Add ol.format.GeoJSON
This commit is contained in:
Tom Payne
@@ -247,7 +247,7 @@
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/**
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* @typedef {Object} ol.format.GeoJSONOptions
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* @property {ol.proj.ProjectionLike} projection Projection.
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* @property {ol.proj.ProjectionLike} defaultProjection Default projection.
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*/
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/**
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1
src/ol/format/geojsonformat.exports
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1
src/ol/format/geojsonformat.exports
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@@ -0,0 +1 @@
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@exportClass ol.format.GeoJSON ol.format.GeoJSONOptions
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365
src/ol/format/geojsonformat.js
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365
src/ol/format/geojsonformat.js
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@@ -0,0 +1,365 @@
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// FIXME coordinate order
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// FIXME reprojection
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// FIXME GeometryCollection
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goog.provide('ol.format.GeoJSON');
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goog.require('goog.asserts');
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goog.require('goog.object');
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goog.require('ol.Feature');
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goog.require('ol.format.JSON');
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goog.require('ol.geom.LineString');
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goog.require('ol.geom.MultiLineString');
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goog.require('ol.geom.MultiPoint');
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goog.require('ol.geom.MultiPolygon');
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goog.require('ol.geom.Point');
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goog.require('ol.geom.Polygon');
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goog.require('ol.proj');
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/**
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* @constructor
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* @extends {ol.format.JSON}
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* @param {ol.format.GeoJSONOptions=} opt_options Options.
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*/
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ol.format.GeoJSON = function(opt_options) {
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var options = goog.isDef(opt_options) ? opt_options : {};
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goog.base(this);
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/**
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* @private
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* @type {ol.proj.Projection}
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*/
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this.defaultProjection_ = ol.proj.get(options.defaultProjection ?
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options.defaultProjection : 'EPSG:4326');
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};
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goog.inherits(ol.format.GeoJSON, ol.format.JSON);
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/**
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* @param {GeoJSONGeometry} object Object.
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* @private
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* @return {ol.geom.Geometry} Geometry.
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*/
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ol.format.GeoJSON.readGeometry_ = function(object) {
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var geometryReader = ol.format.GeoJSON.GEOMETRY_READERS_[object.type];
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goog.asserts.assert(goog.isDef(geometryReader));
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return geometryReader(object);
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};
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/**
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* @param {GeoJSONGeometry} object Object.
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* @private
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* @return {ol.geom.Point} Point.
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*/
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ol.format.GeoJSON.readPointGeometry_ = function(object) {
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goog.asserts.assert(object.type == 'Point');
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return new ol.geom.Point(object.coordinates);
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};
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/**
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* @param {GeoJSONGeometry} object Object.
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* @private
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* @return {ol.geom.LineString} LineString.
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*/
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ol.format.GeoJSON.readLineStringGeometry_ = function(object) {
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goog.asserts.assert(object.type == 'LineString');
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return new ol.geom.LineString(object.coordinates);
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};
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/**
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* @param {GeoJSONGeometry} object Object.
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* @private
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* @return {ol.geom.MultiLineString} MultiLineString.
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*/
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ol.format.GeoJSON.readMultiLineStringGeometry_ = function(object) {
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goog.asserts.assert(object.type == 'MultiLineString');
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return new ol.geom.MultiLineString(object.coordinates);
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};
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/**
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* @param {GeoJSONGeometry} object Object.
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* @private
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* @return {ol.geom.MultiPoint} MultiPoint.
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*/
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ol.format.GeoJSON.readMultiPointGeometry_ = function(object) {
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goog.asserts.assert(object.type == 'MultiPoint');
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return new ol.geom.MultiPoint(object.coordinates);
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};
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/**
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* @param {GeoJSONGeometry} object Object.
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* @private
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* @return {ol.geom.MultiPolygon} MultiPolygon.
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*/
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ol.format.GeoJSON.readMultiPolygonGeometry_ = function(object) {
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goog.asserts.assert(object.type == 'MultiPolygon');
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return new ol.geom.MultiPolygon(object.coordinates);
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};
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/**
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* @param {GeoJSONGeometry} object Object.
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* @private
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* @return {ol.geom.Polygon} Polygon.
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*/
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ol.format.GeoJSON.readPolygonGeometry_ = function(object) {
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goog.asserts.assert(object.type == 'Polygon');
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return new ol.geom.Polygon(object.coordinates);
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};
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/**
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* @param {ol.geom.Geometry} geometry Geometry.
