';print_r($lcfg);exit;
        
        // if there is no link data at all on the file!
        // we return null.
        if ($lcfg[$this->_database] === false) {
            return null;
        }
        
        if (isset($lcfg[$this->_database][$this->tableName()])) {
            return $lcfg[$this->_database][$this->tableName()];
        }
        
        return array();
    }
    
    
    /**
     * generic getter/setter for links
     *
     * This is the new 'recommended' way to get get/set linked objects.
     * must be used with links.ini
     *
     * usage:
     *  get:
     *  $obj = $do->link('company_id');
     *  $obj = $do->link(array('local_col', 'linktable:linked_col'));
     *  
     *  set:
     *  $do->link('company_id',0);
     *  $do->link('company_id',$obj);
     *  $do->link('company_id', array($obj));
     *
     *  example function
     *
     *  function company() {
     *     $this->link(array('company_id','company:id'), func_get_args());
     *   }
     *
     * 
     *
     * @param  mixed $link_spec              link specification (normally a string)
     *                                       uses similar rules to  joinAdd() array argument.
     * @param  mixed $set_value (optional)   int, DataObject, or array('set')
     * @author Alan Knowles
     * @access public
     * @return mixed true or false on setting, object on getting
     */
    function link($field, $set_args = array())
    {
        require_once 'DB/DataObject/Links.php';
        $l = new DB_DataObject_Links($this);
        return  $l->link($field,$set_args) ;
        
    }
    
      /**
     * load related objects
     *
     * Generally not recommended to use this.
     * The generator should support creating getter_setter methods which are better suited.
     *
     * Relies on  .links.ini
     *
     * Sets properties on the calling dataobject  you can change what
     * object vars the links are stored in by  changeing the format parameter
     *
     *
     * @param  string format (default _%s) where %s is the table name.
     * @author Tim White 
     * @access public
     * @return boolean , true on success
     */
    function getLinks($format = '_%s')
    {
        require_once 'DB/DataObject/Links.php';
         $l = new DB_DataObject_Links($this);
        return $l->applyLinks($format);
           
    }

    /**
     * deprecited : @use link() 
     */
    function getLink($row, $table = null, $link = false)
    {
        require_once 'DB/DataObject/Links.php';
        $l = new DB_DataObject_Links($this);
        return $l->getLink($row, $table === null ? false: $table, $link);
         
        
    }

    /**
     * getLinkArray
     * Fetch an array of related objects. This should be used in conjunction with a .links.ini file configuration (see the introduction on linking for details on this).
     * You may also use this with all parameters to specify, the column and related table.
     * This is highly dependant on naming columns 'correctly' :)
     * using colname = xxxxx_yyyyyy
     * xxxxxx = related table; (yyyyy = user defined..)
     * looks up table xxxxx, for value id=$this->xxxxx
     * stores it in $this->_xxxxx_yyyyy
     *
     * @access public
     * @param string $column - either column or column.xxxxx
     * @param string $table - name of table to look up value in
     * @return array - array of results (empty array on failure)
     * 
     * Example - Getting the related objects
     * 
     * $person = new DataObjects_Person;
     * $person->get(12);
     * $children = $person->getLinkArray('children');
     * 
     * echo 'There are ', count($children), ' descendant(s):
';
     * foreach ($children as $child) {
     *     echo $child->name, '
';
     * }
     * 
     */
    function getLinkArray($row, $table = null)
    {
        require_once 'DB/DataObject/Links.php';
        $l = new DB_DataObject_Links($this);
        return $l->getLinkArray($row, $table === null ? false: $table);
     
    }

     /**
     * unionAdd - adds another dataobject to this, building a unioned query.
     *
     * usage:  
     * $doTable1 = DB_DataObject::factory("table1");
     * $doTable2 = DB_DataObject::factory("table2");
     * 
     * $doTable1->selectAdd();
     * $doTable1->selectAdd("col1,col2");
     * $doTable1->whereAdd("col1 > 100");
     * $doTable1->orderBy("col1");
     *
     * $doTable2->selectAdd();
     * $doTable2->selectAdd("col1, col2");
     * $doTable2->whereAdd("col2 = 'v'");
     * 
     * $doTable1->unionAdd($doTable2);
     * $doTable1->find();
      * 
     * Note: this model may be a better way to implement joinAdd?, eg. do the building in find?
     * 
     * 
     * @param             $obj       object|false the union object or false to reset
     * @param    optional $is_all    string 'ALL' to do all.
     * @returns           $obj       object|array the added object, or old list if reset.
     */
    
    function unionAdd($obj,$is_all= '')
    {
        if ($obj === false) {
            $ret = $this->_query['unions'];
            $this->_query['unions'] = array();
            return $ret;
        }
        $this->_query['unions'][] = array($obj, 'UNION ' . $is_all . ' ') ;
        return $obj;
    }

    
    
    /**
     * The JOIN condition
     *
     * @access  private
     * @var     string
     */
    var $_join = '';

    /**
     * joinAdd - adds another dataobject to this, building a joined query.
     *
     * example (requires links.ini to be set up correctly)
     * // get all the images for product 24
     * $i = new DataObject_Image();
     * $pi = new DataObjects_Product_image();
     * $pi->product_id = 24; // set the product id to 24
     * $i->joinAdd($pi); // add the product_image connectoin
     * $i->find();
     * while ($i->fetch()) {
     *     // do stuff
     * }
     * // an example with 2 joins
     * // get all the images linked with products or productgroups
     * $i = new DataObject_Image();
     * $pi = new DataObject_Product_image();
     * $pgi = new DataObject_Productgroup_image();
     * $i->joinAdd($pi);
     * $i->joinAdd($pgi);
     * $i->find();
     * while ($i->fetch()) {
     *     // do stuff
     * }
     *
     *
     * @param    optional $obj       object |array    the joining object (no value resets the join)
     *                                          If you use an array here it should be in the format:
     *                                          array('local_column','remotetable:remote_column');
     *                                             if remotetable does not have a definition, you should
     *                                             use @ to hide the include error message..
     *                                          array('local_column',  $dataobject , 'remote_column');
     *                                             if array has 3 args, then second is assumed to be the linked dataobject.
     *
     * @param    optional $joinType  string | array
     *                                          'LEFT'|'INNER'|'RIGHT'|'' Inner is default, '' indicates 
     *                                          just select ... from a,b,c with no join and 
     *                                          links are added as where items.
     *                                          
     *                                          If second Argument is array, it is assumed to be an associative
     *                                          array with arguments matching below = eg.
     *                                          'joinType' => 'INNER',
     *                                          'joinAs' => '...'
     *                                          'joinCol' => ....
     *                                          'useWhereAsOn' => false,
     *
     * @param    optional $joinAs    string     if you want to select the table as anther name
     *                                          useful when you want to select multiple columsn
     *                                          from a secondary table.
     
