app service SubMatterTypesServic SubMatterTypes filter function SubMat

app.service('SubMatterTypesService', [
'SubMatterTypes', '$filter', '$q',
function(SubMatterTypes, $filter, $q) {
    this.init = function(query_params) {
        this.types = SubMatterTypes.query(query_params);
    };

    this.filter = function(filters) {
        var deffered = $q.defer(),
            self = this;

        if (!this.hasOwnProperty('types')) {
            this.init();
        }

        this.types.then(function() {
            var types = $filter('filter')(self.types, filters);
            deffered.resolve(types);
        });

        return deffered.promise;
    }
}]);