$instance
$instance : \think\Container|\Closure
容器对象实例
容器管理类 支持PSR-11
$instance : \think\Container|\Closure
容器对象实例
$instances : array
容器中的对象实例
$bind : array
容器绑定标识
$invokeCallback : array
容器回调
<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2021 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
declare (strict_types = 1);
namespace think;
use ArrayAccess;
use ArrayIterator;
use Closure;
use Countable;
use InvalidArgumentException;
use IteratorAggregate;
use Psr\Container\ContainerInterface;
use ReflectionClass;
use ReflectionException;
use ReflectionFunction;
use ReflectionFunctionAbstract;
use ReflectionMethod;
use think\exception\ClassNotFoundException;
use think\exception\FuncNotFoundException;
use think\helper\Str;
/**
* 容器管理类 支持PSR-11
*/
class Container implements ContainerInterface, ArrayAccess, IteratorAggregate, Countable
{
/**
* 容器对象实例
* @var Container|Closure
*/
protected static $instance;
/**
* 容器中的对象实例
* @var array
*/
protected $instances = [];
/**
* 容器绑定标识
* @var array
*/
protected $bind = [];
/**
* 容器回调
* @var array
*/
protected $invokeCallback = [];
/**
* 获取当前容器的实例（单例）
* @access public
* @return static
*/
public static function getInstance()
{
if (is_null(static::$instance)) {
static::$instance = new static;
}
if (static::$instance instanceof Closure) {
return (static::$instance)();
}
return static::$instance;
}
/**
* 设置当前容器的实例
* @access public
* @param object|Closure $instance
* @return void
*/
public static function setInstance($instance): void
{
static::$instance = $instance;
}
/**
* 注册一个容器对象回调
*
* @param string|Closure $abstract
* @param Closure|null $callback
* @return void
*/
public function resolving($abstract, Closure $callback = null): void
{
if ($abstract instanceof Closure) {
$this->invokeCallback['*'][] = $abstract;
return;
}
$abstract = $this->getAlias($abstract);
$this->invokeCallback[$abstract][] = $callback;
}
/**
* 获取容器中的对象实例 不存在则创建
* @access public
* @param string $abstract 类名或者标识
* @param array|true $vars 变量
* @param bool $newInstance 是否每次创建新的实例
* @return object
*/
public static function pull(string $abstract, array $vars = [], bool $newInstance = false)
{
return static::getInstance()->make($abstract, $vars, $newInstance);
}
/**
* 获取容器中的对象实例
* @access public
* @param string $abstract 类名或者标识
* @return object
*/
public function get($abstract)
{
if ($this->has($abstract)) {
return $this->make($abstract);
}
throw new ClassNotFoundException('class not exists: ' . $abstract, $abstract);
}
/**
* 绑定一个类、闭包、实例、接口实现到容器
* @access public
* @param string|array $abstract 类标识、接口
* @param mixed $concrete 要绑定的类、闭包或者实例
* @return $this
*/
public function bind($abstract, $concrete = null)
{
if (is_array($abstract)) {
foreach ($abstract as $key => $val) {
$this->bind($key, $val);
}
} elseif ($concrete instanceof Closure) {
$this->bind[$abstract] = $concrete;
} elseif (is_object($concrete)) {
$this->instance($abstract, $concrete);
} else {
$abstract = $this->getAlias($abstract);
if ($abstract != $concrete) {
$this->bind[$abstract] = $concrete;
}
}
return $this;
}
/**
* 根据别名获取真实类名
* @param string $abstract
* @return string
*/
public function getAlias(string $abstract): string
{
if (isset($this->bind[$abstract])) {
$bind = $this->bind[$abstract];
if (is_string($bind)) {
return $this->getAlias($bind);
}
}
return $abstract;
}
/**
* 绑定一个类实例到容器
* @access public
* @param string $abstract 类名或者标识
* @param object $instance 类的实例
* @return $this
*/
public function instance(string $abstract, $instance)
{
$abstract = $this->getAlias($abstract);
$this->instances[$abstract] = $instance;
return $this;
}
/**
* 判断容器中是否存在类及标识
* @access public
* @param string $abstract 类名或者标识
