org.archive.uid.UUIDGenerator Maven / Gradle / Ivy
/*
* This file is part of the Heritrix web crawler (crawler.archive.org).
*
* Licensed to the Internet Archive (IA) by one or more individual
* contributors.
*
* The IA licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.archive.uid;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Map;
import java.util.UUID;
/**
* Generates UUIDs, using
* {@link java.util.UUID java.util.UUID}, formatted as URNs from the UUID
* namespace [See RFC4122].
* Here is an examples of the type of ID it makes:
* urn:uuid:0161811f-5da6-4c6e-9808-a2fab97114cf. Always makes a
* new identifier even when passed qualifiers.
*
* @author stack
* @version $Revision$ $Date$
* @see RFC4122
*/
public class UUIDGenerator implements RecordIDGenerator {
private static final String SCHEME = "urn:uuid";
private static final String SCHEME_COLON = SCHEME + ":";
public UUIDGenerator() {
super();
}
public URI qualifyRecordID(URI recordId,
final Map qualifiers) {
return getRecordID();
}
private String getUUID() {
return UUID.randomUUID().toString();
}
public URI getRecordID() {
try {
return new URI(SCHEME_COLON + getUUID());
} catch (URISyntaxException e) {
// should be impossible
throw new RuntimeException(e);
}
}
public URI getQualifiedRecordID(
final String key, final String value){
return getRecordID();
}
public URI getQualifiedRecordID(Map qualifiers){
return getRecordID();
}
}