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 <?php
 
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Db
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 
 /**
  * Class for connecting to SQL databases and performing common operations.
  *
  * @category   Zend
  * @package    Zend_Db
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Db
 {
 
     /**
      * Use the PROFILER constant in the config of a Zend_Db_Adapter.
      */
     const PROFILER = 'profiler';
 
     /**
      * Use the CASE_FOLDING constant in the config of a Zend_Db_Adapter.
      */
     const CASE_FOLDING = 'caseFolding';
 
     /**
      * Use the FETCH_MODE constant in the config of a Zend_Db_Adapter.
      */
     const FETCH_MODE = 'fetchMode';
 
     /**
      * Use the AUTO_QUOTE_IDENTIFIERS constant in the config of a Zend_Db_Adapter.
      */
     const AUTO_QUOTE_IDENTIFIERS = 'autoQuoteIdentifiers';
 
     /**
      * Use the ALLOW_SERIALIZATION constant in the config of a Zend_Db_Adapter.
      */
     const ALLOW_SERIALIZATION = 'allowSerialization';
 
     /**
      * Use the AUTO_RECONNECT_ON_UNSERIALIZE constant in the config of a Zend_Db_Adapter.
      */
     const AUTO_RECONNECT_ON_UNSERIALIZE = 'autoReconnectOnUnserialize';
 
     /**
      * Use the INT_TYPE, BIGINT_TYPE, and FLOAT_TYPE with the quote() method.
      */
     const INT_TYPE    = 0;
     const BIGINT_TYPE = 1;
     const FLOAT_TYPE  = 2;
 
