Modified TRepeater, TDataList and TTemplateColumn to make use of the new template parsing logic.

4 files changed, 187 insertions, 238 deletions

diff --git a/framework/Exceptions/messages.txt b/framework/Exceptions/messages.txt
index 602efcdd..69015d48 100644
--- a/framework/Exceptions/messages.txt
+++ b/framework/Exceptions/messages.txt
@@ -185,4 +185,8 @@ basevalidator_associatedcontrolid_unsupported = TBaseValidator.AssociatedControl
 basevalidator_controltovalidate_invalid = TBaseValidator.ControlToValidate is empty or contains an invalid control ID path.

 basevalidator_validatable_required		= TBaseValidator.ControlToValidate must point to a control implementing IValidatable interface.

 

-comparevalidator_controltocompare_invalid = TCompareValidator.ControlToCompare contains an invalid control ID path.
\ No newline at end of file
+comparevalidator_controltocompare_invalid = TCompareValidator.ControlToCompare contains an invalid control ID path.

+

+repeater_template_required				= TRepeater.%s requires a template instance implementing ITemplate interface.

+datalist_template_required				= TDataList.%s requires a template instance implementing ITemplate interface.

+templatecolumn_template_required		= TTemplateColumn.%s requires a template instance implementing ITemplate interface.
\ No newline at end of file
diff --git a/framework/Web/UI/WebControls/TDataList.php b/framework/Web/UI/WebControls/TDataList.php
index 38045f77..c0d74974 100644
--- a/framework/Web/UI/WebControls/TDataList.php
+++ b/framework/Web/UI/WebControls/TDataList.php
@@ -94,27 +94,19 @@ Prado::using('System.Web.UI.WebControls.TRepeatInfo');
 class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUser

 {

 	/**

-	 * Number of seconds that a cached template will expire after

-	 */

-	const CACHE_EXPIRY=18000;

-	/**

-	 * @var array in-memory cache of parsed templates

-	 */

-	private static $_templates=array();

-	/**

 	 * @var TDataListItemCollection item list

 	 */

 	private $_items=null;

 	/**

-	 * @var string Various item templates

+	 * @var Itemplate various item templates

 	 */

-	private $_itemTemplate='';

-	private $_alternatingItemTemplate='';

-	private $_selectedItemTemplate='';

-	private $_editItemTemplate='';

-	private $_headerTemplate='';

-	private $_footerTemplate='';

-	private $_separatorTemplate='';

+	private $_itemTemplate=null;

+	private $_alternatingItemTemplate=null;

+	private $_selectedItemTemplate=null;

+	private $_editItemTemplate=null;

+	private $_headerTemplate=null;

+	private $_footerTemplate=null;

+	private $_separatorTemplate=null;

 	/**

 	 * @var TDatListItem header item

 	 */

@@ -143,7 +135,7 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 	}

 

 	/**

-	 * @return string the template for item

+	 * @return ITemplate the template for item

 	 */

 	public function getItemTemplate()

 	{

@@ -151,11 +143,15 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 	}

 

 	/**

-	 * @param string the template for item

+	 * @param ITemplate the template for item

+	 * @throws TInvalidDataTypeException if the input is not an {@link ITemplate} or not null.

 	 */

 	public function setItemTemplate($value)

 	{

-		$this->_itemTemplate=$value;

+		if($value instanceof ITemplate || $value===null)

+			$this->_itemTemplate=$value;

+		else

+			throw new TInvalidDataTypeException('datalist_template_required','ItemTemplate');

 	}

 

 	/**

@@ -172,7 +168,7 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 	}

 

 	/**

-	 * @return string the template for each alternating item

+	 * @return ITemplate the template for each alternating item

 	 */

 	public function getAlternatingItemTemplate()

 	{

@@ -180,11 +176,15 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 	}

 

 	/**

-	 * @param string the template for each alternating item

+	 * @param ITemplate the template for each alternating item

+	 * @throws TInvalidDataTypeException if the input is not an {@link ITemplate} or not null.

