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/*
* 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.tika.parser.mp3;
import java.io.IOException;
import org.apache.tika.exception.TikaException;
import org.apache.tika.parser.mp3.ID3v2Frame.RawTag;
import org.apache.tika.parser.mp3.ID3v2Frame.RawTagIterator;
import org.xml.sax.SAXException;
/**
* This is used to parse ID3 Version 2.4 Tag information from an MP3 file,
* if available.
*
* @see MP3 ID3 Version 2.4 specification
* @see MP3 ID3 Version 2.4 frames/tags
*/
public class ID3v24Handler implements ID3Tags {
private String title;
private String artist;
private String album;
private String year;
private String composer;
private String comment;
private String genre;
private String trackNumber;
public ID3v24Handler(ID3v2Frame frame)
throws IOException, SAXException, TikaException {
RawTagIterator tags = new RawV24TagIterator(frame);
while (tags.hasNext()) {
RawTag tag = tags.next();
if (tag.name.equals("TIT2")) {
title = getTagString(tag.data, 0, tag.data.length);
} else if (tag.name.equals("TPE1")) {
artist = getTagString(tag.data, 0, tag.data.length);
} else if (tag.name.equals("TALB")) {
album = getTagString(tag.data, 0, tag.data.length);
} else if (tag.name.equals("TYER")) {
year = getTagString(tag.data, 0, tag.data.length);
} else if (tag.name.equals("TDRC")) {
if(year == null) {
year = getTagString(tag.data, 0, tag.data.length);
}
} else if (tag.name.equals("TCOM")) {
composer = getTagString(tag.data, 0, tag.data.length);
} else if (tag.name.equals("COMM")) {
comment = getTagString(tag.data, 0, tag.data.length);
} else if (tag.name.equals("TRCK")) {
trackNumber = getTagString(tag.data, 0, tag.data.length);
} else if (tag.name.equals("TCON")) {
String rawGenre = getTagString(tag.data, 0, tag.data.length);
int open = rawGenre.indexOf("(");
int close = rawGenre.indexOf(")");
if (open == -1 && close == -1) {
genre = rawGenre;
} else if (open < close) {
try {
int genreID = Integer.parseInt(rawGenre.substring(open+1, close));
genre = ID3Tags.GENRES[genreID];
} catch(NumberFormatException ignore) {
}
}
}
}
}
private String getTagString(byte[] data, int offset, int length) {
return ID3v2Frame.getTagString(data, offset, length);
}
public boolean getTagsPresent() {
return true;
}
public String getTitle() {
return title;
}
public String getArtist() {
return artist;
}
public String getAlbum() {
return album;
}
public String getYear() {
return year;
}
public String getComposer() {
return composer;
}
public String getComment() {
return comment;
}
public String getGenre() {
return genre;
}
public String getTrackNumber() {
return trackNumber;
}
private class RawV24TagIterator extends RawTagIterator {
private RawV24TagIterator(ID3v2Frame frame) {
frame.super(4, 4, 1, 2);
}
}
}