     * @param    optional $joinCol   string     The column on This objects table to match (needed
     *                                          if this table links to the child object in 
     *                                          multiple places eg.
     *                                          user->friend (is a link to another user)
     *                                          user->mother (is a link to another user..)
     *
     *           optional 'useWhereAsOn' bool   default false;
     *                                          convert the where argments from the object being added
     *                                          into ON arguments.
     * 
     * 
     * @return   none
     * @access   public
     * @author   Stijn de Reede      
     */
    function joinAdd($obj = false, $joinType='INNER', $joinAs=false, $joinCol=false)
    {
        global $_DB_DATAOBJECT;
        if ($obj === false) {
            $this->_join = '';
            return;
        }
         
        //echo '
'; print_r(func_get_args());
        $useWhereAsOn = false;
        // support for 2nd argument as an array of options
        if (is_array($joinType)) {
            // new options can now go in here... (dont forget to document them)
            $useWhereAsOn = !empty($joinType['useWhereAsOn']);
            $joinCol      = isset($joinType['joinCol'])  ? $joinType['joinCol']  : $joinCol;
            $joinAs       = isset($joinType['joinAs'])   ? $joinType['joinAs']   : $joinAs;
            $joinType     = isset($joinType['joinType']) ? $joinType['joinType'] : 'INNER';
        }
        // support for array as first argument 
        // this assumes that you dont have a links.ini for the specified table.
        // and it doesnt exist as am extended dataobject!! - experimental.
        
        $ofield = false; // object field
        $tfield = false; // this field
        $toTable = false;
        if (is_array($obj)) {
            $tfield = $obj[0];
            
            if (count($obj) == 3) {
                $ofield = $obj[2];
                $obj = $obj[1];
            } else {
                list($toTable,$ofield) = explode(':',$obj[1]);
            
                $obj = is_string($toTable) ? DB_DataObject::factory($toTable) : $toTable;
            
                if (!$obj || !is_object($obj) || is_a($obj,'PEAR_Error')) {
                    $obj = new DB_DataObject;
                    $obj->__table = $toTable;
                }
                $obj->_connect();
            }
            // set the table items to nothing.. - eg. do not try and match
            // things in the child table...???
            $items = array();
        }
        
        if (!is_object($obj) || !is_a($obj,'DB_DataObject')) {
            return $this->raiseError("joinAdd: called without an object", DB_DATAOBJECT_ERROR_NODATA,PEAR_ERROR_DIE);
        }
        /*  make sure $this->_database is set.  */
        $this->_connect();
        $DB = $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
       

        /// CHANGED 26 JUN 2009 - we prefer links from our local table over the remote one.
        
        /* otherwise see if there are any links from this table to the obj. */
        //print_r($this->links());
        if (($ofield === false) && ($links = $this->links())) {
            // this enables for support for arrays of links in ini file.
            // link contains this_column[] =  linked_table:linked_column
            // or standard way.
            // link contains this_column =  linked_table:linked_column
            foreach ($links as $k => $linkVar) {
            
                if (!is_array($linkVar)) {
                    $linkVar  = array($linkVar);
                }
                foreach($linkVar as $v) {

                    
                    
                    /* link contains {this column} = {linked table}:{linked column} */
                    $ar = explode(':', $v);
                    // Feature Request #4266 - Allow joins with multiple keys
                    if (strpos($k, ',') !== false) {
                        $k = explode(',', $k);
                    }
                    if (strpos($ar[1], ',') !== false) {
                        $ar[1] = explode(',', $ar[1]);
                    }

                    if ($ar[0] != $obj->tableName()) {
                        continue;
                    }
                    if ($joinCol !== false) {
                        if ($k == $joinCol) {
                            // got it!?
                            $tfield = $k;
                            $ofield = $ar[1];
                            break;
                        } 
                        continue;
                        
                    } 
                    $tfield = $k;
                    $ofield = $ar[1];
                    break;
                        
                }
            }
        }
         /* look up the links for obj table */
        //print_r($obj->links());
        if (!$ofield && ($olinks = $obj->links())) {
            
            foreach ($olinks as $k => $linkVar) {
                /* link contains {this column} = array ( {linked table}:{linked column} )*/
                if (!is_array($linkVar)) {
                    $linkVar  = array($linkVar);
                }
                foreach($linkVar as $v) {
                    
                    /* link contains {this column} = {linked table}:{linked column} */
                    $ar = explode(':', $v);
                    
                    // Feature Request #4266 - Allow joins with multiple keys
                    $links_key_array = strpos($k,',');
                    if ($links_key_array !== false) {
                        $k = explode(',', $k);
                    }
                    
                    $ar_array = strpos($ar[1],',');
                    if ($ar_array !== false) {
                        $ar[1] = explode(',', $ar[1]);
                    }
                 
                    if ($ar[0] != $this->tableName()) {
                        continue;
                    }
                    
                    // you have explictly specified the column
                    // and the col is listed here..
                    // not sure if 1:1 table could cause probs here..
                    
                    if ($joinCol !== false) {
                        $this->raiseError( 
                            "joinAdd: You cannot target a join column in the " .
                            "'link from' table ({$obj->__table}). " . 
                            "Either remove the fourth argument to joinAdd() ".
                            "({$joinCol}), or alter your links.ini file.",
                            DB_DATAOBJECT_ERROR_NODATA);
                        return false;
                    }
                
                    $ofield = $k;
                    $tfield = $ar[1];
                    break;
                    
                }
            }
        }

        // finally if these two table have column names that match do a join by default on them

        if (($ofield === false) && $joinCol) {
            $ofield = $joinCol;
            $tfield = $joinCol;

        }
        /* did I find a conneciton between them? */

        if ($ofield === false) {
            $this->raiseError(
                "joinAdd: {$obj->tableName()} has no link with {$this->tableName()}",
                DB_DATAOBJECT_ERROR_NODATA);
            return false;
        }
        $joinType = strtoupper($joinType);
        
        // we default to joining as the same name (this is remvoed later..)
        
        if ($joinAs === false) {
            $joinAs = $obj->tableName();
        }
        
        $quoteIdentifiers = !empty($_DB_DATAOBJECT['CONFIG']['quote_identifiers']);
        $options = $_DB_DATAOBJECT['CONFIG'];
        
        // not sure  how portable adding database prefixes is..
        $objTable = $quoteIdentifiers ? 
                $DB->quoteIdentifier($obj->tableName()) : 
                 $obj->tableName() ;
                
        $dbPrefix  = '';
        if (strlen($obj->_database) && in_array($DB->dsn['phptype'],array('mysql','mysqli'))) {
            $dbPrefix = ($quoteIdentifiers
                         ? $DB->quoteIdentifier($obj->_database)
                         : $obj->_database) . '.';    
        }
        
        // if they are the same, then dont add a prefix...                
        if ($obj->_database == $this->_database) {
           $dbPrefix = '';
        }
        // as far as we know only mysql supports database prefixes..
        // prefixing the database name is now the default behaviour,
        // as it enables joining mutiple columns from multiple databases...
         
