[ExpressionLanguage] optimized serialization of nodes and expressions

src/Symfony/Component/ExpressionLanguage/Node/BinaryNode.php

@@ -15,13 +15,13 @@ use Symfony\Component\ExpressionLanguage\Compiler;
 
 class BinaryNode extends Node
 {
-    private $operators = array(
+    private static $operators = array(
         '~'     => '.',
         'and'   => '&&',
         'or'    => '||',
     );
 
-    private $functions = array(
+    private static $functions = array(
         '**'     => 'pow',
         '..'     => 'range',
         'in'     => 'in_array',
@@ -50,9 +50,9 @@ class BinaryNode extends Node
             return;
         }
 
-        if (isset($this->functions[$operator])) {
+        if (isset(self::$functions[$operator])) {
             $compiler
-                ->raw(sprintf('%s(', $this->functions[$operator]))
+                ->raw(sprintf('%s(', self::$functions[$operator]))
                 ->compile($this->nodes['left'])
                 ->raw(', ')
                 ->compile($this->nodes['right'])
@@ -62,8 +62,8 @@ class BinaryNode extends Node
             return;
         }
 
-        if (isset($this->operators[$operator])) {
+        if (isset(self::$operators[$operator])) {
-            $operator = $this->operators[$operator];
+            $operator = self::$operators[$operator];
         }
 
         $compiler
@@ -83,12 +83,12 @@ class BinaryNode extends Node
         $left = $this->nodes['left']->evaluate($functions, $values);
         $right = $this->nodes['right']->evaluate($functions, $values);
 
-        if (isset($this->functions[$operator])) {
+        if (isset(self::$functions[$operator])) {
             if ('not in' == $operator) {
                 return !call_user_func('in_array', $left, $right);
             }
 
-            return call_user_func($this->functions[$operator], $left, $right);
+            return call_user_func(self::$functions[$operator], $left, $right);
         }
 
         switch ($operator) {

src/Symfony/Component/ExpressionLanguage/Node/UnaryNode.php

@@ -15,7 +15,7 @@ use Symfony\Component\ExpressionLanguage\Compiler;
 
 class UnaryNode extends Node
 {
-    private $operators = array(
+    private static $operators = array(
         '!' => '!',
         'not' => '!',
         '+' => '+',
@@ -32,7 +32,7 @@ class UnaryNode extends Node
     {
         $compiler
             ->raw('(')
-            ->raw($this->operators[$this->attributes['operator']])
+            ->raw(self::$operators[$this->attributes['operator']])
             ->compile($this->nodes['node'])
             ->raw(')')
         ;

src/Symfony/Component/ExpressionLanguage/Tests/ExpressionTest.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Symfony\Component\ExpressionLanguage\Tests;
+
+use Symfony\Component\ExpressionLanguage\Expression;
+
+class ExpressionTest extends \PHPUnit_Framework_TestCase
+{
+    public function testSerialization()
+    {
+        $expression = new Expression('kernel.boot()');
+
+        $serializedExpression = serialize($expression);
+        $unserializedExpression = unserialize($serializedExpression);
+
+        $this->assertEquals($expression, $unserializedExpression);
+    }
+}

src/Symfony/Component/ExpressionLanguage/Tests/Node/ArrayNodeTest.php

@@ -16,6 +16,18 @@ use Symfony\Component\ExpressionLanguage\Node\ConstantNode;
 
 class ArrayNodeTest extends AbstractNodeTest
 {
+    public function testSerialization()
+    {
+        $node = $this->createArrayNode();
+        $node->addElement(new ConstantNode('foo'));
+
+        $serializedNode = serialize($node);
+        $unserializedNode = unserialize($serializedNode);
+
+        $this->assertEquals($node, $unserializedNode);
+        $this->assertNotEquals($this->createArrayNode(), $unserializedNode);
+    }
+
     public function getEvaluateData()
     {
         return array(

src/Symfony/Component/ExpressionLanguage/Tests/Node/NodeTest.php

@@ -27,4 +27,14 @@ Node(
 EOF
         , (string) $node);
     }
+
+    public function testSerialization()
+    {
+        $node = new Node(array('foo' => 'bar'), array('bar' => 'foo'));
+
+        $serializedNode = serialize($node);
+        $unserializedNode = unserialize($serializedNode);
+
+        $this->assertEquals($node, $unserializedNode);
+    }
 }

src/Symfony/Component/ExpressionLanguage/Tests/ParsedExpressionTest.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Symfony\Component\ExpressionLanguage\Tests;
+
+use Symfony\Component\ExpressionLanguage\Node\ConstantNode;
+use Symfony\Component\ExpressionLanguage\ParsedExpression;
+
+class ParsedExpressionTest extends \PHPUnit_Framework_TestCase
+{
+    public function testSerialization()
+    {
+        $expression = new ParsedExpression('25', new ConstantNode('25'));
+
+        $serializedExpression = serialize($expression);
+        $unserializedExpression = unserialize($serializedExpression);
+
+        $this->assertEquals($expression, $unserializedExpression);
+    }
+}