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package de.podfetcher.feed;
import java.util.ArrayList;
import de.podfetcher.feed.FeedHandler;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
/**
* SAX-Parser for reading RSS-Feeds
*
* @author daniel
*
*/
public class RSSHandler extends DefaultHandler {
public ArrayList<FeedItem> items;
public FeedItem currentItem;
public StringBuilder strBuilder;
public Feed feed;
public String active_root_element; // channel or item or image
public String active_sub_element; // Not channel or item
public RSSHandler(Feed f) {
super();
this.feed = f;
}
@Override
public void characters(char[] ch, int start, int length)
throws SAXException {
if (active_sub_element != null) {
strBuilder.append(ch, start, length);
}
}
@Override
public void endDocument() throws SAXException {
feed.setItems(items);
}
@Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
if (qName.equalsIgnoreCase(FeedHandler.ITEM)) {
currentItem.setFeed(feed);
items.add(currentItem);
} else if (qName.equalsIgnoreCase(FeedHandler.TITLE)) {
if (active_root_element.equalsIgnoreCase(FeedHandler.CHANNEL)) {
feed.setTitle(strBuilder.toString());
} else if(active_root_element.equalsIgnoreCase(FeedHandler.ITEM)) {
currentItem.setTitle(strBuilder.toString());
} else if(active_root_element.equalsIgnoreCase(FeedHandler.IMAGE)) {
feed.getImage().title = strBuilder.toString();
}
} else if (qName.equalsIgnoreCase(FeedHandler.DESCR)) {
if (active_root_element.equalsIgnoreCase(FeedHandler.CHANNEL)) {
feed.setDescription(strBuilder.toString());
} else {
currentItem.setDescription(strBuilder.toString());
}
} else if (qName.equalsIgnoreCase(FeedHandler.LINK)) {
if (active_root_element.equalsIgnoreCase(FeedHandler.CHANNEL)) {
feed.setLink(strBuilder.toString());
} else if(active_root_element.equalsIgnoreCase(FeedHandler.ITEM)){
currentItem.setLink(strBuilder.toString());
}
} else if (qName.equalsIgnoreCase(FeedHandler.PUBDATE)) {
if (active_root_element.equalsIgnoreCase(FeedHandler.ITEM)) {
currentItem.setPubDate(strBuilder.toString());
}
} else if (qName.equalsIgnoreCase(FeedHandler.URL)) {
if(active_root_element.equalsIgnoreCase(FeedHandler.IMAGE)) {
feed.getImage().download_url = strBuilder.toString();
}
} else if(qName.equalsIgnoreCase(FeedHandler.IMAGE)) {
active_root_element = FeedHandler.CHANNEL;
}
active_sub_element = null;
strBuilder = new StringBuilder();
}
@Override
public void startDocument() throws SAXException {
items = new ArrayList<FeedItem>();
strBuilder = new StringBuilder();
}
@Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
if (qName.equalsIgnoreCase(FeedHandler.CHANNEL)) {
if(feed == null) {
feed = new Feed();
}
active_root_element = qName;
} else if (qName.equalsIgnoreCase(FeedHandler.ITEM)) {
currentItem = new FeedItem();
active_root_element = qName;
} else if (qName.equalsIgnoreCase(FeedHandler.TITLE)) {
active_sub_element = qName;
} else if (qName.equalsIgnoreCase(FeedHandler.DESCR)) {
active_sub_element = qName;
} else if (qName.equalsIgnoreCase(FeedHandler.LINK)) {
active_sub_element = qName;
} else if (qName.equalsIgnoreCase(FeedHandler.PUBDATE)) {
active_sub_element = qName;
} else if (qName.equalsIgnoreCase(FeedHandler.ENCLOSURE)) {
currentItem.setMedia(new FeedMedia(currentItem,
attributes.getValue(FeedHandler.ENC_URL),
Long.parseLong(attributes.getValue(FeedHandler.ENC_LEN)),
attributes.getValue(FeedHandler.ENC_TYPE)));
} else if(qName.equalsIgnoreCase(FeedHandler.IMAGE)) {
feed.setImage(new FeedImage());
active_root_element = qName;
} else if(qName.equalsIgnoreCase(FeedHandler.URL)) {
active_sub_element = qName;
}
}
}
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