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<?php

namespace CGExtensions\query;

class sql_query extends query
{
    private $_data = array('sql'=>null,'limit'=>1000,'offset'=>0);

    public function __construct($parms = array())
    {
        foreach( $parms as $key => $val ) {
            if( array_key_exists($key,$this->_data) ) $this[$key] = $val;
        }
    }

    public function OffsetGet($key)
    {
        if( isset($this->_data[$key]) ) return $this->_data[$key];
        throw new \CmsInvalidDataException($key.' is not a valid member of '.__CLASS__);
    }

    public function OffsetSet($key,$value)
    {
        if( !array_key_exists($key,$this->_data) ) throw new \CmsInvalidDataException($key.' is not a valid member of '.__CLASS__);
        switch( $key ) {
        case 'sql':
            $this->_data[$key] = $value;
            break;

        case 'limit':
            $value = max(1,min(1000,(int)$value));
            $this->_data[$key] = $value;
            break;

        case 'offset':
            $val = max(0,min(9000000,(int)$value));
            $this->_data[$key] = $value;
            break;
        }
    }

    public function OffsetExists($key)
    {
        return array_key_exists($key,$this->_data);
    }

    public function &execute()
    {
        $rs = new sql_resultset($this);
        return $rs;
    }
} // end of class


?>