openlayers
Version:
Build tools and sources for developing OpenLayers based mapping applications
155 lines (127 loc) • 3.96 kB
JavaScript
goog.provide('ol.format.WMSGetFeatureInfo');
goog.require('ol');
goog.require('ol.array');
goog.require('ol.format.GML2');
goog.require('ol.format.XMLFeature');
goog.require('ol.obj');
goog.require('ol.xml');
/**
* @classdesc
* Format for reading WMSGetFeatureInfo format. It uses
* {@link ol.format.GML2} to read features.
*
* @constructor
* @extends {ol.format.XMLFeature}
* @param {olx.format.WMSGetFeatureInfoOptions=} opt_options Options.
* @api
*/
ol.format.WMSGetFeatureInfo = function(opt_options) {
var options = opt_options ? opt_options : {};
/**
* @private
* @type {string}
*/
this.featureNS_ = 'http://mapserver.gis.umn.edu/mapserver';
/**
* @private
* @type {ol.format.GML2}
*/
this.gmlFormat_ = new ol.format.GML2();
/**
* @private
* @type {Array.<string>}
*/
this.layers_ = options.layers ? options.layers : null;
ol.format.XMLFeature.call(this);
};
ol.inherits(ol.format.WMSGetFeatureInfo, ol.format.XMLFeature);
/**
* @const
* @type {string}
* @private
*/
ol.format.WMSGetFeatureInfo.featureIdentifier_ = '_feature';
/**
* @const
* @type {string}
* @private
*/
ol.format.WMSGetFeatureInfo.layerIdentifier_ = '_layer';
/**
* @param {Node} node Node.
* @param {Array.<*>} objectStack Object stack.
* @return {Array.<ol.Feature>} Features.
* @private
*/
ol.format.WMSGetFeatureInfo.prototype.readFeatures_ = function(node, objectStack) {
node.setAttribute('namespaceURI', this.featureNS_);
ol.DEBUG && console.assert(node.nodeType == Node.ELEMENT_NODE,
'node.nodeType should be ELEMENT');
var localName = node.localName;
/** @type {Array.<ol.Feature>} */
var features = [];
if (node.childNodes.length === 0) {
return features;
}
if (localName == 'msGMLOutput') {
for (var i = 0, ii = node.childNodes.length; i < ii; i++) {
var layer = node.childNodes[i];
if (layer.nodeType !== Node.ELEMENT_NODE) {
continue;
}
var context = objectStack[0];
ol.DEBUG && console.assert(layer.localName.indexOf(
ol.format.WMSGetFeatureInfo.layerIdentifier_) >= 0,
'localName of layer node should match layerIdentifier');
var toRemove = ol.format.WMSGetFeatureInfo.layerIdentifier_;
var layerName = layer.localName.replace(toRemove, '');
if (this.layers_ && !ol.array.includes(this.layers_, layerName)) {
continue;
}
var featureType = layerName +
ol.format.WMSGetFeatureInfo.featureIdentifier_;
context['featureType'] = featureType;
context['featureNS'] = this.featureNS_;
var parsers = {};
parsers[featureType] = ol.xml.makeArrayPusher(
this.gmlFormat_.readFeatureElement, this.gmlFormat_);
var parsersNS = ol.xml.makeStructureNS(
[context['featureNS'], null], parsers);
layer.setAttribute('namespaceURI', this.featureNS_);
var layerFeatures = ol.xml.pushParseAndPop(
[], parsersNS, layer, objectStack, this.gmlFormat_);
if (layerFeatures) {
ol.array.extend(features, layerFeatures);
}
}
}
if (localName == 'FeatureCollection') {
var gmlFeatures = ol.xml.pushParseAndPop([],
this.gmlFormat_.FEATURE_COLLECTION_PARSERS, node,
[{}], this.gmlFormat_);
if (gmlFeatures) {
features = gmlFeatures;
}
}
return features;
};
/**
* Read all features from a WMSGetFeatureInfo response.
*
* @function
* @param {Document|Node|Object|string} source Source.
* @param {olx.format.ReadOptions=} opt_options Options.
* @return {Array.<ol.Feature>} Features.
* @api stable
*/
ol.format.WMSGetFeatureInfo.prototype.readFeatures;
/**
* @inheritDoc
*/
ol.format.WMSGetFeatureInfo.prototype.readFeaturesFromNode = function(node, opt_options) {
var options = {};
if (opt_options) {
ol.obj.assign(options, this.getReadOptions(node, opt_options));
}
return this.readFeatures_(node, [options]);
};