javaxt-rss/src/javaxt/rss/Item.java at master · javaxt-project/javaxt-rss · GitHub

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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();

}

javaxt-rss/src/javaxt/rss/Item.java at master · javaxt-project/javaxt-rss · GitHub

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