Applied some misc optimizations to class serialization

Avoid saving in the page state the values of class variables if they’re
still the default.
Reduces page state size, based on the work initiated in
8dc9d4f7d49bcbeaf4998baf74a4f4459967c1f0

1 files changed, 15 insertions, 0 deletions

diff --git a/framework/Collections/TMap.php b/framework/Collections/TMap.php
index d610dce6..a356fe77 100644
--- a/framework/Collections/TMap.php
+++ b/framework/Collections/TMap.php
@@ -42,6 +42,21 @@ class TMap extends TComponent implements IteratorAggregate,ArrayAccess,Countable
 	private $_r=false;
 
 	/**
+	 * Returns an array with the names of all variables of this object that should NOT be serialized
+	 * because their value is the default one or useless to be cached for the next page loads.
+	 * Reimplement in derived classes to add new variables, but remember to  also to call the parent
+	 * implementation first.
+	 */
+	protected function __getZappableSleepProps(&$exprops)
+	{
+		parent::__getZappableSleepProps($exprops);
+		if ($this->_d===array())
+			$exprops[] = "\0TMap\0_d";
+		if ($this->_r===false)
+			$exprops[] = "\0TMap\0_r";
+	}
+
+	/**
 	 * Constructor.
 	 * Initializes the list with an array or an iterable object.
 	 * @param array|Iterator the intial data. Default is null, meaning no initialization.