Horde_Rdo_Query::setMapper PHP Method

    public function setMapper($mapper)
    {
        if ($mapper === $this->mapper) {
            return $this;
        }
        $this->mapper = $mapper;
        // Fetch all non-lazy-loaded fields for the mapper.
        $this->setFields($mapper->fields, $mapper->table . '.');
        // Add all non-lazy relationships.
        foreach ($mapper->relationships as $relationship => $rel) {
            if (isset($rel['mapper'])) {
                // @TODO - should be getting this instance from somewhere
                // else external, and not passing the adapter along
                // automatically.
                $m = new $rel['mapper']($this->mapper->adapter);
            } else {
                $m = $this->mapper->tableToMapper($relationship);
                if (is_null($m)) {
                    throw new Horde_Rdo_Exception('Unable to find a Mapper class for eager-loading relationship ' . $relationship);
                }
            }
            // Add the fields for this relationship to the query.
            $m->tableAlias = $this->_alias($m->table);
            $this->addFields($m->fields, $m->tableAlias . '.@');
            $args = array('mapper' => $m, 'type' => $rel['type']);
            switch ($rel['type']) {
                case Horde_Rdo::ONE_TO_ONE:
                case Horde_Rdo::MANY_TO_ONE:
                    if (isset($rel['query'])) {
                        $args['query'] = $this->_fillJoinPlaceholders($m, $mapper, $rel['query']);
                    } else {
                        $args['query'] = array($mapper->table . '.' . $rel['foreignKey'] => new Horde_Rdo_Query_Literal($m->table . '.' . $m->tableDefinition->getPrimaryKey()));
                    }
                    if (isset($rel['join_type'])) {
                        $args['join_type'] = $rel['join_type'];
                    }
                    $this->addRelationship($relationship, $args);
                    break;
                case Horde_Rdo::ONE_TO_MANY:
                case Horde_Rdo::MANY_TO_MANY:
                    //@TODO
            }
        }
        return $this;
    }