中文注释版 Laravel 容器类（Container）
将 Laravel 的
illuminate/container 移除掉
illuminate/contracts 依赖，便于灵活的在非 Laravel 框架中使用，顺便机翻了一下
illuminate/container 的注释，便于理解 Laravel 的容器。
相关链接
代码
*
* This source file is subject to the MIT license that is bundled.
*/
namespace Guanguans\Di;
use ArrayAccess;
use Closure;
use LogicException;
use Psr\Container\ContainerInterface;
use ReflectionClass;
use ReflectionParameter;
/**
* This file is modified from `illuminate/container`.
*
* @see https://github.com/illuminate/container
*/
class Container implements ArrayAccess, ContainerInterface
{
/**
* The current globally available container (if any).
* 当前的全局可用容器（如果有）。
*
* @var static
*/
protected static $instance;
/**
* An array of the types that have been resolved.
* 已解析类型的数组。
*
* @var array
*/
protected $resolved = [];
/**
* The container's bindings.
* 容器的绑定。
*
* @var array
*/
protected $bindings = [];
/**
* The container's method bindings.
* 容器的方法绑定。
*
* @var array
*/
protected $methodBindings = [];
/**
* The container's shared instances.
* 容器的共享实例。
*
* @var array
*/
protected $instances = [];
/**
* The registered type aliases.
* 注册的类型别名。
*
* @var array
*/
protected $aliases = [];
/**
* The registered aliases keyed by the abstract name.
* 以抽象名称为关键字的注册别名。
*
* @var array
*/
protected $abstractAliases = [];
/**
* The extension closures for services.
* 服务的扩展名闭包。
*
* @var array
*/
protected $extenders = [];
/**
* All of the registered tags.
* 所有注册的标签。
*
* @var array
*/
protected $tags = [];
/**
* The stack of concretions currently being built.
* 目前正在构建的堆栈。
*
* @var array
*/
protected $buildStack = [];
/**
* The parameter override stack.
* 参数覆盖堆栈。
*
* @var array
*/
protected $with = [];
/**
* The contextual binding map.
* 上下文绑定图。
*
* @var array
*/
public $contextual = [];
/**
* All of the registered rebound callbacks.
* 所有已注册的反弹回调。
*
* @var array
*/
protected $reboundCallbacks = [];
/**
* All of the global resolving callbacks.
* 所有全局解析回调。
*
* @var array
*/
protected $globalResolvingCallbacks = [];
/**
* All of the global after resolving callbacks.
* 解决回调后的所有全局变量。
*
* @var array
*/
protected $globalAfterResolvingCallbacks = [];
/**
* All of the resolving callbacks by class type.
* 按类类型的所有解析回调。
*
* @var array
*/
protected $resolvingCallbacks = [];
/**
* All of the after resolving callbacks by class type.
* 所有按类类型解析后的回调。
*
* @var array
*/
protected $afterResolvingCallbacks = [];
/**
* Define a contextual binding.
* 定义上下文绑定。
*
* @param string $concrete
* @return \Guanguans\Di\ContextualBindingBuilder
*/
public function when($concrete)
{
return new ContextualBindingBuilder($this, $this->getAlias($concrete));
}
/**
* Determine if the given abstract type has been bound.
* 确定给定的抽象类型是否已绑定。
*
* @param string $abstract
* @return bool
*/
public function bound($abstract)
{
return isset($this->bindings[$abstract]) ||
isset($this->instances[$abstract]) ||
$this->isAlias($abstract);
}
/**
* Determine if the given abstract type has been resolved.
* 确定给定的抽象类型是否已解析。
*
* @param string $abstract
* @return bool
*/
public function resolved($abstract)
{
if ($this->isAlias($abstract)) {
$abstract = $this->getAlias($abstract);
}
return isset($this->resolved[$abstract]) ||
isset($this->instances[$abstract]);
}
/**
* Determine if a given type is shared.
* 确定给定类型是否共享。
*
* @param string $abstract
* @return bool
*/
public function isShared($abstract)
{
return isset($this->instances[$abstract]) ||
(isset($this->bindings[$abstract]['shared']) &&
$this->bindings[$abstract]['shared'] === true);
}
/**
* Determine if a given string is an alias.