 	 */

 	public function setAlternatingItemTemplate($value)

 	{

-		$this->_alternatingItemTemplate=$value;

+		if($value instanceof ITemplate || $value===null)

+			$this->_alternatingItemTemplate=$value;

+		else

+			throw new TInvalidDataTypeException('datalist_template_required','AlternatingItemType');

 	}

 

 	/**

@@ -201,7 +201,7 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 	}

 

 	/**

-	 * @return TTableItemStyle the selected item template string

+	 * @return ITemplate the selected item template

 	 */

 	public function getSelectedItemTemplate()

 	{

@@ -209,11 +209,15 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 	}

 

 	/**

-	 * @param string the selected item template

+	 * @param ITemplate the selected item template

+	 * @throws TInvalidDataTypeException if the input is not an {@link ITemplate} or not null.

 	 */

 	public function setSelectedItemTemplate($value)

 	{

-		$this->_selectedItemTemplate=$value;

+		if($value instanceof ITemplate || $value===null)

+			$this->_selectedItemTemplate=$value;

+		else

+			throw new TInvalidDataTypeException('datalist_template_required','SelectedItemTemplate');

 	}

 

 	/**

@@ -230,7 +234,7 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 	}

 

 	/**

-	 * @return string the edit item template string

+	 * @return ITemplate the edit item template

 	 */

 	public function getEditItemTemplate()

 	{

@@ -238,11 +242,15 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 	}

 

 	/**

-	 * @param string the edit item template

+	 * @param ITemplate the edit item template

+	 * @throws TInvalidDataTypeException if the input is not an {@link ITemplate} or not null.

 	 */

 	public function setEditItemTemplate($value)

 	{

-		$this->_editItemTemplate=$value;

+		if($value instanceof ITemplate || $value===null)

+			$this->_editItemTemplate=$value;

+		else

+			throw new TInvalidDataTypeException('datalist_template_required','EditItemTemplate');

 	}

 

 	/**

@@ -259,7 +267,7 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 	}

 

 	/**

-	 * @return string the header template string

+	 * @return ITemplate the header template

 	 */

 	public function getHeaderTemplate()

 	{

@@ -267,11 +275,15 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 	}

 

 	/**

-	 * @param string the header template

+	 * @param ITemplate the header template

+	 * @throws TInvalidDataTypeException if the input is not an {@link ITemplate} or not null.

 	 */

 	public function setHeaderTemplate($value)

 	{

-		$this->_headerTemplate=$value;

+		if($value instanceof ITemplate || $value===null)

+			$this->_headerTemplate=$value;

+		else

+			throw new TInvalidDataTypeException('datalist_template_required','HeaderTemplate');

 	}

 

 	/**

@@ -296,7 +308,7 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 	}

 

 	/**

-	 * @return string the footer template string

+	 * @return ITemplate the footer template

 	 */

 	public function getFooterTemplate()

 	{

@@ -304,11 +316,15 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 	}

 

 	/**

-	 * @param string the footer template

+	 * @param ITemplate the footer template

+	 * @throws TInvalidDataTypeException if the input is not an {@link ITemplate} or not null.

 	 */

 	public function setFooterTemplate($value)

 	{

-		$this->_footerTemplate=$value;

+		if($value instanceof ITemplate || $value===null)

+			$this->_footerTemplate=$value;

+		else

+			throw new TInvalidDataTypeException('datalist_template_required','FooterTemplate');

 	}

 

 	/**

@@ -333,7 +349,7 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 	}

 

 	/**

-	 * @return TTableItemStyle the separator template string

+	 * @return ITemplate the separator template

 	 */

 	public function getSeparatorTemplate()

 	{

@@ -341,11 +357,15 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 	}

 

 	/**

-	 * @param string the separator template

+	 * @param ITemplate the separator template

+	 * @throws TInvalidDataTypeException if the input is not an {@link ITemplate} or not null.

