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<a href='http://mapbuilder.sourceforge.net'>Community Map Builder</a> 27 Apr 2008 Overview
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<b><a href='http://mapbuilder.sourceforge.net'>Community Map Builder</a> 27 Apr 2008</b></em>
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<h2>FeatureCollection.js</h2>
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<h4>Summary</h4>
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No overview generated for 'FeatureCollection.js'<BR/><BR/>
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<b>Class Summary</b>
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<td width="15%"><b><a href="FeatureCollection.html">FeatureCollection</a></b></td>
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<td> </td>
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</table>
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<hr/>
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<!-- ========== METHOD SUMMARY =========== -->
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<!-- ========== END METHOD SUMMARY =========== -->
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<pre class="sourceview"><span class="comment">/*
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License: LGPL as per: http://www.gnu.org/copyleft/lesser.html
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$Id: FeatureCollection.js 3882 2008-02-27 15:41:33Z gjvoosten $
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*/</span>
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<span class="comment">
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// Ensure this object's dependancies are loaded.</span>
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mapbuilder.loadScript(baseDir+<span class="literal">"/model/ModelBase.js"</span>);
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<span class="comment">/**
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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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* <span class="attrib">@constructor</span>
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* <span class="attrib">@base</span> ModelBase
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* <span class="attrib">@author</span> Cameron Shorter
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* <span class="attrib">@requires</span> Sarissa
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* <span class="attrib">@param</span> modelNode The model's XML object node from the configuration document.
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* <span class="attrib">@param</span> parent The parent model for the object.
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*/</span>
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<span class="reserved">function</span> FeatureCollection(modelNode, parent) {
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<span class="comment"> // Inherit the ModelBase functions and parameters</span>
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ModelBase.apply(<span class="reserved">this</span>, new Array(modelNode, parent));
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<span class="reserved">this</span>.featureTagName = <span class="reserved">this</span>.getProperty(<span class="literal">"mb:featureTagName"</span>, <span class="literal">"topp:CITY_NAME"</span>);
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<span class="reserved">this</span>.coordsTagName = <span class="reserved">this</span>.getProperty(<span class="literal">"mb:coordsTagName"</span>, <span class="literal">"//gml:coordinates"</span>);
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<span class="reserved">this</span>.nodeSelectXpath = <span class="reserved">this</span>.getProperty(<span class="literal">"mb:nodeSelectXpath"</span>);
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<span class="reserved">this</span>.coordSelectXpath = <span class="reserved">this</span>.getProperty(<span class="literal">"mb:coordSelectXpath"</span>, <span class="literal">"topp:the_geom/gml:MultiPoint/gml:pointMember/gml:Point/gml:coordinates"</span>);
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<span class="comment">
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// Namespace to use when doing Xpath queries, usually set in config file.</span>
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<span class="comment"> //if (!this.namespace){</span>
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<span class="comment"> // this.namespace = "xmlns:gml='http://www.opengis.net/gml' xmlns:wfs='http://www.opengis.net/wfs'";</span>
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<span class="comment"> //}</span>
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<span class="comment">/**
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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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* <span class="attrib">@param</span> objRef Pointer to this object.
