165 lines
3.9 KiB
JavaScript
165 lines
3.9 KiB
JavaScript
goog.provide('ol.format.JSONFeature');
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goog.require('goog.asserts');
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goog.require('ol.format.Feature');
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goog.require('ol.format.FormatType');
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/**
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* @classdesc
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* Abstract base class; normally only used for creating subclasses and not
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* instantiated in apps.
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* Base class for JSON feature formats.
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*
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* @constructor
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* @extends {ol.format.Feature}
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*/
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ol.format.JSONFeature = function() {
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ol.format.Feature.call(this);
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};
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ol.inherits(ol.format.JSONFeature, ol.format.Feature);
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/**
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* @param {Document|Node|Object|string} source Source.
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* @private
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* @return {Object} Object.
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*/
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ol.format.JSONFeature.prototype.getObject_ = function(source) {
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if (goog.isObject(source)) {
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return source;
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} else if (typeof source === 'string') {
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var object = JSON.parse(source);
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return object ? /** @type {Object} */ (object) : null;
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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.JSONFeature.prototype.getType = function() {
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return ol.format.FormatType.JSON;
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};
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/**
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* @inheritDoc
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*/
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ol.format.JSONFeature.prototype.readFeature = function(source, opt_options) {
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return this.readFeatureFromObject(
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this.getObject_(source), this.getReadOptions(source, opt_options));
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};
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/**
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* @inheritDoc
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*/
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ol.format.JSONFeature.prototype.readFeatures = function(source, opt_options) {
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return this.readFeaturesFromObject(
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this.getObject_(source), this.getReadOptions(source, opt_options));
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};
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/**
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* @param {Object} object Object.
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* @param {olx.format.ReadOptions=} opt_options Read options.
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* @protected
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* @return {ol.Feature} Feature.
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*/
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ol.format.JSONFeature.prototype.readFeatureFromObject = goog.abstractMethod;
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/**
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* @param {Object} object Object.
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* @param {olx.format.ReadOptions=} opt_options Read options.
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* @protected
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* @return {Array.<ol.Feature>} Features.
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*/
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ol.format.JSONFeature.prototype.readFeaturesFromObject = goog.abstractMethod;
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/**
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* @inheritDoc
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*/
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ol.format.JSONFeature.prototype.readGeometry = function(source, opt_options) {
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return this.readGeometryFromObject(
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this.getObject_(source), this.getReadOptions(source, opt_options));
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};
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/**
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* @param {Object} object Object.
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* @param {olx.format.ReadOptions=} opt_options Read options.
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* @protected
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* @return {ol.geom.Geometry} Geometry.
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*/
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ol.format.JSONFeature.prototype.readGeometryFromObject = goog.abstractMethod;
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/**
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* @inheritDoc
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*/
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ol.format.JSONFeature.prototype.readProjection = function(source) {
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return this.readProjectionFromObject(this.getObject_(source));
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};
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/**
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* @param {Object} object Object.
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* @protected
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* @return {ol.proj.Projection} Projection.
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*/
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ol.format.JSONFeature.prototype.readProjectionFromObject = goog.abstractMethod;
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/**
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* @inheritDoc
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*/
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ol.format.JSONFeature.prototype.writeFeature = function(feature, opt_options) {
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return JSON.stringify(this.writeFeatureObject(feature, opt_options));
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};
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/**
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* @param {ol.Feature} feature Feature.
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* @param {olx.format.WriteOptions=} opt_options Write options.
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* @return {Object} Object.
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*/
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ol.format.JSONFeature.prototype.writeFeatureObject = goog.abstractMethod;
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/**
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* @inheritDoc
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*/
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ol.format.JSONFeature.prototype.writeFeatures = function(features, opt_options) {
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return JSON.stringify(this.writeFeaturesObject(features, opt_options));
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};
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/**
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* @param {Array.<ol.Feature>} features Features.
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* @param {olx.format.WriteOptions=} opt_options Write options.
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* @return {Object} Object.
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*/
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ol.format.JSONFeature.prototype.writeFeaturesObject = goog.abstractMethod;
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/**
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* @inheritDoc
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*/
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ol.format.JSONFeature.prototype.writeGeometry = function(geometry, opt_options) {
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return JSON.stringify(this.writeGeometryObject(geometry, opt_options));
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};
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/**
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* @param {ol.geom.Geometry} geometry Geometry.
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* @param {olx.format.WriteOptions=} opt_options Write options.
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* @return {Object} Object.
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*/
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ol.format.JSONFeature.prototype.writeGeometryObject = goog.abstractMethod;
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