* @return bool
*/
public function bound(string $abstract): bool
{
return isset($this->bind[$abstract]) || isset($this->instances[$abstract]);
}
/**
* 判断容器中是否存在类及标识
* @access public
* @param string $name 类名或者标识
* @return bool
*/
public function has($name): bool
{
return $this->bound($name);
}
/**
* 判断容器中是否存在对象实例
* @access public
* @param string $abstract 类名或者标识
* @return bool
*/
public function exists(string $abstract): bool
{
$abstract = $this->getAlias($abstract);
return isset($this->instances[$abstract]);
}
/**
* 创建类的实例 已经存在则直接获取
* @access public
* @param string $abstract 类名或者标识
* @param array $vars 变量
* @param bool $newInstance 是否每次创建新的实例
* @return mixed
*/
public function make(string $abstract, array $vars = [], bool $newInstance = false)
{
$abstract = $this->getAlias($abstract);
if (isset($this->instances[$abstract]) && !$newInstance) {
return $this->instances[$abstract];
}
if (isset($this->bind[$abstract]) && $this->bind[$abstract] instanceof Closure) {
$object = $this->invokeFunction($this->bind[$abstract], $vars);
} else {
$object = $this->invokeClass($abstract, $vars);
}
if (!$newInstance) {
$this->instances[$abstract] = $object;
}
return $object;
}
/**
* 删除容器中的对象实例
* @access public
* @param string $name 类名或者标识
* @return void
*/
public function delete($name)
{
$name = $this->getAlias($name);
if (isset($this->instances[$name])) {
unset($this->instances[$name]);
}
}
/**
* 执行函数或者闭包方法 支持参数调用
* @access public
* @param string|Closure $function 函数或者闭包
* @param array $vars 参数
* @return mixed
*/
public function invokeFunction($function, array $vars = [])
{
try {
$reflect = new ReflectionFunction($function);
} catch (ReflectionException $e) {
throw new FuncNotFoundException("function not exists: {$function}()", $function, $e);
}
$args = $this->bindParams($reflect, $vars);
return $function(...$args);
}
/**
* 调用反射执行类的方法 支持参数绑定
* @access public
* @param mixed $method 方法
* @param array $vars 参数
* @param bool $accessible 设置是否可访问
* @return mixed
*/
public function invokeMethod($method, array $vars = [], bool $accessible = false)
{
if (is_array($method)) {
[$class, $method] = $method;
$class = is_object($class) ? $class : $this->invokeClass($class);
} else {
// 静态方法
[$class, $method] = explode('::', $method);
}
try {
$reflect = new ReflectionMethod($class, $method);
} catch (ReflectionException $e) {
$class = is_object($class) ? get_class($class) : $class;
throw new FuncNotFoundException('method not exists: ' . $class . '::' . $method . '()', "{$class}::{$method}", $e);
}
$args = $this->bindParams($reflect, $vars);
if ($accessible) {
$reflect->setAccessible($accessible);
}
return $reflect->invokeArgs(is_object($class) ? $class : null, $args);
}
/**
* 调用反射执行类的方法 支持参数绑定
* @access public
* @param object $instance 对象实例
* @param mixed $reflect 反射类
* @param array $vars 参数
* @return mixed
*/
public function invokeReflectMethod($instance, $reflect, array $vars = [])
{
$args = $this->bindParams($reflect, $vars);
return $reflect->invokeArgs($instance, $args);
}
/**
* 调用反射执行callable 支持参数绑定
* @access public
* @param mixed $callable
* @param array $vars 参数
* @param bool $accessible 设置是否可访问
* @return mixed
*/
public function invoke($callable, array $vars = [], bool $accessible = false)
{
if ($callable instanceof Closure) {
return $this->invokeFunction($callable, $vars);
} elseif (is_string($callable) && false === strpos($callable, '::')) {
return $this->invokeFunction($callable, $vars);
} else {
return $this->invokeMethod($callable, $vars, $accessible);
}
}
/**
* 调用反射执行类的实例化 支持依赖注入
* @access public
* @param string $class 类名
* @param array $vars 参数
* @return mixed
*/