     /**
      * PDO constant values discovered by this script result:
      *
      * $list = array(
      *    'PARAM_BOOL', 'PARAM_NULL', 'PARAM_INT', 'PARAM_STR', 'PARAM_LOB',
      *    'PARAM_STMT', 'PARAM_INPUT_OUTPUT', 'FETCH_LAZY', 'FETCH_ASSOC',
      *    'FETCH_NUM', 'FETCH_BOTH', 'FETCH_OBJ', 'FETCH_BOUND',
      *    'FETCH_COLUMN', 'FETCH_CLASS', 'FETCH_INTO', 'FETCH_FUNC',
      *    'FETCH_GROUP', 'FETCH_UNIQUE', 'FETCH_CLASSTYPE', 'FETCH_SERIALIZE',
      *    'FETCH_NAMED', 'ATTR_AUTOCOMMIT', 'ATTR_PREFETCH', 'ATTR_TIMEOUT',
      *    'ATTR_ERRMODE', 'ATTR_SERVER_VERSION', 'ATTR_CLIENT_VERSION',
      *    'ATTR_SERVER_INFO', 'ATTR_CONNECTION_STATUS', 'ATTR_CASE',
      *    'ATTR_CURSOR_NAME', 'ATTR_CURSOR', 'ATTR_ORACLE_NULLS',
      *    'ATTR_PERSISTENT', 'ATTR_STATEMENT_CLASS', 'ATTR_FETCH_TABLE_NAMES',
      *    'ATTR_FETCH_CATALOG_NAMES', 'ATTR_DRIVER_NAME',
      *    'ATTR_STRINGIFY_FETCHES', 'ATTR_MAX_COLUMN_LEN', 'ERRMODE_SILENT',
      *    'ERRMODE_WARNING', 'ERRMODE_EXCEPTION', 'CASE_NATURAL',
      *    'CASE_LOWER', 'CASE_UPPER', 'NULL_NATURAL', 'NULL_EMPTY_STRING',
      *    'NULL_TO_STRING', 'ERR_NONE', 'FETCH_ORI_NEXT',
      *    'FETCH_ORI_PRIOR', 'FETCH_ORI_FIRST', 'FETCH_ORI_LAST',
      *    'FETCH_ORI_ABS', 'FETCH_ORI_REL', 'CURSOR_FWDONLY', 'CURSOR_SCROLL',
      *    'ERR_CANT_MAP', 'ERR_SYNTAX', 'ERR_CONSTRAINT', 'ERR_NOT_FOUND',
      *    'ERR_ALREADY_EXISTS', 'ERR_NOT_IMPLEMENTED', 'ERR_MISMATCH',
      *    'ERR_TRUNCATED', 'ERR_DISCONNECTED', 'ERR_NO_PERM',
      * );
      *
      * $const = array();
      * foreach ($list as $name) {
      *    $const[$name] = constant("PDO::$name");
      * }
      * var_export($const);
      */
     const ATTR_AUTOCOMMIT = 0;
     const ATTR_CASE = 8;
     const ATTR_CLIENT_VERSION = 5;
     const ATTR_CONNECTION_STATUS = 7;
     const ATTR_CURSOR = 10;
     const ATTR_CURSOR_NAME = 9;
     const ATTR_DRIVER_NAME = 16;
     const ATTR_ERRMODE = 3;
     const ATTR_FETCH_CATALOG_NAMES = 15;
     const ATTR_FETCH_TABLE_NAMES = 14;
     const ATTR_MAX_COLUMN_LEN = 18;
     const ATTR_ORACLE_NULLS = 11;
     const ATTR_PERSISTENT = 12;
     const ATTR_PREFETCH = 1;
     const ATTR_SERVER_INFO = 6;
     const ATTR_SERVER_VERSION = 4;
     const ATTR_STATEMENT_CLASS = 13;
     const ATTR_STRINGIFY_FETCHES = 17;
     const ATTR_TIMEOUT = 2;
     const CASE_LOWER = 2;
     const CASE_NATURAL = 0;
     const CASE_UPPER = 1;
     const CURSOR_FWDONLY = 0;
     const CURSOR_SCROLL = 1;
     const ERR_ALREADY_EXISTS = NULL;
     const ERR_CANT_MAP = NULL;
     const ERR_CONSTRAINT = NULL;
     const ERR_DISCONNECTED = NULL;
     const ERR_MISMATCH = NULL;
     const ERR_NO_PERM = NULL;
     const ERR_NONE = '00000';
     const ERR_NOT_FOUND = NULL;
     const ERR_NOT_IMPLEMENTED = NULL;
     const ERR_SYNTAX = NULL;
     const ERR_TRUNCATED = NULL;
     const ERRMODE_EXCEPTION = 2;
     const ERRMODE_SILENT = 0;
     const ERRMODE_WARNING = 1;
     const FETCH_ASSOC = 2;
     const FETCH_BOTH = 4;
     const FETCH_BOUND = 6;
     const FETCH_CLASS = 8;
     const FETCH_CLASSTYPE = 262144;
     const FETCH_COLUMN = 7;
     const FETCH_FUNC = 10;
     const FETCH_GROUP = 65536;
     const FETCH_INTO = 9;
     const FETCH_LAZY = 1;
     const FETCH_NAMED = 11;
     const FETCH_NUM = 3;
     const FETCH_OBJ = 5;
     const FETCH_ORI_ABS = 4;
     const FETCH_ORI_FIRST = 2;
     const FETCH_ORI_LAST = 3;
     const FETCH_ORI_NEXT = 0;
     const FETCH_ORI_PRIOR = 1;
     const FETCH_ORI_REL = 5;
     const FETCH_SERIALIZE = 524288;
     const FETCH_UNIQUE = 196608;
     const NULL_EMPTY_STRING = 1;
     const NULL_NATURAL = 0;
     const NULL_TO_STRING = NULL;
     const PARAM_BOOL = 5;
     const PARAM_INPUT_OUTPUT = -2147483648;
     const PARAM_INT = 1;
     const PARAM_LOB = 3;
     const PARAM_NULL = 0;
     const PARAM_STMT = 4;
     const PARAM_STR = 2;
 