            // prefix database (quoted if neccessary..)
        $objTable = $dbPrefix . $objTable;
       
        $cond = '';

        // if obj only a dataobject - eg. no extended class has been defined..
        // it obvioulsy cant work out what child elements might exist...
        // until we get on the fly querying of tables..
        // note: we have already checked that it is_a(db_dataobject earlier)
        if ( strtolower(get_class($obj)) != 'db_dataobject') {
                 
            // now add where conditions for anything that is set in the object 
        
        
        
            $items = $obj->table();
            // will return an array if no items..
            
            // only fail if we where expecting it to work (eg. not joined on a array)
             
            if (!$items) {
                $this->raiseError(
                    "joinAdd: No table definition for {$obj->__table}", 
                    DB_DATAOBJECT_ERROR_INVALIDCONFIG);
                return false;
            }
            
            $ignore_null = !isset($options['disable_null_strings'])
                    || !is_string($options['disable_null_strings'])
                    || strtolower($options['disable_null_strings']) !== 'full' ;
            

            foreach($items as $k => $v) {
                if (!isset($obj->$k) && $ignore_null) {
                    continue;
                }
                
                $kSql = ($quoteIdentifiers ? $DB->quoteIdentifier($k) : $k);
                
                if (DB_DataObject::_is_null($obj,$k)) {
                	$obj->whereAdd("{$joinAs}.{$kSql} IS NULL");
                	continue;
                }
                
                if ($v & DB_DATAOBJECT_STR) {
                    $obj->whereAdd("{$joinAs}.{$kSql} = " . $this->_quote((string) (
                            ($v & DB_DATAOBJECT_BOOL) ? 
                                // this is thanks to the braindead idea of postgres to 
                                // use t/f for boolean.
                                (($obj->$k === 'f') ? 0 : (int)(bool) $obj->$k) :  
                                $obj->$k
                        )));
                    continue;
                }
                if (is_numeric($obj->$k)) {
                    $obj->whereAdd("{$joinAs}.{$kSql} = {$obj->$k}");
                    continue;
                }
                            
                if (is_object($obj->$k) && is_a($obj->$k,'DB_DataObject_Cast')) {
                    $value = $obj->$k->toString($v,$DB);
                    if (PEAR::isError($value)) {
                        $this->raiseError($value->getMessage() ,DB_DATAOBJECT_ERROR_INVALIDARG);
                        return false;
                    } 
                    $obj->whereAdd("{$joinAs}.{$kSql} = $value");
                    continue;
                }
                
                
                /* this is probably an error condition! */
                $obj->whereAdd("{$joinAs}.{$kSql} = 0");
            }
            if ($this->_query === false) {
                $this->raiseError(
                    "joinAdd can not be run from a object that has had a query run on it,
                    clone the object or create a new one and use setFrom()", 
                    DB_DATAOBJECT_ERROR_INVALIDARGS);
                return false;
            }
        }

        // and finally merge the whereAdd from the child..
        if ($obj->_query['condition']) {
            $cond = preg_replace('/^\sWHERE/i','',$obj->_query['condition']);

            if (!$useWhereAsOn) {
                $this->whereAdd($cond);
            }
        }
    
        
        
        
        // nested (join of joined objects..)
        $appendJoin = '';
        if ($obj->_join) {
            // postgres allows nested queries, with ()'s
            // not sure what the results are with other databases..
            // may be unpredictable..
            if (in_array($DB->dsn["phptype"],array('pgsql'))) {
                $objTable = "($objTable {$obj->_join})";
            } else {
                $appendJoin = $obj->_join;
            }
        }
        
  
        // fix for #2216
        // add the joinee object's conditions to the ON clause instead of the WHERE clause
        if ($useWhereAsOn && strlen($cond)) {
            $appendJoin = ' AND ' . $cond . ' ' . $appendJoin;
        }
               
        
        
        $table = $this->tableName();
        
        if ($quoteIdentifiers) {
            $joinAs   = $DB->quoteIdentifier($joinAs);
            $table    = $DB->quoteIdentifier($table);     
            $ofield   = (is_array($ofield)) ? array_map(array($DB, 'quoteIdentifier'), $ofield) : $DB->quoteIdentifier($ofield);
            $tfield   = (is_array($tfield)) ? array_map(array($DB, 'quoteIdentifier'), $tfield) : $DB->quoteIdentifier($tfield); 
        }
        // add database prefix if they are different databases
       
        
        $fullJoinAs = '';
        $addJoinAs  = ($quoteIdentifiers ? $DB->quoteIdentifier($obj->tableName()) : $obj->tableName()) != $joinAs;
        if ($addJoinAs) {
            // join table a AS b - is only supported by a few databases and is probably not needed
            // , however since it makes the whole Statement alot clearer we are leaving it in
            // for those databases.
            $fullJoinAs = in_array($DB->dsn["phptype"],array('mysql','mysqli','pgsql')) ? "AS {$joinAs}" :  $joinAs;
        } else {
            // if 
            $joinAs = $dbPrefix . $joinAs;
        }
        
        
        switch ($joinType) {
            case 'INNER':
            case 'LEFT': 
            case 'RIGHT': // others??? .. cross, left outer, right outer, natural..?
                
                // Feature Request #4266 - Allow joins with multiple keys
                $jadd = "\n {$joinType} JOIN {$objTable} {$fullJoinAs}";
                //$this->_join .= "\n {$joinType} JOIN {$objTable} {$fullJoinAs}";
                if (is_array($ofield)) {
                	$key_count = count($ofield);
                    for($i = 0; $i < $key_count; $i++) {
                    	if ($i == 0) {
                    		$jadd .= " ON ({$joinAs}.{$ofield[$i]}={$table}.{$tfield[$i]}) ";
                    	}
                    	else {
                    		$jadd .= " AND {$joinAs}.{$ofield[$i]}={$table}.{$tfield[$i]} ";
                    	}
                    }
                    $jadd .= ' ' . $appendJoin . ' ';
                } else {
	                $jadd .= " ON ({$joinAs}.{$ofield}={$table}.{$tfield}) {$appendJoin} ";
                }
                // jadd avaliable for debugging join build.
                //echo $jadd ."\n";
                $this->_join .= $jadd;
                break;
                
            case '': // this is just a standard multitable select..
                $this->_join .= "\n , {$objTable} {$fullJoinAs} {$appendJoin}";
                $this->whereAdd("{$joinAs}.{$ofield}={$table}.{$tfield}");
        }
         
         
        return true;

