--- /dev/null
+<?php
+
+/*
+ * This file is part of the Behat.
+ * (c) Konstantin Kudryashov <ever.zet@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Behat\Behat\Context\Snippet\Generator;
+
+use Behat\Behat\Context\Environment\ContextEnvironment;
+
+/**
+ * Uses multiple child identifiers - the first one that returns non-null result would
+ * be the winner.
+ *
+ * This behaviour was introduced in 3.x to support the BC for interface-focused
+ * context identifier, while providing better user experience (no need to explicitly
+ * call `--snippets-for` on `--append-snippets` when contexts do not implement any
+ * snippet accepting interfaces).
+ */
+final class AggregateContextIdentifier implements TargetContextIdentifier
+{
+ /**
+ * @var TargetContextIdentifier[]
+ */
+ private $identifiers;
+
+ /**
+ * Initialises identifier.
+ *
+ * @param TargetContextIdentifier[] $identifiers
+ */
+ public function __construct(array $identifiers)
+ {
+ $this->identifiers = $identifiers;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function guessTargetContextClass(ContextEnvironment $environment)
+ {
+ foreach ($this->identifiers as $identifier) {
+ $contextClass = $identifier->guessTargetContextClass($environment);
+
+ if (null !== $contextClass) {
+ return $contextClass;
+ }
+ }
+
+ return null;
+ }
+}