Java tutorial
/* * Jajuk * Copyright (C) The Jajuk Team * http://jajuk.info * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * */ package org.jajuk.services.lyrics.providers; import ext.services.network.NetworkUtils; import java.net.MalformedURLException; import java.text.Normalizer; import java.util.regex.Pattern; import org.apache.commons.lang.StringUtils; import org.jajuk.util.Const; import org.jajuk.util.log.Log; /** * Lyrics Provider extracting lyrics from lyricsmania.com */ public class LyricsManiaWebLyricsProvider extends GenericWebLyricsProvider { /** URL pattern used by jajuk to retrieve lyrics. */ private static final String URL = "http://www.lyricsmania.com/%title_lyrics_%artist.html"; /** URL pattern to web page (see ILyricsProvider interface for details). */ private static final String WEB_URL = "http://www.lyricsmania.com/%title_lyrics_%artist.html"; /** * Instantiates a new lyricsmania web lyrics provider. */ public LyricsManiaWebLyricsProvider() { super(URL); } /** * {@inheritDoc} * * @see ext.services.lyrics.providers.GenericProvider#getLyrics(java.lang.String, * java.lang.String) */ @Override public String getLyrics(final String artist, final String title) { try { String lyrics = null; if (StringUtils.isNotBlank(artist) && StringUtils.isNotBlank(title)) { // Specific rule for artist : lowercase, no space, no accent String formattedArtist = removeAccent(artist).replace(" ", "_").toLowerCase(); // Specific rule for title : lowercas, no space with accent String formattedTitle = title.replace(" ", "_").replace("(", "").replace(")", ""); formattedTitle = formattedTitle.replace("'", "").toLowerCase(); String html = callProvider(formattedArtist, formattedTitle); String result = cleanLyrics(html); if (StringUtils.isNotBlank(result)) { lyrics = result; } else { // Another trial without accent on title formattedTitle = removeAccent(title).replaceAll(" ", "_").replace("(", ""); formattedTitle = formattedTitle.replace(")", "").replace("'", "").toLowerCase(); html = callProvider(formattedArtist, formattedTitle); if (StringUtils.isNotBlank(html)) { lyrics = cleanLyrics(html); } else { Log.debug("Empty return from callProvider()."); } } } return lyrics; } catch (Exception e) { Log.debug("Cannot fetch lyrics for: {{" + artist + "/" + title + "}}"); return null; } } /** * Extracts lyrics from the HTML page. The correct subsection is to be * extracted first, before being cleaned and stripped from useless HTML tags. * * @param html * * @return the lyrics */ private String cleanLyrics(final String html) { String ret = null; if (html != null) { String searchString = "<div class=\"lyrics-body\""; int startIndex = html.indexOf(searchString); if (startIndex > -1) { ret = html.substring(startIndex + searchString.length()); int secondIndex = ret.indexOf("</strong>"); if (secondIndex > -1) { ret = ret.substring(secondIndex + 10); int stopIndex = ret.indexOf("</div>"); ret = ret.substring(0, stopIndex); ret = ret.replace('\r', '\n'); ret = ret.replace("<div class=\"p402_premium\">", ""); ret += "\n<-- LyricsMania -->"; ret = cleanHtml(ret); } else { ret = null; } } } return ret; } /** * {@inheritDoc} * * @see org.jajuk.services.lyrics.providers.ILyricsProvider#getResponseEncoding() */ @Override public String getResponseEncoding() { return "UTF-8"; } /** * {@inheritDoc} * * @see org.jajuk.services.lyrics.providers.ILyricsProvider#getWebURL(java.lang .String, * java.lang.String) */ @Override public java.net.URL getWebURL(final String pArtist, final String pTitle) { String queryString = WEB_URL; // Replace spaces by _ String artist = removeAccent(pArtist).replaceAll(" ", "").toLowerCase(); String title = removeAccent(pTitle).replaceAll(" ", "").replace("(", "").replace(")", "").toLowerCase(); queryString = queryString.replace(Const.PATTERN_ARTIST, (artist != null) ? NetworkUtils.encodeString(artist) : ""); queryString = queryString.replace(Const.PATTERN_TRACKNAME, (title != null) ? NetworkUtils.encodeString(title) : ""); java.net.URL out = null; try { out = new java.net.URL(queryString); } catch (MalformedURLException e) { Log.error(e); } return out; } /** * {@inheritDoc} * * @see org.jajuk.services.lyrics.providers.ILyricsProvider#getLyrics() */ @Override public String getLyrics() { return getLyrics(audioFile.getTrack().getArtist().getName2(), audioFile.getTrack().getName()); } /** * Replace each accent in the string with the non accent character. * @param s the string to process * @return the string without accents */ public String removeAccent(String s) { String strTemp = Normalizer.normalize(s, Normalizer.Form.NFD); Pattern pattern = Pattern.compile("\\p{InCombiningDiacriticalMarks}+"); return pattern.matcher(strTemp).replaceAll(""); } }