    }

    /**
     * autoJoin - using the links.ini file, it builds a query with all the joins 
     * usage: 
     * $x = DB_DataObject::factory('mytable');
     * $x->autoJoin();
     * $x->get(123); 
     *   will result in all of the joined data being added to the fetched object..
     * 
     * $x = DB_DataObject::factory('mytable');
     * $x->autoJoin();
     * $ar = $x->fetchAll();
     *   will result in an array containing all the data from the table, and any joined tables..
     * 
     * $x = DB_DataObject::factory('mytable');
     * $jdata = $x->autoJoin();
     * $x->selectAdd(); //reset..
     * foreach($_REQUEST['requested_cols'] as $c) {
     *    if (!isset($jdata[$c])) continue; // ignore columns not available..
     *    $x->selectAdd( $jdata[$c] . ' as ' . $c);
     * }
     * $ar = $x->fetchAll(); 
     *   will result in only the columns requested being fetched...
     *
     *
     *
     * @param     array     Configuration
     *          exclude  Array of columns to exclude from results (eg. modified_by_id)
     *          links    The equivilant links.ini data for this table eg.
     *                    array( 'person_id' => 'person:id', .... )
     *          include  Array of columns to include
     *          distinct Array of distinct columns.
     *          
     * @return   array      info about joins
     *                      cols => map of resulting {joined_tablename}.{joined_table_column_name}
     *                      join_names => map of resulting {join_name_as}.{joined_table_column_name}
     *                      count => the column to count on.
     * @access   public
     */
    function autoJoin($cfg = array())
    {
        //var_Dump($cfg);exit;
        $pre_links = $this->links();
        if (!empty($cfg['links'])) {
            $this->links(array_merge( $pre_links , $cfg['links']));
        }
        $map = $this->links( );
        
        
        //print_r($map);
        $tabdef = $this->table();
         
        // we need this as normally it's only cleared by an empty selectAs call.
       
        
        $keys = array_keys($tabdef);
        if (!empty($cfg['exclude'])) {
            $keys = array_intersect($keys, array_diff($keys, $cfg['exclude'])); 
        }
        if (!empty($cfg['include'])) {
            
            $keys =  array_intersect($keys,  $cfg['include']); 
        }
        
        $selectAs = array();
        
        if (!empty($keys)) {
            $selectAs = array(array( $keys , '%s', false));
        }
        
        $ret = array(
            'cols' => array(),
            'join_names' => array(),
            'count' => false,
        );
        
        
        
        $has_distinct = false;
        if (!empty($cfg['distinct']) && $keys) {
            
            // reset the columsn?
            $cols = array();
            
             //echo '
' ;print_r($xx);exit;
            foreach($keys as $c) {
                //var_dump($c);
                
                if (  $cfg['distinct'] == $c) {
                    $has_distinct = 'DISTINCT( ' . $this->tableName() .'.'. $c .') as ' . $c;
                    $ret['count'] =  'DISTINCT  ' . $this->tableName() .'.'. $c .'';
                    continue;
                }
                // cols is in our filtered keys...
                $cols = $c;
                
            }
            // apply our filtered version, which excludes the distinct column.
            
            $selectAs = empty($cols) ?  array() : array(array(  $cols , '%s', false)) ;
            
            
            
        } 
                
        foreach($keys as $k) {
            $ret['cols'][$k] = $this->tableName(). '.' . $k;
        }
        
         
        
        foreach($map as $ocl=>$info) {
            
            list($tab,$col) = explode(':', $info);
            // what about multiple joins on the same table!!!
            $xx = DB_DataObject::factory($tab);
            if (!is_object($xx) || !is_a($xx, 'DB_DataObject')) {
                continue;
            }
            // skip columns that are excluded.
            
            // we ignore include here... - as
             
            // this is borked ... for multiple jions..
            $this->joinAdd($xx, 'LEFT', 'join_'.$ocl.'_'. $col, $ocl);
            
            if (!empty($cfg['exclude']) && in_array($ocl, $cfg['exclude'])) {
                continue;
            }
            
            $tabdef = $xx->table();
            $table = $xx->tableName();
            
            $keys = array_keys($tabdef);
            
            
            if (!empty($cfg['exclude'])) {
                $keys = array_intersect($keys, array_diff($keys, $cfg['exclude']));
                
                foreach($keys as $k) {
                    if (in_array($ocl.'_'.$k, $cfg['exclude'])) {
                        $keys = array_diff($keys, $k); // removes the k..
                    }
                }
                
            }
            
            if (!empty($cfg['include'])) {
                // include will basically be BASECOLNAME_joinedcolname
                $nkeys = array();
                foreach($keys as $k) {
                    if (in_array( sprintf($ocl.'_%s', $k), $cfg['include'])) {
                        $nkeys[] = $k;
                    }
                }
                $keys = $nkeys;
            }
            
            if (empty($keys)) {
                continue;
            }
            // got distinct, and not yet found it..
            if (!$has_distinct && !empty($cfg['distinct']))  {
                $cols = array();
                foreach($keys as $c) {
                    $tn = sprintf($ocl.'_%s', $c);
                      
                    if ( $tn == $cfg['distinct']) {
                        
                        $has_distinct = 'DISTINCT( ' . 'join_'.$ocl.'_'.$col.'.'.$c .')  as ' . $tn ;
                        $ret['count'] =  'DISTINCT  join_'.$ocl.'_'.$col.'.'.$c;
                       // var_dump($this->countWhat );
                        continue;
                    }
                    $cols[] = $c;
                     
                }
                
                if (!empty($cols)) {
                    $selectAs[] = array($cols, $ocl.'_%s', 'join_'.$ocl.'_'. $col);
                }
                
            } else {
                $selectAs[] = array($keys, $ocl.'_%s', 'join_'.$ocl.'_'. $col);
            }
              
            foreach($keys as $k) {
                $ret['cols'][sprintf('%s_%s', $ocl, $k)] = $tab.'.'.$k;
                $ret['join_names'][sprintf('%s_%s', $ocl, $k)] = sprintf('join_%s_%s.%s',$ocl, $col, $k);
            }
             
        }
        
        // fill in the select details..
        $this->selectAdd(); 
        
        if ($has_distinct) {
            $this->selectAdd($has_distinct);
        }
         
        foreach($selectAs as $ar) {
            
            $this->selectAs($ar[0], $ar[1], $ar[2]);
        }
        // restore links..
        $this->links( $pre_links );
        
        return $ret;
        
    }
    
    /**
     * Factory method for calling DB_DataObject_Cast
     *
     * if used with 1 argument DB_DataObject_Cast::sql($value) is called
     * 
     * if used with 2 arguments DB_DataObject_Cast::$value($callvalue) is called
     * valid first arguments are: blob, string, date, sql
     * 
     * eg. $member->updated = $member->sqlValue('NOW()');
     * 
     * 
     * might handle more arguments for escaping later...
     * 
     *
     * @param string $value (or type if used with 2 arguments)
     * @param string $callvalue (optional) used with date/null etc..
     */
    
    function sqlValue($value)
    {
        $method = 'sql';
        if (func_num_args() == 2) {
            $method = $value;
            $value = func_get_arg(1);
        }
        require_once 'DB/DataObject/Cast.php';
        return call_user_func(array('DB_DataObject_Cast', $method), $value);
        
