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/*
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License: LGPL as per: http://www.gnu.org/copyleft/lesser.html
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$Id$
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*/
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/**
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* Stores a GML Feature or FeatureCollection as defined by the
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* Open GIS Conortium http://opengis.org.
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*
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* @constructor
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* @base ModelBase
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* @author Cameron Shorter
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* @requires Sarissa
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* @param modelNode The model's XML object node from the configuration document.
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* @param parent The parent model for the object.
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*/
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function GeoRSS(modelNode, parent) {
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// Inherit the ModelBase functions and parameters
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ModelBase.apply(this, new Array(modelNode, parent));
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/**
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* convert coordinates in the GML document to the SRS of the map container,
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* if required. The coordinate values are replaced in the GML document.
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* @param objRef Pointer to this object.
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*/
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this.initItems = function(objRef) {
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var items = objRef.doc.selectNodes("rdf:RDF/rss:item");
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if( items.length == 0 ) {
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items = objRef.doc.selectNodes("atom:feed/atom:entry");
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}
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//alert(Sarissa.serialize(objRef.doc) );
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//alert( "items:"+items.length );
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for (var i=0; i<items.length; ++i) {
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var item = items[i];
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item.setAttribute("id", "RSS_Item_"+mbIds.getId());
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//convert to GML?
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}
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}
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this.addFirstListener("loadModel",this.initItems,this);
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/**
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* Returns the list of nodes selected by the nodeSelectpath
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* @return list of nodes selected
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*/
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this.getFeatureNodes = function() {
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return this.doc.selectNodes(this.nodeSelectXpath);
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}
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/**
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* Returns a label for a node in the feature list
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* @param featureNode the feature node to selectfrom
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* @return a label for this feature
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*/
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this.getFeatureName = function(featureNode) {
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var labelNode = featureNode.selectSingleNode("rss:title");
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if( labelNode == null )
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labelNode = featureNode.selectSingleNode("atom:title");
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return labelNode?labelNode.firstChild.nodeValue:"No RSS title";
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}
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/**
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* Returns an ID value for a node in the feature list
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* @param featureNode the feature node to selectfrom
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* @return ID for this feature
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*/
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this.getFeatureId = function(featureNode) {
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var id = featureNode.getAttribute("id")
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if( id )
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return id;
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id = featureNode.getAttribute("atom:id")
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if( id )
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return id;
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return "no_id";
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}
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/**
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* Returns a point geometry for the feature
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* @param featureNode the feature node to select from
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* @return the geometric point for the node
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*/
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this.getFeaturePoint = function(featureNode) {
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if (featureNode.selectSingleNode("geo:long")) {
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var pointX = featureNode.selectSingleNode("geo:long").firstChild.nodeValue;
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var pointY = featureNode.selectSingleNode("geo:lat").firstChild.nodeValue;
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return new Array(pointX, pointY);
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} else {
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var pos = featureNode.selectSingleNode("georss:where/gml:Point/gml:pos")
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if( pos != null ) {
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var coordstr = pos.firstChild.nodeValue
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//alert("coords:"+coordstr );
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var coords = coordstr.split(" ")
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var pointX = coords[0]
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var pointY = coords[1]
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return new Array(pointX, pointY);
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} else {
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return new Array(0,0); //or some other error to return?
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}
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}
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}
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/**
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* Returns a specific icon for that entry
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* @param featureNode the feature node to select from
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* @return the geometric point for the node
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*/
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this.getFeatureIcon = function( featureNode ) {
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if( featureNode == null )
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return null;
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// look for an icon tag
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var icon = featureNode.selectSingleNode("atom:icon");
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if (icon != undefined) {
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return icon.firstChild.nodeValue;
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} else {
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return null;
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}
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}
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}
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