Link to home
Start Free TrialLog in
Avatar of jexpert7
jexpert7

asked on

Parse syndication feed using jdom

Hello,

Hello I have to parse a online feed using syndication and jdom. All I would need is to get the
epi:category element where I am unable using just syndication API.. Please help

Below is the java program I have used.
import java.io.File;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Iterator;
import java.util.List;

import com.sun.syndication.feed.synd.SyndContent;
import com.sun.syndication.feed.synd.SyndEntryImpl;
import com.sun.syndication.feed.synd.SyndEntry;
import com.sun.syndication.feed.synd.SyndFeed;
import com.sun.syndication.io.SyndFeedInput;
import com.sun.syndication.io.SyndFeedOutput;
import com.sun.syndication.io.XmlReader;

import org.jdom.input.SAXBuilder;
import org.jdom.output.XMLOutputter;
import org.jdom.xpath.XPath;
import org.jdom.*;

public class CheckFeed {

      public static void main(String[] args) {
            try {
                  //URL feedUrl = new URL("https://gmail.google.com/gmail/feed/atom");
                  URL feedUrl  = new URL("https://api.entertainment.com/AtomServer3/feeds/category?location=48084");

                  HttpURLConnection httpcon = (HttpURLConnection)feedUrl.openConnection();
                  String encoding = new sun.misc.BASE64Encoder().encode("demo:demo".getBytes());
                  httpcon.setRequestProperty ("Authorization", "Basic " + encoding);
                  SyndFeedInput input = new SyndFeedInput();
                  SyndFeed feed = input.build(new XmlReader(httpcon));
                  //String value = ((SyndEntry) feed.getEntries().get(0)).getDescription().getValue();
                  //SyndFeed feed = input.build(new XmlReader(feedUrl));

                  //System.out.println("Feed:value " + value);
                  System.out.println("Title: " + feed.getTitle());
                  System.out.println("Feed Author: "+ feed.getAuthors());
                  
                  
                  SyndFeedOutput outputjdom = new SyndFeedOutput();
                  // will output feed as jdom
                  Document doc = outputjdom.outputJDom(feed);
                  //SAXBuilder builder = new SAXBuilder();
                  //Document doc = builder.build((File) feed);
                  XPath x      = XPath.newInstance("/feed/entry");
                  List list    = x.selectNodes(doc);
                  Iterator it2 = list.iterator();
                  while (it2.hasNext()) {
                        System.out.println("Content:"+it2.toString());
                  }
                  //listElements(list, "");
                  //doc.toString() is part of jdom should output the document to console            
                  System.out.println("Document::"+doc.toString());                  

                  Element root = doc.getRootElement();
                  System.out.println("content size is "+root.getContentSize());                  
                  
                  
                  //List entries = feed.getEntries();
                  //System.out.println("Total Entries : " + entries.size());
            } catch (Exception ex) {
                  ex.printStackTrace();
                  System.out.println("ERROR: " + ex.getMessage());
            }
      }

