rowset.class.php

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<?php
class db_rowset extends object implements Iterator, Countable, ArrayAccess {

        protected $_pointer = 0;

        protected $_count;

        protected $_rows = array();

        protected $fields;

        protected function afterInit() {
                $this->_count = count($this->cfg->data);
        }

        public function getDb() {
                return $this->cfg->db;
        }

        public function getTable() {
                return $this->cfg->table;
        }

        public function getWhere(array $prm = array()) {
                return $this->getDb()->getWhere($prm);
        }

        public function getFields($mode='flat') {
                if (!$this->fields[$mode])
                        $this->fields[$mode] = array_keys($this->get(0)->getValues($mode));
                return $this->fields[$mode];
        }

        public function get($number) {
                if (!array_key_exists($number, $this->_rows) && $this->cfg->checkInArray('data', $number)) {
                        $this->_rows[$number] = db::get('row', $this->getTable(), array(
                                'db'=>$this->getDb(),
                                'table'=>$this->getTable(),
                                'data'=>$this->cfg->getInArray('data', $number),
                        ));
                }
                return isset($this->_rows[$number]) ? $this->_rows[$number] : null;
        }

        public function add($row) {
                if ($row instanceof db_row) {
                        $this->_rows[$this->_count] = $row;
                        $array = $row->getData();
                } else {
                        $array = $row;
                }
                $this->cfg->setInArray('data', $this->_count, $array);
                $this->_count++;
        }

        public function getData() {
                return $this->cfg->data;
        }

        public function rewind() {
                $this->_pointer = 0;
        }

        public function current() {
                return $this->get($this->_pointer);
        }

        public function key() {
                return $this->_pointer;
        }

        public function next() {
                $this->_pointer++;
        }

        public function valid() {
                return $this->_pointer < $this->_count;
        }

        public function count() {
                return $this->_count;
        }

        public function offsetExists($offset) {
                $this->get($offset);
                return array_key_exists($offset, $this->_rows);
        }

        public function offsetGet($offset) {
                return $this->get($offset);
        }

        public function offsetSet($offset, $value) {
                return $this->_rows[$offset] = $value;
        }

        public function offsetUnset($offset) {
                unset($this->_rows[$offset]);
        }
        
        public function __toString() {
                $tmp = array();
                foreach($this as $row)
                        $tmp[] = $row.'';
                return 'rowSet_'.implode('_', $tmp);
        }

}