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<?php
/**
* TParameterMap class file.
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2010 PradoSoft
* @license http://www.pradosoft.com/license/
* @version $Id$
* @package System.Data.SqlMap.Configuration
*/
/**
* TParameterMap corresponds to the <parameterMap> element.
*
* TParameterMap holds one or more parameter child elements that map object
* properties to placeholders in a SQL statement.
*
* A TParameterMap defines an ordered list of values that match up with the
* placeholders of a parameterized query statement. While the attributes
* specified by the map still need to be in the correct order, each parameter
* is named. You can populate the underlying class in any order, and the
* TParameterMap ensures each value is passed in the correct order.
*
* Parameter Maps can be provided as an external element and inline.
* The <parameterMap> element accepts two attributes: id (required) and extends (optional).
*
* @author Wei Zhuo <weizho[at]gmail[dot]com>
* @version $Id$
* @package System.Data.SqlMap.Configuration
* @since 3.1
*/
class TParameterMap extends TComponent
{
private $_extend;
private $_properties;
private $_propertyMap;
private $_extendMap;
private $_ID;
/**
* Initialize the properties and property map collections.
*/
public function __construct()
{
$this->_properties = new TList;
$this->_propertyMap = new TMap;
}
/**
* @return string a unique identifier for the <parameterMap>.
*/
public function getID()
{
return $this->_ID;
}
/**
* @param string a unique identifier for the <parameterMap>.
*/
public function setID($value)
{
$this->_ID=$value;
}
/**
* @return TParameterProperty[] list of properties for the parameter map.
*/
public function getProperties()
{
return $this->_properties;
}
/**
* @return string name of another <parameterMap> upon which to base this TParameterMap.
*/
public function getExtends()
{
return $this->_extend;
}
/**
* @param string name of another <parameterMap> upon which to base this TParameterMap.
*/
public function setExtends($value)
{
$this->_extend = $value;
}
/**
* @param string name of a parameter property.
* @return TParameterProperty parameter property.
* @throws TSqlMapException if index is not string nor integer.
*/
public function getProperty($index)
{
if(is_string($index))
return $this->_propertyMap->itemAt($index);
else if(is_int($index))
return $this->_properties->itemAt($index);
else
throw new TSqlMapException('sqlmap_index_must_be_string_or_int', $index);
}
/**
* @param TParameterProperty new parameter property
*/
public function addProperty(TParameterProperty $property)
{
$this->_propertyMap->add($property->getProperty(), $property);
$this->_properties->add($property);
}
/**
* @param int parameter property index
* @param TParameterProperty new parameter property.
*/
public function insertProperty($index, TParameterProperty $property)
{
$this->_propertyMap->add($property->getProperty(), $property);
$this->_properties->insertAt($index, $property);
}
/**
* @return array list of property names.
*/
public function getPropertyNames()
{
return $this->_propertyMap->getKeys();
}
/**
* Get the value of a property from the the parameter object.
* @param TSqlMapTypeHandlerRegistry type handler registry.
* @param TParameterProperty parameter proproperty.
* @param mixed parameter object to get the value from.
* @return unknown
*/
public function getPropertyValue($registry, $property, $parameterValue)
{
$value = $this->getObjectValue($parameterValue,$property);
if(($handler=$this->createTypeHandler($property, $registry))!==null)
$value = $handler->getParameter($value);
$value = $this->nullifyDefaultValue($property,$value);
if(($type = $property->getType())!==null)
$value = $registry->convertToType($type, $value);
return $value;
}
/**
* Create type handler from {@link Type setType()} or {@link TypeHandler setTypeHandler}.
* @param TParameterProperty parameter property
* @param TSqlMapTypeHandlerRegistry type handler registry
* @return TSqlMapTypeHandler type handler.
*/
protected function createTypeHandler($property, $registry)
{
$type=$property->getTypeHandler() ? $property->getTypeHandler() : $property->getType();
$handler=$registry->getTypeHandler($type);
if($handler===null && $property->getTypeHandler())
$handler = Prado::createComponent($type);
return $handler;
}
/**
* @param mixed object to obtain the property from.
* @param TParameterProperty parameter property.
* @return mixed property value.
* @throws TSqlMapException if property access is invalid.
*/
protected function getObjectValue($object,$property)
{
try
{
return TPropertyAccess::get($object, $property->getProperty());
}
catch (TInvalidPropertyException $e)
{
throw new TSqlMapException(
'sqlmap_unable_to_get_property_for_parameter',
$this->getID(),
$property->getProperty(),
(is_object($object) ? get_class($object) : gettype($object))
);
}
}
/**
* When the actual value matches the {@link NullValue TParameterProperty::setNullValue()},
* set the current value to null.
* @param TParameterProperty parameter property.
* @param mixed current property value
* @return mixed null if NullValue matches currrent value.
*/
protected function nullifyDefaultValue($property,$value)
{
if(($nullValue = $property->getNullValue())!==null)
{
if($nullValue === $value)
$value = null;
}
return $value;
}
}
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