* 确定给定的字符串是否为别名
*
* @param string $name
* @return bool
*/
public function isAlias($name)
{
return isset($this->aliases[$name]);
}
/**
* Register a binding with the container.
* 在容器中注册绑定
*
* @param string|array $abstract
* @param \Closure|string|null $concrete
* @param bool $shared
* @return void
*/
public function bind($abstract, $concrete = null, $shared = false)
{
// If no concrete type was given, we will simply set the concrete type to the
// abstract type. After that, the concrete type to be registered as shared
// without being forced to state their classes in both of the parameters.
// 如果没有给出具体类型，我们将简单地将具体类型设置为抽象类型。
// 之后，要注册为共享的具体类型，而不必强制在两个参数中声明其类。
$this->dropStaleInstances($abstract);
if (is_null($concrete)) {
$concrete = $abstract;
}
// If the factory is not a Closure, it means it is just a class name which is
// bound into this container to the abstract type and we will just wrap it
// up inside its own Closure to give us more convenience when extending.
// 如果工厂不是 Closure，则意味着它只是一个类名称，
// 该类名称绑定到此容器中，与抽象类型绑定，
// 我们将其包装在自己的 Closure 中，以便在扩展时为我们提供更多便利。
if (! $concrete instanceof Closure) {
$concrete = $this->getClosure($abstract, $concrete);
}
$this->bindings[$abstract] = compact('concrete', 'shared');
// If the abstract type was already resolved in this container we'll fire the
// rebound listener so that any objects which have already gotten resolved
// can have their copy of the object updated via the listener callbacks.
// 如果抽象类型已在此容器中解析，我们将触发回弹侦听器，
// 以便所有已解析的对象都可以通过侦听器回调更新其对象副本。
if ($this->resolved($abstract)) {
$this->rebound($abstract);
}
}
/**
* Get the Closure to be used when building a type.
* 获取要在构建类型时使用的闭包。
*
* @param string $abstract
* @param string $concrete
* @return \Closure
*/
protected function getClosure($abstract, $concrete)
{
return function ($container, $parameters = []) use ($abstract, $concrete) {
if ($abstract == $concrete) {
return $container->build($concrete);
}
return $container->makeWith($concrete, $parameters);
};
}
/**
* Determine if the container has a method binding.
* 确定容器是否具有方法绑定。
*
* @param string $method
* @return bool
*/
public function hasMethodBinding($method)
{
return isset($this->methodBindings[$method]);
}
/**
* Bind a callback to resolve with Container::call.
* 绑定回调以使用 Container::call 进行解析。
*
* @param string $method
* @param \Closure $callback
* @return void
*/
public function bindMethod($method, $callback)
{
$this->methodBindings[$method] = $callback;
}
/**
* Get the method binding for the given method.
* 获取给定方法的方法绑定。
*
* @param string $method
* @param mixed $instance
* @return mixed
*/
public function callMethodBinding($method, $instance)
{
return call_user_func($this->methodBindings[$method], $instance, $this);
}
/**
* Add a contextual binding to the container.
* 将上下文绑定添加到容器。
*
* @param string $concrete
* @param string $abstract
* @param \Closure|string $implementation
* @return void
*/
public function addContextualBinding($concrete, $abstract, $implementation)
{
$this->contextual[$concrete][$this->getAlias($abstract)] = $implementation;
}
/**
* Register a binding if it hasn't already been registered.
* 注册绑定（如果尚未注册）。
*
* @param string $abstract
* @param \Closure|string|null $concrete
* @param bool $shared
* @return void
*/
public function bindIf($abstract, $concrete = null, $shared = false)
{
if (! $this->bound($abstract)) {
$this->bind($abstract, $concrete, $shared);
}
}
/**
* Register a shared binding in the container.
* 在容器中注册共享绑定。
*
* @param string|array $abstract
* @param \Closure|string|null $concrete
* @return void
*/
public function singleton($abstract, $concrete = null)
{
$this->bind($abstract, $concrete, true);
}
/**
* "Extend" an abstract type in the container.
