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CheckDefinitionValidityPass.php
01 <?php
02
03 /*
04 * This file is part of the Symfony package.
05 *
06 * (c) Fabien Potencier <fabien@symfony.com>
07 *
08 * For the full copyright and license information, please view the LICENSE
09 * file that was distributed with this source code.
10 */
11
12 namespace Symfony\Component\DependencyInjection\Compiler;
13
14 use Symfony\Component\DependencyInjection\ContainerBuilder;
15 use Symfony\Component\DependencyInjection\Exception\EnvParameterException;
16 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
17
18 /**
19 * This pass validates each definition individually only taking the information
20 * into account which is contained in the definition itself.
21 *
22 * Later passes can rely on the following, and specifically do not need to
23 * perform these checks themselves:
24 *
25 * - non synthetic, non abstract services always have a class set
26 * - synthetic services are always public
27 *
28 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
29 */
30 class CheckDefinitionValidityPass implements CompilerPassInterface
31 {
32 /**
33 * Processes the ContainerBuilder to validate the Definition.
34 *
35 * @throws RuntimeException When the Definition is invalid
36 */
37 public function process(ContainerBuilder $container)
38 {
39 foreach ($container->getDefinitions() as $id => $definition) {
40 // synthetic service is public
41 if ($definition->isSynthetic() && !($definition->isPublic() || $definition->isPrivate())) {
42 throw new RuntimeException(sprintf('A synthetic service ("%s") must be public.', $id));
43 }
44
45 // non-synthetic, non-abstract service has class
46 if (!$definition->isAbstract() && !$definition->isSynthetic() && !$definition->getClass()) {
47 if ($definition->getFactory()) {
48 throw new RuntimeException(sprintf('Please add the class to service "%s" even if it is constructed by a factory since we might need to add method calls based on compile-time checks.', $id));
49 }
50 if (class_exists($id) || interface_exists($id, false)) {
51 if (0 === strpos($id, '\\') && 1 < substr_count($id, '\\')) {
52 throw new RuntimeException(sprintf('The definition for "%s" has no class attribute, and appears to reference a class or interface. Please specify the class attribute explicitly or remove the leading backslash by renaming the service to "%s" to get rid of this error.', $id, substr($id, 1)));
53 }
54
55 throw new RuntimeException(sprintf('The definition for "%s" has no class attribute, and appears to reference a class or interface in the global namespace. Leaving out the "class" attribute is only allowed for namespaced classes. Please specify the class attribute explicitly to get rid of this error.', $id));
56 }
57
58 throw new RuntimeException(sprintf('The definition for "%s" has no class. If you intend to inject this service dynamically at runtime, please mark it as synthetic=true. If this is an abstract definition solely used by child definitions, please add abstract=true, otherwise specify a class to get rid of this error.', $id));
59 }
60
61 // tag attribute values must be scalars
62 foreach ($definition->getTags() as $name => $tags) {
63 foreach ($tags as $attributes) {
64 foreach ($attributes as $attribute => $value) {
65 if (!is_scalar($value) && null !== $value) {
66 throw new RuntimeException(sprintf('A "tags" attribute must be of a scalar-type for service "%s", tag "%s", attribute "%s".', $id, $name, $attribute));
67 }
68 }
69 }
70 }
71
72 if ($definition->isPublic() && !$definition->isPrivate()) {
73 $resolvedId = $container->resolveEnvPlaceholders($id, null, $usedEnvs);
74 if (null !== $usedEnvs) {
75 throw new EnvParameterException([$resolvedId], null, 'A service name ("%s") cannot contain dynamic values.');
76 }
77 }
78 }
79
80 foreach ($container->getAliases() as $id => $alias) {
81 if ($alias->isPublic() && !$alias->isPrivate()) {
82 $resolvedId = $container->resolveEnvPlaceholders($id, null, $usedEnvs);
83 if (null !== $usedEnvs) {
84 throw new EnvParameterException([$resolvedId], null, 'An alias name ("%s") cannot contain dynamic values.');
85 }
86 }
87 }
88 }
89 }
90