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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/

namespace Zend\Di\Definition;

use Zend\Di\Definition\Builder\InjectionMethod;
use Zend\Di\Di;

/**
* Class definitions for a single class
*/
class ClassDefinition implements DefinitionInterface, PartialMarker
{
    /**
* @var null|string
*/
    protected $class = null;

    /**
* @var string[]
*/
    protected $supertypes = array();

    /**
* @var null|\Callable|array|string
*/
    protected $instantiator = null;

    /**
* @var bool[]
*/
    protected $methods = array();

    /**
* @var array
*/
    protected $methodParameters = array();

    /**
* @param string $class
*/
    public function __construct($class)
    {
        $this->class = $class;
    }

    /**
* @param null|\Callable|array|string $instantiator
* @return self
*/
    public function setInstantiator($instantiator)
    {
        $this->instantiator = $instantiator;

        return $this;
    }

    /**
* @param string[] $supertypes
* @return self
*/
    public function setSupertypes(array $supertypes)
    {
        $this->supertypes = $supertypes;

        return $this;
    }

    /**
* @param string $method
* @param mixed|bool|null $isRequired
* @return self
*/
    public function addMethod($method, $isRequired = null)
    {
       if ($isRequired === null) {
            if ($method === '__construct') {
                $methodRequirementType = Di::METHOD_IS_CONSTRUCTOR;
            } else {
                $methodRequirementType = Di::METHOD_IS_OPTIONAL;
            }
        } else {
            $methodRequirementType = InjectionMethod::detectMethodRequirement($isRequired);
        }

        $this->methods[$method] = $methodRequirementType;

        return $this;
    }

    /**
* @param $method
* @param $parameterName
* @param array $parameterInfo (keys: required, type)
* @return ClassDefinition
*/
    public function addMethodParameter($method, $parameterName, array $parameterInfo)
    {
        if (!array_key_exists($method, $this->methods)) {
            if ($method === '__construct') {
                $this->methods[$method] = Di::METHOD_IS_CONSTRUCTOR;
            } else {
                $this->methods[$method] = Di::METHOD_IS_OPTIONAL;
            }
        }

        if (!array_key_exists($method, $this->methodParameters)) {
            $this->methodParameters[$method] = array();
        }

        $type = (isset($parameterInfo['type'])) ? $parameterInfo['type'] : null;
        $required = (isset($parameterInfo['required'])) ? (bool) $parameterInfo['required'] : false;
        $default = (isset($parameterInfo['default'])) ? $parameterInfo['default'] : null;

        $fqName = $this->class . '::' . $method . ':' . $parameterName;
        $this->methodParameters[$method][$fqName] = array(
            $parameterName,
            $type,
            $required,
            $default
        );

        return $this;
    }

    /**
* {@inheritDoc}
*/
    public function getClasses()
    {
        return array($this->class);
    }

    /**
* {@inheritDoc}
*/
    public function hasClass($class)
    {
        return ($class === $this->class);
    }

    /**
* {@inheritDoc}
*/
    public function getClassSupertypes($class)
    {
        if ($this->class !== $class) {
            return array();
        }
        return $this->supertypes;
    }

    /**
* {@inheritDoc}
*/
    public function getInstantiator($class)
    {
        if ($this->class !== $class) {
            return null;
        }
        return $this->instantiator;
    }

    /**
* {@inheritDoc}
*/
    public function hasMethods($class)
    {
        return (count($this->methods) > 0);
    }

    /**
* {@inheritDoc}
*/
    public function getMethods($class)
    {
        if ($this->class !== $class) {
            return array();
        }
        return $this->methods;
    }

    /**
* {@inheritDoc}
*/
    public function hasMethod($class, $method)
    {
        if ($this->class !== $class) {
            return null;
        }

        if (is_array($this->methods)) {
            return array_key_exists($method, $this->methods);
        }

        return null;
    }

    /**
* {@inheritDoc}
*/
    public function hasMethodParameters($class, $method)
    {
        if ($this->class !== $class) {
            return false;
        }
        return (array_key_exists($method, $this->methodParameters));
    }

    /**
* {@inheritDoc}
*/
    public function getMethodParameters($class, $method)
    {
        if ($this->class !== $class) {
            return null;
        }

        if (array_key_exists($method, $this->methodParameters)) {
            return $this->methodParameters[$method];
        }

        return null;
    }
}
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