/**
 * Sets the type of metadata to use. Metadata is encoded in JSON, and each property
 * in the JSON will become a property of the element itself.
 *
 * There are four supported types of metadata storage:
 *
 *   attr:  Inside an attribute. The name parameter indicates *which* attribute.
 *          
 *   class: Inside the class attribute, wrapped in curly braces: { }
 *   
 *   elem:  Inside a child element (e.g. a script tag). The
 *          name parameter indicates *which* element.
 *   html5: Values are stored in data-* attributes.
 *          
 * The metadata for an element is loaded the first time the element is accessed via jQuery.
 *
 * As a result, you can define the metadata type, use $(expr) to load the metadata into the elements
 * matched by expr, then redefine the metadata type and run another $(expr) for other elements.
 * 
 * @name $.metadata.setType
 *
 * @example <p id="one" class="some_class {item_id: 1, item_label: 'Label'}">This is a p</p>
 * @before $.metadata.setType("class")
 * @after $("#one").metadata().item_id == 1; $("#one").metadata().item_label == "Label"
 * @desc Reads metadata from the class attribute
 * 
 * @example <p id="one" class="some_class" data="{item_id: 1, item_label: 'Label'}">This is a p</p>
 * @before $.metadata.setType("attr", "data")
 * @after $("#one").metadata().item_id == 1; $("#one").metadata().item_label == "Label"
 * @desc Reads metadata from a "data" attribute
 * 
 * @example <p id="one" class="some_class"><script>{item_id: 1, item_label: 'Label'}</script>This is a p</p>
 * @before $.metadata.setType("elem", "script")
 * @after $("#one").metadata().item_id == 1; $("#one").metadata().item_label == "Label"
 * @desc Reads metadata from a nested script element
 * 
 * @example <p id="one" class="some_class" data-item_id="1" data-item_label="Label">This is a p</p>
 * @before $.metadata.setType("html5")
 * @after $("#one").metadata().item_id == 1; $("#one").metadata().item_label == "Label"
 * @desc Reads metadata from a series of data-* attributes
 *
 * @param String type The encoding type
 * @param String name The name of the attribute to be used to get metadata (optional)
 * @cat Plugins/Metadata
 * @descr Sets the type of encoding to be used when loading metadata for the first time
 * @type undefined
 * @see metadata()
 */(function($){$.extend({metadata:{defaults:{type:'class',name:'metadata',cre:/({.*})/,single:'metadata'},setType:function(type,name){this.defaults.type=type;this.defaults.name=name;},get:function(elem,opts){var settings=$.extend({},this.defaults,opts);if(!settings.single.length)settings.single='metadata';var data=$.data(elem,settings.single);if(data)return data;data="{}";var getData=function(data){if(typeof data!="string")return data;if(data.indexOf('{')<0){data=eval("("+ data+")");}}
var getObject=function(data){if(typeof data!="string")return data;data=eval("("+ data+")");return data;}
if(settings.type=="html5"){var object={};$(elem.attributes).each(function(){var name=this.nodeName;if(name.match(/^data-/))name=name.replace(/^data-/,'');else return true;object[name]=getObject(this.nodeValue);});}else{if(settings.type=="class"){var m=settings.cre.exec(elem.className);if(m)
data=m[1];}else if(settings.type=="elem"){if(!elem.getElementsByTagName)return;var e=elem.getElementsByTagName(settings.name);if(e.length)
data=$.trim(e[0].innerHTML);}else if(elem.getAttribute!=undefined){var attr=elem.getAttribute(settings.name);if(attr)
data=attr;}
object=getObject(data.indexOf("{")<0?"{"+ data+"}":data);}
$.data(elem,settings.single,object);return object;}}});$.fn.metadata=function(opts){return $.metadata.get(this[0],opts);};})(jQuery);