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<?php |
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namespace graychen\container; |
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/** |
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* @brief 服务容器 |
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* author 陈家辉 |
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*/ |
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class Container implements \ArrayAccess |
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{ |
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private $_bindings = [];//服务列表 |
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private $_instances= [];//已经实例化的服务 |
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//获取服务 |
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public function get($name, $params=[]) |
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{ |
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//先从实例化的列表中查找 |
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if (isset($this->_instances[$name])) { |
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return $this->_instances[$name]; |
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} |
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//检测有没有注册该服务 |
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if (!isset($this->_bindings[$name])) { |
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return null; |
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} |
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$concrete = $this->_bindings[$name]['class'];//对象具体注册内容 |
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$obj = null; |
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if ($concrete instanceof \Closure) { //匿名函数方式 |
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$obj = call_user_func_array($concrete, $params); |
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} elseif (is_string($concrete)) { //字符串方式 |
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if (empty($params)) { |
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$obj = new $concrete; |
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} else { |
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//带参数的类实例化,使用反射 |
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$class = new \reflectionClass($concrete); |
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$obj = $class->newInstanceArgs($params); |
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} |
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} |
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//如果是共享服务，则写入_instances列表，下次直接取回 |
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if ($this->_bindings[$name]['shared']==true && $obj) { |
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$this->_instances[$name]=$obj; |
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} |
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return $obj; |
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} |
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//检测是否已经绑定 |
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public function has($name) |
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{ |
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return isset($this->_bindings[$name]) or isset($this->_instances[$name]); |
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} |
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//卸载服务 |
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public function remove($name) |
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{ |
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unset($this->_bindings[$name],$this->_instances[$name]); |
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} |
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//设置服务 |
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public function set($name, $class) |
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{ |
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$this->_registerService($name, $class); |
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} |
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//设置共享服务 |
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public function setShared($name, $class) |
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{ |
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$this->_registerService($name, $class, true); |
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} |
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//注册服务 |
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private function _registerService($name, $class, $shared=false) |
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{ |
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$this->remove($name); |
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if (!($class instanceof \Closure) && is_object($class)) { |
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$this->_instances[$name]=$class; |
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} else { |
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$this->_bindings[$name]=array("class"=>$class,"shared"=>$shared); |
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} |
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} |
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//ArrayAccess接口，检测服务是否存在 |
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public function offsetExists($offset) |
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{ |
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return $this->has($offset); |
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} |
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//ArrayAccess接口,以$di[$name]方式获取服务 |
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public function offsetGet($offset) |
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{ |
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return $this->get($offset); |
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} |
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//ArrayAccess接口,以$di[$name]方式获取服务 |
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public function offsetSet($offset, $value) |
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{ |
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return $this->set($offset, $value); |
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} |
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//卸载服务 |
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public function offsetUnset($offset) |
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{ |
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return $this->remove($offset); |
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} |
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} |
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Graychen /
Container
