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Added basic structure of MySQL statement parsers.

Dieser Commit ist enthalten in:
D4rk4ng3l 2011-06-18 11:10:40 +00:00
Ursprung a211f7b334
Commit 55aa7889e5
8 geänderte Dateien mit 291 neuen und 1 gelöschten Zeilen

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@ -1,9 +1,36 @@
<?php <?php
/**
* This file is part of MySQLDumper released under the GNU/GPL 2 license
* http://www.mysqldumper.net
*
* @package MySQLDumper
* @subpackage SQL-Browser
* @version SVN: $Rev: 1227 $
* @author $Author: DSB $
*/
require_once "Msd/Sql/Parser/Interface.php";
/**
* Class to parse MySQL queries.
* This enables you to analyze and modify MySQL queries, which the user has entered.
*
* @package MySQLDumper
* @subpackage SQL-Browser
*/
class Msd_Sql_Parser class Msd_Sql_Parser
{ {
/**
* Saves the raw MySQL Query.
*
* @var string
*/
private $_rawQuery = null; private $_rawQuery = null;
/**
* Available MySQL statements, divided and sorted by their length.
*
* @var array
*/
protected $_sqlStatements = array( protected $_sqlStatements = array(
2 => array( 2 => array(
'do', 'xa' 'do', 'xa'
@ -35,10 +62,21 @@ class Msd_Sql_Parser
), ),
); );
/**
* MySQL comment types.
*
* @var array
*/
protected $_sqlComments = array( protected $_sqlComments = array(
'--' => "\n", '/*' => '*/' '--' => "\n", '/*' => '*/'
); );
/**
* Class constructor.
* Creates a new instance of the MySQL parser and optionally assign the raw MySQL query.
*
* @param string $sqlQuery Raw MySQL query to parse
*/
public function __construct($sqlQuery = null) public function __construct($sqlQuery = null)
{ {
if ($sqlQuery !== null) { if ($sqlQuery !== null) {
@ -46,6 +84,16 @@ class Msd_Sql_Parser
} }
} }
/**
* Parses a raw MySQL query.
* This could include more than one MySQL statement.
*
* @throws Msd_Sql_Parser_Exception
*
* @param string $sqlQuery Raw MySQL query to parse
*
* @return void
*/
public function parse($sqlQuery = null) public function parse($sqlQuery = null)
{ {
if ($sqlQuery === null) { if ($sqlQuery === null) {
@ -87,13 +135,23 @@ class Msd_Sql_Parser
include_once 'Msd/Sql/Parser/Exception.php'; include_once 'Msd/Sql/Parser/Exception.php';
throw new Msd_Sql_Parser_Exception("Unknown MySQL statement is found: '$statement'"); throw new Msd_Sql_Parser_Exception("Unknown MySQL statement is found: '$statement'");
} }
$parserClass = 'Msd_Sql_Parser_' . ucwords($statement); $parserClass = 'Msd_Sql_Parser_Statement_' . ucwords($statement);
$endPos = $this->_getStatementEndPos($sqlQuery, $startPos); $endPos = $this->_getStatementEndPos($sqlQuery, $startPos);
$completeStatement = trim(substr($sqlQuery, $startPos, $endPos - $startPos)); $completeStatement = trim(substr($sqlQuery, $startPos, $endPos - $startPos));
$startPos = $endPos + 1; $startPos = $endPos + 1;
$this->_parseStatement($completeStatement, $parserClass);
} }
} }
/**
* Searches the end of a MySQL statement and returns its position.
*
* @param string $sqlQuery The complete MySQL query
* @param int $startPos Index, where to start the search.
*
* @return int End position of the statement
*/
private function _getStatementEndPos($sqlQuery, $startPos = 0) private function _getStatementEndPos($sqlQuery, $startPos = 0)
{ {
$nextString = strpos($sqlQuery, "'", $startPos); $nextString = strpos($sqlQuery, "'", $startPos);
@ -117,4 +175,25 @@ class Msd_Sql_Parser
return $nextSemicolon; return $nextSemicolon;
} }
/**
* Creates an instance of a statement parser class and invokes statement parsing.
*
* @param string $statement MySQL statement to parse
* @param string $parserClass Parser class to use
*
* @return void
*/
private function _parseStatement($statement, $parserClass)
{
$classFilename = str_replace('_', '/', $parserClass) . '.php';
include_once $classFilename;
$parserObject = new $parserClass;
if (!$parserObject instanceof Msd_Sql_Parser_Interface) {
throw new Msd_Sql_Parser_Exception('The given parser class must implement Msd_Sql_Parser_Interface!');
}
$parserObject->parse($statement);
}
} }

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@ -1,4 +1,20 @@
<?php <?php
/**
* This file is part of MySQLDumper released under the GNU/GPL 2 license
* http://www.mysqldumper.net
*
* @package MySQLDumper
* @subpackage SQL-Browser
* @version SVN: $Rev: 1227 $
* @author $Author: DSB $
*/
require_once 'Msd/Exception.php'; require_once 'Msd/Exception.php';
/**
* Exception class for all SQL-Parser exceptions.
*
* @package MySQLDumper
* @subpackage SQL-Browser
*/
class Msd_Sql_Parser_Exception extends Msd_Exception class Msd_Sql_Parser_Exception extends Msd_Exception
{ } { }

