File indexing completed on 2024-12-29 05:27:29

 <?php
 /**
  * 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_Cloud
  * @subpackage DocumentService
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 
 /*
  * @see Zend_Cloud_DocumentService_Query
  */
 // require_once 'Zend/Cloud/DocumentService/Query.php';
 
 /**
  * Class implementing Query adapter for working with SimpleDb queries in a
  * structured way
  *
  * @category   Zend
  * @package    Zend_Cloud
  * @subpackage DocumentService
  * @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_Cloud_DocumentService_Adapter_SimpleDb_Query
     extends Zend_Cloud_DocumentService_Query
 {
     /**
      * @var Zend_Cloud_DocumentService_Adapter_SimpleDb
      */
     protected $_adapter;
 
     /**
      * Constructor
      *
      * @param  Zend_Cloud_DocumentService_Adapter_SimpleDb $adapter
      * @param  null|string $collectionName
      * @return void
      */
     public function __construct(Zend_Cloud_DocumentService_Adapter_SimpleDb $adapter, $collectionName = null)
     {
         $this->_adapter = $adapter;
         if (null !== $collectionName) {
             $this->from($collectionName);
         }
     }
 
     /**
      * Get adapter
      *
      * @return Zend_Cloud_DocumentService_Adapter_SimpleDb
      */
     public function getAdapter()
     {
         return $this->_adapter;
     }
 
     /**
      * Assemble the query into a format the adapter can utilize
      *
      * @var    string $collectionName Name of collection from which to select
      * @return string
      */
     public function assemble($collectionName = null)
     {
         $adapter = $this->getAdapter()->getClient();
         $select  = null;
         $from    = null;
         $where   = null;
         $order   = null;
         $limit   = null;
         foreach ($this->getClauses() as $clause) {
             list($name, $args) = $clause;
 
             switch ($name) {
                 case self::QUERY_SELECT:
                     $select = $args[0];
                     break;
                 case self::QUERY_FROM:
                     if (null === $from) {
                         // Only allow setting FROM clause once
                         $from = $adapter->quoteName($args);
                     }
                     break;
                 case self::QUERY_WHERE:
                     $statement = $this->_parseWhere($args[0], $args[1]);
                     if (null === $where) {
                         $where = $statement;
                     } else {
                         $operator = empty($args[2]) ? 'AND' : $args[2];
                         $where .= ' ' . $operator . ' ' . $statement;
                     }
                     break;
                 case self::QUERY_WHEREID:
                     $statement = $this->_parseWhere('ItemName() = ?', array($args));
                     if (null === $where) {
                         $where = $statement;
                     } else {
                         $operator = empty($args[2]) ? 'AND' : $args[2];
                         $where .= ' ' . $operator . ' ' . $statement;
                     }
                     break;
                 case self::QUERY_ORDER:
                     $order = $adapter->quoteName($args[0]);
                     if (isset($args[1])) {
                         $order .= ' ' . $args[1];
                     }
                     break;
                 case self::QUERY_LIMIT:
                     $limit = $args;
                     break;
                 default:
                     // Ignore unknown clauses
                     break;
             }
         }
 
         if (empty($select)) {
             $select = "*";
         }
         if (empty($from)) {
             if (null === $collectionName) {
                 // require_once 'Zend/Cloud/DocumentService/Exception.php';
                 throw new Zend_Cloud_DocumentService_Exception("Query requires a FROM clause");
             }
             $from = $adapter->quoteName($collectionName);
         }
         $query = "select $select from $from";
         if (!empty($where)) {
             $query .= " where $where";
         }
         if (!empty($order)) {
             $query .= " order by $order";
         }
         if (!empty($limit)) {
             $query .= " limit $limit";
         }
         return $query;
     }
 
     /**
      * Parse a where statement into service-specific language
      *
      * @todo   Ensure this fulfills the entire SimpleDB query specification for WHERE
      * @param  string $where
      * @param  array $args
      * @return string
      */
     protected function _parseWhere($where, $args)
     {
         if (!is_array($args)) {
             $args = (array) $args;
         }
         $adapter = $this->getAdapter()->getClient();
         $i = 0;
         while (false !== ($pos = strpos($where, '?'))) {
            $where = substr_replace($where, $adapter->quote($args[$i]), $pos);
            ++$i;
         }
         if (('(' != $where[0]) || (')' != $where[strlen($where) - 1])) {
             $where = '(' . $where . ')';
         }
         return $where;
     }
  }