openlayers
Version:
Build tools and sources for developing OpenLayers based mapping applications
171 lines (135 loc) • 4.08 kB
JavaScript
goog.provide('ol.format.JSONFeature');
goog.require('ol');
goog.require('ol.format.Feature');
goog.require('ol.format.FormatType');
/**
* @classdesc
* Abstract base class; normally only used for creating subclasses and not
* instantiated in apps.
* Base class for JSON feature formats.
*
* @constructor
* @extends {ol.format.Feature}
*/
ol.format.JSONFeature = function() {
ol.format.Feature.call(this);
};
ol.inherits(ol.format.JSONFeature, ol.format.Feature);
/**
* @param {Document|Node|Object|string} source Source.
* @private
* @return {Object} Object.
*/
ol.format.JSONFeature.prototype.getObject_ = function(source) {
if (typeof source === 'string') {
var object = JSON.parse(source);
return object ? /** @type {Object} */ (object) : null;
} else if (source !== null) {
return source;
} else {
return null;
}
};
/**
* @inheritDoc
*/
ol.format.JSONFeature.prototype.getType = function() {
return ol.format.FormatType.JSON;
};
/**
* @inheritDoc
*/
ol.format.JSONFeature.prototype.readFeature = function(source, opt_options) {
return this.readFeatureFromObject(
this.getObject_(source), this.getReadOptions(source, opt_options));
};
/**
* @inheritDoc
*/
ol.format.JSONFeature.prototype.readFeatures = function(source, opt_options) {
return this.readFeaturesFromObject(
this.getObject_(source), this.getReadOptions(source, opt_options));
};
/**
* @abstract
* @param {Object} object Object.
* @param {olx.format.ReadOptions=} opt_options Read options.
* @protected
* @return {ol.Feature} Feature.
*/
ol.format.JSONFeature.prototype.readFeatureFromObject = function(object, opt_options) {};
/**
* @abstract
* @param {Object} object Object.
* @param {olx.format.ReadOptions=} opt_options Read options.
* @protected
* @return {Array.<ol.Feature>} Features.
*/
ol.format.JSONFeature.prototype.readFeaturesFromObject = function(object, opt_options) {};
/**
* @inheritDoc
*/
ol.format.JSONFeature.prototype.readGeometry = function(source, opt_options) {
return this.readGeometryFromObject(
this.getObject_(source), this.getReadOptions(source, opt_options));
};
/**
* @abstract
* @param {Object} object Object.
* @param {olx.format.ReadOptions=} opt_options Read options.
* @protected
* @return {ol.geom.Geometry} Geometry.
*/
ol.format.JSONFeature.prototype.readGeometryFromObject = function(object, opt_options) {};
/**
* @inheritDoc
*/
ol.format.JSONFeature.prototype.readProjection = function(source) {
return this.readProjectionFromObject(this.getObject_(source));
};
/**
* @abstract
* @param {Object} object Object.
* @protected
* @return {ol.proj.Projection} Projection.
*/
ol.format.JSONFeature.prototype.readProjectionFromObject = function(object) {};
/**
* @inheritDoc
*/
ol.format.JSONFeature.prototype.writeFeature = function(feature, opt_options) {
return JSON.stringify(this.writeFeatureObject(feature, opt_options));
};
/**
* @abstract
* @param {ol.Feature} feature Feature.
* @param {olx.format.WriteOptions=} opt_options Write options.
* @return {Object} Object.
*/
ol.format.JSONFeature.prototype.writeFeatureObject = function(feature, opt_options) {};
/**
* @inheritDoc
*/
ol.format.JSONFeature.prototype.writeFeatures = function(features, opt_options) {
return JSON.stringify(this.writeFeaturesObject(features, opt_options));
};
/**
* @abstract
* @param {Array.<ol.Feature>} features Features.
* @param {olx.format.WriteOptions=} opt_options Write options.
* @return {Object} Object.
*/
ol.format.JSONFeature.prototype.writeFeaturesObject = function(features, opt_options) {};
/**
* @inheritDoc
*/
ol.format.JSONFeature.prototype.writeGeometry = function(geometry, opt_options) {
return JSON.stringify(this.writeGeometryObject(geometry, opt_options));
};
/**
* @abstract
* @param {ol.geom.Geometry} geometry Geometry.
* @param {olx.format.WriteOptions=} opt_options Write options.
* @return {Object} Object.
*/
ol.format.JSONFeature.prototype.writeGeometryObject = function(geometry, opt_options) {};