Source for file jDbConnection.class.php

Documentation is available at jDbConnection.class.php

<?php
/**
* @package jelix
* @subpackage db
* @author Laurent Jouanneau
* @contributor Julien Issler
*
* This class was get originally from the Copix project (CopixDbConnection, Copix 2.3dev20050901, http://www.copix.org)
* However only few lines of code are still copyrighted 2001-2005 CopixTeam (LGPL licence).
* Initial authors of this Copix classes are Gerald Croes and Laurent Jouanneau,
* and this class was adapted/improved for Jelix by Laurent Jouanneau
*
* @link http://www.jelix.org
* @licence http://www.gnu.org/licenses/lgpl.html GNU Lesser General Public Licence, see LICENCE file
*/
/**
* @package jelix
* @subpackage db
*/
abstract class jDbConnection {
/**
* profil properties used by the connector
* @var array
*/
public $profil;
/**
* The database type name (mysql, pgsql ...)
*/
public $dbms;
/**
* The last error message if any
* @var string
*/
public $msgError = '';
/**
* last executed query
*/
public $lastQuery;
/**
* Are we using an automatic commit ?
* @var boolean
*/
private $_autocommit = true;
/**
* the internal connection.
*/
protected $_connection = null;
/**
* do a connection to the database, using properties of the given profil
* @param array $profil profil properties
*/
function __construct($profil){
$this->profil = & $profil;
$this->dbms = $profil['driver'];
$this->_connection = $this->_connect();
}
function __destruct(){
if($this->_connection !== null){
$this->_disconnect ();
}
}
/**
* Launch a SQL Query which returns rows (typically, a SELECT statement)
* @param string $queryString the SQL query
* @return jDbResultSet|boolean False if the query has failed.
*/
public function query ($queryString){
$this->lastQuery = $queryString;
$result = $this->_doQuery ($queryString);
return $result;
}
/**
* Launch a SQL Query with limit parameter (so only a subset of a result)
* @param string $queryString the SQL query
* @param integer $limitOffset the offset of the first row to return
* @param integer $limitCount the maximum of number of rows to return
* @return jDbResultSet|boolean SQL Select. False if the query has failed.
*/
public function limitQuery ($queryString, $limitOffset, $limitCount){
$this->lastQuery = $queryString;
$result = $this->_doLimitQuery ($queryString, intval($limitOffset), intval($limitCount));
return $result;
}
/**
* Launch a SQL Query (update, delete..) which doesn't return rows
* @param string $query the SQL query
* @return integer the number of affected rows. False if the query has failed.
*/
public function exec ($query){
$this->lastQuery = $query;
$result = $this->_doExec ($query);
return $result;
}
/**
* Escape and quotes strings. if null, will only return the text "NULL"
* @param string $text string to quote
* @param boolean $checknull if true, check if $text is a null value, and then return NULL
* @return string escaped string
*/
public function quote($text, $checknull=true){
if($checknull)
return (is_null ($text) ? 'NULL' : "'".$this->_quote($text)."'");
else
return "'".$this->_quote ($text)."'";
}
/**
* Prefix the given table with the prefix specified in the connection's profile
* If there's no prefix for the connection's profile, return the table's name unchanged.
*
* @param string $table the table's name
* @return string the prefixed table's name
* @author Julien Issler
* @since 1.0
*/
public function prefixTable($table_name){
if(!isset($this->profil['table_prefix']))
return $table_name;
return $this->profil['table_prefix'].$table_name;
}
/**
* Check if the current connection has a table prefix set
*
* @return boolean
* @author Julien Issler
* @since 1.0
*/
public function hasTablePrefix(){
return (isset($this->profil['table_prefix']) && $this->profil['table_prefix'] != '');
}
/**
* sets the autocommit state
* @param boolean state the status of autocommit
*/
public function setAutoCommit($state=true){
$this->_autocommit = $state;
$this->_autoCommitNotify ($this->_autocommit);
}
/**
* begin a transaction. Call it after doQuery, doLimitQuery, doExec,
* And then commit() or rollback()
*/
abstract public function beginTransaction ();
/**
* validate all queries and close a transaction
*/
abstract public function commit ();
/**
* cancel all queries of a transaction and close the transaction
*/
abstract public function rollback ();
/**
* prepare a query
* @param string $query a sql query with parameters
* @return statement a statement
*/
abstract public function prepare ($query);
/**
* @return string the last error description
*/
abstract public function errorInfo();
/**
* @return integer the last error code
*/
abstract public function errorCode();
/**
* return the id value of the last inserted row.
* Some driver need a sequence name, so give it at first parameter
* @param string $fromSequence the sequence name
* @return integer the id value
*/
abstract public function lastInsertId($fromSequence='');
/**
* Not implemented
* @param integer $id the attribut id
* @return string the attribute value
*/
public function getAttribute($id){ return '';}
/**
* Not implemented
* @param integer $id the attribut id
* @param string $value the attribute value
*/
public function setAttribute($id, $value){ }
/**
*
*/
public function lastIdInTable($fieldName, $tableName){
$rs = $this->query ('SELECT MAX('.$fieldName.') as ID FROM '.$tableName);
if (($rs !== null) && $r = $rs->fetch ()){
return $r->ID;
}
return 0;
}
/**
* Notify the changes on autocommit
* Drivers may overload this
* @param boolean state the new state of autocommit
*/
abstract protected function _autoCommitNotify ($state);
/**
* return a connection identifier or false/null if there is an error
* @return integer connection identifier
*/
abstract protected function _connect ();
/**
* do a disconnection
* (no need to do a test on the connection id)
*/
abstract protected function _disconnect ();
/**
* do a query which return results
* @return jDbResultSet/boolean
*/
abstract protected function _doQuery ($queryString);
/**
* do a query which return nothing
* @return jDbResultSet/boolean
*/
abstract protected function _doExec ($queryString);
/**
* do a query which return a limited number of results
* @return jDbResultSet/boolean
*/
abstract protected function _doLimitQuery ($queryString, $offset, $number);
/**
* do the escaping of a string.
* you should override it into the driver
*/
protected function _quote($text){
return addslashes($text);
}
}
?>

Documentation generated on Wed, 07 Sep 2011 13:47:11 +0200 by phpDocumentor 1.4.3