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/*
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License: LGPL as per: http://www.gnu.org/copyleft/lesser.html
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$Id: GeoRSS.js 3882 2008-02-27 15:41:33Z gjvoosten $
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*/
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// Ensure this object's dependancies are loaded.
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mapbuilder.loadScript(baseDir+"/model/ModelBase.js");
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/**
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* Stores a GML Feature or FeatureCollection as defined by the
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* Open Geospatial Consortium (http://www.opengeospatial.org/).
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*
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* WARNING: This model is only to be used if you do not want to embed the GeoRSS feed
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* in the context doc. See also MAP-271
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* @deprecated
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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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/** init
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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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for (var i=0; i<items.length; ++i) {
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var item = items[i];
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item.setAttribute("divid", "RSS_Item_"+mbIds.getId());
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}
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}
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// OBE 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?getNodeValue(labelNode):mbGetMessage("noRssTitle");
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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("divid")
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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 = getNodeValue(featureNode.selectSingleNode("geo:long"));
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var pointY = getNodeValue(featureNode.selectSingleNode("geo:lat"));
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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 = getNodeValue(pos);
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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 the 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.getFeatureGeometry = function(featureNode) {
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if (featureNode.selectSingleNode("geo:long")) {
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var pointX = getNodeValue(featureNode.selectSingleNode("geo:long"));
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var pointY = getNodeValue(featureNode.selectSingleNode("geo:lat"));
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return "POINT " + pointX + "," + pointY;
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}
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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 = getNodeValue(pos);
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return "POINT " + coordstr;
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}
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var posList = featureNode.selectSingleNode("georss:where/gml:LineString/gml:posList")
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if( posList != null ) { //WARNING: could overflow so get all nodes
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var children = posList.childNodes;
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var count = children.length;
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var text="";
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for( var i=0; i<count; i++ ) {
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text += children[i].nodeValue;
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}
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//alert("count:"+ count + " length:"+text.length)
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return "LINESTRING " + text;
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}
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var posList = featureNode.selectSingleNode("georss:where/gml:Polygon/gml:exterior/gml:LinearRing")
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if( posList != null ) {
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var coordstr = getNodeValue(posList);
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return "POLYGON " + coordstr;
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}
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alert(mbGetMessage("invalidGmlGeom"));
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return null
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}
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/**
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* Get the GML Node out of the RSS feed
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*/
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this.getFeatureGml = function(featureNode) {
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var where = featureNode.selectSingleNode("georss:where")
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if( where != null ) {
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var gml = where.firstChild;
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return gml;
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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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* 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 getNodeValue(icon);
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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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