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package net.sf.flock.support;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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import net.sf.flock.FeedInfoI;
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import net.sf.flock.FlockResourceException;
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import net.sf.flock.MetaData;
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import net.sf.flock.SubscriptionInfoI;
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import org.apache.log4j.LogManager;
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import org.apache.log4j.Logger;
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import org.jdom.Document;
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import org.jdom.Element;
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/**
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* Imports subscriptions from an Radio/AmphetaDesk-style OPML.
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*
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* @version $Revision: 1.5 $
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* @author $Author: phraktle $
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*/
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public class OpmlSubscriptionImport {
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private final static Logger LOGGER = LogManager.getLogger( OpmlSubscriptionImport.class );
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private final static String[] KNOWN_ATTRIBUTES = { "path" };
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private final MetaData metaDataTemplate;
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public OpmlSubscriptionImport() {
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this(new MetaData());
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}
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public OpmlSubscriptionImport(MetaData metaDataTemplate) {
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this.metaDataTemplate = metaDataTemplate;
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}
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public boolean isSuitable(Document doc) {
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Element root = doc.getRootElement();
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if (!"opml".equals(root.getName())) {
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return false;
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}
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// @consider more opml checks
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return true;
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}
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/**
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* @return Collection of SubscriptionI
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*/
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public SubscriptionInfoI[] load(Document opml) throws FlockResourceException {
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Element body = opml.getRootElement().getChild("body");
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List subscriptions = new ArrayList();
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for (Iterator i = body.getChildren("outline").iterator(); i.hasNext(); ) {
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Element outline = (Element)i.next();
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final URL feedURL;
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try {
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String atr = outline.getAttributeValue("xmlUrl", outline.getAttributeValue("xmlurl"));
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feedURL = new URL( atr );
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} catch (MalformedURLException e) {
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throw new FlockResourceException(e);
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}
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final MetaData metaData = new MetaData( this.metaDataTemplate );
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for (int a=0; a<KNOWN_ATTRIBUTES.length; a++) {
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String value = outline.getAttributeValue( KNOWN_ATTRIBUTES[a] );
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if (value!=null) {
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metaData.set( KNOWN_ATTRIBUTES[a], value);
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}
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}
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final String title = outline.getAttributeValue("title", "New feed");
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String htmlUrl = outline.getAttributeValue("htmlurl", outline.getAttributeValue("htmlUrl"));
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URL siteURL = null;
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if (htmlUrl!=null) {
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try {
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siteURL = new URL(htmlUrl);
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} catch (MalformedURLException e) {
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LOGGER.warn("Invalid htmlUrl", e);
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}
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}
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final URL site = siteURL;
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subscriptions.add( new SubscriptionInfoI() {
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public URL getLocation() {
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return feedURL;
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}
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public MetaData getMetaData() {
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return metaData;
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}
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public FeedInfoI getFeedInfo() {
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return new FeedInfoI() {
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public String getTitle() {
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return title;
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}
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public URL getSite() {
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return site;
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}
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public SubscriptionInfoI getSubscriptionInfo() {
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return null;
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}
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};
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}
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} );
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}
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return (SubscriptionInfoI[])subscriptions.toArray(new SubscriptionInfoI[subscriptions.size()]);
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}
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}
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