* “扩展”容器中的抽象类型。
*
* @param string $abstract
* @param \Closure $closure
* @return void
*
* @throws \InvalidArgumentException
*/
public function extend($abstract, Closure $closure)
{
$abstract = $this->getAlias($abstract);
if (isset($this->instances[$abstract])) {
$this->instances[$abstract] = $closure($this->instances[$abstract], $this);
$this->rebound($abstract);
} else {
$this->extenders[$abstract][] = $closure;
if ($this->resolved($abstract)) {
$this->rebound($abstract);
}
}
}
/**
* Register an existing instance as shared in the container.
* 将现有实例注册为在容器中共享的实例。
*
* @param string $abstract
* @param mixed $instance
* @return void
*/
public function instance($abstract, $instance)
{
$this->removeAbstractAlias($abstract);
$isBound = $this->bound($abstract);
unset($this->aliases[$abstract]);
// We'll check to determine if this type has been bound before, and if it has
// we will fire the rebound callbacks registered with the container and it
// can be updated with consuming classes that have gotten resolved here.
// 我们将检查以确定此类型是否以前已绑定，
// 如果已经绑定，将触发在容器中注册的反弹回调，
// 并且可以使用在这里已解决的消耗类进行更新。
$this->instances[$abstract] = $instance;
if ($isBound) {
$this->rebound($abstract);
}
}
/**
* Remove an alias from the contextual binding alias cache.
* 从上下文绑定别名缓存中删除别名。
*
* @param string $searched
* @return void
*/
protected function removeAbstractAlias($searched)
{
if (! isset($this->aliases[$searched])) {
return;
}
foreach ($this->abstractAliases as $abstract => $aliases) {
foreach ($aliases as $index => $alias) {
if ($alias == $searched) {
unset($this->abstractAliases[$abstract][$index]);
}
}
}
}
/**
* Assign a set of tags to a given binding.
* 将一组标签分配给给定的绑定。
*
* @param array|string $abstracts
* @param array|mixed ...$tags
* @return void
*/
public function tag($abstracts, $tags)
{
$tags = is_array($tags) ? $tags : array_slice(func_get_args(), 1);
foreach ($tags as $tag) {
if (! isset($this->tags[$tag])) {
$this->tags[$tag] = [];
}
foreach ((array) $abstracts as $abstract) {
$this->tags[$tag][] = $abstract;
}
}
}
/**
* Resolve all of the bindings for a given tag.
* 解决给定标签的所有绑定。
*
* @param string $tag
* @return array
*/
public function tagged($tag)
{
$results = [];
if (isset($this->tags[$tag])) {
foreach ($this->tags[$tag] as $abstract) {
$results[] = $this->make($abstract);
}
}
return $results;
}
/**
* Alias a type to a different name.
* 将别名别名为另一个名称。
*
* @param string $abstract
* @param string $alias
* @return void
*/
public function alias($abstract, $alias)
{
$this->aliases[$alias] = $abstract;
$this->abstractAliases[$abstract][] = $alias;
}
/**
* Bind a new callback to an abstract's rebind event.
* 绑定一个新的回调到抽象的重新绑定事件。
*
* @param string $abstract
* @param \Closure $callback
* @return mixed
*/
public function rebinding($abstract, Closure $callback)
{
$this->reboundCallbacks[$abstract = $this->getAlias($abstract)][] = $callback;
if ($this->bound($abstract)) {
return $this->make($abstract);
}
}
/**
* Refresh an instance on the given target and method.
* 在给定的目标和方法上刷新实例。
*
* @param string $abstract
* @param mixed $target
* @param string $method
* @return mixed
*/
public function refresh($abstract, $target, $method)
{
return $this->rebinding($abstract, function ($app, $instance) use ($target, $method) {
$target->{$method}($instance);
});
}
/**
* Fire the "rebound" callbacks for the given abstract type.
* 为给定的抽象类型触发“反弹”回调。
*
* @param string $abstract
* @return void
*/
protected function rebound($abstract)
{
$instance = $this->make($abstract);
foreach ($this->getReboundCallbacks($abstract) as $callback) {
call_user_func($callback, $this, $instance);
}
}
/**
* Get the rebound callbacks for a given type.