 	 */

 	public function setSeparatorTemplate($value)

 	{

-		$this->_separatorTemplate=$value;

+		if($value instanceof ITemplate || $value===null)

+			$this->_separatorTemplate=$value;

+		else

+			throw new TInvalidDataTypeException('datalist_template_required','SeparatorTemplate');

 	}

 

 	/**

@@ -742,7 +762,7 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 	 */

 	public function getHasHeader()

 	{

-		return ($this->getShowHeader() && $this->_headerTemplate!=='');

+		return ($this->getShowHeader() && $this->_headerTemplate!==null);

 	}

 

 	/**

@@ -752,7 +772,7 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 	 */

 	public function getHasFooter()

 	{

-		return ($this->getShowFooter() && $this->_footerTemplate!=='');

+		return ($this->getShowFooter() && $this->_footerTemplate!==null);

 	}

 

 	/**

@@ -762,7 +782,7 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 	 */

 	public function getHasSeparators()

 	{

-		return $this->_separatorTemplate!=='';

+		return $this->_separatorTemplate!==null;

 	}

 

 	/**

@@ -815,9 +835,9 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 				return $this->getItems()->itemAt($index);

 			case 'Separator':

 				$i=$index+$index+1;

-				if($this->_headerTemplate!=='')

+				if($this->_headerTemplate!==null)

 					$i++;

-				return $this->getControls->itemAt($i);

+				return $this->getControls()->itemAt($i);

 		}

 		return null;

 	}

@@ -949,74 +969,45 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 	 */

 	protected function initializeItem($item)

 	{

-		$tplContent='';

+		$template=null;

 		switch($item->getItemType())

 		{

 			case 'Header':

-				$tplContent=$this->_headerTemplate;

+				$template=$this->_headerTemplate;

 				break;

 			case 'Footer':

-				$tplContent=$this->_footerTemplate;

+				$template=$this->_footerTemplate;

 				break;

 			case 'Item':

-				$tplContent=$this->_itemTemplate;

+				$template=$this->_itemTemplate;

 				break;

 			case 'AlternatingItem':

-				if(($tplContent=$this->_alternatingItemTemplate)==='')

-					$tplContent=$this->_itemTemplate;

+				if(($template=$this->_alternatingItemTemplate)===null)

+					$template=$this->_itemTemplate;

 				break;

 			case 'Separator':

-				$tplContent=$this->_separatorTemplate;

+				$template=$this->_separatorTemplate;

 				break;

 			case 'SelectedItem':

-				if(($tplContent=$this->_selectedItemTemplate)==='')

+				if(($template=$this->_selectedItemTemplate)===null)

 				{

-					if(!($item->getItemIndex()%2) || ($tplContent=$this->_alternatingItemTemplate)==='')

-						$tplContent=$this->_itemTemplate;

+					if(!($item->getItemIndex()%2) || ($template=$this->_alternatingItemTemplate)===null)

+						$template=$this->_itemTemplate;

 				}

 				break;

 			case 'EditItem':

-				if(($tplContent=$this->_editItemTemplate)==='')

+				if(($template=$this->_editItemTemplate)===null)

 				{

-					if($item->getItemIndex()!==$this->getSelectedItemIndex() || ($tplContent=$this->_selectedItemTemplate)==='')

-						if(!($item->getItemIndex()%2) || ($tplContent=$this->_alternatingItemTemplate)==='')

-							$tplContent=$this->_itemTemplate;

+					if($item->getItemIndex()!==$this->getSelectedItemIndex() || ($template=$this->_selectedItemTemplate)===null)

+						if(!($item->getItemIndex()%2) || ($template=$this->_alternatingItemTemplate)===null)

+							$template=$this->_itemTemplate;

 				}

 				break;

 			default:

 				break;

 		}

-		if($tplContent!=='')

-			$this->createTemplate($tplContent)->instantiateIn($item);

-	}

-

-	/**

-	 * Parses item template.

-	 * This method uses caching technique to accelerate template parsing.

