ObjectConverter, czyli wyniki metod do tablicy. Opcje

[q3trm]

Witam,

ostatnio dawno nie kodowałem w PHP właściwie większość czasu poświęcam JavaScript, dlatego postanowiłem napisać klasę(ObjectConverter) w celu poznania bliżej refleksji i odświeżenia umiejętności. Klasa ma na celu pobieranie wyników metod klasy podanej konwersji, metody są pobierane na podstawie członu nazwy np: wszystkie publiczne metody zaczynające się na "get" zostaną użyte do konwersji, po czym wynik zostanie zapisany do tablicy i zwrócony. Metody podczas konwersji mogą otrzymywać zewnętrznie parametry.

[PHP] pobierz, plaintext 
<?php
 
 
class ObjectConverter {
 
     protected $object;
 
     protected $params;
 
     protected $notConvert;
 
     protected $member = 'get';
 
     protected $methods = array();
 
     protected $methodsName = array();
 
     protected $quantityParams = array();
 
     private static $exceptionMessage = array(
         'object' => '%s is not an object',
         'array' => '%s must be an array',
         'not-param' => '%s expected parameter',
         'not-exists' => 'public methods %s not exists',
         'bad-quantity-param' => '%s bad quantity parameter in $params',
         'too-many-param' => 'your method have too many parameter - allowed 5'
     );
 
     public function convert($object, $params = array(), $not_convert = array()) {
 
          if (!is_object($object)) {
               $this->exception('object', '$object');
          }
          if (!is_array($params)) {
               $this->exception('array', '$params');
          }
          if (!is_array($not_convert)) {
               $this->exception('array', '$not_convert');
          }
          $this->setObject($object);
          $this->setParams($params);
          $this->setNotConvert($not_convert);
 
          return $this->prepareDataObject();
     }
 
     protected function setObject($obj) {
          $this->object = $obj;
     }
 
     protected function setParams($params) {
          $this->params = $params;
     }
 
     protected function setNotConvert($not_convert) {
          $this->notConvert = array_flip($not_convert);
     }
 
     protected function prepareDataObject() {
 
          $methods = $this->reflectionClass()->getMethods();
 
          for ($i = 0; $i < count($methods); $i++) {
 
               if ($methods[$i]->isPublic() 
                   && $this->isMember($methods[$i]->name) 
                   && $this->isConvertMethod($methods[$i]->name)) 
               {
                    $this->methods[] = $methods[$i];
                    $this->methodsName[] = $methods[$i]->name;
                    $this->quantityParams[] = $methods[$i]->getNumberOfRequiredParameters();
               }
          }
 
          return count($this->methodsName) > 0 ? $this : $this->exception('not-exists', $this->member);
     }
 
     public function toArray() {
 
          for ($i = 0; $i < count($this->methodsName); $i++) {
 
               if (0 < $this->quantityParams[$i]) {
 
                    $result[$this->createIndex($i)] = $this->withParams($i);
               } else {
                    $result[$this->createIndex($i)] = $this->withoutParams($i);
               }
          }
 
          return $result;
     }
 
     protected function withParams($i) {
 
          $method_name = $this->methodsName[$i];
 
 
          if (!isset($this->params[$method_name])) {
               $this->exception('not-param', $method_name);
          }
 
          $params = $this->params[$method_name];
 
          if ($this->quantityParams[$i] == count($this->params[$method_name])) {
 
               switch ($this->quantityParams[$i]) {
                    case 1 : return $this->object->$method_name($params[0]);
                         break;
                    case 2 : return $this->object->$method_name($params[0], $params[1]);
                         break;
                    case 3 : return $this->object->$method_name($params[0], $params[1], $params[2]);
                         break;
                    case 4 : return $this->object->$method_name($params[0], $params[1], $params[2], $params[3]);
                         break;
                    case 5 : return $this->object->$method_name($params[0], $params[1], $params[2], $params[3], $params[4]);
                         break;
                    default : $this->exception('too-many-param', $method_name);
               }
          } else {
               $this->exception('bad-quantity-param');
          }
     }
 
     protected function reflectionClass() {
          return new \ReflectionClass($this->object);
     }
 
     protected function withoutParams($i) {
 
          $method_name = $this->methodsName[$i];
 
          return $this->object->$method_name();
     }
 
     protected function createIndex($i) {
 
          return strtolower(preg_replace('![a-z]\K(?=[A-Z])!', '_', substr($this->methodsName[$i], strlen($this->member))));
     }
 
     protected function isConvertMethod($method) {
 
          return !isset($this->notConvert[$method]);
     }
 
     protected function isMember($method) {
 
          return $this->member == substr($method, 0, strlen($this->member));
     }
 
     public function setMemberNameMethods($member) {
 
          $this->member = $member;
          return $this;
     }
 
     protected function exception($index, $var_name = null) {
 
          throw new Exception(sprintf(self::$exceptionMessage[$index], $var_name));
     }
 
}	
?>
[PHP] pobierz, plaintext 

Poniżej zamieszczam dwa przykłady działania nie tłumacze dokładnie całego procesu zachodzącego w klasie, ponieważ zależy mi na waszej ocenie czytelności/przejrzystości kodu. Kod jest kompletny można go odpalić.

[PHP] pobierz, plaintext 
 
class Example {
 
protected $enlargement = 'txt';
protected $file = 'log';
 
public function getEnlargement() {
return $this->enlargement[0] !== '.' ? '.' . $this->enlargement : $this->enlargement;
}
 
public function getFileName() {
return $this->file;
}
 
public function getLengthFileName() {
return strlen($this->file);
}
 
}
$c = new ObjectConverter();
$example = new Example();
 
try {
 
$result = $c->convert($example)
->toArray();
 
} catch (Exception $e) {
 
echo $e->getMessage();
}
echo '<pre>';
print_r($result);
echo '<pre>';
/*
Array
(
  [enlargement] => .txt
  [file_name] => log
  [length_file_name] => 3
)
*/
class Example2 {
 
public function calculateAvg($a, $b) {
return @($a / $b);
}
 
public function calculateSum($a, $b) {
return @($a * $b);
}
 
public function calculateDiff($a, $b) {
return $a - $b;
}
 
public function calculatePi($a) {
return 3.14 * $a;
}
 
}
$c = new ObjectConverter();
$example2 = new Example2();
$params = array(
'calculateAvg' => array(5, 25),
'calculateSum' => array(5, 55),
'calculateDiff' => array(20, 5),
);
$notConvert = array('calculatePi');
 
try {
 
$result = $c->setMemberNameMethods('calculate')
->convert($example2, $params, $notConvert)
->toArray();
 
} catch (Exception $e) {
 
echo $e->getMessage();
}
echo '<pre>';
print_r($result);
echo '<pre>';
/*
Array
(
  [avg] => 0.2
  [sum] => 275
  [diff] => 15
)
*/
 
[PHP] pobierz, plaintext 

Ten post edytował q3trm 10.12.2013, 23:39:03