}

Below is the feed XML if I access through browser manually
<?xml version="1.0" encoding="UTF-8"?>
<feed xmlns="http://www.w3.org/2005/Atom" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:epi_ps="https://api.entertainment.com/AtomServer3/doc/index.html#psReference" xmlns:sy="http://purl.org/rss/1.0/modules/syndication/" xmlns:opensearch="http://a9.com/-/spec/opensearch/1.1/" xmlns:epi="https://api.entertainment.com/AtomServer3/doc/index.html#epiReference" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:gml="http://www.opengis.net/gml" xmlns:taxo="http://purl.org/rss/1.0/modules/taxonomy/" xmlns:georss="http://www.georss.org/georss" xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#">
  <author>
    <name>EPI</name>
  </author>
  <id>1300804687145</id>
  <entry>
    <title>Categories</title>
    <id>1300804687145</id>
    <updated>2011-03-22T14:38:07Z</updated>
    <epi:category id="160" name="RedemptionMethod" value="Online Discounts" records="18" />
    <epi:category id="159" name="RedemptionMethod" value="Printable Discounts" records="2644" />
    <epi:category id="161" name="AlphabetIndex" value="0-9" records="0" />
    <epi:category id="131" name="AlphabetIndex" value="A" records="0" />
    <epi:category id="132" name="AlphabetIndex" value="B" records="0" />
    <epi:category id="133" name="AlphabetIndex" value="C" records="0" />
    <epi:category id="134" name="AlphabetIndex" value="D" records="0" />
    <epi:category id="135" name="AlphabetIndex" value="E" records="0" />
    <epi:category id="136" name="AlphabetIndex" value="F" records="0" />
    <epi:category id="137" name="AlphabetIndex" value="G" records="0" />
    <epi:category id="138" name="AlphabetIndex" value="H" records="0" />
    <epi:category id="139" name="AlphabetIndex" value="I" records="0" />
    <epi:category id="140" name="AlphabetIndex" value="J" records="0" />
    <epi:category id="141" name="AlphabetIndex" value="K" records="0" />
    <epi:category id="142" name="AlphabetIndex" value="L" records="0" />
    <epi:category id="143" name="AlphabetIndex" value="M" records="0" />
    <epi:category id="144" name="AlphabetIndex" value="N" records="0" />
    <epi:category id="145" name="AlphabetIndex" value="O" records="0" />
    <epi:category id="146" name="AlphabetIndex" value="P" records="0" />
    <epi:category id="147" name="AlphabetIndex" value="Q" records="0" />
    <epi:category id="148" name="AlphabetIndex" value="R" records="0" />
    <epi:category id="149" name="AlphabetIndex" value="S" records="0" />
    <epi:category id="150" name="AlphabetIndex" value="T" records="0" />
    <epi:category id="151" name="AlphabetIndex" value="U" records="0" />
    <epi:category id="152" name="AlphabetIndex" value="V" records="0" />
    <epi:category id="153" name="AlphabetIndex" value="W" records="0" />
    <epi:category id="154" name="AlphabetIndex" value="X" records="0" />
    <epi:category id="155" name="AlphabetIndex" value="Y" records="0" />
    <epi:category id="156" name="AlphabetIndex" value="Z" records="0" />
    <epi:category id="25" name="Category" value="Dining" records="1629" />
    <epi:category id="26" name="Category" value="Events &amp; Attractions" records="287" />
    <epi:category id="27" name="Category" value="Shopping" records="704" />
    <epi:category id="91" name="Category" value="Travel" records="42" />
    <epi:category id="80" name="SubCategory" value="Informal &amp; Carryout" records="981" />
    <epi:category id="39" name="SubCategory" value="Casual Dining" records="565" />
    <epi:category id="42" name="SubCategory" value="Fine Dining" records="83" />
    <epi:category id="56" name="SubCategory" value="Attractions" records="16" />
    <epi:category id="65" name="SubCategory" value="Automotive" records="141" />
    <epi:category id="58" name="SubCategory" value="Bowling" records="53" />
    <epi:category id="84" name="SubCategory" value="Car Rental" records="18" />
    <epi:category id="32" name="SubCategory" value="Dry Cleaning" records="33" />
    <epi:category id="45" name="SubCategory" value="Golf" records="51" />
    <epi:category id="40" name="SubCategory" value="Grocery" records="11" />
    <epi:category id="81" name="SubCategory" value="Health &amp; Beauty" records="50" />
    <epi:category id="82" name="SubCategory" value="Home &amp; Garden" records="291" />
    <epi:category id="86" name="SubCategory" value="Hotel" records="24" />
    <epi:category id="64" name="SubCategory" value="Live Events" records="17" />
    <epi:category id="49" name="SubCategory" value="Museums" records="11" />
    <epi:category id="73" name="SubCategory" value="Music/Books/Video" records="5" />
    <epi:category id="62" name="SubCategory" value="Retail" records="156" />
    <epi:category id="90" name="SubCategory" value="Special Events" records="9" />
    <epi:category id="63" name="SubCategory" value="Sporting Events" records="34" />
    <epi:category id="34" name="SubCategory" value="Miscellaneous" records="94" />
    <epi:category id="471" name="SubCategory" value="Movies" records="11" />
    <epi:category id="485" name="SubCategory" value="Services" records="91" />
    <epi:category id="168" name="CuisineType" value="American" records="689" />
    <epi:category id="182" name="CuisineType" value="Asian" records="46" />
    <epi:category id="184" name="CuisineType" value="Cajun/Creole" records="4" />
    <epi:category id="185" name="CuisineType" value="Canadian" records="23" />
    <epi:category id="179" name="CuisineType" value="Coffee House" records="43" />
    <epi:category id="180" name="CuisineType" value="European" records="26" />
    <epi:category id="176" name="CuisineType" value="Indian" records="16" />
    <epi:category id="170" name="CuisineType" value="Italian" records="251" />
    <epi:category id="171" name="CuisineType" value="Mexican" records="45" />
    <epi:category id="178" name="CuisineType" value="Middle Eastern" records="20" />
    <epi:category id="469" name="OfferType" value="Frequent Value" records="597" />
    <epi:category id="470" name="OfferType" value="Premium" records="2064" />
  </entry>
</feed>
Avatar of CEHJ
CEHJ
Flag of United Kingdom of Great Britain and Northern Ireland image

Try
import org.jdom.*;

import org.jdom.input.SAXBuilder;

import org.jdom.output.XMLOutputter;

import org.jdom.xpath.XPath;

import java.io.File;

import java.net.HttpURLConnection;
import java.net.URL;

import java.util.Iterator;
import java.util.List;


public class CheckFeed {
    @SuppressWarnings("all")
	public static void main(String[] args) {
		try {
			URL feedUrl = new URL(
					"https://api.entertainment.com/AtomServer3/feeds/category?location=48084");

			HttpURLConnection httpcon = (HttpURLConnection) feedUrl.openConnection();
			String encoding = new sun.misc.BASE64Encoder().encode("demo:demo".getBytes());
			httpcon.setRequestProperty("Authorization", "Basic " + encoding);


			SAXBuilder builder = new SAXBuilder();
			Document doc = builder.build(httpcon.getInputStream());
			XPath x = XPath.newInstance("//epi:category");
			List list = x.selectNodes(doc);
			Iterator it2 = list.iterator();

			while (it2.hasNext()) {
				System.out.println("Content:" + it2.next().toString());
			}

			System.out.println("Document::" + doc.toString());

			Element root = doc.getRootElement();
			System.out.println("content size is " + root.getContentSize());

		} catch (Exception ex) {
			ex.printStackTrace();
			System.out.println("ERROR: " + ex.getMessage());
		}
	}
}

Open in new window

Avatar of jexpert7
jexpert7

ASKER

Thanks a lot CEHJ,

One last thing, this will be easy for you, I have to write a XPATH statement to get the count of "records" value for epi:category id="159" or id="160". what should it be?

    <epi:category id="160" name="RedemptionMethod" value="Online Discounts" records="18" />
    <epi:category id="159" name="RedemptionMethod" value="Printable Discounts" records="2644" />
ASKER CERTIFIED SOLUTION
Avatar of CEHJ
CEHJ
Flag of United Kingdom of Great Britain and Northern Ireland image

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Super, you are the best!!
:)