GML parser.

This adds a parser (read/write) for GML v2 and v3. GML v3 is limited to the simple features profile of GML 3.1.1, just like OpenLayers 2 was. This will be the basis for the WFS parser, but it only makes sense to continue this work once feature modification (insert, update, delete) is in place in ol3. So the WFS parser will be another pull request.
2013-05-13 10:23:19 +02:00
parent 42cc4d7683
commit 5ad4734c24
55 changed files with 2679 additions and 0 deletions
@@ -0,0 +1,122 @@
+goog.provide('ol.parser.ogc.GML_v2');
+
+goog.require('goog.dom.xml');
+goog.require('goog.object');
+goog.require('ol.parser.ogc.GML');
+
+
+
+/**
+ * @constructor
+ * @param {ol.parser.GML2Options=} opt_options Optional configuration object.
+ * @extends {ol.parser.ogc.GML}
+ */
+ol.parser.ogc.GML_v2 = function(opt_options) {
+  this.schemaLocation = 'http://www.opengis.net/gml ' +
+      'http://schemas.opengis.net/gml/2.1.2/feature.xsd';
+  goog.base(this, opt_options);
+  goog.object.extend(this.readers['http://www.opengis.net/gml'], {
+    'outerBoundaryIs': function(node, container) {
+      var coordinates = [];
+      this.readChildNodes(node, coordinates);
+      container['outer'] = coordinates[0][0];
+    },
+    'innerBoundaryIs': function(node, container) {
+      var coordinates = [];
+      this.readChildNodes(node, coordinates);
+      container.inner.push(coordinates[0][0]);
+    },
+    'Box': function(node, container) {
+      var coordinates = [];
+      this.readChildNodes(node, coordinates);
+      container.bounds = [coordinates[0][0][0], coordinates[0][1][0],
+        coordinates[0][0][1], coordinates[0][1][1]];
+    }
+  });
+  goog.object.extend(this.writers['http://www.opengis.net/gml'], {
+    'Point': function(geometry) {
+      var node = this.createElementNS('gml:Point');
+      this.writeNode('coordinates', [geometry.getCoordinates()], null, node);
+      return node;
+    },
+    'coordinates': function(coordinates) {
+      var numCoordinates = coordinates.length;
+      var parts = new Array(numCoordinates);
+      for (var i = 0; i < numCoordinates; ++i) {
+        var coord = coordinates[i];
+        var str = '';
+        if (this.xy) {
+          str += coord[0] + ',' + coord[1];
+        } else {
+          str += coord[1] + ',' + coord[0];
+        }
+        if (coord.length === 3) {
+          str += ',' + coord[2];
+        }
+        parts[i] = str;
+      }
+      var value = (numCoordinates === 1) ? parts[0] : parts.join(' ');
+      var node = this.createElementNS('gml:coordinates');
+      this.setAttributeNS(node, null, 'decimal', '.');
+      this.setAttributeNS(node, null, 'cs', ',');
+      this.setAttributeNS(node, null, 'ts', ' ');
+      node.appendChild(this.createTextNode(value));
+      return node;
+    },
+    'LineString': function(geometry) {
+      var node = this.createElementNS('gml:LineString');
+      this.writeNode('coordinates', geometry.getCoordinates(), null, node);
+      return node;
+    },
+    'Polygon': function(geometry) {
+      var node = this.createElementNS('gml:Polygon');
+      var coordinates = geometry.getCoordinates();
+      this.writeNode('outerBoundaryIs', coordinates[0], null, node);
+      for (var i = 1; i < coordinates.length; ++i) {
+        this.writeNode('innerBoundaryIs', coordinates[i], null, node);
+      }
+      return node;
+    },
+    'outerBoundaryIs': function(ring) {
+      var node = this.createElementNS('gml:outerBoundaryIs');
+      this.writeNode('LinearRing', ring, null, node);
+      return node;
+    },
+    'innerBoundaryIs': function(ring) {
+      var node = this.createElementNS('gml:innerBoundaryIs');
+      this.writeNode('LinearRing', ring, null, node);
+      return node;
+    },
+    'LinearRing': function(ring) {
+      var node = this.createElementNS('gml:LinearRing');
+      this.writeNode('coordinates', ring, null, node);
+      return node;
+    },
+    'Box': function(extent) {
+      var node = this.createElementNS('gml:Box');
+      this.writeNode('coordinates', [[extent.minX, extent.minY],
+            [extent.maxX, extent.maxY]], null, node);
+      // srsName attribute is optional for gml:Box
+      if (goog.isDef(this.srsName)) {
+        // TODO setAttribute or this.setAttributeNS
+        node.setAttribute('srsName', this.srsName);
+      }
+      return node;
+    }
+  });
+};
+goog.inherits(ol.parser.ogc.GML_v2, ol.parser.ogc.GML);
+
+
+/**
+ * @param {Object} obj Object structure to write out as XML.
+ * @return {string} An string representing the XML document.
+ */
+ol.parser.ogc.GML_v2.prototype.write = function(obj) {
+  var root = this.writeNode('FeatureCollection', obj.features,
+      'http://www.opengis.net/wfs');
+  this.setAttributeNS(
+      root, 'http://www.w3.org/2001/XMLSchema-instance',
+      'xsi:schemaLocation', this.schemaLocation);
+  return this.serialize(root);
+};