* 获取给定类型的反弹回调
*
* @param string $abstract
* @return array
*/
protected function getReboundCallbacks($abstract)
{
if (isset($this->reboundCallbacks[$abstract])) {
return $this->reboundCallbacks[$abstract];
}
return [];
}
/**
* Wrap the given closure such that its dependencies will be injected when executed.
* 包装给定的闭包，以便在执行时注入其依赖项。
*
* @param \Closure $callback
* @param array $parameters
* @return \Closure
*/
public function wrap(Closure $callback, array $parameters = [])
{
return function () use ($callback, $parameters) {
return $this->call($callback, $parameters);
};
}
/**
* Call the given Closure / class@method and inject its dependencies.
* 调用给定的 Closure / class@method 并注入其依赖项。
*
* @param callable|string $callback
* @param array $parameters
* @param string|null $defaultMethod
* @return mixed
*/
public function call($callback, array $parameters = [], $defaultMethod = null)
{
return BoundMethod::call($this, $callback, $parameters, $defaultMethod);
}
/**
* Get a closure to resolve the given type from the container.
* 获取一个容器来解析给定类型的闭包。
*
* @param string $abstract
* @return \Closure
*/
public function factory($abstract)
{
return function () use ($abstract) {
return $this->make($abstract);
};
}
/**
* Resolve the given type with the given parameter overrides.
* 使用给定的参数覆盖解析给定的类型。
*
* @param string $abstract
* @param array $parameters
* @return mixed
*/
public function makeWith($abstract, array $parameters)
{
return $this->resolve($abstract, $parameters);
}
/**
* Resolve the given type from the container.
* 从容器解析给定类型。
*
* @param string $abstract
* @return mixed
*/
public function make($abstract)
{
return $this->resolve($abstract);
}
/**
* Resolve the given type from the container.
* 从容器解析给定类型。
*
* @param string $abstract
* @param array $parameters
* @return mixed
*/
protected function resolve($abstract, $parameters = [])
{
$abstract = $this->getAlias($abstract);
$needsContextualBuild = ! empty($parameters) || ! is_null(
$this->getContextualConcrete($abstract)
);
// If an instance of the type is currently being managed as a singleton we'll
// just return an existing instance instead of instantiating new instances
// so the developer can keep using the same objects instance every time.
// 如果当前正在以单例方式管理该类型的实例，
// 我们将只返回一个现有实例，而不是实例化新实例，
// 以便开发人员每次都可以继续使用相同的对象实例。
if (isset($this->instances[$abstract]) && ! $needsContextualBuild) {
return $this->instances[$abstract];
}
$this->with[] = $parameters;
$concrete = $this->getConcrete($abstract);
// We're ready to instantiate an instance of the concrete type registered for
// the binding. This will instantiate the types, as well as resolve any of
// its "nested" dependencies recursively until all have gotten resolved.
// 我们已经准备好实例化为绑定注册的具体类型的实例。
// 这将实例化类型，并以递归方式解析其“嵌套”依赖项中的任何一个，直到全部解析完毕。
if ($this->isBuildable($concrete, $abstract)) {
$object = $this->build($concrete);
} else {
$object = $this->make($concrete);
}
// If we defined any extenders for this type, we'll need to spin through them
// and apply them to the object being built. This allows for the extension
// of services, such as changing configuration or decorating the object.
// 如果我们为此类型定义了任何扩展程序，则需要遍历它们并将其应用于正在构建的对象。
// 这允许扩展服务，例如更改配置或装饰对象。
foreach ($this->getExtenders($abstract) as $extender) {
$object = $extender($object, $this);
}
// If the requested type is registered as a singleton we'll want to cache off
// the instances in "memory" so we can return it later without creating an
// entirely new instance of an object on each subsequent request for it.
