| 1 | // $Id: PnfsId.java 14245 2010-07-20 09:36:48Z pmillar $ |
| 2 | |
| 3 | package diskCacheV111.util; |
| 4 | |
| 5 | import java.io.Serializable; |
| 6 | import java.util.Arrays; |
| 7 | import java.util.regex.Matcher; |
| 8 | import java.util.regex.Pattern; |
| 9 | |
| 10 | /** |
| 11 | * Immutable representation of a pnfsId |
| 12 | */ |
| 13 | public class PnfsId implements Serializable, Comparable<PnfsId> { |
| 14 | |
| 15 | private static final String SIMPLE_PNFS_ID_REGEX = "\\p{XDigit}{1,24}"; |
| 16 | // FIXME STAR_PNFS_ID_REGEX is too permissive; overall length should be 24 or less. |
| 17 | private static final String STAR_PNFS_ID_REGEX = "\\p{XDigit}{1,22}\\*\\p{XDigit}{1,22}"; |
| 18 | private static final String PNFS_ID_REGEX = "("+SIMPLE_PNFS_ID_REGEX+"|"+STAR_PNFS_ID_REGEX+")"; |
| 19 | private static final String PNFS_STRING_REGEX = "("+PNFS_ID_REGEX+"(\\..*)?)"; |
| 20 | private static final String CHIMERA_ID_REGEX = "\\p{XDigit}{36}"; |
| 21 | private static final String VALID_ID_REGEX = "^("+PNFS_STRING_REGEX+"|"+CHIMERA_ID_REGEX+")$"; |
| 22 | private static final Pattern VALID_ID_PATTERN = Pattern.compile( VALID_ID_REGEX); |
| 23 | |
| 24 | private final static int OLD_ID_SIZE = 12; // original pnfs |
| 25 | private final static int NEW_ID_SIZE = 18; // chimera |
| 26 | |
| 27 | private final byte[] _a; |
| 28 | @Deprecated |
| 29 | private final String _idString; |
| 30 | private final String _domain; |
| 31 | @Deprecated |
| 32 | private final String _toString; |
| 33 | |
| 34 | private static final long serialVersionUID = -112220393521303857L; |
| 35 | |
| 36 | public static boolean isValid( String id) { |
| 37 | Matcher m = VALID_ID_PATTERN.matcher( id); |
| 38 | return m.matches(); |
| 39 | } |
| 40 | |
| 41 | public PnfsId(String id, String domain) { |
| 42 | this(_stringToBytes(id), domain); |
| 43 | } |
| 44 | |
| 45 | public PnfsId(String s) { |
| 46 | this(stringToId(s), stringToDomain(s)); |
| 47 | } |
| 48 | |
| 49 | public PnfsId(byte[] id) { |
| 50 | this(id, null); |
| 51 | } |
| 52 | |
| 53 | public PnfsId(byte[] id, String domain) { |
| 54 | int length = id.length; |
| 55 | if (length != OLD_ID_SIZE && length != NEW_ID_SIZE) { |
| 56 | throw new IllegalArgumentException("Illegal pnfsid string length"); |
| 57 | } |
| 58 | _a = new byte[length]; |
| 59 | System.arraycopy(id, 0, _a, 0, length); |
| 60 | |
| 61 | _idString = bytesToHexString(_a); |
| 62 | if (domain != null) { |
| 63 | _domain = domain.intern(); |
| 64 | _toString = _idString + "." + _domain; |
| 65 | } else { |
| 66 | _domain = null; |
| 67 | _toString = _idString; |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | @Override |
| 72 | public boolean equals(Object o) { |
| 73 | if (this == o) { |
| 74 | return true; |
| 75 | } |
| 76 | |
| 77 | if (!(o instanceof PnfsId)) { |
| 78 | return false; |
| 79 | } |
| 80 | |
| 81 | PnfsId other = (PnfsId) o; |
| 82 | return Arrays.equals(_a, other._a) |
| 83 | && (_domain == other._domain |
| 84 | || (_domain != null && _domain.equals(other._domain))); |
| 85 | } |
| 86 | |
| 87 | @Override |
| 88 | public int hashCode() { |
| 89 | return Arrays.hashCode(_a) ^ ((_domain == null) ? 0 : _domain.hashCode()); |
| 90 | } |
| 91 | |
| 92 | public int compareTo(PnfsId pnfsId) { |
