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<?php
/**
* TDbSqlCriteria class file.
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2007 PradoSoft
* @license http://www.pradosoft.com/license/
* @version $Id: TDbSqlCriteria.php 1835 2007-04-03 01:38:15Z wei $
* @package System.Data.DataGateway
*/
/**
* Search criteria for TDbDataGateway.
*
* Criteria object for data gateway finder methods. Usage:
* <code>
* $criteria = new TDbSqlCriteria;
* $criteria->Parameters[':name'] = 'admin';
* $criteria->Parameters[':pass'] = 'prado';
* $criteria->OrdersBy['level'] = 'desc';
* $criteria->OrdersBy['name'] = 'asc';
* $criteria->Limit = 10;
* $criteria->Offset = 20;
* </code>
*
* @author Wei Zhuo <weizho[at]gmail[dot]com>
* @version $Id: TDbSqlCriteria.php 1835 2007-04-03 01:38:15Z wei $
* @package System.Data.DataGateway
* @since 3.1
*/
class TSqlCriteria extends TComponent
{
private $_condition;
private $_parameters;
private $_ordersBy;
private $_limit;
private $_offset;
/**
* Creates a new criteria with given condition;
* @param string sql string after the WHERE stanza
* @param mixed named or indexed parameters, accepts as multiple arguments.
*/
public function __construct($condition=null, $parameters=array())
{
if(!is_array($parameters) && func_num_args() > 1)
$parameters = array_slice(func_get_args(),1);
$this->_parameters=new TAttributeCollection;
$this->_parameters->setCaseSensitive(true);
$this->_parameters->copyFrom((array)$parameters);
$this->_ordersBy=new TAttributeCollection;
$this->_ordersBy->setCaseSensitive(true);
$this->setCondition($condition);
}
/**
* @return string search conditions.
*/
public function getCondition()
{
return $this->_condition;
}
/**
* Sets the search conditions to be placed after the WHERE clause in the SQL.
* @param string search conditions.
*/
public function setCondition($value)
{
if(!empty($value) && preg_match('/ORDER\s+BY\s+(.*?)$/i',$value,$matches)>0)
{
// condition contains ORDER BY, we need to strip it output
$this->_condition=substr($value,0,strpos($value,$matches[0]));
$this->setOrdersBy($matches[1]);
}
else
$this->_condition=$value;
}
/**
* @return TAttributeCollection list of named parameters and values.
*/
public function getParameters()
{
return $this->_parameters;
}
/**
* @param ArrayAccess named parameters.
*/
public function setParameters($value)
{
if(!(is_array($value) || $value instanceof ArrayAccess))
throw new TException('value must be array or ArrayAccess');
$this->_parameters->copyFrom($value);
}
/**
* @return boolean true if the parameter index are string base, false otherwise.
*/
public function getIsNamedParameters()
{
foreach($this->getParameters() as $k=>$v)
return is_string($k);
}
/**
* @return TAttributeCollection ordering clause.
*/
public function getOrdersBy()
{
return $this->_ordersBy;
}
/**
* @param mixed ordering clause.
*/
public function setOrdersBy($value)
{
if(is_array($value) || $value instanceof Traversable)
$this->_ordersBy->copyFrom($value);
else
{
$value=trim(preg_replace('/\s+/',' ',(string)$value));
$orderBys=array();
foreach(explode(',',$value) as $orderBy)
{
$vs=explode(' ',trim($orderBy));
$orderBys[$vs[0]]=isset($vs[1])?$vs[1]:'asc';
}
$this->_ordersBy->copyFrom($orderBys);
}
}
/**
* @return int maximum number of records to return.
*/
public function getLimit()
{
return $this->_limit;
}
/**
* @param int maximum number of records to return.
*/
public function setLimit($value)
{
$this->_limit=$value;
}
/**
* @return int record offset.
*/
public function getOffset()
{
return $this->_offset;
}
/**
* @param int record offset.
*/
public function setOffset($value)
{
$this->_offset=$value;
}
/**
* @return string string representation of the parameters. Useful for debugging.
*/
public function __toString()
{
$str = '';
if(strlen((string)$this->getCondition()) > 0)
$str .= '"'.(string)$this->getCondition().'"';
$params = array();
foreach($this->getParameters() as $k=>$v)
$params[] = "{$k} => ${v}";
if(count($params) > 0)
$str .= ', "'.implode(', ',$params).'"';
$orders = array();
foreach($this->getOrdersBy() as $k=>$v)
$orders[] = "{$k} => ${v}";
if(count($orders) > 0)
$str .= ', "'.implode(', ',$orders).'"';
if($this->_limit !==null)
$str .= ', '.$this->_limit;
if($this->_offset !== null)
$str .= ', '.$this->_offset;
return $str;
}
}
?>
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