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* @private
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* @return {GeoJSONGeometry} GeoJSON geometry.
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*/
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ol.format.GeoJSON.writeGeometry_ = function(geometry) {
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var geometryWriter = ol.format.GeoJSON.GEOMETRY_WRITERS_[geometry.getType()];
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goog.asserts.assert(goog.isDef(geometryWriter));
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return geometryWriter(geometry);
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};
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/**
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* @param {ol.geom.Geometry} geometry Geometry.
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* @private
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* @return {GeoJSONGeometry} GeoJSON geometry.
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*/
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ol.format.GeoJSON.writeLineStringGeometry_ = function(geometry) {
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goog.asserts.assertInstanceof(geometry, ol.geom.LineString);
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return /** @type {GeoJSONGeometry} */ ({
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'type': 'LineString',
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'coordinates': geometry.getCoordinates()
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});
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};
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/**
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* @param {ol.geom.Geometry} geometry Geometry.
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* @private
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* @return {GeoJSONGeometry} GeoJSON geometry.
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*/
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ol.format.GeoJSON.writeMultiLineStringGeometry_ = function(geometry) {
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goog.asserts.assertInstanceof(geometry, ol.geom.MultiLineString);
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goog.asserts.assert(
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geometry.getType() == ol.geom.GeometryType.MULTI_LINE_STRING);
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return /** @type {GeoJSONGeometry} */ ({
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'type': 'MultiLineString',
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'coordinates': geometry.getCoordinates()
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});
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};
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/**
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* @param {ol.geom.Geometry} geometry Geometry.
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* @private
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* @return {GeoJSONGeometry} GeoJSON geometry.
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*/
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ol.format.GeoJSON.writeMultiPointGeometry_ = function(geometry) {
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goog.asserts.assertInstanceof(geometry, ol.geom.MultiPoint);
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return /** @type {GeoJSONGeometry} */ ({
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'type': 'MultiPoint',
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'coordinates': geometry.getCoordinates()
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});
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};
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/**
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* @param {ol.geom.Geometry} geometry Geometry.
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* @private
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* @return {GeoJSONGeometry} GeoJSON geometry.
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*/
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ol.format.GeoJSON.writeMultiPolygonGeometry_ = function(geometry) {
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goog.asserts.assertInstanceof(geometry, ol.geom.MultiPolygon);
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return /** @type {GeoJSONGeometry} */ ({
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'type': 'MultiPolygon',
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'coordinates': geometry.getCoordinates()
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});
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};
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/**
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* @param {ol.geom.Geometry} geometry Geometry.
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* @private
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* @return {GeoJSONGeometry} GeoJSON geometry.
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*/
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ol.format.GeoJSON.writePointGeometry_ = function(geometry) {
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goog.asserts.assertInstanceof(geometry, ol.geom.Point);
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return /** @type {GeoJSONGeometry} */ ({
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'type': 'Point',
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'coordinates': geometry.getCoordinates()
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});
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};
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/**
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* @param {ol.geom.Geometry} geometry Geometry.
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* @private
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* @return {GeoJSONGeometry} GeoJSON geometry.
