jquery.rdf.json.js

/*
 * jQuery RDF @VERSION
 *
 * Copyright (c) 2008,2009 Jeni Tennison
 * Licensed under the MIT (MIT-LICENSE.txt)
 *
 * Depends:
 *  jquery.uri.js
 *  jquery.xmlns.js
 *  jquery.datatype.js
 *  jquery.curie.js
 *  jquery.rdf.js
 *  jquery.json.js
 */
/**
 * @fileOverview jQuery RDF/JSON parser
 * @author <a href="mailto:jeni@jenitennison.com">Jeni Tennison</a>
 * @copyright (c) 2008,2009 Jeni Tennison
 * @license MIT license (MIT-LICENSE.txt)
 * @version 1.0
 */
/**
 * @exports $ as jQuery
 */
/**
 * @ignore
 */
(function ($) {

  $.rdf.parsers['application/json'] = {
    parse: $.secureEvalJSON,
    serialize: $.toJSON,
    triples: function (data) {
      var s, subject, p, property, o, object, i, opts, triples = [];
      for (s in data) {
        subject = (s.substring(0, 2) === '_:') ? $.rdf.blank(s) : $.rdf.resource('<' + s + '>', {base : this.baseURI});
        for (p in data[s]) {
          property = $.rdf.resource('<' + p + '>', {base : this.baseURI});
          for (i = 0; i < data[s][p].length; i += 1) {
            o = data[s][p][i];
            if (o.type === 'uri') {
              object = $.rdf.resource('<' + o.value + '>', {base : this.baseURI});
            } else if (o.type === 'bnode') {
              object = $.rdf.blank(o.value);
            } else {
              // o.type === 'literal'
              if (o.datatype !== undefined) {
                object = $.rdf.literal(o.value, { datatype: o.datatype, base : this.baseURI });
              } else {
                opts = {};
                if (o.lang !== undefined) {
                  opts.lang = o.lang;
                }
                var escapedValue = typeof o.value === "string" ? o.value.replace(/\"/g,'\\"') : o.value;
                opts.base = this.baseURI;
                object = $.rdf.literal('"' + escapedValue + '"', opts);
              }
            }
            triples.push($.rdf.triple(subject, property, object));
          }
        }
      }
      return triples;
    },
    dump: function (triples) {
      var e = {},
        i, t, s, p;
      for (i = 0; i < triples.length; i += 1) {
        t = triples[i];
        s = t.subject.value.toString();
        p = t.property.value.toString();
        if (e[s] === undefined) {
          e[s] = {};
        }
        if (e[s][p] === undefined) {
          e[s][p] = [];
        }
        e[s][p].push(t.object.dump());
      }
      return e;
    }
  };

})(jQuery);