| 93 | if( pnfsId == this ) return 0; |
| 94 | |
| 95 | int i = 0; |
| 96 | for (i = 0; (i < _a.length) && (_a[i] == pnfsId._a[i]); i++) |
| 97 | ; |
| 98 | if (i == _a.length) |
| 99 | return 0; |
| 100 | int t = _a[i] < 0 ? 256 + _a[i] : _a[i]; |
| 101 | int o = pnfsId._a[i] < 0 ? 256 + pnfsId._a[i] : pnfsId._a[i]; |
| 102 | |
| 103 | return t < o ? -1 : 1; |
| 104 | } |
| 105 | |
| 106 | public int getDatabaseId() { |
| 107 | return (((_a[0]) & 0xFF) << 8) | ((_a[1]) & 0xFF); |
| 108 | } |
| 109 | |
| 110 | public String getDomain() { |
| 111 | return _domain; |
| 112 | } |
| 113 | |
| 114 | public String getId() { |
| 115 | return bytesToHexString(_a); |
| 116 | } |
| 117 | |
| 118 | @Override |
| 119 | public String toString() { |
| 120 | return getId() + ((_domain != null) ? "." + _domain : ""); |
| 121 | } |
| 122 | |
| 123 | public String toIdString() { |
| 124 | return getId(); |
| 125 | } |
| 126 | |
| 127 | public static String toCompleteId(String shortId) { |
| 128 | return bytesToHexString(_stringToBytes(shortId)); |
| 129 | } |
| 130 | |
| 131 | public byte[] getBytes() { |
| 132 | byte[] x = new byte[_a.length]; |
| 133 | System.arraycopy(_a, 0, x, 0, _a.length); |
| 134 | return x; |
| 135 | } |
| 136 | |
| 137 | public String toShortString() { |
| 138 | StringBuilder sb = new StringBuilder(); |
| 139 | int i = 0; |
| 140 | for (i = 0; i < 2; i++) |
| 141 | sb.append(byteToHexString(_a[i])); |
| 142 | for (; (i < _a.length) && (_a[i] == 0); i++) |
| 143 | ; |
| 144 | for (; i < _a.length; i++) |
| 145 | sb.append(byteToHexString(_a[i])); |
| 146 | return sb.toString(); |
| 147 | } |
| 148 | |
| 149 | private static final byte[] stringToId(String s) { |
| 150 | int i = s.indexOf('.'); |
| 151 | if (i < 0) { |
| 152 | return _stringToBytes(s); |
| 153 | } else { |
| 154 | return _stringToBytes(s.substring(0, i)); |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | private static final String stringToDomain(String s) { |
| 159 | int i = s.indexOf('.'); |
| 160 | if (i < 0 || i == s.length() - 1) { |
| 161 | return null; |
| 162 | } else { |
| 163 | return s.substring(i + 1); |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | private static String byteToHexString(byte b) { |
| 168 | String s = Integer.toHexString((b < 0) ? (256 + b) : (int) b) |
| 169 | .toUpperCase(); |
| 170 | if (s.length() == 1) |
| 171 | return "0" + s; |
| 172 | else |
| 173 | return s; |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * Translation table used by bytesToHexString. |
| 178 | */ |
| 179 | private static final char valueToHex[] = { |
| 180 | '0', '1', '2', '3', '4', '5', |
| 181 | '6', '7', '8', '9', 'A', 'B', |
| 182 | 'C', 'D', 'E', 'F' }; |
| 183 | |
| 184 | /** |
| 185 | * Converts a byte array into the string representation in base 16. |
| 186 | */ |
| 187 | private static String bytesToHexString(byte[] b) { |
| 188 | char result[] = new char[2 * b.length]; |
| 189 | for (int i = 0; i < b.length; i++) { |
| 190 | int value = (b[i] + 0x100) & 0xFF; |
| 191 | result[2 * i] = valueToHex[value >> 4]; |
| 192 | result[2 * i + 1] = valueToHex[value & 0x0F]; |
| 193 | } |
| 194 | return new String(result); |
| 195 | } |
| 196 | |
| 197 | private static byte[] _stringToBytes(String idString) { |