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*/</span>
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<span class="reserved">this</span>.convertCoords = <span class="reserved">function</span>(objRef) {
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<span class="reserved">if</span>( objRef.doc && objRef.containerModel && objRef.containerModel.doc ) {
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var coordNodes = objRef.doc.selectNodes( objRef.coordsTagName );
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<span class="reserved">if</span> (coordNodes.length>0 && objRef.containerModel) {
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var srsNode = coordNodes[0].selectSingleNode(<span class="literal">"ancestor-or-self::*/@srsName"</span>);
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<span class="reserved">if</span>( srsNode && (srsNode.nodeValue.toUpperCase() != objRef.containerModel.getSRS().toUpperCase()) ) {
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var sourceProj = new OpenLayers.Projection(srsNode.nodeValue);
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objRef.setParam(<span class="literal">"modelStatus"</span>,mbGetMessage(<span class="literal">"convertingCoords"</span>));
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var containerProj = new OpenLayers.Projection(objRef.containerModel.getSRS());
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<span class="reserved">for</span> (var i=0; i<coordNodes.length; ++i) {
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var coords = getNodeValue(coordNodes[i]);
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var coordsArray = coords.split(<span class="literal">' '</span>);
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var newCoords = <span class="literal">''</span>;
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<span class="reserved">for</span> (var j=0; j<coordsArray.length; ++j) {
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var xy = coordsArray[j].split(<span class="literal">','</span>);
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<span class="reserved">if</span> (xy.length==2) {
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var pt=new OpenLayers.Geometry.Point(xy[0],xy[1]);
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pt.transform(sourceProj,containerProj);
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newCoords += pt.x + <span class="literal">','</span> + pt.y + <span class="literal">' '</span>;
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}
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}
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coordNodes[i].firstChild.nodeValue=newCoords;
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}
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}
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}
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}
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}
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<span class="comment">/**
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* Called when the OWSContext gets loaded
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*/</span>
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<span class="reserved">this</span>.loadWfsRequests = <span class="reserved">function</span>(objRef) {
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<span class="comment"> //alert( "FeatureCollection loadModel:"+(new XMLSerializer()).serializeToString(objRef.containerModel.doc))</span>
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<span class="comment"> // we need to retrieve all the features</span>
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<span class="reserved">if</span>( objRef.containerModel.doc != null) {
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<span class="comment"> //alert( "FeatureCollection loadModel:"+(new XMLSerializer()).serializeToString(objRef.containerModel.doc))</span>
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var featureTypes = objRef.containerModel.doc.selectNodes(<span class="literal">"/wmc:OWSContext/wmc:ResourceList/wmc:FeatureType"</span>);
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<span class="reserved">if</span>( featureTypes.length > 0 ) {
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<span class="reserved">for</span>( var i=0; i<featureTypes.length; i++) {
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var httpPayload = new Object();
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var wfsFeature = featureTypes[i]
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<span class="comment"> //alert( "feature:"+ (new XMLSerializer()).serializeToString(wfsFeature) )</span>
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var server = wfsFeature.selectSingleNode(<span class="literal">"wmc:Server"</span>)
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<span class="comment"> //alert( "server:"+ (new XMLSerializer()).serializeToString(server) )</span>
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var onlineResource = server.selectSingleNode(<span class="literal">"wmc:OnlineResource"</span>)
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<span class="comment"> //alert( "onlineResource:"+ (new XMLSerializer()).serializeToString(onlineResource) )</span>
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httpPayload.method = onlineResource.getAttribute(<span class="literal">"method"</span>)
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httpPayload.url = onlineResource.getAttribute(<span class="literal">"xlink:href"</span>)
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<span class="comment"> //alert( "server:"+ httpPayload.method + " " + httpPayload.url )</span>
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var query = wfsFeature.selectSingleNode(<span class="literal">"wfs:GetFeature"</span>)
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<span class="comment"> //alert( "query2:"+ (new XMLSerializer()).serializeToString( query ))</span>
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httpPayload.postData = (new XMLSerializer()).serializeToString( query )
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<span class="comment">
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// This does not work on IE for some reaso</span>
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<span class="comment"> // wfsFeature.model = objRef;</span>
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objRef.wfsFeature = wfsFeature
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objRef.newRequest(objRef,httpPayload);
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<span class="comment">
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//objRef.containerModel.setParam('addLayer', wfsFeature);</span>
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<span class="comment"> //var sld = wfsFeature.selectSingleNode("wmc:StyleList")</span>
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}
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}
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}
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}
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<span class="reserved">this</span>.addFirstListener(<span class="literal">"loadModel"</span>,<span class="reserved">this</span>.convertCoords,<span class="reserved">this</span>);
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<span class="reserved">if</span>( <span class="reserved">this</span>.containerModel ) <span class="reserved">this</span>.containerModel.addListener(<span class="literal">"loadModel"</span>,<span class="reserved">this</span>.loadWfsRequests,<span class="reserved">this</span>);
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<span class="comment">/**
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* Change a feature's visibility.
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* <span class="attrib">@param</span> featureName The name of the feature to set the hidden value for
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* <span class="attrib">@param</span> hidden, 1=hidden, 0=not hidden.
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*/</span>
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<span class="reserved">this</span>.setHidden=<span class="reserved">function</span>(featureName, hidden){
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<span class="reserved">this</span>.hidden = hidden;
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<span class="reserved">this</span>.callListeners(<span class="literal">"hidden"</span>, featureName);
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}
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<span class="comment">/**
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* Geta feature's visibility.