    }
    
    
    /**
     * Copies items that are in the table definitions from an
     * array or object into the current object
     * will not override key values.
     *
     *
     * @param    array | object  $from
     * @param    string  $format eg. map xxxx_name to $object->name using 'xxxx_%s' (defaults to %s - eg. name -> $object->name
     * @param    boolean  $skipEmpty (dont assign empty values if a column is empty (eg. '' / 0 etc...)
     * @access   public
     * @return   true on success or array of key=>setValue error message
     */
    function setFrom($from, $format = '%s', $skipEmpty=false)
    {
        global $_DB_DATAOBJECT;
        $keys  = $this->keys();
        $items = $this->table();
        if (!$items) {
            $this->raiseError(
                "setFrom:Could not find table definition for {$this->tableName()}", 
                DB_DATAOBJECT_ERROR_INVALIDCONFIG);
            return;
        }
        $overload_return = array();
        foreach (array_keys($items) as $k) {
            if (in_array($k,$keys)) {
                continue; // dont overwrite keys
            }
            if (!$k) {
                continue; // ignore empty keys!!! what
            }
            
            $chk = is_object($from) &&  
                (version_compare(phpversion(), "5.1.0" , ">=") ? 
                    property_exists($from, sprintf($format,$k)) :  // php5.1
                    array_key_exists( sprintf($format,$k), get_class_vars($from)) //older
                );
            // if from has property ($format($k)      
            if ($chk) {
                $kk = (strtolower($k) == 'from') ? '_from' : $k;
                if (method_exists($this,'set'.$kk)) {
                    $ret = $this->{'set'.$kk}($from->{sprintf($format,$k)});
                    if (is_string($ret)) {
                        $overload_return[$k] = $ret;
                    }
                    continue;
                }
                $this->$k = $from->{sprintf($format,$k)};
                continue;
            }
            
            if (is_object($from)) {
                continue;
            }
            
            if (empty($from[sprintf($format,$k)]) && $skipEmpty) {
                continue;
            }
            
            if (!isset($from[sprintf($format,$k)]) && !DB_DataObject::_is_null($from, sprintf($format,$k))) {
                continue;
            }
           
            $kk = (strtolower($k) == 'from') ? '_from' : $k;
            if (method_exists($this,'set'. $kk)) {
                $ret =  $this->{'set'.$kk}($from[sprintf($format,$k)]);
                if (is_string($ret)) {
                    $overload_return[$k] = $ret;
                }
                continue;
            }
            $val = $from[sprintf($format,$k)];
            if (is_a($val, 'DB_DataObject_Cast')) {
                $this->$k = $val;
                continue;
            }
            if (is_object($val) || is_array($val)) {
                continue;
            }
            $ret = $this->fromValue($k,$val);
            if ($ret !== true)  {
                $overload_return[$k] = 'Not A Valid Value';
            }
            //$this->$k = $from[sprintf($format,$k)];
        }
        if ($overload_return) {
            return $overload_return;
        }
        return true;
    }

    /**
     * Returns an associative array from the current data
     * (kind of oblivates the idea behind DataObjects, but
     * is usefull if you use it with things like QuickForms.
     *
     * you can use the format to return things like user[key]
     * by sending it $object->toArray('user[%s]')
     *
     * will also return links converted to arrays.
     *
     * @param   string  sprintf format for array
     * @param   bool||number    [true = elemnts that have a value set],
     *                          [false = table + returned colums] ,
     *                          [0 = returned columsn only]
     *
     * @access   public
     * @return   array of key => value for row
     */

    function toArray($format = '%s', $hideEmpty = false) 
    {
        global $_DB_DATAOBJECT;
        
        // we use false to ignore sprintf.. (speed up..)
        $format = $format == '%s' ? false : $format;
        
        $ret = array();
        $rf = ($this->_resultFields !== false) ? $this->_resultFields : 
                (isset($_DB_DATAOBJECT['RESULTFIELDS'][$this->_DB_resultid]) ?
                 $_DB_DATAOBJECT['RESULTFIELDS'][$this->_DB_resultid] : false);
        
        $ar = ($rf !== false) ?
            (($hideEmpty === 0) ? $rf : array_merge($rf, $this->table())) :
            $this->table();

        foreach($ar as $k=>$v) {
             
            if (!isset($this->$k)) {
                if (!$hideEmpty) {
                    $ret[$format === false ? $k : sprintf($format,$k)] = '';
                }
                continue;
            }
            // call the overloaded getXXXX() method. - except getLink and getLinks
            if (method_exists($this,'get'.$k) && !in_array(strtolower($k),array('links','link'))) {
                $ret[$format === false ? $k : sprintf($format,$k)] = $this->{'get'.$k}();
                continue;
            }
            // should this call toValue() ???
            $ret[$format === false ? $k : sprintf($format,$k)] = $this->$k;
        }
        if (!$this->_link_loaded) {
            return $ret;
        }
        foreach($this->_link_loaded as $k) {
            $ret[$format === false ? $k : sprintf($format,$k)] = $this->$k->toArray();
        
        }
        
        return $ret;
    }

    /**
     * validate the values of the object (usually prior to inserting/updating..)
     *
     * Note: This was always intended as a simple validation routine.
     * It lacks understanding of field length, whether you are inserting or updating (and hence null key values)
     *
     * This should be moved to another class: DB_DataObject_Validate 
     *      FEEL FREE TO SEND ME YOUR VERSION FOR CONSIDERATION!!!
     *
     * Usage:
     * if (is_array($ret = $obj->validate())) { ... there are problems with the data ... }
     *
     * Logic:
     *   - defaults to only testing strings/numbers if numbers or strings are the correct type and null values are correct
     *   - validate Column methods : "validate{ROWNAME}()"  are called if they are defined.
     *            These methods should return 
     *                  true = everything ok
     *                  false|object = something is wrong!
     * 
     *   - This method loads and uses the PEAR Validate Class.
     *
     *
     * @access  public
     * @return  array of validation results (where key=>value, value=false|object if it failed) or true (if they all succeeded)
     */
    function validate()
    {
        global $_DB_DATAOBJECT;
        require_once 'Validate.php';
        $table = $this->table();
        $ret   = array();
        $seq   = $this->sequenceKey();
        $options = $_DB_DATAOBJECT['CONFIG'];
        foreach($table as $key => $val) {
            
            
            // call user defined validation always...
            $method = "Validate" . ucfirst($key);
            if (method_exists($this, $method)) {
                $ret[$key] = $this->$method();
                continue;
            }
            
            // if not null - and it's not set.......
            
            if ($val & DB_DATAOBJECT_NOTNULL && DB_DataObject::_is_null($this, $key)) {
                // dont check empty sequence key values..
                if (($key == $seq[0]) && ($seq[1] == true)) {
                    continue;
                }
                $ret[$key] = false;
                continue;
            }
            
            
             if (DB_DataObject::_is_null($this, $key)) {
                if ($val & DB_DATAOBJECT_NOTNULL) {
                    $this->debug("'null' field used for '$key', but it is defined as NOT NULL", 'VALIDATION', 4);
                    $ret[$key] = false;
                    continue;
                }
                continue;
            }

            // ignore things that are not set. ?
           
