text: goog.provide('ol.format.JSONFeature');
  
  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) {};
  