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*/
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ol.format.GeoJSON.writePolygonGeometry_ = function(geometry) {
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goog.asserts.assertInstanceof(geometry, ol.geom.Polygon);
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return /** @type {GeoJSONGeometry} */ ({
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'type': 'Polygon',
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'coordinates': geometry.getCoordinates()
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});
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};
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/**
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* @const
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* @private
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* @type {Object.<string, function(GeoJSONGeometry): ol.geom.Geometry>}
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*/
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ol.format.GeoJSON.GEOMETRY_READERS_ = {
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'Point': ol.format.GeoJSON.readPointGeometry_,
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'LineString': ol.format.GeoJSON.readLineStringGeometry_,
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'Polygon': ol.format.GeoJSON.readPolygonGeometry_,
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'MultiPoint': ol.format.GeoJSON.readMultiPointGeometry_,
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'MultiLineString': ol.format.GeoJSON.readMultiLineStringGeometry_,
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'MultiPolygon': ol.format.GeoJSON.readMultiPolygonGeometry_
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};
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/**
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* @const
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* @private
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* @type {Object.<string, function(ol.geom.Geometry): GeoJSONGeometry>}
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*/
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ol.format.GeoJSON.GEOMETRY_WRITERS_ = {
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'Point': ol.format.GeoJSON.writePointGeometry_,
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'LineString': ol.format.GeoJSON.writeLineStringGeometry_,
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'Polygon': ol.format.GeoJSON.writePolygonGeometry_,
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'MultiPoint': ol.format.GeoJSON.writeMultiPointGeometry_,
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'MultiLineString': ol.format.GeoJSON.writeMultiLineStringGeometry_,
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'MultiPolygon': ol.format.GeoJSON.writeMultiPolygonGeometry_
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};
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/**
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* @inheritDoc
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*/
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ol.format.GeoJSON.prototype.readFeatureFromObject = function(object) {
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var geoJSONFeature = /** @type {GeoJSONFeature} */ (object);
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goog.asserts.assert(geoJSONFeature.type == 'Feature');
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var geometry = ol.format.GeoJSON.readGeometry_(geoJSONFeature.geometry);
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var feature = new ol.Feature(geometry);
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if (goog.isDef(geoJSONFeature.id)) {
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feature.setId(geoJSONFeature.id);
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}
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if (goog.isDef(geoJSONFeature.properties)) {
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feature.setValues(geoJSONFeature.properties);
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}
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return feature;
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};
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/**
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* @inheritDoc
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*/
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ol.format.GeoJSON.prototype.readFeaturesFromObject = function(object) {
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var geoJSONObject = /** @type {GeoJSONObject} */ (object);
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if (geoJSONObject.type == 'Feature') {
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return [this.readFeatureFromObject(object)];
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} else if (geoJSONObject.type == 'FeatureCollection') {
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var geoJSONFeatureCollection = /** @type {GeoJSONFeatureCollection} */
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(object);
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/** @type {Array.<ol.Feature>} */
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var features = [];
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var geoJSONFeatures = geoJSONFeatureCollection.features;
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var i, ii;
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for (i = 0, ii = geoJSONFeatures.length; i < ii; ++i) {
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features.push(this.readFeatureFromObject(geoJSONFeatures[i]));
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}
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return features;
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} else {
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goog.asserts.fail();
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return null;
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}
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};
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/**
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* @inheritDoc
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*/
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ol.format.GeoJSON.prototype.readGeometryFromObject = function(object) {
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return ol.format.GeoJSON.readGeometry_(
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/** @type {GeoJSONGeometry} */ (object));
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};
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/**
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* @inheritDoc
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*/
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ol.format.GeoJSON.prototype.readProjection = function(object) {
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var geoJSONObject = /** @type {GeoJSONObject} */ (object);
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var crs = geoJSONObject.crs;
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if (goog.isDefAndNotNull(crs)) {
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if (crs.type == 'name') {
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return ol.proj.get(crs.properties.name);
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} else {
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goog.asserts.fail();
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return null;
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}
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} else {
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return this.defaultProjection_;
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}
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};
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/**
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* @inheritDoc
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*/
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ol.format.GeoJSON.prototype.writeFeatureObject = function(feature) {
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var object = {
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'type': 'Feature'
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};
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var id = feature.getId();
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if (goog.isDefAndNotNull(id)) {
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goog.object.set(object, 'id', id);
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}
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var geometry = feature.getGeometry();
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if (goog.isDefAndNotNull(geometry)) {
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goog.object.set(
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object, 'geometry', ol.format.GeoJSON.writeGeometry_(geometry));
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}
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var properties = feature.getProperties();
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goog.object.remove(properties, 'geometry');
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if (!goog.object.isEmpty(properties)) {
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goog.object.set(object, 'properties', properties);
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}
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return object;
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};
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/**
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* @inheritDoc
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*/
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ol.format.GeoJSON.prototype.writeFeaturesObject = function(features) {
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var objects = [];
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var i, ii;
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for (i = 0, ii = features.length; i < ii; ++i) {
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objects.push(this.writeFeatureObject(features[i]));
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}
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return /** @type {GeoJSONFeatureCollection} */ ({
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'type': 'FeatureCollection',
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'features': objects
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});
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};
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/**
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* @inheritDoc
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*/
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ol.format.GeoJSON.prototype.writeGeometryObject =
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ol.format.GeoJSON.writeGeometry_;
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