-	 * @param string template string

-	 * @return ITemplate parsed template object

-	 */

-	protected function createTemplate($str)

-	{

-		$key=md5($str);

-		if(isset(self::$_templates[$key]))

-			return self::$_templates[$key];

-		else

-		{

-			$contextPath=$this->getTemplateControl()->getTemplate()->getContextPath();

-			if(($cache=$this->getApplication()->getCache())!==null)

-			{

-				if(($template=$cache->get($key))===null)

-				{

-					$template=new TTemplate($str,$contextPath);

-					$cache->set($key,$template,self::CACHE_EXPIRY);

-				}

-			}

-			else

-				$template=new TTemplate($str,$contextPath);

-			self::$_templates[$key]=$template;

-			return $template;

-		}

+		if($template!==null)

+			$template->instantiateIn($item);

 	}

 

 	/**

@@ -1066,9 +1057,9 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 			$items=$this->getItems();

 			$selectedIndex=$this->getSelectedItemIndex();

 			$editIndex=$this->getEditItemIndex();

-			if($this->_headerTemplate!=='')

+			if($this->_headerTemplate!==null)

 				$this->_header=$this->createItemInternal(-1,'Header',false,null);

-			$hasSeparator=$this->_separatorTemplate!=='';

+			$hasSeparator=$this->_separatorTemplate!==null;

 			for($i=0;$i<$itemCount;++$i)

 			{

 				if($hasSeparator && $i>0)

@@ -1081,7 +1072,7 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 					$itemType=$i%2?'AlternatingItem':'Item';

 				$items->add($this->createItemInternal($i,$itemType,false,null));

 			}

-			if($this->_footerTemplate!=='')

+			if($this->_footerTemplate!==null)

 				$this->_footer=$this->createItemInternal(-1,'Footer',false,null);

 		}

 		$this->clearChildState();

@@ -1101,14 +1092,14 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 		$keyField=$this->getDataKeyField();

 		$itemIndex=0;

 		$items=$this->getItems();

-		$hasSeparator=$this->_separatorTemplate!=='';

+		$hasSeparator=$this->_separatorTemplate!==null;

 		$selectedIndex=$this->getSelectedItemIndex();

 		$editIndex=$this->getEditItemIndex();

 		foreach($data as $dataItem)

 		{

 			if($keyField!=='')

 				$keys->add($this->getDataFieldValue($dataItem,$keyField));

-			if($itemIndex===0 && $this->_headerTemplate!=='')

+			if($itemIndex===0 && $this->_headerTemplate!==null)

 				$this->_header=$this->createItemInternal(-1,'Header',true,null);

 			if($hasSeparator && $itemIndex>0)

 				$this->createItemInternal($itemIndex-1,'Separator',true,null);

@@ -1121,7 +1112,7 @@ class TDataList extends TBaseDataList implements INamingContainer, IRepeatInfoUs
 			$items->add($this->createItemInternal($itemIndex,$itemType,true,$dataItem));

 			$itemIndex++;

 		}

-		if($itemIndex>0 && $this->_footerTemplate!=='')

+		if($itemIndex>0 && $this->_footerTemplate!==null)

 			$this->_footer=$this->createItemInternal(-1,'Footer',true,null);

 		$this->setViewState('ItemCount',$itemIndex,0);

 	}

diff --git a/framework/Web/UI/WebControls/TRepeater.php b/framework/Web/UI/WebControls/TRepeater.php
index 92d87b64..6aa6b461 100644
--- a/framework/Web/UI/WebControls/TRepeater.php
+++ b/framework/Web/UI/WebControls/TRepeater.php
@@ -57,33 +57,25 @@ Prado::using('System.Web.UI.WebControls.TDataBoundControl');
 class TRepeater extends TDataBoundControl implements INamingContainer

 {

 	/**

-	 * Number of seconds that a cached template will expire after

+	 * @var ITemplate template for repeater items

 	 */

-	const CACHE_EXPIRY=18000;

+	private $_itemTemplate=null;

 	/**

-	 * @var array in-memory cache of parsed templates

+	 * @var ITemplate template for each alternating item

 	 */

-	private static $_templates=array();

+	private $_alternatingItemTemplate=null;

