add an optional argument to getAttributes so we can get a feature's attributes except for the geometry ones

src/ol/feature.js

@@ -68,17 +68,23 @@ goog.inherits(ol.Feature, ol.Object);
 
 /**
  * Gets a copy of the attributes of this feature.
+ * @param {boolean=} opt_nonGeometry Don't include any geometry attributes
+ *     (by default geometry attributes are returned).
  * @return {Object.<string, *>} Attributes object.
  * @todo stability experimental
  */
-ol.Feature.prototype.getAttributes = function() {
+ol.Feature.prototype.getAttributes = function(opt_nonGeometry) {
   var keys = this.getKeys(),
       len = keys.length,
       attributes = {},
       i, key;
   for (i = 0; i < len; ++ i) {
     key = keys[i];
-    attributes[key] = this.get(key);
+    var value = this.get(key);
+    if (!goog.isDef(opt_nonGeometry) || opt_nonGeometry == false ||
+        (opt_nonGeometry === true && !(value instanceof ol.geom.Geometry))) {
+      attributes[key] = value;
+    }
   }
   return attributes;
 };

src/ol/parser/geojsonparser.js

@@ -351,11 +351,7 @@ ol.parser.GeoJSON.prototype.encodeFeatureCollection_ = function(collection) {
  */
 ol.parser.GeoJSON.prototype.encodeFeature_ = function(feature) {
   var geometry = feature.getGeometry(),
-      attributes = feature.getAttributes();
-  var properties = goog.object.filter(attributes,
-      function(element, index, array) {
-        return !(element instanceof ol.geom.Geometry);
-      });
+      properties = feature.getAttributes(true);
   return /** @type {GeoJSONFeature} */({
     type: 'Feature',
     properties: properties,

src/ol/parser/ogc/gmlparser.js

@@ -422,11 +422,10 @@ ol.parser.ogc.GML = function(opt_options) {
         this.writeNode('_geometry', feature.getGeometry(), this.featureNS,
             node);
       }
-      var attributes = feature.getAttributes();
+      var attributes = feature.getAttributes(true);
       for (var name in attributes) {
         var value = attributes[name];
-        if (goog.isDefAndNotNull(value) && !(value instanceof
-            ol.geom.Geometry)) {
+        if (goog.isDefAndNotNull(value)) {
           this.writeNode('_attribute', {name: name, value: value},
               this.featureNS, node);
         }

test/spec/ol/feature.test.js

@@ -78,6 +78,23 @@ describe('ol.Feature', function() {
       expect(attributes.ten).to.be(10);
     });
 
+    it('returns an object with all attributes except geometry', function() {
+      var point = new ol.geom.Point([15, 30]);
+      var feature = new ol.Feature({
+        foo: 'bar',
+        ten: 10,
+        loc: point
+      });
+
+      var attributes = feature.getAttributes(true);
+
+      var keys = goog.object.getKeys(attributes);
+      expect(keys.sort()).to.eql(['foo', 'ten']);
+
+      expect(attributes.foo).to.be('bar');
+      expect(attributes.ten).to.be(10);
+    });
+
   });