Add feature id (fid) parsing

src/ol/format/gmlformat.js

@@ -123,6 +123,8 @@ ol.format.GML.readGeometry_ = function(node, objectStack) {
  */
 ol.format.GML.readFeature_ = function(node, objectStack) {
   var n;
+  var fid = node.getAttribute('fid') ||
+      ol.xml.getAttributeNS(node, 'http://www.opengis.net/gml', 'id');
   var values = {}, geometryName;
   for (n = node.firstElementChild; !goog.isNull(n);
       n = n.nextElementSibling) {
@@ -145,6 +147,9 @@ ol.format.GML.readFeature_ = function(node, objectStack) {
   if (goog.isDef(geometryName)) {
     feature.setGeometryName(geometryName);
   }
+  if (!goog.isNull(fid)) {
+    feature.setId(fid);
+  }
   return feature;
 };
 
@@ -165,8 +170,6 @@ ol.format.GML.readPoint_ = function(node, objectStack) {
     goog.asserts.assert(flatCoordinates.length == 3);
     point.setFlatCoordinates(ol.geom.GeometryLayout.XYZ, flatCoordinates);
     return point;
-  } else {
-    return undefined;
   }
 };
 
@@ -185,8 +188,6 @@ ol.format.GML.readMultiPoint_ = function(node, objectStack) {
       ol.format.GML.MULTIPOINT_PARSERS_, node, objectStack);
   if (goog.isDefAndNotNull(coordinates)) {
     return new ol.geom.MultiPoint(coordinates);
-  } else {
-    return undefined;
   }
 };
 
@@ -652,7 +653,7 @@ ol.format.GML.readFlatPos_ = function(node, objectStack) {
   goog.asserts.assert(goog.isObject(context));
   var containerSrs = goog.object.get(context, 'srsName');
   var axisOrientation = 'enu';
-  if (containerSrs !== null) {
+  if (!goog.isNull(containerSrs)) {
     var proj = ol.proj.get(containerSrs);
     axisOrientation = proj.getAxisOrientation();
   }
@@ -683,7 +684,7 @@ ol.format.GML.readFlatPosList_ = function(node, objectStack) {
   var containerSrs = goog.object.get(context, 'srsName');
   var containerDimension = node.parentNode.getAttribute('srsDimension');
   var axisOrientation = 'enu';
-  if (containerSrs !== null) {
+  if (!goog.isNull(containerSrs)) {
     var proj = ol.proj.get(containerSrs);
     axisOrientation = proj.getAxisOrientation();
   }
@@ -691,7 +692,7 @@ ol.format.GML.readFlatPosList_ = function(node, objectStack) {
   // The "dimension" attribute is from the GML 3.0.1 spec.
   var dim = parseInt(node.getAttribute('srsDimension') ||
       node.getAttribute('dimension'), 10) ||
-      (containerDimension !== null) ?
+      (!goog.isNull(containerDimension)) ?
       parseInt(containerDimension, 10) : 2;
   var x, y, z;
   var flatCoordinates = [];

src/ol/xml.js

@@ -201,6 +201,95 @@ ol.xml.isNodeIE_ = function(value) {
 ol.xml.isNode = goog.userAgent.IE ? ol.xml.isNodeIE_ : ol.xml.isNode_;
 
 
+/**
+ * @param {Node} node Node.
+ * @param {?string} namespaceURI Namespace URI.
+ * @param {string} name Attribute name.
+ * @return {string} Value
+ * @private
+ */
+ol.xml.getAttributeNS_ = function(node, namespaceURI, name) {
+  return node.getAttributeNS(namespaceURI, name) || '';
+};
+
+
+/**
+ * @param {Node} node Node.
+ * @param {?string} namespaceURI Namespace URI.
+ * @param {string} name Attribute name.
+ * @return {string} Value
+ * @private
+ */
+ol.xml.getAttributeNSActiveX_ = function(node, namespaceURI, name) {
+  var attributeValue = '';
+  var attributeNode = ol.xml.getAttributeNodeNS(node, namespaceURI, name);
+  if (goog.isDef(attributeNode)) {
+    attributeValue = attributeNode.nodeValue;
+  }
+  return attributeValue;
+};
+
+
+/**
+ * @param {Node} node Node.
+ * @param {?string} namespaceURI Namespace URI.
+ * @param {string} name Attribute name.
+ * @return {string} Value
+ */
+ol.xml.getAttributeNS =
+    (document.implementation && document.implementation.createDocument) ?
+        ol.xml.getAttributeNS_ : ol.xml.getAttributeNSActiveX_;
+
+
+/**
+ * @param {Node} node Node.
+ * @param {?string} namespaceURI Namespace URI.
+ * @param {string} name Attribute name.
+ * @return {?Node} Attribute node or null if none found.
+ * @private
+ */
+ol.xml.getAttributeNodeNS_ = function(node, namespaceURI, name) {
+  return node.getAttributeNodeNS(namespaceURI, name);
+};
+
+
+/**
+ * @param {Node} node Node.
+ * @param {?string} namespaceURI Namespace URI.
+ * @param {string} name Attribute name.
+ * @return {?Node} Attribute node or null if none found.
+ * @private
+ */
+ol.xml.getAttributeNodeNSActiveX_ = function(node, namespaceURI, name) {
+  var attributeNode = null;
+  var attributes = node.attributes;
+  var potentialNode, fullName;
+  for (var i = 0, len = attributes.length; i < len; ++i) {
+    potentialNode = attributes[i];
+    if (potentialNode.namespaceURI == namespaceURI) {
+      fullName = (potentialNode.prefix) ?
+          (potentialNode.prefix + ':' + name) : name;
+      if (fullName == potentialNode.nodeName) {
+        attributeNode = potentialNode;
+        break;
+      }
+    }
+  }
+  return attributeNode;
+};
+
+
+/**
+ * @param {Node} node Node.
+ * @param {?string} namespaceURI Namespace URI.
+ * @param {string} name Attribute name.
+ * @return {?Node} Attribute node or null if none found.
+ */
+ol.xml.getAttributeNodeNS =
+    (document.implementation && document.implementation.createDocument) ?
+        ol.xml.getAttributeNodeNS_ : ol.xml.getAttributeNodeNSActiveX_;
+
+
 /**
  * @param {Node} node Node.
  * @param {?string} namespaceURI Namespace URI.

test/spec/ol/format/gmlformat.test.js

@@ -652,6 +652,10 @@ describe('ol.format.GML', function() {
       expect(features).to.have.length(10);
     });
 
+    it('creates the right id for the feature', function() {
+      expect(features[0].getId()).to.equal('states.1');
+    });
+
   });
 
   describe('when parsing TOPP states GML from WFS', function() {
@@ -678,6 +682,7 @@ describe('ol.format.GML', function() {
 
     it('creates a polygon for Illinois', function() {
       feature = features[0];
+      expect(feature.getId()).to.equal('states.1');
       expect(feature.get('STATE_NAME')).to.equal('Illinois');
       expect(feature.getGeometry()).to.be.an(ol.geom.MultiPolygon);
     });