diff --git a/src/Symfony/Component/Config/Definition/Builder/ArrayNodeDefinition.php b/src/Symfony/Component/Config/Definition/Builder/ArrayNodeDefinition.php
index dca5687a2045..e40d97b2fb89 100644
--- a/src/Symfony/Component/Config/Definition/Builder/ArrayNodeDefinition.php
+++ b/src/Symfony/Component/Config/Definition/Builder/ArrayNodeDefinition.php
@@ -523,4 +523,26 @@ public function getChildNodeDefinitions()
{
return $this->children;
}
+
+ /**
+ * Finds a node defined by the given $nodePath.
+ *
+ * @param string $nodePath The path of the node to find. e.g "doctrine.orm.mappings"
+ */
+ public function find(string $nodePath): NodeDefinition
+ {
+ $firstPathSegment = (false === $pathSeparatorPos = strpos($nodePath, $this->pathSeparator))
+ ? $nodePath
+ : substr($nodePath, 0, $pathSeparatorPos);
+
+ if (null === $node = ($this->children[$firstPathSegment] ?? null)) {
+ throw new \RuntimeException(sprintf('Node with name "%s" does not exist in the current node "%s".', $firstPathSegment, $this->name));
+ }
+
+ if (false === $pathSeparatorPos) {
+ return $node;
+ }
+
+ return $node->find(substr($nodePath, $pathSeparatorPos + \strlen($this->pathSeparator)));
+ }
}
diff --git a/src/Symfony/Component/Config/Tests/Definition/Builder/ArrayNodeDefinitionTest.php b/src/Symfony/Component/Config/Tests/Definition/Builder/ArrayNodeDefinitionTest.php
index 0aa2a08ab40c..0c414a9b9d26 100644
--- a/src/Symfony/Component/Config/Tests/Definition/Builder/ArrayNodeDefinitionTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/Builder/ArrayNodeDefinitionTest.php
@@ -13,6 +13,8 @@
use PHPUnit\Framework\TestCase;
use Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition;
+use Symfony\Component\Config\Definition\Builder\BooleanNodeDefinition;
+use Symfony\Component\Config\Definition\Builder\NodeDefinition;
use Symfony\Component\Config\Definition\Builder\ScalarNodeDefinition;
use Symfony\Component\Config\Definition\Exception\InvalidDefinitionException;
use Symfony\Component\Config\Definition\Processor;
@@ -357,6 +359,85 @@ public function testCannotBeEmptyOnConcreteNode()
$node->getNode()->finalize([]);
}
+ public function testFindShouldThrowExceptionIfNodeDoesNotExistInRootNode()
+ {
+ $this->expectException(\RuntimeException::class);
+ $this->expectExceptionMessage('Node with name "child" does not exist in the current node "root".');
+
+ $rootNode = new ArrayNodeDefinition('root');
+ $rootNode
+ ->children()
+ ->arrayNode('social_media_channels')->end()
+ ->end()
+ ;
+
+ $rootNode->find('child');
+ }
+
+ public function testFindShouldHandleComplexConfigurationProperly()
+ {
+ $rootNode = new ArrayNodeDefinition('root');
+ $rootNode
+ ->children()
+ ->arrayNode('social_media_channels')
+ ->children()
+ ->booleanNode('enable')->end()
+ ->arrayNode('twitter')->end()
+ ->arrayNode('facebook')->end()
+ ->arrayNode('instagram')
+ ->children()
+ ->booleanNode('enable')->end()
+ ->arrayNode('accounts')->end()
+ ->end()
+ ->end()
+ ->end()
+ ->append(
+ $mailerNode = (new ArrayNodeDefinition('mailer'))
+ ->children()
+ ->booleanNode('enable')->end()
+ ->arrayNode('transports')->end()
+ ->end()
+ )
+ ->end()
+ ;
+
+ $this->assertNode('social_media_channels', ArrayNodeDefinition::class, $rootNode->find('social_media_channels'));
+ $this->assertNode('enable', BooleanNodeDefinition::class, $rootNode->find('social_media_channels.enable'));
+ $this->assertNode('twitter', ArrayNodeDefinition::class, $rootNode->find('social_media_channels.twitter'));
+ $this->assertNode('facebook', ArrayNodeDefinition::class, $rootNode->find('social_media_channels.facebook'));
+ $this->assertNode('instagram', ArrayNodeDefinition::class, $rootNode->find('social_media_channels.instagram'));
+ $this->assertNode('enable', BooleanNodeDefinition::class, $rootNode->find('social_media_channels.instagram.enable'));
+ $this->assertNode('accounts', ArrayNodeDefinition::class, $rootNode->find('social_media_channels.instagram.accounts'));
+
+ $this->assertNode('enable', BooleanNodeDefinition::class, $mailerNode->find('enable'));
+ $this->assertNode('transports', ArrayNodeDefinition::class, $mailerNode->find('transports'));
+ }
+
+ public function testFindShouldWorkProperlyForNonDefaultPathSeparator()
+ {
+ $rootNode = new ArrayNodeDefinition('root');
+ $rootNode
+ ->setPathSeparator('.|')
+ ->children()
+ ->arrayNode('mailer.configuration')
+ ->children()
+ ->booleanNode('enable')->end()
+ ->arrayNode('transports')->end()
+ ->end()
+ ->end()
+ ;
+
+ $this->assertNode('mailer.configuration', ArrayNodeDefinition::class, $rootNode->find('mailer.configuration'));
+ $this->assertNode('enable', BooleanNodeDefinition::class, $rootNode->find('mailer.configuration.|enable'));
+ $this->assertNode('transports', ArrayNodeDefinition::class, $rootNode->find('mailer.configuration.|transports'));
+ }
+
+ protected function assertNode(string $expectedName, string $expectedType, NodeDefinition $actualNode): void
+ {
+ $this->assertInstanceOf($expectedType, $actualNode);
+ $this->assertSame($expectedName, $this->getField($actualNode, 'name'));
+ }
+
protected function getField($object, $field)
{
$reflection = new \ReflectionProperty($object, $field);
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