    1   /* $Id: UUIDGenerator.java 4607 2006-09-07 20:23:51Z stack-sf $
    2    *
    3    * Created on July 27th, 2006
    4    *
    5    * Copyright (C) 2006 Internet Archive.
    6    *
    7    * This file is part of the Heritrix web crawler (crawler.archive.org).
    8    *
    9    * Heritrix is free software; you can redistribute it and/or modify
    10   * it under the terms of the GNU Lesser Public License as published by
    11   * the Free Software Foundation; either version 2.1 of the License, or
    12   * any later version.
    13   *
    14   * Heritrix is distributed in the hope that it will be useful,
    15   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    16   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    17   * GNU Lesser Public License for more details.
    18   *
    19   * You should have received a copy of the GNU Lesser Public License
    20   * along with Heritrix; if not, write to the Free Software
    21   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    22   */
    23  package org.archive.uid;
    24
    25  import java.net.URI;
    26  import java.net.URISyntaxException;
    27  import java.util.Map;
    28  import java.util.UUID;
    29
    30  /***
    31   * Generates <a href="http://en.wikipedia.org/wiki/UUID">UUID</a>s, using
    32   * {@link java.util.UUID java.util.UUID}, formatted as URNs from the UUID
    33   * namespace [See <a href="http://www.ietf.org/rfc/rfc4122.txt">RFC4122</a>].
    34   * Here is an examples of the type of ID it makes:
    35   * <code>urn:uuid:0161811f-5da6-4c6e-9808-a2fab97114cf</code>. Always makes a
    36   * new identifier even when passed qualifiers.
    37   *
    38   * @author stack
    39   * @version $Revision: 4607 $ $Date: 2006-09-07 20:23:51 +0000 (Thu, 07 Sep 2006) $
    40   * @see <a href="http://ietf.org/rfc/rfc4122.txt">RFC4122</a>
    41   */
    42  class UUIDGenerator implements Generator {
    43  	private static final String SCHEME = "urn:uuid";
    44  	private static final String SCHEME_COLON = SCHEME + ":";
    45
    46  	UUIDGenerator() {
    47  		super();
    48  	}
    49
    50  	public synchronized URI qualifyRecordID(URI recordId,
    51  			final Map<String, String> qualifiers)
    52  	throws URISyntaxException {
    53  		return getRecordID();
    54  	}
    55
    56  	private String getUUID() {
    57  		return UUID.randomUUID().toString();
    58  	}
    59
    60  	public URI getRecordID() throws URISyntaxException {
    61  		return new URI(SCHEME_COLON + getUUID());
    62  	}
    63
    64  	public URI getQualifiedRecordID(
    65  			final String key, final String value)
    66  	throws URISyntaxException {
    67  		return getRecordID();
    68  	}
    69
    70  	public URI getQualifiedRecordID(Map<String, String> qualifiers)
    71  	throws URISyntaxException {
    72  		return getRecordID();
    73  	}
    74  }