/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.mahout.cf.taste.example.kddcup.track2;
import java.util.regex.Pattern;
import org.apache.mahout.cf.taste.impl.common.FastIDSet;
final class TrackData {
private static final Pattern PIPE = Pattern.compile("\\|");
private static final String NO_VALUE = "None";
static final long NO_VALUE_ID = Long.MIN_VALUE;
private static final FastIDSet NO_GENRES = new FastIDSet();
private final long trackID;
private final long albumID;
private final long artistID;
private final FastIDSet genreIDs;
TrackData(CharSequence line) {
String[] tokens = PIPE.split(line);
trackID = Long.parseLong(tokens[0]);
albumID = parse(tokens[1]);
artistID = parse(tokens[2]);
if (tokens.length > 3) {
genreIDs = new FastIDSet(tokens.length - 3);
for (int i = 3; i < tokens.length; i++) {
genreIDs.add(Long.parseLong(tokens[i]));
}
} else {
genreIDs = NO_GENRES;
}
}
private static long parse(String value) {
return NO_VALUE.equals(value) ? NO_VALUE_ID : Long.parseLong(value);
}
public long getTrackID() {
return trackID;
}
public long getAlbumID() {
return albumID;
}
public long getArtistID() {
return artistID;
}
public FastIDSet getGenreIDs() {
return genreIDs;
}
}