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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 Web Map Server (WMS) Capabilities document as defined by the
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* Open Geospatial Consortium (http://opengis.org and extensions the the WMC.
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*
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* @constructor
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* @author Mike Adair
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* @param modelNode The model's XML object node from the configuration document.
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* @param parent The model object that this widget belongs to.
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*/
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function WmsCapabilities(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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this.namespace = "xmlns:wms='http://www.opengis.net/wms' xmlns:xlink='http://www.w3.org/1999/xlink'";
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/**
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* Returns the serverUrl for the WMS request passed in with the specified
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* HTTP method from the capabilities doc.
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* @param requestName the WMS request to get the URL for
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* @param method http method for the request
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* @param feature ignored for WMS docs
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* @return URL for the specified request with the specified method
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*/
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this.getServerUrl = function(requestName, method, feature) {
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var version = this.getVersion();
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if (version == "1.0.0") {
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requestName = requestName.substring(3); //strip of "Get" part of request name
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var xpath = "/WMT_MS_Capabilities/Capability/Request/"+requestName;
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if (method.toLowerCase() == "post") {
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xpath += "/DCPType/HTTP/Post";
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} else {
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xpath += "/DCPType/HTTP/Get";
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}
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return this.doc.selectSingleNode(xpath).getAttribute("onlineResource");
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} else {
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var xpath = "/WMT_MS_Capabilities/Capability/Request/"+requestName;
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if (method.toLowerCase() == "post") {
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xpath += "/DCPType/HTTP/Post/OnlineResource";
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} else {
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xpath += "/DCPType/HTTP/Get/OnlineResource";
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}
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return this.doc.selectSingleNode(xpath).getAttribute("xlink:href");
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}
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}
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/**
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* Returns the version for the WMS
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* @return the WMS version
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*/
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this.getVersion = function() {
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var xpath = "/WMT_MS_Capabilities";
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return this.doc.selectSingleNode(xpath).getAttribute("version");
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}
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/**
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* @return the title of the WMS server
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*/
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this.getServerTitle = function() {
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var xpath = "/WMT_MS_Capabilities/Service/Title";
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var node = this.doc.selectSingleNode(xpath);
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return node.firstChild.nodeValue;
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}
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/**
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* @return the first image format listed
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*/
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this.getImageFormat = function() {
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var version = this.getVersion();
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if (version == "1.0.0") {
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var xpath = "/WMT_MS_Capabilities/Capability/Request/Map/Format"; //strip of "Get" part of request name
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var node = this.doc.selectSingleNode(xpath);
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if(_SARISSA_IS_IE) {
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return "image/"+node.firstChild.baseName.toLowerCase();
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}
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else {
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return "image/"+node.firstChild.localName.toLowerCase();
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}
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} else {
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var xpath = "/WMT_MS_Capabilities/Capability/Request/GetMap/Format";
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var node = this.doc.selectSingleNode(xpath);
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return node.firstChild.nodeValue;
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}
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}
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/**
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* @return the name of the WMS server
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*/
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this.getServiceName = function() {
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var xpath = "/WMT_MS_Capabilities/Service/Name";
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var node = this.doc.selectSingleNode(xpath);
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return node.firstChild.nodeValue;
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}
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/**
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* Returns the Layer node with the specified name from the list of nodes
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* selected by the nodeSelectXpath from the capabilities doc.
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* @param featureName name of the featureType to look up
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* @return the Layer node with the specified name.
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*/
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this.getFeatureNode = function(featureName) {
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return this.doc.selectSingleNode(this.nodeSelectXpath+"[Name='"+featureName+"']");
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}
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}
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