define( [

"./core",
"./core/access",
"./data/var/dataPriv",
"./data/var/dataUser"

], function( jQuery, access, dataPriv, dataUser ) {

“use strict”;

// Implementation Summary // // 1. Enforce API surface and semantic compatibility with 1.9.x branch // 2. Improve the module's maintainability by reducing the storage // paths to a single mechanism. // 3. Use the same single mechanism to support “private” and “user” data. // 4. Never expose “private” data to user code (TODO: Drop _data, _removeData) // 5. Avoid exposing implementation details on user objects (eg. expando properties) // 6. Provide a clear path for implementation upgrade to WeakMap in 2014

var rbrace = /^(?:{[wW]*}|[[wW]*])$/,

rmultiDash = /[A-Z]/g;

function getData( data ) {

if ( data === "true" ) {
        return true;
}

if ( data === "false" ) {
        return false;
}

if ( data === "null" ) {
        return null;
}

// Only convert to a number if it doesn't change the string
if ( data === +data + "" ) {
        return +data;
}

if ( rbrace.test( data ) ) {
        return JSON.parse( data );
}

return data;

}

function dataAttr( elem, key, data ) {

var name;

// If nothing was found internally, try to fetch any
// data from the HTML5 data-* attribute
if ( data === undefined && elem.nodeType === 1 ) {
        name = "data-" + key.replace( rmultiDash, "-$&" ).toLowerCase();
        data = elem.getAttribute( name );

        if ( typeof data === "string" ) {
                try {
                        data = getData( data );
                } catch ( e ) {}

                // Make sure we set the data so it isn't changed later
                dataUser.set( elem, key, data );
        } else {
                data = undefined;
        }
}
return data;

}

jQuery.extend( {

hasData: function( elem ) {
        return dataUser.hasData( elem ) || dataPriv.hasData( elem );
},

data: function( elem, name, data ) {
        return dataUser.access( elem, name, data );
},

removeData: function( elem, name ) {
        dataUser.remove( elem, name );
},

// TODO: Now that all calls to _data and _removeData have been replaced
// with direct calls to dataPriv methods, these can be deprecated.
_data: function( elem, name, data ) {
        return dataPriv.access( elem, name, data );
},

_removeData: function( elem, name ) {
        dataPriv.remove( elem, name );
}

} );

jQuery.fn.extend( {

data: function( key, value ) {
        var i, name, data,
                elem = this[ 0 ],
                attrs = elem && elem.attributes;

        // Gets all values
        if ( key === undefined ) {
                if ( this.length ) {
                        data = dataUser.get( elem );

                        if ( elem.nodeType === 1 && !dataPriv.get( elem, "hasDataAttrs" ) ) {
                                i = attrs.length;
                                while ( i-- ) {

                                        // Support: IE 11 only
                                        // The attrs elements can be null (#14894)
                                        if ( attrs[ i ] ) {
                                                name = attrs[ i ].name;
                                                if ( name.indexOf( "data-" ) === 0 ) {
                                                        name = jQuery.camelCase( name.slice( 5 ) );
                                                        dataAttr( elem, name, data[ name ] );
                                                }
                                        }
                                }
                                dataPriv.set( elem, "hasDataAttrs", true );
                        }
                }

                return data;
        }

        // Sets multiple values
        if ( typeof key === "object" ) {
                return this.each( function() {
                        dataUser.set( this, key );
                } );
        }

        return access( this, function( value ) {
                var data;

                // The calling jQuery object (element matches) is not empty
                // (and therefore has an element appears at this[ 0 ]) and the
                // `value` parameter was not undefined. An empty jQuery object
                // will result in `undefined` for elem = this[ 0 ] which will
                // throw an exception if an attempt to read a data cache is made.
                if ( elem && value === undefined ) {

                        // Attempt to get data from the cache
                        // The key will always be camelCased in Data
                        data = dataUser.get( elem, key );
                        if ( data !== undefined ) {
                                return data;
                        }

                        // Attempt to "discover" the data in
                        // HTML5 custom data-* attrs
                        data = dataAttr( elem, key );
                        if ( data !== undefined ) {
                                return data;
                        }

                        // We tried really hard, but the data doesn't exist.
                        return;
                }

                // Set the data...
                this.each( function() {

                        // We always store the camelCased key
                        dataUser.set( this, key, value );
                } );
        }, null, value, arguments.length > 1, null, true );
},

removeData: function( key ) {
        return this.each( function() {
                dataUser.remove( this, key );
        } );
}

} );

return jQuery; } );