 	/**

-	 * @var string template for each item

+	 * @var ITemplate template for header

 	 */

-	private $_itemTemplate='';

+	private $_headerTemplate=null;

 	/**

-	 * @var string template for each alternating item

+	 * @var ITemplate template for footer

 	 */

-	private $_alternatingItemTemplate='';

+	private $_footerTemplate=null;

 	/**

-	 * @var string template for header

+	 * @var ITemplate template for separator

 	 */

-	private $_headerTemplate='';

-	/**

-	 * @var string template for footer

-	 */

-	private $_footerTemplate='';

-	/**

-	 * @var string template for separator

-	 */

-	private $_separatorTemplate='';

+	private $_separatorTemplate=null;

 	/**

 	 * @var TRepeaterItemCollection list of repeater items

 	 */

@@ -107,7 +99,7 @@ class TRepeater extends TDataBoundControl implements INamingContainer
 	}

 

 	/**

-	 * @return string the template string for the item

+	 * @return ITemplate the template for repeater items

 	 */

 	public function getItemTemplate()

 	{

@@ -115,16 +107,19 @@ class TRepeater extends TDataBoundControl implements INamingContainer
 	}

 

 	/**

-	 * Sets the template string for the item

-	 * @param string the item template

+	 * @param ITemplate the template for repeater items

+	 * @throws TInvalidDataTypeException if the input is not an {@link ITemplate} or not null.

 	 */

 	public function setItemTemplate($value)

 	{

-		$this->_itemTemplate=$value;

+		if($value instanceof ITemplate || $value===null)

+			$this->_itemTemplate=$value;

+		else

+			throw new TInvalidDataTypeException('repeater_template_required','ItemTemplate');

 	}

 

 	/**

-	 * @return string the alternative template string for the item

+	 * @return ITemplate the alternative template string for the item

 	 */

 	public function getAlternatingItemTemplate()

 	{

@@ -132,16 +127,19 @@ class TRepeater extends TDataBoundControl implements INamingContainer
 	}

 

 	/**

-	 * Sets the alternative template string for the item

-	 * @param string the alternative item template

+	 * @param ITemplate the alternative item template

+	 * @throws TInvalidDataTypeException if the input is not an {@link ITemplate} or not null.

 	 */

 	public function setAlternatingItemTemplate($value)

 	{

-		$this->_alternatingItemTemplate=$value;

+		if($value instanceof ITemplate || $value===null)

+			$this->_alternatingItemTemplate=$value;

+		else

+			throw new TInvalidDataTypeException('repeater_template_required','AlternatingItemTemplate');

 	}

 

 	/**

-	 * @return string the header template string

+	 * @return ITemplate the header template

 	 */

 	public function getHeaderTemplate()

 	{

@@ -149,16 +147,19 @@ class TRepeater extends TDataBoundControl implements INamingContainer
 	}

 

 	/**

-	 * Sets the header template.

-	 * @param string the header template

+	 * @param ITemplate the header template

+	 * @throws TInvalidDataTypeException if the input is not an {@link ITemplate} or not null.

 	 */

 	public function setHeaderTemplate($value)

 	{

-		$this->_headerTemplate=$value;

+		if($value instanceof ITemplate || $value===null)

+			$this->_headerTemplate=$value;

+		else

+			throw new TInvalidDataTypeException('repeater_template_required','HeaderTemplate');

 	}

 

 	/**

-	 * @return string the footer template string

+	 * @return ITemplate the footer template

 	 */

 	public function getFooterTemplate()

 	{

@@ -166,16 +167,19 @@ class TRepeater extends TDataBoundControl implements INamingContainer
 	}

 

 	/**

-	 * Sets the footer template.

-	 * @param string the footer template

+	 * @param ITemplate the footer template

+	 * @throws TInvalidDataTypeException if the input is not an {@link ITemplate} or not null.