            if (!isset($this->$key)) {
                continue;
            }
            
            // if the string is empty.. assume it is ok..
            if (!is_object($this->$key) && !is_array($this->$key) && !strlen((string) $this->$key)) {
                continue;
            }
            
            // dont try and validate cast objects - assume they are problably ok..
            if (is_object($this->$key) && is_a($this->$key,'DB_DataObject_Cast')) {
                continue;
            }
            // at this point if you have set something to an object, and it's not expected
            // the Validate will probably break!!... - rightly so! (your design is broken, 
            // so issuing a runtime error like PEAR_Error is probably not appropriate..
            
            switch (true) {
                // todo: date time.....
                case  ($val & DB_DATAOBJECT_STR):
                    $ret[$key] = Validate::string($this->$key, VALIDATE_PUNCTUATION . VALIDATE_NAME);
                    continue;
                case  ($val & DB_DATAOBJECT_INT):
                    $ret[$key] = Validate::number($this->$key, array('decimal'=>'.'));
                    continue;
            }
        }
        // if any of the results are false or an object (eg. PEAR_Error).. then return the array..
        foreach ($ret as $key => $val) {
            if ($val !== true) {
                return $ret;
            }
        }
        return true; // everything is OK.
    }

    /**
     * Gets the DB object related to an object - so you can use funky peardb stuf with it :)
     *
     * @access public
     * @return object The DB connection
     */
    function getDatabaseConnection()
    {
        global $_DB_DATAOBJECT;

        if (($e = $this->_connect()) !== true) {
            return $e;
        }
        if (!isset($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5])) {
            $r = false;
            return $r;
        }
        return $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
    }
 
 
    /**
     * Gets the DB result object related to the objects active query
     *  - so you can use funky pear stuff with it - like pager for example.. :)
     *
     * @access public
     * @return object The DB result object
     */
     
    function getDatabaseResult()
    {
        global $_DB_DATAOBJECT;
        $this->_connect();
        if (!isset($_DB_DATAOBJECT['RESULTS'][$this->_DB_resultid])) {
            $r = false;
            return $r;
        }
        return $_DB_DATAOBJECT['RESULTS'][$this->_DB_resultid];
    }

    /**
     * Overload Extension support
     *  - enables setCOLNAME/getCOLNAME
     *  if you define a set/get method for the item it will be called.
     * otherwise it will just return/set the value.
     * NOTE this currently means that a few Names are NO-NO's 
     * eg. links,link,linksarray, from, Databaseconnection,databaseresult
     *
     * note 
     *  - set is automatically called by setFrom.
     *   - get is automatically called by toArray()
     *  
     * setters return true on success. = strings on failure
     * getters return the value!
     *
     * this fires off trigger_error - if any problems.. pear_error, 
     * has problems with 4.3.2RC2 here
     *
     * @access public
     * @return true?
     * @see overload
     */

    
    function _call($method,$params,&$return) {
        
        //$this->debug("ATTEMPTING OVERLOAD? $method");
        // ignore constructors : - mm
        if (strtolower($method) == strtolower(get_class($this))) {
            return true;
        }
        $type = strtolower(substr($method,0,3));
        $class = get_class($this);
        if (($type != 'set') && ($type != 'get')) {
            return false;
        }
         
        
        
        // deal with naming conflick of setFrom = this is messy ATM!
        
        if (strtolower($method) == 'set_from') {
            $return = $this->toValue('from',isset($params[0]) ? $params[0] : null);
            return  true;
        }
        
        $element = substr($method,3);
        
        // dont you just love php's case insensitivity!!!!
        
        $array =  array_keys(get_class_vars($class));
        /* php5 version which segfaults on 5.0.3 */
        if (class_exists('ReflectionClass')) {
            $reflection = new ReflectionClass($class);
            $array = array_keys($reflection->getdefaultProperties());
        }
        
        if (!in_array($element,$array)) {
            // munge case
            foreach($array as $k) {
                $case[strtolower($k)] = $k;
            }
            if ((substr(phpversion(),0,1) == 5) && isset($case[strtolower($element)])) {
                file_put_contents('/tmp/backtrace', var_export(debug_backtrace(),true));
                trigger_error("PHP5 set/get calls should match the case of the variable",E_USER_WARNING);
                $element = strtolower($element);
            }
            
            // does it really exist?
            if (!isset($case[$element])) {
                return false;            
            }
            // use the mundged case
            $element = $case[$element]; // real case !
        }
        
        
        if ($type == 'get') {
            $return = $this->toValue($element,isset($params[0]) ? $params[0] : null);
            return true;
        }
        
        
        $return = $this->fromValue($element, $params[0]);
         
        return true;
            
          
    }
        
    
    /**
    * standard set* implementation.
    *
    * takes data and uses it to set dates/strings etc.
    * normally called from __call..  
    *
    * Current supports
    *   date      = using (standard time format, or unixtimestamp).... so you could create a method :
    *               function setLastread($string) { $this->fromValue('lastread',strtotime($string)); }
    *
    *   time      = using strtotime 
    *   datetime  = using  same as date - accepts iso standard or unixtimestamp.
    *   string    = typecast only..
    * 
    * TODO: add formater:: eg. d/m/Y for date! ???
    *
    * @param   string       column of database
    * @param   mixed        value to assign
    *
    * @return   true| false     (False on error)
    * @access   public 
    * @see      DB_DataObject::_call
    */
  
    
    function fromValue($col,$value) 
    {
        global $_DB_DATAOBJECT;
        $options = $_DB_DATAOBJECT['CONFIG'];
        $cols = $this->table();
        // dont know anything about this col..
        if (!isset($cols[$col]) || is_a($value, 'DB_DataObject_Cast')) {
            $this->$col = $value;
            return true;
        }
        //echo "FROM VALUE $col, {$cols[$col]}, $value\n";
        switch (true) {
            // set to null and column is can be null...
            case ((!($cols[$col] & DB_DATAOBJECT_NOTNULL)) && DB_DataObject::_is_null($value, false)):
            case (is_object($value) && is_a($value,'DB_DataObject_Cast')): 
                $this->$col = $value;
                return true;
                
            // fail on setting null on a not null field..
            case (($cols[$col] & DB_DATAOBJECT_NOTNULL) && DB_DataObject::_is_null($value,false)):

                return false;
        
            case (($cols[$col] & DB_DATAOBJECT_DATE) &&  ($cols[$col] & DB_DATAOBJECT_TIME)):
                // empty values get set to '' (which is inserted/updated as NULl
                if (!$value) {
                    $this->$col = '';
                }
            
                if (is_numeric($value)) {
                    $this->$col = date('Y-m-d H:i:s', $value);
                    return true;
                }
              
                // eak... - no way to validate date time otherwise...
                $this->$col = (string) $value;
                return true;
            
            case ($cols[$col] & DB_DATAOBJECT_DATE):
                // empty values get set to '' (which is inserted/updated as NULl
                 
                if (!$value) {
                    $this->$col = '';
                    return true; 
                }
            
                if (is_numeric($value)) {
                    $this->$col = date('Y-m-d',$value);
                    return true;
                }
                 
