Add write support for gml:MultiLineString

src/ol/format/gmlformat.js

@@ -1269,6 +1269,30 @@ ol.format.GML.writeMultiPoint_ = function(node, geometry,
 };
 
 
+/**
+ * @param {Node} node Node.
+ * @param {ol.geom.MultiLineString} geometry MultiLineString geometry.
+ * @param {Array.<*>} objectStack Node stack.
+ * @private
+ */
+ol.format.GML.writeMultiLineString_ = 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 lines = geometry.getLineStrings();
+  for (var i = 0, ii = lines.length; i < ii; ++i) {
+    ol.xml.pushSerializeAndPop({node: node, srsName: srsName},
+        ol.format.GML.LINESTRINGMEMBER_SERIALIZERS_,
+        ol.xml.makeSimpleNodeFactory('lineStringMember'), [lines[i]],
+        objectStack);
+  }
+};
+
+
 /**
  * @param {Node} node Node.
  * @param {ol.geom.LinearRing} ring LinearRing geometry.
@@ -1321,6 +1345,23 @@ ol.format.GML.writePointMember_ = function(node, point, objectStack) {
 };
 
 
+/**
+ * @param {Node} node Node.
+ * @param {ol.geom.LineString} line LineString geometry.
+ * @param {Array.<*>} objectStack Node stack.
+ * @private
+ */
+ol.format.GML.writeLineStringMember_ = function(node, line, 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_, [line], []);
+};
+
+
 /**
  * @param {Node} node Node.
  * @param {ol.geom.Polygon} polygon Polygon geometry.
@@ -1377,6 +1418,18 @@ ol.format.GML.POINTMEMBER_SERIALIZERS_ = {
 };
 
 
+/**
+ * @type {Object.<string, Object.<string, ol.xml.Serializer>>}
+ * @private
+ */
+ol.format.GML.LINESTRINGMEMBER_SERIALIZERS_ = {
+  'http://www.opengis.net/gml': {
+    'lineStringMember': ol.xml.makeChildAppender(
+        ol.format.GML.writeLineStringMember_)
+  }
+};
+
+
 /**
  * @type {Object.<string, Object.<string, ol.xml.Serializer>>}
  * @private
@@ -1444,6 +1497,8 @@ ol.format.GML.GEOMETRY_SERIALIZERS_ = {
     'Point': ol.xml.makeChildAppender(ol.format.GML.writePoint_),
     'MultiPoint': ol.xml.makeChildAppender(ol.format.GML.writeMultiPoint_),
     'LineString': ol.xml.makeChildAppender(ol.format.GML.writeLineString_),
+    'MultiLineString': ol.xml.makeChildAppender(
+        ol.format.GML.writeMultiLineString_),
     'LinearRing': ol.xml.makeChildAppender(ol.format.GML.writeLinearRing_),
     'Polygon': ol.xml.makeChildAppender(ol.format.GML.writePolygon_),
     'Surface': ol.xml.makeChildAppender(ol.format.GML.writeSurface_),

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

@@ -306,7 +306,7 @@ describe('ol.format.GML', function() {
 
     describe('multilinestring', function() {
 
-      it('can read a singular multilinestring geometry', function() {
+      it('can read and write a singular multilinestring geometry', function() {
         var text =
             '<gml:MultiLineString xmlns:gml="http://www.opengis.net/gml" ' +
             '    srsName="CRS:84">' +
@@ -325,6 +325,8 @@ describe('ol.format.GML', function() {
         expect(g).to.be.an(ol.geom.MultiLineString);
         expect(g.getCoordinates()).to.eql(
             [[[1, 2, 0], [2, 3, 0]], [[3, 4, 0], [4, 5, 0]]]);
+        var serialized = format.writeGeometry(g);
+        expect(serialized.firstElementChild).to.xmleql(ol.xml.load(text));
       });
 
       it('can read a plural multilinestring geometry', function() {