// 如果将请求的类型注册为单例，我们将将实例缓存在“内存”中，
// 这样我们以后就可以返回它，而无需在随后的每次请求上都创建对象的全新实例。
if ($this->isShared($abstract) && ! $needsContextualBuild) {
$this->instances[$abstract] = $object;
}
$this->fireResolvingCallbacks($abstract, $object);
// Before returning, we will also set the resolved flag to "true" and pop off
// the parameter overrides for this build. After those two things are done
// we will be ready to return back the fully constructed class instance.
// 在返回之前，我们还将解析标记设置为 “true”，并弹出此版本的参数替代。
// 完成这两件事之后，我们将准备好返回完整构造的类实例。
$this->resolved[$abstract] = true;
array_pop($this->with);
return $object;
}
/**
* Get the concrete type for a given abstract.
* 获取给定摘要的具体类型。
*
* @param string $abstract
* @return mixed $concrete
*/
protected function getConcrete($abstract)
{
if (! is_null($concrete = $this->getContextualConcrete($abstract))) {
return $concrete;
}
// If we don't have a registered resolver or concrete for the type, we'll just
// assume each type is a concrete name and will attempt to resolve it as is
// since the container should be able to resolve concretes automatically.
// 如果我们没有该类型的注册解析器或具体对象，我们将假设每种类型都是具体名称，
// 并尝试按原样解析它，因为容器应该能够自动解析具体对象。
if (isset($this->bindings[$abstract])) {
return $this->bindings[$abstract]['concrete'];
}
return $abstract;
}
/**
* Get the contextual concrete binding for the given abstract.
* 获取给定摘要的上下文具体绑定。
*
* @param string $abstract
* @return string|null
*/
protected function getContextualConcrete($abstract)
{
if (! is_null($binding = $this->findInContextualBindings($abstract))) {
return $binding;
}
// Next we need to see if a contextual binding might be bound under an alias of the
// given abstract type. So, we will need to check if any aliases exist with this
// type and then spin through them and check for contextual bindings on these.
// 接下来，我们需要查看是否可以在给定抽象类型的别名下绑定上下文绑定。
// 因此，我们将需要检查此类型是否存在别名，然后旋转它们并检查这些别名的上下文绑定。
if (empty($this->abstractAliases[$abstract])) {
return;
}
foreach ($this->abstractAliases[$abstract] as $alias) {
if (! is_null($binding = $this->findInContextualBindings($alias))) {
return $binding;
}
}
}
/**
* Find the concrete binding for the given abstract in the contextual binding array.
* 在上下文绑定数组中找到给定摘要的具体绑定
*
* @param string $abstract
* @return string|null
*/
protected function findInContextualBindings($abstract)
{
if (isset($this->contextual[end($this->buildStack)][$abstract])) {
return $this->contextual[end($this->buildStack)][$abstract];
}
}
/**
* Determine if the given concrete is buildable.
* 确定给定的具体是否可构建。
*
* @param mixed $concrete
* @param string $abstract
* @return bool
*/
protected function isBuildable($concrete, $abstract)
{
return $concrete === $abstract || $concrete instanceof Closure;
}
/**
* Instantiate a concrete instance of the given type.
* 实例化给定类型的具体实例。
*
* @param string $concrete
* @return mixed
*
* @throws \Guanguans\Di\BindingResolutionException
*/
public function build($concrete)
{
// If the concrete type is actually a Closure, we will just execute it and
// hand back the results of the functions, which allows functions to be
// used as resolvers for more fine-tuned resolution of these objects.
// 如果具体类型实际上是 Closure，我们将直接执行它并返回函数的结果，
// 这允许将函数用作解析器，以便对这些对象进行更精细的解析。
if ($concrete instanceof Closure) {
return $concrete($this, $this->getLastParameterOverride());
}
$reflector = new ReflectionClass($concrete);
// If the type is not instantiable, the developer is attempting to resolve
// an abstract type such as an Interface of Abstract Class and there is
// no binding registered for the abstractions so we need to bail out.
// 如果类型不是可实例化的，则开发人员正尝试解析抽象类型，
// 例如 Abstract Class 的接口，并且没有为抽象注册任何绑定，因此我们需要纾困。
if (! $reflector->isInstantiable()) {
return $this->notInstantiable($concrete);
}
$this->buildStack[] = $concrete;
$constructor = $reflector->getConstructor();
// If there are no constructors, that means there are no dependencies then
// we can just resolve the instances of the objects right away, without
// resolving any other types or dependencies out of these containers.