| 198 | |
| 199 | int len = idString.length(); |
| 200 | int idSize = 0; |
| 201 | |
| 202 | switch (len) { |
| 203 | case OLD_ID_SIZE * 2: // old pnfsid |
| 204 | idSize = OLD_ID_SIZE; |
| 205 | break; |
| 206 | case NEW_ID_SIZE * 2: // himera |
| 207 | idSize = NEW_ID_SIZE; |
| 208 | break; |
| 209 | default: |
| 210 | // all id's shorter than 24 characters will be extended to 24 |
| 211 | if ((len > OLD_ID_SIZE * 2) || (len == 0)) { |
| 212 | throw new IllegalArgumentException( |
| 213 | "Illegal pnfsid string length"); |
| 214 | } |
| 215 | idSize = OLD_ID_SIZE; |
| 216 | } |
| 217 | |
| 218 | byte[] a = new byte[idSize]; |
| 219 | int p = idString.indexOf('*'); |
| 220 | if (p > -1) { |
| 221 | if ((p == 0) || (p == (idString.length() - 1))) { |
| 222 | throw new IllegalArgumentException("Illegal use of *"); |
| 223 | } |
| 224 | int diff = 2 * OLD_ID_SIZE - idString.length() + 1; |
| 225 | StringBuilder sb = new StringBuilder(); |
| 226 | sb.append(idString.substring(0, p)); |
| 227 | for (int i = 0; i < diff; i++) |
| 228 | sb.append("0"); |
| 229 | sb.append(idString.substring(p + 1)); |
| 230 | idString = sb.toString(); |
| 231 | } |
| 232 | if (idString.length() > (2 * a.length)) { |
| 233 | throw new IllegalArgumentException("Illegal pnfsid string length"); |
| 234 | } else if (idString.length() < (2 * a.length)) { |
| 235 | StringBuilder sb = new StringBuilder(); |
| 236 | int m = 2 * OLD_ID_SIZE - idString.length(); |
| 237 | for (int i = 0; i < m; i++) |
| 238 | sb.append("0"); |
| 239 | sb.append(idString); |
| 240 | idString = sb.toString(); |
| 241 | } |
| 242 | for (int i = 0; i < idSize; i++) { |
| 243 | int l = Integer |
| 244 | .parseInt(idString.substring(2 * i, 2 * (i + 1)), 16); |
| 245 | a[i] = (byte) ((l < 128) ? l : (l - 256)); |
| 246 | } |
| 247 | return a; |
| 248 | } |
| 249 | |
| 250 | /** |
| 251 | * Converts string representation of pnfsid into its internal binary form |
| 252 | * |
| 253 | * @return pnfsid as byte array |
| 254 | */ |
| 255 | public byte[] toBinPnfsId() { |
| 256 | switch (_a.length) { |
| 257 | case OLD_ID_SIZE: // old pnfsid |
| 258 | return PnfsIdUtil.toBinPnfsId(getId()); |
| 259 | case NEW_ID_SIZE: // himera |
| 260 | return getBytes(); |
| 261 | default: |
| 262 | return null; |
| 263 | } |
| 264 | } |
| 265 | |
| 266 | public static void main(String[] args) { |
| 267 | if (args.length < 1) { |
| 268 | System.out.println("USAGE : ... <pnfsId>"); |
| 269 | System.exit(4); |
| 270 | } |
| 271 | try { |
| 272 | PnfsId id = new PnfsId(args[0]); |
| 273 | System.out.println("id.toString() " + id); |
| 274 | System.out.println("id.getId() " + id.getId()); |
| 275 | System.out.println("db.getDatabaseId() " + id.getDatabaseId()); |
| 276 | System.out.println("db.getDomain() " + id.getDomain()); |
| 277 | System.out.println("id.getBytes() " + java.util.Arrays.toString(id.getBytes())); |
| 278 | System.out.println("id.toBinPnfsId() " + java.util.Arrays.toString(id.toBinPnfsId())); |
| 279 | System.out.println("toStringPnfsId(id.toBinPnfsId()) " + PnfsIdUtil.toStringPnfsId(id.toBinPnfsId())); |
| 280 | System.exit(0); |
| 281 | } catch (Exception e) { |
| 282 | e.printStackTrace(); |
| 283 | System.exit(4); |
| 284 | } |
| 285 | } |
| 286 | } |