Datei anzeigen

@ -0,0 +1,30 @@
<?php
/**
* This file is part of MySQLDumper released under the GNU/GPL 2 license
* http://www.mysqldumper.net
*
* @package MySQLDumper
* @subpackage SQL-Browser
* @version SVN: $Rev: 1227 $
* @author $Author: DSB $
*/
/**
* Interface definition for MySQL statement parsers.
*
* @package MySQLDumper
* @subpackage SQL-Browser
*/
interface Msd_Sql_Parser_Interface
{
/**
* Parse the statement.
*
* @abstract
*
* @param string $statement MySQL INSERT statement.
*
* @return void
*/
public function parse($statement);
}

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@ -0,0 +1,33 @@
<?php
/**
* This file is part of MySQLDumper released under the GNU/GPL 2 license
* http://www.mysqldumper.net
*
* @package MySQLDumper
* @subpackage SQL-Browser
* @version SVN: $Rev: 1227 $
* @author $Author: DSB $
*/
require_once "Msd/Sql/Parser/Interface.php";
/**
* Class to parse MySQL CREATE statements.
* This enables you to analyze and modify MySQL queries, which the user has entered.
*
* @package MySQLDumper
* @subpackage SQL-Browser
*/
class Msd_Sql_Parser_Statement_Create implements Msd_Sql_Parser_Interface
{
/**
* Parse the statement.
*
* @param string $statement MySQL INSERT statement.
*
* @return void
*/
public function parse($statement)
{
echo "$statement\n";
}
}

Datei anzeigen

@ -0,0 +1,33 @@
<?php
/**
* This file is part of MySQLDumper released under the GNU/GPL 2 license
* http://www.mysqldumper.net
*
* @package MySQLDumper
* @subpackage SQL-Browser
* @version SVN: $Rev: 1227 $
* @author $Author: DSB $
*/
require_once "Msd/Sql/Parser/Interface.php";
/**
* Class to parse MySQL DROP statements.
* This enables you to analyze and modify MySQL queries, which the user has entered.
*
* @package MySQLDumper
* @subpackage SQL-Browser
*/
class Msd_Sql_Parser_Statement_Drop implements Msd_Sql_Parser_Interface
{
/**
* Parse the statement.
*
* @param string $statement MySQL INSERT statement.
*
* @return void
*/
public function parse($statement)
{
echo "$statement\n";
}
}

Datei anzeigen

@ -0,0 +1,33 @@
<?php
/**
* This file is part of MySQLDumper released under the GNU/GPL 2 license
* http://www.mysqldumper.net
*
* @package MySQLDumper
* @subpackage SQL-Browser
* @version SVN: $Rev: 1227 $
* @author $Author: DSB $
*/
require_once "Msd/Sql/Parser/Interface.php";
/**
* Class to parse MySQL INSERT statements.
* This enables you to analyze and modify MySQL queries, which the user has entered.
*
* @package MySQLDumper
* @subpackage SQL-Browser
*/
class Msd_Sql_Parser_Statement_Insert implements Msd_Sql_Parser_Interface
{
/**
* Parse the statement.
*
* @param string $statement MySQL INSERT statement.
*
* @return void
*/
public function parse($statement)
{
echo "$statement\n";
}
}

Datei anzeigen

@ -0,0 +1,33 @@
<?php
/**
* This file is part of MySQLDumper released under the GNU/GPL 2 license
* http://www.mysqldumper.net
*
* @package MySQLDumper
* @subpackage SQL-Browser
* @version SVN: $Rev: 1227 $
* @author $Author: DSB $
*/
require_once "Msd/Sql/Parser/Interface.php";
/**
* Class to parse MySQL LOCK statements.
* This enables you to analyze and modify MySQL queries, which the user has entered.
*
* @package MySQLDumper
* @subpackage SQL-Browser
*/
class Msd_Sql_Parser_Statement_Lock implements Msd_Sql_Parser_Interface
{
/**
* Parse the statement.
*
* @param string $statement MySQL INSERT statement.
*
* @return void
*/
public function parse($statement)
{
echo "$statement\n";
}
}

Datei anzeigen

@ -0,0 +1,33 @@
<?php
/**
* This file is part of MySQLDumper released under the GNU/GPL 2 license
* http://www.mysqldumper.net
*
* @package MySQLDumper
* @subpackage SQL-Browser
* @version SVN: $Rev: 1227 $
* @author $Author: DSB $
*/
require_once "Msd/Sql/Parser/Interface.php";
/**
* Class to parse MySQL UNLOCK statements.
* This enables you to analyze and modify MySQL queries, which the user has entered.
*
* @package MySQLDumper
* @subpackage SQL-Browser
*/
class Msd_Sql_Parser_Statement_Unlock implements Msd_Sql_Parser_Interface
{
/**
* Parse the statement.
*
* @param string $statement MySQL INSERT statement.
*
* @return void
*/
public function parse($statement)
{
echo "$statement\n";
}
}