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pborissow
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Initial commit of the javaxt rss library
git-svn-id: svn://192.168.0.80/JavaXT/javaxt-rss@53 2c7b0aa6-e0b2-3c4e-bb4a-8b65b6c465ff
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‎src/javaxt/rss/Feed.java

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package javaxt.rss;
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import org.w3c.dom.*;
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import javaxt.xml.DOM;
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import javaxt.geospatial.geometry.Geometry;
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import javaxt.geospatial.coordinate.Parser;
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//******************************************************************************
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//** RSS Feed
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//******************************************************************************
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/**
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* Used to represent an RSS feed/channel. Returns a list of entries and other
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* attributes associated with the feed.
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*
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******************************************************************************/
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public class Feed {
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private String title = "";
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private String description = "";
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private java.net.URL link = null;
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private Geometry geometry = null;
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private javaxt.utils.Date lastUpdate = null;
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private Integer interval = null;
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private Item[] Items = null;
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//**************************************************************************
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//** Instantiate Feed
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//**************************************************************************
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/** Creates a new instance of Feed */
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protected Feed(org.w3c.dom.Node node) {
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java.util.Vector vec = new java.util.Vector();
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NodeList nodeList = node.getChildNodes();
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for (int i=0; i<nodeList.getLength(); i++){
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node = nodeList.item(i);
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String nodeName = node.getNodeName().toLowerCase();
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String nodeValue = DOM.getNodeValue(node);
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//System.out.println(nodeName + ": " + nodeValue);
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if (nodeName.equals("title")) title = nodeValue;
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if (nodeName.equals("description") || nodeName.equals("subtitle")){
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description = nodeValue;
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}
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if (nodeName.equals("where") || nodeName.equals("georss:where") ||
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nodeName.equals("point") || nodeName.equals("georss:point") ||
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nodeName.equals("line") || nodeName.equals("georss:line") ||
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nodeName.equals("polygon") || nodeName.equals("georss:polygon") ||
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nodeName.equals("box") || nodeName.equals("georss:box")){
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try{
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geometry = new Parser(nodeValue).getGeometry();
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}
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catch(Exception e){}
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}
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if (nodeName.equals("link")){
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String url = nodeValue.trim();
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if (url.length()==0){
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//get href attribute
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}
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try{
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link = new java.net.URL(url);
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}
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catch(Exception e){}
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}
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if (nodeName.equals("item") || nodeName.equals("entry")){
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vec.add(new Item(node));
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}
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if (nodeName.equalsIgnoreCase("lastBuildDate")){
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if (nodeValue!=null) lastUpdate = new javaxt.utils.Date(nodeValue);
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if (lastUpdate.failedToParse()) lastUpdate = null;
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}
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if (nodeName.equals("ttl")){
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try{
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interval = javaxt.utils.string.toInt(nodeValue);
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}
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catch(Exception e){
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}
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}
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}
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//Convert Vector to Array
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Object[] arr = vec.toArray();
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Items = new Item[arr.length];
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for (int i=0; i<Items.length; i++){
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Items[i] = (Item) arr[i];
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}
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}
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public String getTitle(){ return title; }
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public String getDescription(){ return description; }
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public java.net.URL getLink(){ return link; }
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public Item[] getItems(){ return Items; }
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public Geometry getLocation(){ return geometry; }
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public javaxt.utils.Date getLastUpdate(){
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return lastUpdate;
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}
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//**************************************************************************
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//** getRefreshInterval
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//**************************************************************************
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/** Returns the number of minutes that the channel can be cached before
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* refreshing from the source. Derived from the ttl tag in RSS feeds.
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* Returns null if the refresh interval is not specified or unknown.
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*/
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public Integer getRefreshInterval(){
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return interval;
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}
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public String toString(){
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StringBuffer out = new StringBuffer();
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String br = "\r\n";
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out.append("Title: " + getTitle() + br);
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out.append("Description: " + getDescription() + br);
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out.append("Last Update: " + getLastUpdate() + br);
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out.append("Link: " + getLink() + br);
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if (geometry!=null){
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out.append("Location: " + geometry + br);
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}
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return out.toString();
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}
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}

