Merge pull request #6614 from adube/filter-write-util-method

Filter write util method

src/ol/format/wfs.js

@@ -782,6 +782,20 @@ ol.format.WFS.GETFEATURE_SERIALIZERS_ = {
 };
 
 
+/**
+ * Encode filter as WFS `Filter` and return the Node.
+ *
+ * @param {ol.format.filter.Filter} filter Filter.
+ * @return {Node} Result.
+ * @api
+ */
+ol.format.WFS.writeFilter = function(filter) {
+  var child = ol.xml.createElementNS(ol.format.WFS.OGCNS, 'Filter');
+  ol.format.WFS.writeFilterCondition_(child, filter, []);
+  return child;
+};
+
+
 /**
  * @param {Node} node Node.
  * @param {Array.<string>} featureTypes Feature types.

test/spec/ol/format/wfs.test.js

@@ -1014,4 +1014,29 @@ describe('ol.format.WFS', function() {
 
   });
 
+  describe('when writing out a WFS Filter', function() {
+    it('creates a filter', function() {
+      var text =
+          '<Filter xmlns="http://www.opengis.net/ogc">' +
+          '  <And>' +
+          '    <PropertyIsLike wildCard="*" singleChar="." escapeChar="!">' +
+          '      <PropertyName>name</PropertyName>' +
+          '      <Literal>Mississippi*</Literal>' +
+          '    </PropertyIsLike>' +
+          '    <PropertyIsEqualTo>' +
+          '      <PropertyName>waterway</PropertyName>' +
+          '      <Literal>riverbank</Literal>' +
+          '    </PropertyIsEqualTo>' +
+          '  </And>' +
+          '</Filter>';
+      var serialized = ol.format.WFS.writeFilter(
+        ol.format.filter.and(
+          ol.format.filter.like('name', 'Mississippi*'),
+          ol.format.filter.equalTo('waterway', 'riverbank')
+        )
+      );
+      expect(serialized).to.xmleql(ol.xml.parse(text));
+    });
+  });
+
 });