Mega Code Archive
Rss Parser
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//package com.dreamcode.anfeedreader.utils;
import java.io.InputStream;
import java.net.URL;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
class FeedItem {
private int feed_id;
private int id;
private String title;
private String description;
private String link;
private String pubDate;
private String md5hash;
private String status;
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getMd5hash() {
return md5hash;
}
public void setMd5hash(String md5hash) {
this.md5hash = md5hash;
}
public int getFeed_id() {
return feed_id;
}
public void setFeed_id(int feed_id) {
this.feed_id = feed_id;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getLink() {
return link;
}
public void setLink(String link) {
this.link = link;
}
public String getPubDate() {
return pubDate;
}
public void setPubDate(String pubDate) {
this.pubDate = pubDate;
}
public String toString() {
return (this.title + ": " + this.pubDate + "n" + this.description);
}
}
/* Usage:
RssParser rp = new RssParser("<RSS Feed URL>");
rp.parse();
RssFeed feed = rp.getFeed();
// Listing all categories & the no. of elements in each category
if (feed.getCategory() != null)
{
System.out.println("Category List: ");
for (String category : feed.getCategory().keySet())
{
System.out.println(category
+ ": "
+ ((ArrayList<FeedItem>)feed.getCategory().get(category)).size());
}
}
// Listing all items in the feed
for (int i = 0; i < feed.getItems().size(); i++)
System.out.println(feed.getItems().get(i).getTitle());
*/
public class RssParser extends DefaultHandler
{
private String urlString;
private RssFeed rssFeed;
private StringBuilder text;
private FeedItem item;
public RssParser(String url)
{
this.urlString = url;
this.text = new StringBuilder();
}
public void parse()
{
InputStream urlInputStream = null;
SAXParserFactory spf = null;
SAXParser sp = null;
try
{
URL url = new URL(this.urlString);
urlInputStream = url.openConnection().getInputStream();
spf = SAXParserFactory.newInstance();
XMLReader reader = null;
if (spf != null)
{
sp = spf.newSAXParser();
// sp.parse(urlInputStream, this);
reader = sp.getXMLReader();
reader.setContentHandler(this);
reader.parse(new InputSource(urlInputStream));
}
}
/*
* Exceptions need to be handled
* MalformedURLException
* ParserConfigurationException
* IOException
* SAXException
*/
catch (Exception e)
{
System.out.println("Exception: " + e);
e.printStackTrace();
}
finally
{
try
{
if (urlInputStream != null) urlInputStream.close();
}
catch (Exception e) {}
}
}
public RssFeed getFeed()
{
return (this.rssFeed);
}
public void startElement(String uri, String localName, String qName,
Attributes attributes)
{
if (localName.equalsIgnoreCase("channel"))
this.rssFeed = new RssFeed();
else if (localName.equalsIgnoreCase("item") && (this.rssFeed != null))
{
this.item = new FeedItem();
this.rssFeed.addItem(this.item);
}
}
public void endElement(String uri, String localName, String qName)
{
if (this.rssFeed == null)
return;
if (localName.equalsIgnoreCase("item"))
this.item = null;
else if (localName.equalsIgnoreCase("title"))
{
if (this.item != null) this.item.setTitle(this.text.toString().trim());
else this.rssFeed.title = this.text.toString().trim();
}
else if (localName.equalsIgnoreCase("link"))
{
if (this.item != null) this.item.setLink(this.text.toString().trim());
else this.rssFeed.link = this.text.toString().trim();
}
else if (localName.equalsIgnoreCase("description"))
{
if (this.item != null) this.item.setDescription(this.text.toString().trim());
else this.rssFeed.description = this.text.toString().trim();
}
else if (localName.equalsIgnoreCase("pubDate") && (this.item != null))
this.item.setPubDate(this.text.toString().trim());
this.text.setLength(0);
}
public void characters(char[] ch, int start, int length)
{
this.text.append(ch, start, length);
}
public static class RssFeed
{
public String title;
public String description;
public String link;
private LinkedList <FeedItem> items;
private HashMap <String, List <FeedItem>> category;
public void addItem(FeedItem item)
{
if (this.items == null)
this.items = new LinkedList<FeedItem>();
this.items.add(item);
}
public void addItem(String category, FeedItem item)
{
if (this.category == null)
this.category = new HashMap<String, List<FeedItem>>();
if (!this.category.containsKey(category))
this.category.put(category, new LinkedList<FeedItem>());
this.category.get(category).add(item);
}
public List<FeedItem> getItems() {
return items;
}
public void setItems(List<FeedItem> items) {
this.items = (LinkedList<FeedItem>) items;
}
public HashMap<String, List<FeedItem>> getCategory() {
return category;
}
public void setCategory(HashMap<String, List<FeedItem>> category) {
this.category = category;
}
}
}
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