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<?php
/**
 * @see       https://github.com/zendframework/zend-server for the canonical source repository
 * @copyright Copyright (c) 2005-2018 Zend Technologies USA Inc. (https://www.zend.com)
 * @license   https://github.com/zendframework/zend-server/blob/master/LICENSE.md New BSD License
 */

namespace Zend\Server;

use Zend\Server\Reflection\ReflectionClass;
use Zend\Server\Reflection\ReflectionFunction;

/**
 * Reflection for determining method signatures to use with server classes
 */
class Reflection
{
    /**
     * Perform class reflection to create dispatch signatures
     *
     * Creates a {@link \Zend\Server\Reflection\ClassReflection} object for the class or
     * object provided.
     *
     * If extra arguments should be passed to dispatchable methods, these may
     * be provided as an array to $argv.
     *
     * @param string|object $class Class name or object
     * @param  bool|array $argv Optional arguments to be used during the method call
     * @param string $namespace Optional namespace with which to prefix the
     * method name (used for the signature key). Primarily to avoid collisions,
     * also for XmlRpc namespacing
     * @return \Zend\Server\Reflection\ReflectionClass
     * @throws \Zend\Server\Reflection\Exception\InvalidArgumentException
     */
    public static function reflectClass($class, $argv = false, $namespace = '')
    {
        if (is_object($class)) {
            $reflection = new \ReflectionObject($class);
        } elseif (is_string($class) && class_exists($class)) {
            $reflection = new \ReflectionClass($class);
        } else {
            throw new Reflection\Exception\InvalidArgumentException('Invalid class or object passed to attachClass()');
        }

        if ($argv && ! is_array($argv)) {
            throw new Reflection\Exception\InvalidArgumentException('Invalid argv argument passed to reflectClass');
        }

        return new ReflectionClass($reflection, $namespace, $argv);
    }

    /**
     * Perform function reflection to create dispatch signatures
     *
     * Creates dispatch prototypes for a function. It returns a
     * {@link Zend\Server\Reflection\FunctionReflection} object.
     *
     * If extra arguments should be passed to the dispatchable function, these
     * may be provided as an array to $argv.
     *
     * @param string $function Function name
     * @param  bool|array $argv Optional arguments to be used during the method call
     * @param string $namespace Optional namespace with which to prefix the
     * function name (used for the signature key). Primarily to avoid
     * collisions, also for XmlRpc namespacing
     * @return \Zend\Server\Reflection\ReflectionFunction
     * @throws \Zend\Server\Reflection\Exception\InvalidArgumentException
     */
    public static function reflectFunction($function, $argv = false, $namespace = '')
    {
        if (! is_string($function) || ! function_exists($function)) {
            throw new Reflection\Exception\InvalidArgumentException(sprintf(
                'Invalid function "%s" passed to reflectFunction',
                $function
            ));
        }

        if ($argv && ! is_array($argv)) {
            throw new Reflection\Exception\InvalidArgumentException('Invalid argv argument passed to reflectFunction');
        }

        return new ReflectionFunction(new \ReflectionFunction($function), $namespace, $argv);
    }
}