                // try date!!!!
                require_once 'Date.php';
                $x = new Date($value);
                $this->$col = $x->format("%Y-%m-%d");
                return true;
            
            case ($cols[$col] & DB_DATAOBJECT_TIME):
                // empty values get set to '' (which is inserted/updated as NULl
                if (!$value) {
                    $this->$col = '';
                }
            
                $guess = strtotime($value);
                if ($guess != -1) {
                     $this->$col = date('H:i:s', $guess);
                    return $return = true;
                }
                // otherwise an error in type...
                return false;
            
            case ($cols[$col] & DB_DATAOBJECT_STR):
                
                $this->$col = (string) $value;
                return true;
                
            // todo : floats numerics and ints...
            default:
                $this->$col = $value;
                return true;
        }
    
    
    
    }
     /**
    * standard get* implementation.
    *
    *  with formaters..
    * supported formaters:  
    *   date/time : %d/%m/%Y (eg. php strftime) or pear::Date 
    *   numbers   : %02d (eg. sprintf)
    *  NOTE you will get unexpected results with times like 0000-00-00 !!!
    *
    *
    * 
    * @param   string       column of database
    * @param   format       foramt
    *
    * @return   true     Description
    * @access   public 
    * @see      DB_DataObject::_call(),strftime(),Date::format()
    */
    function toValue($col,$format = null) 
    {
        if (is_null($format)) {
            return $this->$col;
        }
        $cols = $this->table();
        switch (true) {
            case (($cols[$col] & DB_DATAOBJECT_DATE) &&  ($cols[$col] & DB_DATAOBJECT_TIME)):
                if (!$this->$col) {
                    return '';
                }
                $guess = strtotime($this->$col);
                if ($guess != -1) {
                    return strftime($format, $guess);
                }
                // eak... - no way to validate date time otherwise...
                return $this->$col;
            case ($cols[$col] & DB_DATAOBJECT_DATE):
                if (!$this->$col) {
                    return '';
                } 
                $guess = strtotime($this->$col);
                if ($guess != -1) {
                    return strftime($format,$guess);
                }
                // try date!!!!
                require_once 'Date.php';
                $x = new Date($this->$col);
                return $x->format($format);
                
            case ($cols[$col] & DB_DATAOBJECT_TIME):
                if (!$this->$col) {
                    return '';
                }
                $guess = strtotime($this->$col);
                if ($guess > -1) {
                    return strftime($format, $guess);
                }
                // otherwise an error in type...
                return $this->$col;
                
            case ($cols[$col] &  DB_DATAOBJECT_MYSQLTIMESTAMP):
                if (!$this->$col) {
                    return '';
                }
                require_once 'Date.php';
                
                $x = new Date($this->$col);
                
                return $x->format($format);
            
             
            case ($cols[$col] &  DB_DATAOBJECT_BOOL):
                
                if ($cols[$col] &  DB_DATAOBJECT_STR) {
                    // it's a 't'/'f' !
                    return ($this->$col === 't');
                }
                return (bool) $this->$col;
            
               
            default:
                return sprintf($format,$this->col);
        }
            

    }
    
    
    /* ----------------------- Debugger ------------------ */

    /**
     * Debugger. - use this in your extended classes to output debugging information.
     *
     * Uses DB_DataObject::DebugLevel(x) to turn it on
     *
     * @param    string $message - message to output
     * @param    string $logtype - bold at start
     * @param    string $level   - output level
     * @access   public
     * @return   none
     */
    function debug($message, $logtype = 0, $level = 1)
    {
        global $_DB_DATAOBJECT;

        if (empty($_DB_DATAOBJECT['CONFIG']['debug'])  || 
            (is_numeric($_DB_DATAOBJECT['CONFIG']['debug']) &&  $_DB_DATAOBJECT['CONFIG']['debug'] < $level)) {
            return;
        }
        // this is a bit flaky due to php's wonderfull class passing around crap..
        // but it's about as good as it gets..
        $class = (isset($this) && is_a($this,'DB_DataObject')) ? get_class($this) : 'DB_DataObject';
        
        if (!is_string($message)) {
            $message = print_r($message,true);
        }
        if (!is_numeric( $_DB_DATAOBJECT['CONFIG']['debug']) && is_callable( $_DB_DATAOBJECT['CONFIG']['debug'])) {
            return call_user_func($_DB_DATAOBJECT['CONFIG']['debug'], $class, $message, $logtype, $level);
        }
        
        if (!ini_get('html_errors')) {
            echo "$class   : $logtype       : $message\n";
            flush();
            return;
        }
        if (!is_string($message)) {
            $message = print_r($message,true);
        }
        $colorize = ($logtype == 'ERROR') ? '' : '';
        echo "{$colorize}$class: $logtype: ". nl2br(htmlspecialchars($message)) . "
\n";
    }

    /**
     * sets and returns debug level
     * eg. DB_DataObject::debugLevel(4);
     *
     * @param   int     $v  level
     * @access  public
     * @return  none
     */
    function debugLevel($v = null)
    {
        global $_DB_DATAOBJECT;
        if (empty($_DB_DATAOBJECT['CONFIG'])) {
            DB_DataObject::_loadConfig();
        }
        if ($v !== null) {
            $r = isset($_DB_DATAOBJECT['CONFIG']['debug']) ? $_DB_DATAOBJECT['CONFIG']['debug'] : 0;
            $_DB_DATAOBJECT['CONFIG']['debug']  = $v;
            return $r;
        }
        return isset($_DB_DATAOBJECT['CONFIG']['debug']) ? $_DB_DATAOBJECT['CONFIG']['debug'] : 0;
    }

    /**
     * Last Error that has occured
     * - use $this->_lastError or
     * $last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
     *
     * @access  public
     * @var     object PEAR_Error (or false)
     */
    var $_lastError = false;

    /**
     * Default error handling is to create a pear error, but never return it.
     * if you need to handle errors you should look at setting the PEAR_Error callback
     * this is due to the fact it would wreck havoc on the internal methods!
     *
     * @param  int $message    message
     * @param  int $type       type
     * @param  int $behaviour  behaviour (die or continue!);
     * @access public
     * @return error object
     */
    function raiseError($message, $type = null, $behaviour = null)
    {
        global $_DB_DATAOBJECT;
        
        if ($behaviour == PEAR_ERROR_DIE && !empty($_DB_DATAOBJECT['CONFIG']['dont_die'])) {
            $behaviour = null;
        }
        $error = PEAR::getStaticProperty('DB_DataObject','lastError');
        
      
        // no checks for production here?....... - we log  errors before we throw them.
        DB_DataObject::debug($message,'ERROR',1);
        
        
        if (PEAR::isError($message)) {
            $error = $message;
        } else {
            require_once 'DB/DataObject/Error.php';
            $error = PEAR::raiseError($message, $type, $behaviour,
                            $opts=null, $userinfo=null, 'DB_DataObject_Error'
                        );
        }
        // this will never work totally with PHP's object model.
        // as this is passed on static calls (like staticGet in our case)
 
