48 | double altitude) |
| 49 | { |
| 50 | super(name, Type.GPOS, dclass, ttl); |
| 51 | validate(longitude, latitude); |
| 52 | this.longitude = Double.toString(longitude).getBytes(); |
| 53 | this.latitude = Double.toString(latitude).getBytes(); |
| 54 | this.altitude = Double.toString(altitude).getBytes(); |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * Creates an GPOS Record from the given data |
| 59 | * @param longitude The longitude component of the location. |
| 60 | * @param latitude The latitude component of the location. |
| 61 | * @param altitude The altitude component of the location (in meters above sea |
| 62 | * level). |
| 63 | */ |
| 64 | public |
| 65 | GPOSRecord(Name name, int dclass, long ttl, String longitude, String latitude, |
| 66 | String altitude) |
| 67 | { |
| 68 | super(name, Type.GPOS, dclass, ttl); |
| 69 | try { |
| 70 | this.longitude = byteArrayFromString(longitude); |
| 71 | this.latitude = byteArrayFromString(latitude); |
| 72 | validate(getLongitude(), getLatitude()); |
| 73 | this.altitude = byteArrayFromString(altitude); |
| 74 | } |
| 75 | catch (TextParseException e) { |
| 76 | throw new IllegalArgumentException(e.getMessage()); |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | void |
| 81 | rrFromWire(DNSInput in) throws IOException { |
| 82 | longitude = in.readCountedString(); |
| 83 | latitude = in.readCountedString(); |
| 84 | altitude = in.readCountedString(); |
| 85 | try { |
| 86 | validate(getLongitude(), getLatitude()); |
| 87 | } |
| 88 | catch(IllegalArgumentException e) { |
| 89 | throw new WireParseException(e.getMessage()); |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | void |
| 94 | rdataFromString(Tokenizer st, Name origin) throws IOException { |
| 95 | try { |
| 96 | longitude = byteArrayFromString(st.getString()); |
| 97 | latitude = byteArrayFromString(st.getString()); |
| 98 | altitude = byteArrayFromString(st.getString()); |
| 99 | } |
| 100 | catch (TextParseException e) { |
| 101 | throw st.exception(e.getMessage()); |
| 102 | } |
| 103 | try { |
| 104 | validate(getLongitude(), getLatitude()); |
| 105 | } |
| 106 | catch(IllegalArgumentException e) { |
| 107 | throw new WireParseException(e.getMessage()); |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | /** Convert to a String */ |
| 112 | String |
| 113 | rrToString() { |
| 114 | StringBuffer sb = new StringBuffer(); |
| 115 | sb.append(byteArrayToString(longitude, true)); |
| 116 | sb.append(" "); |
| 117 | sb.append(byteArrayToString(latitude, true)); |
| 118 | sb.append(" "); |
| 119 | sb.append(byteArrayToString(altitude, true)); |
| 120 | return sb.toString(); |
| 121 | } |
| 122 | |
| 123 | /** Returns the longitude as a string */ |
| 124 | public String |
| 125 | getLongitudeString() { |
| 126 | return byteArrayToString(longitude, false); |
| 127 | } |
| 128 | |
| 129 | /** |
| 130 | * Returns the longitude as a double |
| 131 | * @throws NumberFormatException The string does not contain a valid numeric |
| 132 | * value. |
| 133 | */ |
| 134 | public double |
| 135 | getLongitude() { |
| 136 | return Double.parseDouble(getLongitudeString()); |
| 137 | } |
| 138 | |
| 139 | /** Returns the latitude as a string */ |
| 140 | public String |
| 141 | getLatitudeString() { |
| 142 | return byteArrayToString(latitude, false); |
| 143 | } |
| 144 | |
| 145 | /** |
| 146 | * Returns the latitude as a double |
| 147 | * @throws NumberFormatException The string does not contain a valid numeric |
| 148 | * value. |
| 149 | */ |
| 150 | public double |
| 151 | getLatitude() { |
| 152 | return Double.parseDouble(getLatitudeString()); |
| 153 | } |
| 154 | |
| 155 | /** Returns the altitude as a string */ |
| 156 | public String |
| 157 | getAltitudeString() { |
| 158 | return byteArrayToString(altitude, false); |
| 159 | } |
| 160 | |
| 161 | /** |
| 162 | * Returns the altitude as a double |
| 163 | * @throws NumberFormatException The string does not contain a valid numeric |
| 164 | * value. |
| 165 | */ |
| 166 | public double |
| 167 | getAltitude() { |
| 168 | return Double.parseDouble(getAltitudeString()); |
| 169 | } |
| 170 | |
| 171 | void |
| 172 | rrToWire(DNSOutput out, Compression c, boolean canonical) { |
| 173 | out.writeCountedString(longitude); |
| 174 | out.writeCountedString(latitude); |
| 175 | out.writeCountedString(altitude); |
| 176 | } |
| 177 | |
| 178 | } |