Java tutorial
/* * ITunesParser.java * * Created on August 1, 2005, 8:29 PM * * This library is provided under dual licenses. * You may choose the terms of the Lesser General Public License or the Apache * License at your discretion. * * Copyright (C) 2005 Robert Cooper, Temple of the Screaming Penguin * * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * * Licensed 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.rometools.feed.module.itunes.io; import org.rometools.feed.module.itunes.AbstractITunesObject; import org.rometools.feed.module.itunes.EntryInformationImpl; import org.rometools.feed.module.itunes.FeedInformationImpl; import com.sun.syndication.io.ModuleParser; import org.rometools.feed.module.itunes.types.Category; import org.rometools.feed.module.itunes.types.Duration; import org.rometools.feed.module.itunes.types.Subcategory; import com.sun.syndication.io.WireFeedParser; import org.jdom2.Element; import org.jdom2.Namespace; import org.jdom2.output.XMLOutputter; import java.net.MalformedURLException; import java.net.URL; import java.util.Iterator; import java.util.List; import java.util.StringTokenizer; import java.util.logging.Logger; /** * @version $Revision: 1.10 $ * @author <a href="mailto:cooper@screaming-penguin.com">Robert "kebernet" Cooper</a> */ public class ITunesParser implements ModuleParser { static Logger log = Logger.getLogger(ITunesParser.class.getName()); Namespace ns = Namespace.getNamespace(AbstractITunesObject.URI); /** Creates a new instance of ITunesParser */ public ITunesParser() { } public void setParser(WireFeedParser feedParser) { } public String getNamespaceUri() { return AbstractITunesObject.URI; } public com.sun.syndication.feed.module.Module parse(org.jdom2.Element element) { AbstractITunesObject module = null; if (element.getName().equals("channel")) { FeedInformationImpl feedInfo = new FeedInformationImpl(); module = feedInfo; //Now I am going to get the channel specific tags Element owner = element.getChild("owner", ns); if (owner != null) { Element name = owner.getChild("name", ns); if (name != null) { feedInfo.setOwnerName(name.getValue().trim()); } Element email = owner.getChild("email", ns); if (email != null) { feedInfo.setOwnerEmailAddress(email.getValue().trim()); } } Element image = element.getChild("image", ns); if ((image != null) && (image.getAttributeValue("href") != null)) { try { URL imageURL = new URL(image.getAttributeValue("href").trim()); feedInfo.setImage(imageURL); } catch (MalformedURLException e) { log.finer( "Malformed URL Exception reading itunes:image tag: " + image.getAttributeValue("href")); } } List categories = element.getChildren("category", ns); for (Iterator it = categories.iterator(); it.hasNext();) { Element category = (Element) it.next(); if ((category != null) && (category.getAttribute("text") != null)) { Category cat = new Category(); cat.setName(category.getAttribute("text").getValue().trim()); Element subcategory = category.getChild("category", ns); if (subcategory != null && subcategory.getAttribute("text") != null) { Subcategory subcat = new Subcategory(); subcat.setName(subcategory.getAttribute("text").getValue().trim()); cat.setSubcategory(subcat); } feedInfo.getCategories().add(cat); } } } else if (element.getName().equals("item")) { EntryInformationImpl entryInfo = new EntryInformationImpl(); module = entryInfo; //Now I am going to get the item specific tags Element duration = element.getChild("duration", ns); if (duration != null && duration.getValue() != null) { Duration dur = new Duration(duration.getValue().trim()); entryInfo.setDuration(dur); } } if (module != null) { //All these are common to both Channel and Item Element author = element.getChild("author", ns); if (author != null && author.getText() != null) { module.setAuthor(author.getText()); } Element block = element.getChild("block", ns); if (block != null) { module.setBlock(true); } Element explicit = element.getChild("explicit", ns); if ((explicit != null) && explicit.getValue() != null && explicit.getValue().trim().equalsIgnoreCase("yes")) { module.setExplicit(true); } Element keywords = element.getChild("keywords", ns); if (keywords != null) { StringTokenizer tok = new StringTokenizer(getXmlInnerText(keywords).trim(), ","); String[] keywordsArray = new String[tok.countTokens()]; for (int i = 0; tok.hasMoreTokens(); i++) { keywordsArray[i] = tok.nextToken(); } module.setKeywords(keywordsArray); } Element subtitle = element.getChild("subtitle", ns); if (subtitle != null) { module.setSubtitle(subtitle.getTextTrim()); } Element summary = element.getChild("summary", ns); if (summary != null) { module.setSummary(summary.getTextTrim()); } } return module; } protected String getXmlInnerText(Element e) { StringBuffer sb = new StringBuffer(); XMLOutputter xo = new XMLOutputter(); List children = e.getContent(); sb.append(xo.outputString(children)); return sb.toString(); } }