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* <span class="attrib">@param</span> featureName The name of the feature to set the hidden value for
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* <span class="attrib">@return</span> hidden value, true=hidden, false=not hidden.
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*/</span>
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<span class="reserved">this</span>.getHidden=<span class="reserved">function</span>(layerName){
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<span class="reserved">return</span> <span class="reserved">this</span>.hidden;
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}
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<span class="reserved">this</span>.hidden = false;
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<span class="comment">/**
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* Returns the list of nodes selected by the nodeSelectpath. These nodes
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* will be the individual feature members from the collection.
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* <span class="attrib">@return</span> list of nodes selected
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*/</span>
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<span class="reserved">this</span>.getFeatureNodes = <span class="reserved">function</span>() {
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<span class="reserved">return</span> <span class="reserved">this</span>.doc.selectNodes(<span class="reserved">this</span>.nodeSelectXpath);
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}
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<span class="comment">/**
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* Returns a label for a node in the feature list
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* <span class="attrib">@param</span> featureNode the feature node to selectfrom
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* <span class="attrib">@return</span> a label for this feature
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*/</span>
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<span class="reserved">this</span>.getFeatureName = <span class="reserved">function</span>(featureNode) {
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var labelNode = featureNode.selectSingleNode(<span class="reserved">this</span>.featureTagName); //TBD: set <span class="reserved">this</span> dynamically
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<span class="reserved">return</span> labelNode?getNodeValue(labelNode):mbGetMessage(<span class="literal">"noRssTitle"</span>);
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}
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<span class="comment">/**
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* Returns an ID value for a node in the feature list
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* <span class="attrib">@param</span> featureNode the feature node to selectfrom
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* <span class="attrib">@return</span> ID for this feature
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*/</span>
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<span class="reserved">this</span>.getFeatureId = <span class="reserved">function</span>(featureNode) {
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<span class="reserved">return</span> featureNode.getAttribute(<span class="literal">"fid"</span>)?featureNode.getAttribute(<span class="literal">"fid"</span>):<span class="literal">"no_id"</span>;
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}
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<span class="comment">/**
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* Returns a point geometry for the feature
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* <span class="attrib">@param</span> featureNode the feature node to select from
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* <span class="attrib">@return</span> the geometric point for the node
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*/</span>
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<span class="reserved">this</span>.getFeaturePoint = <span class="reserved">function</span>(featureNode) {
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var coords = featureNode.selectSingleNode(<span class="reserved">this</span>.coordSelectXpath);
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<span class="reserved">if</span> (coords) {
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var point = getNodeValue(coords).split(<span class="literal">','</span>);
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<span class="reserved">return</span> point
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} <span class="reserved">else</span> {
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<span class="reserved">return</span> new Array(0,0); //or some other error to <span class="reserved">return</span>?
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}
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}
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<span class="comment">/**
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* Returns a GML geometry for the feature
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* <span class="attrib">@param</span> featureNode the feature node to select from
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* <span class="attrib">@return</span> the GML for the node
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*/</span>
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<span class="reserved">this</span>.getFeatureGeometry = <span class="reserved">function</span>(featureNode) {
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var geometryTag = featureNode.selectSingleNode(<span class="reserved">this</span>.coordsTagName);
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<span class="reserved">if</span>( geometryTag != null )
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<span class="reserved">return</span> geometryTag.firstChild;
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<span class="reserved">else</span> {
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alert(mbGetMessage(<span class="literal">"invalidGeom"</span>, (new XMLSerializer()).serializeToString(featureNode)));
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}
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}
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}
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</pre>
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<hr>
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<!-- ========== START OF NAVBAR ========== -->
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<b><a href='http://mapbuilder.sourceforge.net'>Community Map Builder</a> 27 Apr 2008</b></em>
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if(window==top) {
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document.writeln('<A HREF="allclasses-noframe.html" TARGET=""><B>All Classes</B></A>');
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}
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//-->
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<div class="jsdoc_ctime">Documentation generated by <a href="http://jsdoc.sourceforge.net/" target="_parent">JSDoc</a> on Sun Apr 27 20:30:54 2008</div>
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