// 如果没有构造函数，则意味着没有依赖项，我们可以立即解析对象的实例，
// 而无需从这些容器中解析任何其他类型或依赖项。
if (is_null($constructor)) {
array_pop($this->buildStack);
return new $concrete;
}
$dependencies = $constructor->getParameters();
// Once we have all the constructor's parameters we can create each of the
// dependency instances and then use the reflection instances to make a
// new instance of this class, injecting the created dependencies in.
// 一旦有了所有构造函数的参数，就可以创建每个依赖实例，
// 然后使用反射实例创建此类的新实例，将创建的依赖注入其中。
$instances = $this->resolveDependencies(
$dependencies
);
array_pop($this->buildStack);
return $reflector->newInstanceArgs($instances);
}
/**
* Resolve all of the dependencies from the ReflectionParameters.
* 从 ReflectionParameters 解析所有依赖项。
*
* @param array $dependencies
* @return array
*/
protected function resolveDependencies(array $dependencies)
{
$results = [];
foreach ($dependencies as $dependency) {
// If this dependency has a override for this particular build we will use
// that instead as the value. Otherwise, we will continue with this run
// of resolutions and let reflection attempt to determine the result.
// 如果此依赖项对此特定构建具有替代，我们将使用作为值。
// 否则，我们将继续执行的分辨率，并让反射尝试确定结果。
if ($this->hasParameterOverride($dependency)) {
$results[] = $this->getParameterOverride($dependency);
continue;
}
// If the class is null, it means the dependency is a string or some other
// primitive type which we can not resolve since it is not a class and
// we will just bomb out with an error since we have no-where to go.
// 如果该类为 null，则表示依赖项是字符串或其他类型的原始类型，
// 由于它不是类，因此我们无法解析，并且由于没有位置，我们将抛出错误去。
$results[] = is_null($class = $dependency->getClass())
? $this->resolvePrimitive($dependency)
: $this->resolveClass($dependency);
}
return $results;
}
/**
* Determine if the given dependency has a parameter override from makeWith.
* 确定给定的依赖项是否具有来自 makeWith 的参数重写。
*
* @param \ReflectionParameter $dependency
* @return bool
*/
protected function hasParameterOverride($dependency)
{
return array_key_exists(
$dependency->name,
$this->getLastParameterOverride()
);
}
/**
* Get a parameter override for a dependency.
* 获取依赖项的参数覆盖。
*
* @param \ReflectionParameter $dependency
* @return mixed
*/
protected function getParameterOverride($dependency)
{
return $this->getLastParameterOverride()[$dependency->name];
}
/**
* Get the last parameter override.
* 获取最后一个参数覆盖。
*
* @return array
*/
protected function getLastParameterOverride()
{
return count($this->with) ? end($this->with) : [];
}
/**
* Resolve a non-class hinted primitive dependency.
* 解析非类提示的原始依赖项。
*
* @param \ReflectionParameter $parameter
* @return mixed
*
* @throws \Guanguans\Di\BindingResolutionException
*/
protected function resolvePrimitive(ReflectionParameter $parameter)
{
if (! is_null($concrete = $this->getContextualConcrete('$'.$parameter->name))) {
return $concrete instanceof Closure ? $concrete($this) : $concrete;
}
if ($parameter->isDefaultValueAvailable()) {
return $parameter->getDefaultValue();
}
$this->unresolvablePrimitive($parameter);
}
/**
* Resolve a class based dependency from the container.
* 解析容器中基于类的依赖关系。
*
* @param \ReflectionParameter $parameter
* @return mixed
*
* @throws \Guanguans\Di\BindingResolutionException
*/
protected function resolveClass(ReflectionParameter $parameter)
{
try {
return $this->make($parameter->getClass()->name);
}
// If we can not resolve the class instance, we will check to see if the value
// is optional, and if it is we will return the optional parameter value as
// the value of the dependency, similarly to how we do this with scalars.
