Add write support for gml:MultiPoint

src/ol/format/gmlformat.js

@@ -1102,7 +1102,8 @@ ol.format.GML.writePoint_ = function(node, geometry, objectStack) {
   var context = objectStack[objectStack.length - 1];
   goog.asserts.assert(goog.isObject(context));
   var srsName = goog.object.get(context, 'srsName');
-  if (goog.isDefAndNotNull(srsName)) {
+  var writeSrsName = goog.object.get(context, 'writeSrsName');
+  if (goog.isDefAndNotNull(srsName) && writeSrsName !== false) {
     node.setAttribute('srsName', srsName);
   }
   ol.xml.pushSerializeAndPop({node: node, srsName: srsName},
@@ -1244,6 +1245,30 @@ ol.format.GML.writeMultiSurface_ = function(node, geometry,
 };
 
 
+/**
+ * @param {Node} node Node.
+ * @param {ol.geom.MultiPoint} geometry MultiPoint geometry.
+ * @param {Array.<*>} objectStack Node stack.
+ * @private
+ */
+ol.format.GML.writeMultiPoint_ = function(node, geometry,
+    objectStack) {
+  var context = objectStack[objectStack.length - 1];
+  goog.asserts.assert(goog.isObject(context));
+  var srsName = goog.object.get(context, 'srsName');
+  if (goog.isDefAndNotNull(srsName)) {
+    node.setAttribute('srsName', srsName);
+  }
+  var points = geometry.getPoints();
+  for (var i = 0, ii = points.length; i < ii; ++i) {
+    ol.xml.pushSerializeAndPop({node: node, srsName: srsName},
+        ol.format.GML.POINTMEMBER_SERIALIZERS_,
+        ol.xml.makeSimpleNodeFactory('pointMember'), [points[i]],
+        objectStack);
+  }
+};
+
+
 /**
  * @param {Node} node Node.
  * @param {ol.geom.LinearRing} ring LinearRing geometry.
@@ -1279,6 +1304,23 @@ ol.format.GML.writeSurfaceMember_ = function(node, polygon, objectStack) {
 };
 
 
+/**
+ * @param {Node} node Node.
+ * @param {ol.geom.Point} point Point geometry.
+ * @param {Array.<*>} objectStack Node stack.
+ * @private
+ */
+ol.format.GML.writePointMember_ = function(node, point, objectStack) {
+  var context = objectStack[objectStack.length - 1];
+  goog.asserts.assert(goog.isObject(context));
+  var srsName = goog.object.get(context, 'srsName');
+  ol.xml.pushSerializeAndPop(/** @type {ol.xml.NodeStackItem} */
+      ({node: node, srsName: srsName, writeSrsName: false}),
+      ol.format.GML.GEOMETRY_SERIALIZERS_,
+      ol.format.GML.GEOMETRY_NODE_FACTORY_, [point], []);
+};
+
+
 /**
  * @param {Node} node Node.
  * @param {ol.geom.Polygon} polygon Polygon geometry.
@@ -1324,6 +1366,17 @@ ol.format.GML.SURFACEMEMBER_SERIALIZERS_ = {
 };
 
 
+/**
+ * @type {Object.<string, Object.<string, ol.xml.Serializer>>}
+ * @private
+ */
+ol.format.GML.POINTMEMBER_SERIALIZERS_ = {
+  'http://www.opengis.net/gml': {
+    'pointMember': ol.xml.makeChildAppender(ol.format.GML.writePointMember_)
+  }
+};
+
+
 /**
  * @type {Object.<string, Object.<string, ol.xml.Serializer>>}
  * @private
@@ -1389,6 +1442,7 @@ ol.format.GML.GEOMETRY_SERIALIZERS_ = {
   'http://www.opengis.net/gml': {
     'Curve': ol.xml.makeChildAppender(ol.format.GML.writeCurve_),
     'Point': ol.xml.makeChildAppender(ol.format.GML.writePoint_),
+    'MultiPoint': ol.xml.makeChildAppender(ol.format.GML.writeMultiPoint_),
     'LineString': ol.xml.makeChildAppender(ol.format.GML.writeLineString_),
     'LinearRing': ol.xml.makeChildAppender(ol.format.GML.writeLinearRing_),
     'Polygon': ol.xml.makeChildAppender(ol.format.GML.writePolygon_),

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

@@ -254,7 +254,7 @@ describe('ol.format.GML', function() {
 
     describe('multipoint', function() {
 
-      it('can read a singular multipoint geometry', function() {
+      it('can read and write a singular multipoint geometry', function() {
         var text =
             '<gml:MultiPoint xmlns:gml="http://www.opengis.net/gml" ' +
             '    srsName="CRS:84">' +
@@ -277,6 +277,8 @@ describe('ol.format.GML', function() {
         var g = readGeometry(format, text);
         expect(g).to.be.an(ol.geom.MultiPoint);
         expect(g.getCoordinates()).to.eql([[1, 2, 0], [2, 3, 0], [3, 4, 0]]);
+        var serialized = format.writeGeometry(g);
+        expect(serialized.firstElementChild).to.xmleql(ol.xml.load(text));
       });
 
       it('can read a plural multipoint geometry', function() {