 	 */

 	public function setFooterTemplate($value)

 	{

-		$this->_footerTemplate=$value;

+		if($value instanceof ITemplate || $value===null)

+			$this->_footerTemplate=$value;

+		else

+			throw new TInvalidDataTypeException('repeater_template_required','FooterTemplate');

 	}

 

 	/**

-	 * @return string the separator template string

+	 * @return ITemplate the separator template

 	 */

 	public function getSeparatorTemplate()

 	{

@@ -183,12 +187,15 @@ class TRepeater extends TDataBoundControl implements INamingContainer
 	}

 

 	/**

-	 * Sets the separator template string

-	 * @param string the separator template

+	 * @param ITemplate the separator template

+	 * @throws TInvalidDataTypeException if the input is not an {@link ITemplate} or not null.

 	 */

 	public function setSeparatorTemplate($value)

 	{

-		$this->_separatorTemplate=$value;

+		if($value instanceof ITemplate || $value===null)

+			$this->_separatorTemplate=$value;

+		else

+			throw new TInvalidDataTypeException('repeater_template_required','SeparatorTemplate');

 	}

 

 	/**

@@ -267,50 +274,21 @@ class TRepeater extends TDataBoundControl implements INamingContainer
 	 */

 	protected function initializeItem($item)

 	{

-		$tplContent='';

+		$template=null;

 		switch($item->getItemType())

 		{

-			case 'Header': $tplContent=$this->_headerTemplate; break;

-			case 'Footer': $tplContent=$this->_footerTemplate; break;

-			case 'Item': $tplContent=$this->_itemTemplate; break;

-			case 'Separator': $tplContent=$this->_separatorTemplate; break;

-			case 'AlternatingItem': $tplContent=$this->_alternatingItemTemplate==='' ? $this->_itemTemplate : $this->_alternatingItemTemplate; break;

+			case 'Header': $template=$this->_headerTemplate; break;

+			case 'Footer': $template=$this->_footerTemplate; break;

+			case 'Item': $template=$this->_itemTemplate; break;

+			case 'Separator': $template=$this->_separatorTemplate; break;

+			case 'AlternatingItem': $template=$this->_alternatingItemTemplate===null ? $this->_itemTemplate : $this->_alternatingItemTemplate; break;

 			case 'SelectedItem':

 			case 'EditItem':

 			default:

 				break;

 		}

-		if($tplContent!=='')

-			$this->createTemplate($tplContent)->instantiateIn($item);

-	}

-

-	/**

-	 * Parses item template.

-	 * This method uses caching technique to accelerate template parsing.

-	 * @param string template string

-	 * @return ITemplate parsed template object

-	 */

-	protected function createTemplate($str)

-	{

-		$key=md5($str);

-		if(isset(self::$_templates[$key]))

-			return self::$_templates[$key];

-		else

-		{

-			$contextPath=$this->getTemplateControl()->getTemplate()->getContextPath();

-			if(($cache=$this->getApplication()->getCache())!==null)

-			{

-				if(($template=$cache->get($key))===null)

-				{

-					$template=new TTemplate($str,$contextPath);

-					$cache->set($key,$template,self::CACHE_EXPIRY);

-				}

-			}

-			else

-				$template=new TTemplate($str,$contextPath);

-			self::$_templates[$key]=$template;

-			return $template;

-		}

+		if($template!==null)

+			$template->instantiateIn($item);

 	}

 

 	/**

@@ -369,8 +347,8 @@ class TRepeater extends TDataBoundControl implements INamingContainer
 		if(($itemCount=$this->getViewState('ItemCount',0))>0)

 		{

 			$items=$this->getItems();

-			$hasSeparator=$this->_separatorTemplate!=='';

-			if($this->_headerTemplate!=='')

+			$hasSeparator=$this->_separatorTemplate!==null;

+			if($this->_headerTemplate!==null)

 				$this->_header=$this->createItemInternal(-1,'Header',false,null);

 			for($i=0;$i<$itemCount;++$i)

 			{

@@ -379,7 +357,7 @@ class TRepeater extends TDataBoundControl implements INamingContainer
 				$itemType=$i%2==0?'Item':'AlternatingItem';