// 如果无法解析类实例，则将检查该值是否为可选，如果为可选，
// 们将返回可选参数 value 作为依赖项的值，类似于执行此操作的方式标量。
catch (BindingResolutionException $e) {
if ($parameter->isOptional()) {
return $parameter->getDefaultValue();
}
throw $e;
}
}
/**
* Throw an exception that the concrete is not instantiable.
* 抛出一个具体无法实例化的异常。
*
* @param string $concrete
* @return void
*
* @throws \Guanguans\Di\BindingResolutionException
*/
protected function notInstantiable($concrete)
{
if (! empty($this->buildStack)) {
$previous = implode(', ', $this->buildStack);
$message = "Target [$concrete] is not instantiable while building [$previous].";
} else {
$message = "Target [$concrete] is not instantiable.";
}
throw new BindingResolutionException($message);
}
/**
* Throw an exception for an unresolvable primitive.
* 为无法解析的原语抛出异常。
*
* @param \ReflectionParameter $parameter
* @return void
*
* @throws \Guanguans\Di\BindingResolutionException
*/
protected function unresolvablePrimitive(ReflectionParameter $parameter)
{
$message = "Unresolvable dependency resolving [$parameter] in class {$parameter->getDeclaringClass()->getName()}";
throw new BindingResolutionException($message);
}
/**
* Register a new resolving callback.
* 注册一个新的解析回调。
*
* @param string $abstract
* @param \Closure|null $callback
* @return void
*/
public function resolving($abstract, Closure $callback = null)
{
if (is_string($abstract)) {
$abstract = $this->getAlias($abstract);
}
if (is_null($callback) && $abstract instanceof Closure) {
$this->globalResolvingCallbacks[] = $abstract;
} else {
$this->resolvingCallbacks[$abstract][] = $callback;
}
}
/**
* Register a new after resolving callback for all types.
* 在解析所有类型的回调之后注册一个新的。
*
* @param string $abstract
* @param \Closure|null $callback
* @return void
*/
public function afterResolving($abstract, Closure $callback = null)
{
if (is_string($abstract)) {
$abstract = $this->getAlias($abstract);
}
if ($abstract instanceof Closure && is_null($callback)) {
$this->globalAfterResolvingCallbacks[] = $abstract;
} else {
$this->afterResolvingCallbacks[$abstract][] = $callback;
}
}
/**
* Fire all of the resolving callbacks.
* 触发所有解析的回调。
*
* @param string $abstract
* @param mixed $object
* @return void
*/
protected function fireResolvingCallbacks($abstract, $object)
{
$this->fireCallbackArray($object, $this->globalResolvingCallbacks);
$this->fireCallbackArray(
$object,
$this->getCallbacksForType($abstract, $object, $this->resolvingCallbacks)
);
$this->fireAfterResolvingCallbacks($abstract, $object);
}
/**
* Fire all of the after resolving callbacks.
* 解决回调后，请执行所有操作。
*
* @param string $abstract
* @param mixed $object
* @return void
*/
protected function fireAfterResolvingCallbacks($abstract, $object)
{
$this->fireCallbackArray($object, $this->globalAfterResolvingCallbacks);
$this->fireCallbackArray(
$object,
$this->getCallbacksForType($abstract, $object, $this->afterResolvingCallbacks)
);
}
/**
* Get all callbacks for a given type.
* 获取给定类型的所有回调。
*
* @param string $abstract
* @param object $object
* @param array $callbacksPerType
*
* @return array
*/
protected function getCallbacksForType($abstract, $object, array $callbacksPerType)
{
$results = [];
foreach ($callbacksPerType as $type => $callbacks) {
if ($type === $abstract || $object instanceof $type) {
$results = array_merge($results, $callbacks);
}
}
return $results;
}
/**
* Fire an array of callbacks with an object.
* 触发带有对象的回调数组。
*
* @param mixed $object
* @param array $callbacks
* @return void
*/
protected function fireCallbackArray($object, array $callbacks)
{
foreach ($callbacks as $callback) {
$callback($object, $this);
}
}
/**
* Get the container's bindings.
