first commit
This commit is contained in:
renjianbo
@@ -0,0 +1,175 @@
|
||||
<?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) 2005-2010 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) 2005-2010 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;
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user