 				$items->add($this->createItemInternal($i,$itemType,false,null));

 			}

-			if($this->_footerTemplate!=='')

+			if($this->_footerTemplate!==null)

 				$this->_footer=$this->createItemInternal(-1,'Footer',false,null);

 		}

 		$this->clearChildState();

@@ -396,10 +374,10 @@ class TRepeater extends TDataBoundControl implements INamingContainer
 		$this->reset();

 		$itemIndex=0;

 		$items=$this->getItems();

-		$hasSeparator=$this->_separatorTemplate!=='';

+		$hasSeparator=$this->_separatorTemplate!==null;

 		foreach($data as $dataItem)

 		{

-			if($itemIndex===0 && $this->_headerTemplate!=='')

+			if($itemIndex===0 && $this->_headerTemplate!==null)

 				$this->_header=$this->createItemInternal(-1,'Header',true,null);

 			if($hasSeparator && $itemIndex>0)

 				$this->createItemInternal($itemIndex-1,'Separator',true,null);

@@ -407,7 +385,7 @@ class TRepeater extends TDataBoundControl implements INamingContainer
 			$items->add($this->createItemInternal($itemIndex,$itemType,true,$dataItem));

 			$itemIndex++;

 		}

-		if($itemIndex>0 && $this->_footerTemplate!=='')

+		if($itemIndex>0 && $this->_footerTemplate!==null)

 			$this->_footer=$this->createItemInternal(-1,'Footer',true,null);

 		$this->setViewState('ItemCount',$itemIndex,0);

 	}

diff --git a/framework/Web/UI/WebControls/TTemplateColumn.php b/framework/Web/UI/WebControls/TTemplateColumn.php
index ec4f191d..9c386543 100644
--- a/framework/Web/UI/WebControls/TTemplateColumn.php
+++ b/framework/Web/UI/WebControls/TTemplateColumn.php
@@ -31,21 +31,16 @@ Prado::using('System.Web.UI.WebControls.TDataGridColumn');
 class TTemplateColumn extends TDataGridColumn

 {

 	/**

-	 * Number of seconds that a cached template will expire after

-	 */

-	const CACHE_EXPIRY=18000;

-	/**

 	 * Various item templates

 	 * @var string

 	 */

-	private $_itemTemplate='';

-	private $_editItemTemplate='';

-	private $_headerTemplate='';

-	private $_footerTemplate='';

-	private static $_templates=array();

+	private $_itemTemplate=null;

+	private $_editItemTemplate=null;

+	private $_headerTemplate=null;

+	private $_footerTemplate=null;

 

 	/**

-	 * @return string the edit item template string

+	 * @return ITemplate the edit item template

 	 */

 	public function getEditItemTemplate()

 	{

@@ -53,16 +48,19 @@ class TTemplateColumn extends TDataGridColumn
 	}

 

 	/**

-	 * Sets the edit item template string

-	 * @param string the edit item template

+	 * @param ITemplate the edit item template

+	 * @throws TInvalidDataTypeException if the input is not an {@link ITemplate} or not null.

 	 */

 	public function setEditItemTemplate($value)

 	{

-		$this->_editItemTemplate=$value;

+		if($value instanceof ITemplate || $value===null)

+			$this->_editItemTemplate=$value;

+		else

+			throw new TInvalidDataTypeException('templatecolumn_template_required','EditItemTemplate');

 	}

 

 	/**

-	 * @return string the template string for the item

+	 * @return ITemplate the item template

 	 */

 	public function getItemTemplate()

 	{

@@ -70,16 +68,19 @@ class TTemplateColumn extends TDataGridColumn
 	}

 

 	/**

-	 * Sets the template string for the item

-	 * @param string the item template

+	 * @param ITemplate the item template

+	 * @throws TInvalidDataTypeException if the input is not an {@link ITemplate} or not null.