     /**
      * Factory for Zend_Db_Adapter_Abstract classes.
      *
      * First argument may be a string containing the base of the adapter class
      * name, e.g. 'Mysqli' corresponds to class Zend_Db_Adapter_Mysqli.  This
      * name is currently case-insensitive, but is not ideal to rely on this behavior.
      * If your class is named 'My_Company_Pdo_Mysql', where 'My_Company' is the namespace
      * and 'Pdo_Mysql' is the adapter name, it is best to use the name exactly as it
      * is defined in the class.  This will ensure proper use of the factory API.
      *
      * First argument may alternatively be an object of type Zend_Config.
      * The adapter class base name is read from the 'adapter' property.
      * The adapter config parameters are read from the 'params' property.
      *
      * Second argument is optional and may be an associative array of key-value
      * pairs.  This is used as the argument to the adapter constructor.
      *
      * If the first argument is of type Zend_Config, it is assumed to contain
      * all parameters, and the second argument is ignored.
      *
      * @param  mixed $adapter String name of base adapter class, or Zend_Config object.
      * @param  mixed $config  OPTIONAL; an array or Zend_Config object with adapter parameters.
      * @return Zend_Db_Adapter_Abstract
      * @throws Zend_Db_Exception
      */
     public static function factory($adapter, $config = array())
     {
         if ($config instanceof Zend_Config) {
             $config = $config->toArray();
         }
 
         /*
          * Convert Zend_Config argument to plain string
          * adapter name and separate config object.
          */
         if ($adapter instanceof Zend_Config) {
             if (isset($adapter->params)) {
                 $config = $adapter->params->toArray();
             }
             if (isset($adapter->adapter)) {
                 $adapter = (string) $adapter->adapter;
             } else {
                 $adapter = null;
             }
         }
 
         /*
          * Verify that adapter parameters are in an array.
          */
         if (!is_array($config)) {
             /**
              * @see Zend_Db_Exception
              */
             // require_once 'Zend/Db/Exception.php';
             throw new Zend_Db_Exception('Adapter parameters must be in an array or a Zend_Config object');
         }
 
         /*
          * Verify that an adapter name has been specified.
          */
         if (!is_string($adapter) || empty($adapter)) {
             /**
              * @see Zend_Db_Exception
              */
             // require_once 'Zend/Db/Exception.php';
             throw new Zend_Db_Exception('Adapter name must be specified in a string');
         }
 
         /*
          * Form full adapter class name
          */
         $adapterNamespace = 'Zend_Db_Adapter';
         if (isset($config['adapterNamespace'])) {
             if ($config['adapterNamespace'] != '') {
                 $adapterNamespace = $config['adapterNamespace'];
             }
             unset($config['adapterNamespace']);
         }
 
         // Adapter no longer normalized- see http://framework.zend.com/issues/browse/ZF-5606
         $adapterName = $adapterNamespace . '_';
         $adapterName .= str_replace(' ', '_', ucwords(str_replace('_', ' ', strtolower($adapter))));
 
         /*
          * Load the adapter class.  This throws an exception
          * if the specified class cannot be loaded.
          */
         if (!class_exists($adapterName)) {
             // require_once 'Zend/Loader.php';
             Zend_Loader::loadClass($adapterName);
         }
 
         /*
          * Create an instance of the adapter class.
          * Pass the config to the adapter class constructor.
          */
         $dbAdapter = new $adapterName($config);
 
         /*
          * Verify that the object created is a descendent of the abstract adapter type.
          */
         if (! $dbAdapter instanceof Zend_Db_Adapter_Abstract) {
             /**
              * @see Zend_Db_Exception
              */
             // require_once 'Zend/Db/Exception.php';
             throw new Zend_Db_Exception("Adapter class '$adapterName' does not extend Zend_Db_Adapter_Abstract");
         }
 
         return $dbAdapter;
     }
 
 }