* 获取容器的绑定。
*
* @return array
*/
public function getBindings()
{
return $this->bindings;
}
/**
* Get the alias for an abstract if available.
* 获取摘要的别名（如果有）。
*
* @param string $abstract
* @return string
*
* @throws \LogicException
*/
public function getAlias($abstract)
{
if (! isset($this->aliases[$abstract])) {
return $abstract;
}
if ($this->aliases[$abstract] === $abstract) {
throw new LogicException("[{$abstract}] is aliased to itself.");
}
return $this->getAlias($this->aliases[$abstract]);
}
/**
* Get the extender callbacks for a given type.
* 获取给定类型的扩展程序回调。
*
* @param string $abstract
* @return array
*/
protected function getExtenders($abstract)
{
$abstract = $this->getAlias($abstract);
if (isset($this->extenders[$abstract])) {
return $this->extenders[$abstract];
}
return [];
}
/**
* Remove all of the extender callbacks for a given type.
* 删除给定类型的所有扩展器回调。
*
* @param string $abstract
* @return void
*/
public function forgetExtenders($abstract)
{
unset($this->extenders[$this->getAlias($abstract)]);
}
/**
* Drop all of the stale instances and aliases.
* 删除所有过时的实例和别名。
*
* @param string $abstract
* @return void
*/
protected function dropStaleInstances($abstract)
{
unset($this->instances[$abstract], $this->aliases[$abstract]);
}
/**
* Remove a resolved instance from the instance cache.
* 从实例缓存中删除已解析的实例。
*
* @param string $abstract
* @return void
*/
public function forgetInstance($abstract)
{
unset($this->instances[$abstract]);
}
/**
* Clear all of the instances from the container.
* 从容器中清除所有实例。
*
* @return void
*/
public function forgetInstances()
{
$this->instances = [];
}
/**
* Flush the container of all bindings and resolved instances.
* 刷新容器中的所有绑定和已解决的实例。
*
* @return void
*/
public function flush()
{
$this->aliases = [];
$this->resolved = [];
$this->bindings = [];
$this->instances = [];
$this->abstractAliases = [];
}
/**
* Set the globally available instance of the container.
* 设置容器的全局可用实例。
*
* @return static
*/
public static function getInstance()
{
if (is_null(static::$instance)) {
static::$instance = new static;
}
return static::$instance;
}
/**
* Set the shared instance of the container.
* 设置容器的共享实例。
*
* @param \Guanguans\Di\Container|null $container
* @return static
*/
public static function setInstance(Container $container = null)
{
return static::$instance = $container;
}
/**
* Determine if a given offset exists.
* 确定是否存在给定的 key 。
*
* @param string $key
* @return bool
*/
public function offsetExists($key)
{
return $this->bound($key);
}
/**
* Get the value at a given offset.
* 获取给定 key 的值。
*
* @param string $key
* @return mixed
*/
public function offsetGet($key)
{
return $this->make($key);
}
/**
* Set the value at a given offset.
* 将值设置为给定的 key 。
*
* @param string $key
* @param mixed $value
* @return void
*/
public function offsetSet($key, $value)
{
$this->bind($key, $value instanceof Closure ? $value : function () use ($value) {
return $value;
});
}
/**
* Unset the value at a given offset.
* 以给定 key 取消设置值。
*
* @param string $key
* @return void
*/
public function offsetUnset($key)
{
unset($this->bindings[$key], $this->instances[$key], $this->resolved[$key]);
}
/**
* Dynamically access container services.
* 动态访问容器服务。
*
* @param string $key
* @return mixed
*/
public function __get($key)
{
return $this[$key];
}
/**
* Dynamically set container services.
* 动态设置容器服务。
*
* @param string $key
* @param mixed $value
* @return void
*/
public function __set($key, $value)
{
$this[$key] = $value;
}
/**
* 通过其标识符查找容器的条目并返回它。
*
* @inheritDoc
*/
public function has($id)
{
return $this->offsetExists($id);
}
/**
* 如果容器可以返回给定标识符的条目，则返回 true 。 否则返回 false 。
*
* @inheritDoc
*/
public function get($id)
{
return $this[$id];
}
}