 	 */

 	public function setItemTemplate($value)

 	{

-		$this->_itemTemplate=$value;

+		if($value instanceof ITemplate || $value===null)

+			$this->_itemTemplate=$value;

+		else

+			throw new TInvalidDataTypeException('templatecolumn_template_required','ItemTemplate');

 	}

 

 	/**

-	 * @return string the header template string

+	 * @return ITemplate the header template

 	 */

 	public function getHeaderTemplate()

 	{

@@ -87,17 +88,19 @@ class TTemplateColumn extends TDataGridColumn
 	}

 

 	/**

-	 * Sets the header template.

-	 * The template will be parsed immediately.

-	 * @param string the header template

+	 * @param ITemplate the header template

+	 * @throws TInvalidDataTypeException if the input is not an {@link ITemplate} or not null.

 	 */

 	public function setHeaderTemplate($value)

 	{

-		$this->_headerTemplate=$value;

+		if($value instanceof ITemplate || $value===null)

+			$this->_headerTemplate=$value;

+		else

+			throw new TInvalidDataTypeException('templatecolumn_template_required','HeaderTemplate');

 	}

 

 	/**

-	 * @return string the footer template string

+	 * @return ITemplate the footer template

 	 */

 	public function getFooterTemplate()

 	{

@@ -105,13 +108,15 @@ class TTemplateColumn extends TDataGridColumn
 	}

 

 	/**

-	 * Sets the footer template.

-	 * The template will be parsed immediately.

-	 * @param string the footer template

+	 * @param ITemplate the footer template

+	 * @throws TInvalidDataTypeException if the input is not an {@link ITemplate} or not null.

 	 */

 	public function setFooterTemplate($value)

 	{

-		$this->_footerTemplate=$value;

+		if($value instanceof ITemplate || $value===null)

+			$this->_footerTemplate=$value;

+		else

+			throw new TInvalidDataTypeException('templatecolumn_template_required','FooterTemplate');

 	}

 

 	/**

@@ -126,58 +131,29 @@ class TTemplateColumn extends TDataGridColumn
 	public function initializeCell($cell,$columnIndex,$itemType)

 	{

 		parent::initializeCell($cell,$columnIndex,$itemType);

-		$tplContent='';

+		$template=null;

 		switch($itemType)

 		{

 			case 'Header':

-				$tplContent=$this->_headerTemplate;

+				$template=$this->_headerTemplate;

 				break;

 			case 'Footer':

-				$tplContent=$this->_footerTemplate;

+				$template=$this->_footerTemplate;

 				break;

 			case 'Item':

 			case 'AlternatingItem':

 			case 'SelectedItem':

-				$tplContent=$this->_itemTemplate;

+				$template=$this->_itemTemplate;

 				break;

 			case 'EditItem':

-				$tplContent=$this->_editItemTemplate===''?$this->_itemTemplate:$this->_editItemTemplate;

+				$template=$this->_editItemTemplate===null?$this->_itemTemplate:$this->_editItemTemplate;

 				break;

 		}

-		if($tplContent!=='')

+		if($template!==null)

 		{

 			$cell->setText('');

 			$cell->getControls()->clear();

-			$this->createTemplate($tplContent)->instantiateIn($cell);

-		}

-	}

-

-	/**

-	 * Parses item template.

-	 * This method uses caching technique to accelerate template parsing.

-	 * @param string template string

-	 * @return ITemplate parsed template object

-	 */

-	protected function createTemplate($str)

-	{

-		$key=md5($str);

-		if(isset(self::$_templates[$key]))

-			return self::$_templates[$key];

-		else

-		{

-			$contextPath=$this->getOwner()->getTemplateControl()->getTemplate()->getContextPath();

-			if(($cache=$this->getApplication()->getCache())!==null)

-			{

-				if(($template=$cache->get($key))===null)

-				{

-					$template=new TTemplate($str,$contextPath);

-					$cache->set($key,$template,self::CACHE_EXPIRY);

-				}

-			}

-			else

-				$template=new TTemplate($str,$contextPath);

-			self::$_templates[$key]=$template;

-			return $template;

+			$template->instantiateIn($cell);

 		}

 	}

 }