graychen\container\Container

Complexity

Total Complexity

20

Size/Duplication

Total Lines	99
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	0

Test Coverage

Coverage

100%

Importance

Changes

0

10 Methods

Rating	Name	Duplication	Size	Complexity
A	has()	0	4	2
A	remove()	0	4	1
A	set()	0	4	1
A	setShared()	0	4	1
A	offsetExists()	0	4	1
A	offsetGet()	0	4	1
A	offsetSet()	0	4	1
A	offsetUnset()	0	4	1
C	get()	0	33	8
A	_registerService()	0	9	3

<?php
namespace graychen\container;

/**
* @brief 服务容器
* author 陈家辉
 */
class Container implements \ArrayAccess
{
    private $_bindings = [];//服务列表
    private $_instances= [];//已经实例化的服务

    //获取服务
    public function get($name, $params=[])
    {
        //先从实例化的列表中查找
        if (isset($this->_instances[$name])) {
            return $this->_instances[$name];
        }

        //检测有没有注册该服务
        if (!isset($this->_bindings[$name])) {
            return null;
        }

        $concrete = $this->_bindings[$name]['class'];//对象具体注册内容

        $obj = null;

        if ($concrete instanceof \Closure) { //匿名函数方式
            $obj = call_user_func_array($concrete, $params);
        } elseif (is_string($concrete)) {     //字符串方式
            if (empty($params)) {
                $obj = new $concrete;
            } else {
                //带参数的类实例化,使用反射
                $class = new \reflectionClass($concrete);
                $obj = $class->newInstanceArgs($params);
            }
        }
        //如果是共享服务，则写入_instances列表，下次直接取回
        if ($this->_bindings[$name]['shared']==true && $obj) {
            $this->_instances[$name]=$obj;
        }
        return $obj;
    }

    //检测是否已经绑定
    public function has($name)
    {
        return isset($this->_bindings[$name]) or isset($this->_instances[$name]);
    }

    //卸载服务
    public function remove($name)
    {
        unset($this->_bindings[$name],$this->_instances[$name]);
    }

    //设置服务
    public function set($name, $class)
    {
        $this->_registerService($name, $class);
    }

    //设置共享服务
    public function setShared($name, $class)
    {
        $this->_registerService($name, $class, true);
    }

    //注册服务
    private function _registerService($name, $class, $shared=false)
    {
        $this->remove($name);
        if (!($class instanceof \Closure) && is_object($class)) {
            $this->_instances[$name]=$class;
        } else {
            $this->_bindings[$name]=array("class"=>$class,"shared"=>$shared);
        }
    }

    //ArrayAccess接口，检测服务是否存在
    public function offsetExists($offset)
    {
        return $this->has($offset);
    }

    //ArrayAccess接口,以$di[$name]方式获取服务
    public function offsetGet($offset)
    {
        return $this->get($offset);
    }

    //ArrayAccess接口,以$di[$name]方式获取服务
    public function offsetSet($offset, $value)
    {
        return $this->set($offset, $value);
    }

    //卸载服务
    public function offsetUnset($offset)
    {
        return $this->remove($offset);
    }
}