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JavaXT
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Item Class
package javaxt.rss;
import org.w3c.dom.*;
//******************************************************************************
//** RSS Item
//******************************************************************************
/**
* Used to represent an entry in an RSS feed.
*
******************************************************************************/
public class Item {
private String title;
private String description;
private String author;
private String creator;
private String category;
private java.net.URL link;
private java.net.URL origLink; //<--FeedBurner
private java.util.Date date;
private Location location;
private java.util.ArrayList<Media> media = new java.util.ArrayList<Media>();
//**************************************************************************
//** Constructor
//**************************************************************************
public Item(){}
//**************************************************************************
//** Constructor
//**************************************************************************
public Item(String title, java.net.URL link, java.util.Date date){
this.title = title;
this.link = link;
this.date = date;
}
//**************************************************************************
//** Constructor
//**************************************************************************
/** Creates a new instance of this class using an XML node from an RSS Feed.
*/
protected Item(Node item, java.util.HashMap<String, String> namespaces) {
String mediaNS = namespaces.get("http://search.yahoo.com/mrss");
if (mediaNS==null) mediaNS = "media";
String geoNS = namespaces.get("http://www.w3.org/2003/01/geo/wgs84_pos#");
if (geoNS==null) geoNS = "geo";
String pubDate = null;
String dcDate = null;
String updated = null;
String description = null;
String subtitle = null;
String summary = null;
String lat = null;
String lon = null;
java.util.ArrayList<Node> mediaNodes = new java.util.ArrayList<Node>();
NodeList nodeList = item.getChildNodes();
for (int i=0; i<nodeList.getLength(); i++){
Node node = nodeList.item(i);
if (node.getNodeType()==1){
String nodeName = node.getNodeName().toLowerCase();
String nodeValue = Parser.getNodeValue(node).trim();
if (nodeValue.length()==0) nodeValue = null;
//Parse Common Attributes
if (nodeName.equals("title")) title = nodeValue;
else if (nodeName.equals("author")) author = nodeValue;
else if (nodeName.endsWith("creator")) creator = nodeValue;
else if (nodeName.equalsIgnoreCase("pubDate")) pubDate = nodeValue;
else if (nodeName.equalsIgnoreCase("dc:date")) dcDate = nodeValue;
else if (nodeName.equalsIgnoreCase("updated")) updated = nodeValue;
else if (nodeName.endsWith("description")) description = nodeValue;
else if (nodeName.endsWith("subtitle")) subtitle = nodeValue;
else if (nodeName.endsWith("summary")) summary = nodeValue;
//Parse Link
else if(nodeName.equals("link")){
String url = "";
if (nodeValue!=null){
url = nodeValue.replace("\"", "").trim();
}
if (url.length()==0){
//get href attribute
url = Parser.getAttributeValue(node,"href").trim();
}
if (url.length()>0){
try{ link = new java.net.URL(url); }
catch(Exception e){}
}
}
//Parse FeedBurner Link
else if(nodeName.equals("feedburner:origLink")){
if (nodeValue!=null){
try{ origLink = new java.net.URL(nodeValue); }
catch(Exception e){}
}
}
//Enclosure (e.g. TASS News agency)
else if (nodeName.equals("enclosure")){
addMedia(new Media(node));
}
else if (nodeName.equals("category")){
category = nodeValue;
}
else if(Location.isLocationNode(nodeName, namespaces)){
location = new Location(node, namespaces);
}
else if (nodeName.equals("lat") || nodeName.equals(geoNS + ":lat")){
lat = nodeValue;
}
else if (nodeName.equals("long") || nodeName.equals(geoNS + ":long")){
lon = nodeValue;
}
else{
if (nodeName.startsWith(mediaNS + ":")){
mediaNodes.add(node);
}
}
}
}
//Set date
String date = pubDate;
if (date==null || date.length()==0) date = dcDate;
if (date==null || date.length()==0) date = updated;
if (date!=null && date.length()>0){
try{
this.date = Parser.getDate(date);
}
catch(java.text.ParseException e){
}
}
//Set description
String desc = description;
if (desc==null || desc.length()==0) desc = subtitle;
if (desc==null || desc.length()==0) desc = summary;
this.description = desc;
//Parse media nodes
if (!mediaNodes.isEmpty()){
//Check if there are any content nodes and if those nodes have children (e.g. The Guardian News Feed)
for (Node mediaNode : mediaNodes){
String nodeName = mediaNode.getNodeName().toLowerCase();
if (nodeName.equals(mediaNS + ":content")){
NodeList nodes = mediaNode.getChildNodes();
for (int i=0; i<nodes.getLength(); i++){
Node node = nodes.item(i);
if (node.getNodeType()==1){
addMedia(new Media(mediaNode));
break;
}
}
}
}
//If none of the of the content nodes have children (standard use case)
if (media.isEmpty()){
addMedia(new Media(mediaNodes.toArray(new Node[mediaNodes.size()])));
}
}
//Set location
if (lat!=null && lon!=null){
location = new Location(lat, lon);
}
}
//**************************************************************************
//** getTitle
//**************************************************************************
public String getTitle(){
return title;
}
public void setTitle(String title){