public function invokeClass(string $class, array $vars = [])
{
try {
$reflect = new ReflectionClass($class);
} catch (ReflectionException $e) {
throw new ClassNotFoundException('class not exists: ' . $class, $class, $e);
}
if ($reflect->hasMethod('__make')) {
$method = $reflect->getMethod('__make');
if ($method->isPublic() && $method->isStatic()) {
$args = $this->bindParams($method, $vars);
$object = $method->invokeArgs(null, $args);
$this->invokeAfter($class, $object);
return $object;
}
}
$constructor = $reflect->getConstructor();
$args = $constructor ? $this->bindParams($constructor, $vars) : [];
$object = $reflect->newInstanceArgs($args);
$this->invokeAfter($class, $object);
return $object;
}
/**
* 执行invokeClass回调
* @access protected
* @param string $class 对象类名
* @param object $object 容器对象实例
* @return void
*/
protected function invokeAfter(string $class, $object): void
{
if (isset($this->invokeCallback['*'])) {
foreach ($this->invokeCallback['*'] as $callback) {
$callback($object, $this);
}
}
if (isset($this->invokeCallback[$class])) {
foreach ($this->invokeCallback[$class] as $callback) {
$callback($object, $this);
}
}
}
/**
* 绑定参数
* @access protected
* @param ReflectionFunctionAbstract $reflect 反射类
* @param array $vars 参数
* @return array
*/
protected function bindParams(ReflectionFunctionAbstract $reflect, array $vars = []): array
{
if ($reflect->getNumberOfParameters() == 0) {
return [];
}
// 判断数组类型 数字数组时按顺序绑定参数
reset($vars);
$type = key($vars) === 0 ? 1 : 0;
$params = $reflect->getParameters();
$args = [];
foreach ($params as $param) {
$name = $param->getName();
$lowerName = Str::snake($name);
$reflectionType = $param->getType();
if ($reflectionType && $reflectionType->isBuiltin() === false) {
$args[] = $this->getObjectParam($reflectionType->getName(), $vars);
} elseif (1 == $type && !empty($vars)) {
$args[] = array_shift($vars);
} elseif (0 == $type && array_key_exists($name, $vars)) {
$args[] = $vars[$name];
} elseif (0 == $type && array_key_exists($lowerName, $vars)) {
$args[] = $vars[$lowerName];
} elseif ($param->isDefaultValueAvailable()) {
$args[] = $param->getDefaultValue();
} else {
throw new InvalidArgumentException('method param miss:' . $name);
}
}
return $args;
}
/**
* 创建工厂对象实例
* @param string $name 工厂类名
* @param string $namespace 默认命名空间
* @param array $args
* @return mixed
* @deprecated
* @access public
*/
public static function factory(string $name, string $namespace = '', ...$args)
{
$class = false !== strpos($name, '\\') ? $name : $namespace . ucwords($name);
return Container::getInstance()->invokeClass($class, $args);
}
/**
* 获取对象类型的参数值
* @access protected
* @param string $className 类名
* @param array $vars 参数
* @return mixed
*/
protected function getObjectParam(string $className, array &$vars)
{
$array = $vars;
$value = array_shift($array);
if ($value instanceof $className) {
$result = $value;
array_shift($vars);
} else {
$result = $this->make($className);
}
return $result;
}
public function __set($name, $value)
{
$this->bind($name, $value);
}
public function __get($name)
{
return $this->get($name);
}
public function __isset($name): bool
{
return $this->exists($name);
}
public function __unset($name)
{
$this->delete($name);
}
public function offsetExists($key)
{
return $this->exists($key);
}
public function offsetGet($key)
{
return $this->make($key);
}
public function offsetSet($key, $value)
{
$this->bind($key, $value);
}
public function offsetUnset($key)
{
$this->delete($key);
}
//Countable
public function count()
{
return count($this->instances);
}
//IteratorAggregate
public function getIterator()
{
return new ArrayIterator($this->instances);
}
}