‎src/javaxt/rss/Item.java

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package javaxt.rss;
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import java.util.ArrayList;
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import org.w3c.dom.*;
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import javaxt.xml.DOM;
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import javaxt.geospatial.geometry.Geometry;
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import javaxt.geospatial.coordinate.Parser;
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//******************************************************************************
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//** RSS Item
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//******************************************************************************
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/**
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* Used to represent an entry in an RSS feed.
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*
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******************************************************************************/
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public class Item {
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private String title = "";
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private String description = "";
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private String author = null;
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private String creator = null;
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private java.net.URL link = null;
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private java.net.URL origLink = null; //<--FeedBurner
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private Geometry geometry = null;
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private NodeList nodeList = null;
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private String pubDate = null;
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private String dcDate = null;
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private java.util.List<Media> media = new java.util.ArrayList<Media>();
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/** Creates a new instance of Item */
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protected Item(org.w3c.dom.Node node) {
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nodeList = node.getChildNodes();
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for (int i=0; i<nodeList.getLength(); i++){
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node = nodeList.item(i);
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String nodeName = node.getNodeName().toLowerCase();
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String nodeValue = DOM.getNodeValue(node).trim();
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if (nodeName.equals("title")) title = nodeValue;
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//Parse Description
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if (nodeName.equals("description") || nodeName.equals("subtitle")){
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if (description==null || description.length()==0){
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description = nodeValue;
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}
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}
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//Parse Link
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if (nodeName.equals("link")){
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String url = nodeValue;
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if (url.length()==0){
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//get href attribute
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url = DOM.getAttributeValue(node,"href").trim();
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}
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if (url.length()>0){
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try{ link = new java.net.URL(url); }
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catch(Exception e){}
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}
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}
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//Parse FeedBurner Link
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if (nodeName.equals("feedburner:origLink")){
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String url = nodeValue.trim();
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if (url.length()>0){
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try{ origLink = new java.net.URL(url); }
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catch(Exception e){}
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}
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}
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if (nodeName.equals("author")) author = nodeValue;
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if (nodeName.endsWith("creator")) creator = nodeValue;
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if (nodeName.equalsIgnoreCase("pubDate")) pubDate = nodeValue;
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if (nodeName.equalsIgnoreCase("dc:date")) dcDate = nodeValue;
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//Parse Location Information (GeoRSS)
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if (nodeName.equals("where") || nodeName.equals("georss:where") ||
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nodeName.equals("point") || nodeName.equals("georss:point") ||
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nodeName.equals("line") || nodeName.equals("georss:line") ||
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nodeName.equals("polygon") || nodeName.equals("georss:polygon") ||
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nodeName.equals("box") || nodeName.equals("georss:box")){
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try{
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geometry = new Parser(nodeValue).getGeometry();
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}
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catch(Exception e){}
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}
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if (nodeName.startsWith("media:")){
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media.add(new Media(node));
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}
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}
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}
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public String getTitle(){ return title; }
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public String getDescription(){ return description; }
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public String getAuthor(){
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if (author==null && creator!=null) return creator;
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return author;
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}
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//**************************************************************************
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//** getLink
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//**************************************************************************
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/** Returns a link/url associated with the current entry. Returns the
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* 'feedburner:origLink' if found. Otherwise returns a url associated with
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* the 'link' node.
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*/
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public java.net.URL getLink(){
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if (origLink!=null) return origLink;
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else return link;
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}
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//**************************************************************************
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//** getDate
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//**************************************************************************
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/** Return the date/time stamp associated with the current entry. Uses the
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* pubDate if it exists. Otherwise, returns dc:date
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*/
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public javaxt.utils.Date getDate(){
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String date = pubDate;
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if (date.length()==0) date = dcDate;
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if (date.length()>0) return new javaxt.utils.Date(date);
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else return null;
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}
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public Media[] getMedia(){
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Media[] arr = new Media[media.size()];
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for (int i=0; i<media.size(); i++){
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arr[i] = media.get(i);
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}
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return arr;
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}
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//**************************************************************************
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//** getLocation
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//**************************************************************************
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/** Returns a geometry associated with the current entry.
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*/
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public Geometry getLocation(){ return geometry; }
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public NodeList getNodeList(){
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return nodeList;
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}
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public String toString(){
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StringBuffer out = new StringBuffer();
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String br = "\r\n";
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out.append("Title: " + getTitle() + br);
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//out.append("Description: " + getDescription() + br);
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out.append("Author: " + getAuthor() + br);
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out.append("Link: " + getLink() + br);
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out.append("Date: " + getDate() + br);
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if (geometry!=null){
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out.append("Location: " + geometry + br);
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out.append("Geometry Name: " + geometry.getName() + br);
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out.append("Geometry SRS: " + geometry.getSRS() + br);
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}
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for (int i=0; i<media.size(); i++){
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System.out.println(media.get(i));
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}
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return out.toString();
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}
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}

‎src/javaxt/rss/Media.java

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package javaxt.rss;
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import javaxt.xml.DOM;
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//******************************************************************************
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//** Media Class
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//******************************************************************************
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/**
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* Used to parse a media node associated with an RSS entry
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*
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******************************************************************************/
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public class Media {
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private String type;
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private java.net.URL url;
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private String credit;
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private String description;
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//**************************************************************************
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//** Constructor
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//**************************************************************************
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/** Creates a new instance of Media. */
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protected Media(org.w3c.dom.Node node) {
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type = DOM.getAttributeValue(node,"type").trim();
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//Parse url
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String link = DOM.getAttributeValue(node,"url").trim();
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if (link.length()>0){
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try{ url = new java.net.URL(link); }
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catch(Exception e){}
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}
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org.w3c.dom.NodeList nodeList = node.getChildNodes();
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for (int i=0; i<nodeList.getLength(); i++){
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node = nodeList.item(i);
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if (node.getNodeType()==1){
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String nodeName = node.getNodeName();
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if (nodeName.endsWith("credit")){
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credit = DOM.getNodeValue(node).trim();
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}
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else if (nodeName.endsWith("description")){
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description = DOM.getNodeValue(node).trim();
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}
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}
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}
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}
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public String getType(){ return type; }
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public String getCredit(){ return credit; }
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public String getDescription(){ return description; }
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public java.net.URL getLink(){ return url; }
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public String toString(){
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StringBuffer out = new StringBuffer();
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String br = "\r\n";
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String mimeType = getType();
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if (mimeType.contains("/")) mimeType = mimeType.substring(0, mimeType.indexOf("/"));
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mimeType = mimeType.substring(0,1).toUpperCase() + mimeType.substring(1);
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out.append(mimeType + ": " + getLink() + br);
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out.append("Description: " + getDescription() + br);
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out.append("Credit: " + getCredit() + br);
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return out.toString();
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}
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}

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