this.title = title;
}
//**************************************************************************
//** getDescription
//**************************************************************************
public String getDescription(){
return description;
}
public void setDescription(String description){
this.description = description;
}
//**************************************************************************
//** getAuthor
//**************************************************************************
public String getAuthor(){
if (author==null && creator!=null) return creator;
return author;
}
public void setAuthor(String author){
this.author = author;
}
//**************************************************************************
//** getCategory
//**************************************************************************
public String getCategory(){
return category;
}
public void setCategory(String category){
this.category = category;
}
//**************************************************************************
//** getLink
//**************************************************************************
/** Returns a link/url associated with the current entry. Returns the
* 'feedburner:origLink' if found. Otherwise returns a url associated with
* the 'link' node.
*/
public java.net.URL getLink(){
if (origLink!=null) return origLink;
else return link;
}
//**************************************************************************
//** setLink
//**************************************************************************
public void setLink(java.net.URL url){
origLink = null;
link = url;
}
//**************************************************************************
//** getDate
//**************************************************************************
/** Return the date/time stamp associated with the current entry. Uses the
* pubDate if it exists. Otherwise, returns dc:date
*/
public java.util.Date getDate(){
return date;
}
//**************************************************************************
//** setDate
//**************************************************************************
public void setDate(java.util.Date date){
this.date = date;
}
//**************************************************************************
//** addMedia
//**************************************************************************
public void addMedia(Media media){
this.media.add(media);
}
//**************************************************************************
//** getMedia
//**************************************************************************
/** Returns an array of media items associated with the current entry.
*/
public Media[] getMedia(){
return media.toArray(new Media[media.size()]);
}
//**************************************************************************
//** getLocation
//**************************************************************************
/** Returns location information associated with the current entry (e.g.
* GeoRSS element).
*/
public Location getLocation(){
return location;
}
//**************************************************************************
//** setLocation
//**************************************************************************
public void setLocation(Location location){
this.location = location;
}
//**************************************************************************
//** toString
//**************************************************************************
public String toString(){
StringBuffer out = new StringBuffer();
String br = "\r\n";
out.append("Title: " + getTitle() + br);
//out.append("Description: " + getDescription() + br);
out.append("Author: " + getAuthor() + br);
out.append("Link: " + getLink() + br);
out.append("Date: " + getDate() + br);
if (location!=null){
out.append("Location: " + location.toWKT() + br);
//out.append("Geometry Name: " + geometry.getName() + br);
//out.append("Geometry SRS: " + geometry.getSRS() + br);
}
for (int i=0; i<media.size(); i++){
System.out.println(media.get(i));
}
return out.toString();
}
//**************************************************************************
//** toXML
//**************************************************************************
/** Returns an XML fragment used by the Feed class to generate an RSS/XML
* document.
*/
protected String toXML(){
StringBuffer str = new StringBuffer();
java.util.HashMap<String, Object> info = new java.util.HashMap<String, Object>();
String title = getTitle();
if (title!=null){
title = title.trim();
if (title.length()>0) info.put("title", title);
}
String desc = getDescription();
if (desc!=null){
desc = desc.trim();
if (desc.length()>0) info.put("description", desc);
}
if (link!=null) info.put("link", link);
if (date!=null) info.put("pubDate", date);
if (!info.isEmpty()){
str.append(" <item>\n");
java.util.Iterator<String> it = info.keySet().iterator();
while (it.hasNext()){
String key = it.next();
Object val = info.get(key);
str.append(" <" + key + ">");
if (val instanceof String){
str.append("<![CDATA[");
str.append(val);
str.append("]]>");
}
else if (val instanceof java.util.Date){
String d = Feed.formatDate((java.util.Date) val);
str.append(d);
}
else{
str.append(val);
}
str.append("</" + key + ">\n");
}
str.append(" </item>\n");
}
return str.toString();
}
}
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