/*
    Copyright (C) 2009-2011 CREA Lab, CNRS/Ecole Polytechnique UMR 7656 (Fr)
#
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
#
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
#
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/*
* Generic Cache object
* providing access to DOM data storage
*/
var Cache = {

    prefix: "tinasoftdesktopdata-",
    /*
    Function: setValue
    Parameters:
        key - A unique string identifier
        defaultValue - This value will be returned if nothing is found.
        rawValue - Doesn't use Json encoding on stored values
    Returns:
        value stored
    */
    setValue : function( key, value ) {
        $("#"+this.prefix+key).remove();
        $('<div></div>').attr('id',this.prefix+key).data( key, value ).appendTo('body');
        return this.prefix+key;
    },
    /*
    Function: getValue
    Parameters:
        key - A unique string identifier
        defaultValue - This value will be returned if nothing is found.
        rawValue - Doesn't use Json encoding on stored values
    Returns:
        Either the stored value, or defaultValue if none is found.
    */
    getValue : function ( key, defaultValue ) {
        if (defaultValue === undefined ) {
            defaultValue = {};
        }
        var storagediv = $("#"+this.prefix+key);
        var result = storagediv.data( key );
        if ( result == null || result === undefined) {
            return defaultValue;
        }
        else {
            return result;
        }
    },
};