        $_DB_DATAOBJECT['LASTERROR'] = $error;
        
        if (isset($this) && is_object($this) && is_subclass_of($this,'db_dataobject')) {
            $this->_lastError = $error;
        }
   
        return $error;
    }

    /**
     * Define the global $_DB_DATAOBJECT['CONFIG'] as an alias to  PEAR::getStaticProperty('DB_DataObject','options');
     *
     * After Profiling DB_DataObject, I discoved that the debug calls where taking
     * considerable time (well 0.1 ms), so this should stop those calls happening. as
     * all calls to debug are wrapped with direct variable queries rather than actually calling the funciton
     * THIS STILL NEEDS FURTHER INVESTIGATION
     *
     * @access   public
     * @return   object an error object
     */
    function _loadConfig()
    {
        global $_DB_DATAOBJECT;

        $_DB_DATAOBJECT['CONFIG'] = &PEAR::getStaticProperty('DB_DataObject','options');


    }
     /**
     * Free global arrays associated with this object.
     *
     *
     * @access   public
     * @return   none
     */
    function free() 
    {
        global $_DB_DATAOBJECT;
          
        if (isset($_DB_DATAOBJECT['RESULTFIELDS'][$this->_DB_resultid])) {
            unset($_DB_DATAOBJECT['RESULTFIELDS'][$this->_DB_resultid]);
        }
        if (isset($_DB_DATAOBJECT['RESULTS'][$this->_DB_resultid])) {     
            unset($_DB_DATAOBJECT['RESULTS'][$this->_DB_resultid]);
        }
        // clear the staticGet cache as well.
        $this->_clear_cache();
        // this is a huge bug in DB!
        if (isset($_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5])) {
            $_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5]->num_rows = array();
        }

        if (is_array($this->_link_loaded)) {
            foreach ($this->_link_loaded as $do) {
                $do->free();
            }
        }

        
    }
    /**
    * Evaluate whether or not a value is set to null, taking the 'disable_null_strings' option into account.
    * If the value is a string set to "null" and the "disable_null_strings" option is not set to 
    * true, then the value is considered to be null.
    * If the value is actually a PHP NULL value, and "disable_null_strings" has been set to 
    * the value "full", then it will also be considered null. - this can not differenticate between not set
    * 
    * 
    * @param  object|array $obj_or_ar 
    * @param  string|false $prop prperty
    
    * @access private
    * @return bool  object
    */
    function _is_null($obj_or_ar , $prop) 
    {
    	global $_DB_DATAOBJECT;
    	
        
        $isset = $prop === false ? isset($obj_or_ar) : 
            (is_array($obj_or_ar) ? isset($obj_or_ar[$prop]) : isset($obj_or_ar->$prop));
        
        $value = $isset ? 
            ($prop === false ? $obj_or_ar : 
                (is_array($obj_or_ar) ? $obj_or_ar[$prop] : $obj_or_ar->$prop))
            : null;
        
        
        
    	$options = $_DB_DATAOBJECT['CONFIG'];
    	
        $null_strings = !isset($options['disable_null_strings'])
                    || $options['disable_null_strings'] === false;
                    
        $crazy_null = isset($options['disable_null_strings'])
                && is_string($options['disable_null_strings'])
                && strtolower($options['disable_null_strings'] === 'full');
        
        if ( $null_strings && $isset  && is_string($value)  && (strtolower($value) === 'null') ) {
            return true;
        }
        
        if ( $crazy_null && !$isset )  {
        	return true;
        }
        
        return false;
        
    	
    }
    
    /**
     * (deprecated - use ::get / and your own caching method)
     */
    function staticGet($class, $k, $v = null)
    {
        $lclass = strtolower($class);
        global $_DB_DATAOBJECT;
        if (empty($_DB_DATAOBJECT['CONFIG'])) {
            DB_DataObject::_loadConfig();
        }

        

        $key = "$k:$v";
        if ($v === null) {
            $key = $k;
        }
        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            DB_DataObject::debug("$class $key","STATIC GET - TRY CACHE");
        }
        if (!empty($_DB_DATAOBJECT['CACHE'][$lclass][$key])) {
            return $_DB_DATAOBJECT['CACHE'][$lclass][$key];
        }
        if (!empty($_DB_DATAOBJECT['CONFIG']['debug'])) {
            DB_DataObject::debug("$class $key","STATIC GET - NOT IN CACHE");
        }

        $obj = DB_DataObject::factory(substr($class,strlen($_DB_DATAOBJECT['CONFIG']['class_prefix'])));
        if (PEAR::isError($obj)) {
            DB_DataObject::raiseError("could not autoload $class", DB_DATAOBJECT_ERROR_NOCLASS);
            $r = false;
            return $r;
        }
        
        if (!isset($_DB_DATAOBJECT['CACHE'][$lclass])) {
            $_DB_DATAOBJECT['CACHE'][$lclass] = array();
        }
        if (!$obj->get($k,$v)) {
            DB_DataObject::raiseError("No Data return from get $k $v", DB_DATAOBJECT_ERROR_NODATA);
            
            $r = false;
            return $r;
        }
        $_DB_DATAOBJECT['CACHE'][$lclass][$key] = $obj;
        return $_DB_DATAOBJECT['CACHE'][$lclass][$key];
    }
    
    /**
     * autoload Class relating to a table
     * (deprecited - use ::factory)
     *
     * @param  string  $table  table
     * @access private
     * @return string classname on Success
     */
    function staticAutoloadTable($table)
    {
        global $_DB_DATAOBJECT;
        if (empty($_DB_DATAOBJECT['CONFIG'])) {
            DB_DataObject::_loadConfig();
        }
        $p = isset($_DB_DATAOBJECT['CONFIG']['class_prefix']) ?
            $_DB_DATAOBJECT['CONFIG']['class_prefix'] : '';
        $class = $p . preg_replace('/[^A-Z0-9]/i','_',ucfirst($table));
        
        $ce = substr(phpversion(),0,1) > 4 ? class_exists($class,false) : class_exists($class);
        $class = $ce ? $class  : DB_DataObject::_autoloadClass($class);
        return $class;
    }
    
    /* ---- LEGACY BC METHODS - NOT DOCUMENTED - See Documentation on New Methods. ---*/
    
    function _get_table() { return $this->table(); }
    function _get_keys()  { return $this->keys();  }
    
    
    
    
}
// technially 4.3.2RC1 was broken!!
// looks like 4.3.3 may have problems too....
if (!defined('DB_DATAOBJECT_NO_OVERLOAD')) {

    if ((phpversion() != '4.3.2-RC1') && (version_compare( phpversion(), "4.3.1") > 0)) {
        if (version_compare( phpversion(), "5") < 0) {
           overload('DB_DataObject');
        } 
        $GLOBALS['_DB_DATAOBJECT']['OVERLOADED'] = true;
    }
}