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<?php
/**
 * @version   $Id: Annotation.php 30067 2016-03-08 13:44:25Z matias $
 * @author    RocketTheme http://www.rockettheme.com
 * @copyright Copyright (C) 2007 - 2020 RocketTheme, LLC
 * @license   http://www.gnu.org/licenses/gpl-2.0.html GNU/GPLv2 only
 */
defined('ROKCOMMON') or die;
/**
 * RokCommon_Annotation_Addendum PHP Reflection Annotations
 * http://code.google.com/p/addendum/
 *
 * Copyright (C) 2006-2009 Jan "johno Suchal <johno@jsmf.net>
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 **/

class RokCommon_Annotation
{
    /**
     * @var
     */
    public $value;
    /**
     * @var array
     */
    private static $creationStack = array();

    /**
     * @param array $data
     * @param bool  $target
     */
    public final function __construct($data = array(), $target = false)
    {
        $reflection = new ReflectionClass($this);
        $class      = $reflection->getName();
        if (isset(self::$creationStack[$class])) {
            trigger_error("Circular annotation reference on '$class'", E_USER_ERROR);
            return;
        }
        self::$creationStack[$class] = true;
        foreach ($data as $key => $value) {
            if ($reflection->hasProperty($key)) {
                $this->{$key} = $value;
            } else {
                trigger_error("Property '$key' not defined for annotation '$class'");
            }
        }
        $this->checkTargetConstraints($target);
        $this->checkConstraints($target);
        unset(self::$creationStack[$class]);
    }

    /**
     * @param $target
     *
     * @return mixed
     */
    private function checkTargetConstraints($target)
    {
        $reflection = new RokCommon_Annotation_ReflectionClass($this);
        if ($reflection->hasAnnotation('Target')) {
            $value  = $reflection->getAnnotation('Target')->value;
            $values = is_array($value) ? $value : array($value);
            foreach ($values as $value) {
                if ($value == 'class' && $target instanceof ReflectionClass) return;
                if ($value == 'method' && $target instanceof ReflectionMethod) return;
                if ($value == 'property' && $target instanceof ReflectionProperty) return;
                if ($value == 'nested' && $target === false) return;
            }
            if ($target === false) {
                trigger_error("RokCommon_Annotation '" . get_class($this) . "' nesting not allowed", E_USER_ERROR);
            } else {
                trigger_error("RokCommon_Annotation '" . get_class($this) . "' not allowed on " . $this->createName($target), E_USER_ERROR);
            }
        }
    }

    /**
     * @param $target
     *
     * @return string
     */
    private function createName($target)
    {
        if ($target instanceof ReflectionMethod) {
            return $target->getDeclaringClass()->getName() . '::' . $target->getName();
        } elseif ($target instanceof ReflectionProperty) {
            return $target->getDeclaringClass()->getName() . '::$' . $target->getName();
        } else {
            return $target->getName();
        }
    }

    /**
     * @param $target
     */
    protected function checkConstraints($target)
    {
    }
}

/**
 *
 */
class RokCommon_Annotation_Target extends RokCommon_Annotation
{
}