added optimized versions of expressions
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@ -24,6 +24,7 @@ use Symfony\Component\DependencyInjection\Reference;
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use Symfony\Component\DependencyInjection\Parameter;
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use Symfony\Component\Config\FileLocator;
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use Symfony\Component\ExpressionLanguage\Expression;
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use Symfony\Component\Security\Core\Authorization\ExpressionLanguage;
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/**
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* SecurityExtension.
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@ -39,6 +40,7 @@ class SecurityExtension extends Extension
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private $listenerPositions = array('pre_auth', 'form', 'http', 'remember_me');
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private $factories = array();
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private $userProviderFactories = array();
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private $expressionLanguage;
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public function __construct()
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{
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@ -610,9 +612,10 @@ class SecurityExtension extends Extension
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}
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$container
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->register($id, 'Symfony\Component\ExpressionLanguage\Expression')
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->register($id, 'Symfony\Component\ExpressionLanguage\SerializedParsedExpression')
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->setPublic(false)
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->addArgument($expression)
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->addArgument(serialize($this->getExpressionLanguage()->parse($expression, array('token', 'user', 'object', 'roles', 'request'))))
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;
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return $this->expressions[$id] = new Reference($id);
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@ -676,4 +679,16 @@ class SecurityExtension extends Extension
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// first assemble the factories
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return new MainConfiguration($this->factories, $this->userProviderFactories);
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}
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private function getExpressionLanguage()
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{
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if (null === $this->expressionLanguage) {
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if (!class_exists('Symfony\Component\ExpressionLanguage\ExpressionLanguage')) {
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throw new RuntimeException('Unable to use expressions as the Symfony ExpressionLanguage component is not installed.');
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}
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$this->expressionLanguage = new ExpressionLanguage();
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}
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return $this->expressionLanguage;
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}
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}
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@ -18,7 +18,7 @@ namespace Symfony\Component\ExpressionLanguage;
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*/
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class Expression
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{
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private $expression;
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protected $expression;
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/**
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* Constructor.
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@ -11,6 +11,8 @@
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namespace Symfony\Component\ExpressionLanguage;
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use Symfony\Component\ExpressionLanguage\Node\Node;
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/**
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* Allows to compile and evaluate expressions written in your own DSL.
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*
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@ -44,9 +46,41 @@ class ExpressionLanguage
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return $this->getCompiler()->compile($this->parse($expression, $names))->getSource();
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}
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/**
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* Evaluate an expression.
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*
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* @param Expression|string $expression The expression to compile
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* @param array $values An array of values
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*
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* @return string The result of the evaluation of the expression
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*/
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public function evaluate($expression, $values = array())
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{
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return $this->parse($expression, array_keys($values))->evaluate($this->functions, $values);
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if ($expression instanceof ParsedExpression) {
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$expression = $expression->getNodes();
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} else {
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$expression = $this->parse($expression, array_keys($values));
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}
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return $expression->evaluate($this->functions, $values);
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}
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/**
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* Parses an expression.
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*
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* @param Expression|string $expression The expression to parse
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*
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* @return Node A Node tree
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*/
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public function parse($expression, $names)
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{
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$key = $expression.'//'.implode('-', $names);
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if (!isset($this->cache[$key])) {
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$this->cache[$key] = $this->getParser()->parse($this->getLexer()->tokenize((string) $expression), $names);
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}
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return $this->cache[$key];
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}
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public function addFunction($name, $compiler, $evaluator)
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@ -89,15 +123,4 @@ class ExpressionLanguage
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return $this->compiler->reset();
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}
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private function parse($expression, $names)
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{
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$key = $expression.'//'.implode('-', $names);
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if (!isset($this->cache[$key])) {
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$this->cache[$key] = $this->getParser()->parse($this->getLexer()->tokenize((string) $expression), $names);
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}
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return $this->cache[$key];
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}
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}
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@ -0,0 +1,42 @@
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\ExpressionLanguage;
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use Symfony\Component\ExpressionLanguage\Node\Node;
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/**
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* Represents an already parsed expression.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class ParsedExpression extends Expression
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{
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private $nodes;
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/**
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* Constructor.
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*
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* @param string $expression An expression
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* @param Node $nodes A Node representing the expression
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*/
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public function __construct($expression, Node $nodes)
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{
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parent::__construct($expression);
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$this->nodes = $nodes;
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}
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public function getNodes()
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{
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return $this->nodes;
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}
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}
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@ -0,0 +1,41 @@
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\ExpressionLanguage;
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use Symfony\Component\ExpressionLanguage\Node\Node;
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/**
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* Represents an already parsed expression.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class SerializedParsedExpression extends ParsedExpression
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{
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private $nodes;
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/**
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* Constructor.
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*
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* @param string $expression An expression
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* @param string $nodes The serialized nodes for the expression
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*/
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public function __construct($expression, $nodes)
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{
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$this->expression = (string) $expression;
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$this->nodes = $nodes;
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}
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public function getNodes()
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{
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return unserialize($this->nodes);
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}
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}
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