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<?php |
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/** |
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* Fwk |
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* |
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* Copyright (c) 2011-2012, Julien Ballestracci <[email protected]>. |
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* All rights reserved. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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* PHP Version 5.3 |
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* |
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* @category Core |
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* @package Fwk\Core |
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* @author Julien Ballestracci <[email protected]> |
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* @copyright 2011-2012 Julien Ballestracci <[email protected]> |
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* @license http://www.opensource.org/licenses/bsd-license.php BSD License |
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* @link http://www.fwk.pw |
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*/ |
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namespace Fwk\Core; |
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/** |
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* This class is a simple accessor for values of objects |
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* |
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* If getters/setters are found, we use them first. |
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* If not, we try to directly get/set the value (\ArrayAccess or \stdClass) |
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* |
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* @category Utilities |
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* @package Fwk\Core |
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* @author Julien Ballestracci <[email protected]> |
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* @license http://www.opensource.org/licenses/bsd-license.php BSD License |
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* @link http://www.phpfwk.com |
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*/ |
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class Accessor |
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{ |
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/** |
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* The object to access |
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* |
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* @var mixed |
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*/ |
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protected $object; |
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/** |
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* Reflector for the object |
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* |
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* @var \ReflectionObject |
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*/ |
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protected $reflector; |
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/** |
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* Override properties visibility ? |
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* |
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* @var boolean |
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*/ |
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protected $force = false; |
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/** |
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* Constructor |
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* |
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* @param mixed $object The object we want to access |
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* |
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* @throws \InvalidArgumentException if $object is not an object |
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* @return void |
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*/ |
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public function __construct($object) |
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{ |
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if (!is_object($object)) { |
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throw new \InvalidArgumentException("Argument is not an object"); |
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} |
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$this->object = $object; |
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} |
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/** |
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* Try to retrieve a value from the object |
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* |
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* @param string $key Propertie's name |
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* |
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* @return mixed Actual value if reached or false |
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*/ |
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public function get($key) |
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{ |
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$obj = $this->object; |
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$getter = "get". ucfirst($key); |
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if (\method_exists($obj, $getter) && \is_callable(array($obj, $getter))) { |
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return $obj->{$getter}(); |
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} elseif ($obj instanceof \stdClass && isset($obj->{$key})) { |
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return $obj->{$key}; |
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} elseif ($obj instanceof \ArrayAccess && $obj->offsetExists($key)) { |
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return $obj->offsetGet($key); |
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} else { |
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$this->getReflector(); |
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try { |
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$props = $this->getClassProperties($this->reflector->getName()); |
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if (!isset($props[$key])) { |
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return false; |
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} |
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$prop = $props[$key]; |
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if (($prop->isPrivate() || $prop->isProtected()) && $this->force) { |
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$prop->setAccessible(true); |
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} |
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return $prop->getValue($obj); |
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} catch (\ReflectionException $e) { |
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} |
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} |
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return false; |
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} |
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/** |
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* Try to set a value |
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* |
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* @param string $key Propertie's name |
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* @param mixed $value Desired value |
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* |
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* @return boolean true if successful |
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*/ |
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public function set($key, $value) |
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{ |
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$obj = $this->object; |
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$setter = "set". ucfirst($key); |
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if (\method_exists($obj, $setter) && \is_callable(array($obj, $setter))) { |
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$obj->{$setter}($value); |
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return true; |
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} |
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if ($obj instanceof \stdClass) { |
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$obj->{$key} = $value; |
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return true; |
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} |
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if ($obj instanceof \ArrayAccess) { |
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$obj->offsetSet($key, $value); |
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return true; |
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} |
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$reflector = $this->getReflector(); |
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try { |
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$prop = $reflector->getProperty($key); |
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if (($prop->isPrivate() || $prop->isProtected()) && $this->force) { |
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$prop->setAccessible(true); |
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} |
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if ($prop->isPublic() || $this->force === true) { |
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$prop->setValue($obj, $value); |
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return true; |
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} |
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} catch (\ReflectionException $e) { |
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} |
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return false; |
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} |
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/** |
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* Set multiple values at once |
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* |
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* @param array $values Array of keys->values to be set |
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* |
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* @return void |
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*/ |
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public function setValues(array $values) |
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{ |
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foreach ($values as $key => $value) { |
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$this->set($key, $value); |
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} |
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} |
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/** |
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* Gets a reflector for the object |
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* |
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* @return \ReflectionObject |
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*/ |
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public function getReflector() |
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{ |
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if (!isset($this->reflector)) { |
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$this->reflector = new \ReflectionObject($this->object); |
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} |
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return $this->reflector; |
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} |
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/** |
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* Make an array of keys->values (eventually filtered by $modifier) from |
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* object's properties. |
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* |
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* @param mixed $modifier Filtering callable |
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* |
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* @return array The resulting array |
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*/ |
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public function toArray($modifier = null) |
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{ |
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$this->getReflector(); |
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$final = array(); |
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$props = $this->getClassProperties($this->reflector->getName()); |
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foreach ($props as $property) { |
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$value = $this->get($property->getName()); |
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if (\is_callable($modifier)) { |
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$value = \call_user_func_array($modifier, array($value)); |
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} |
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$final[$property->getName()] = $value; |
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} |
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return $final; |
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} |
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/** |
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* Recursive function to get an associative array of class properties by |
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* property name => ReflectionProperty() object including inherited ones |
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* from extended classes. |
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* |
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* @param string $className Class name |
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* @param integer $filter ReflectionProperty filter |
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* |
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* @author muratyaman at gmail dot com |
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* @return array |
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*/ |
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protected function getClassProperties($className, $filter = null) |
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{ |
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$ref = new \ReflectionClass($className); |
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if (null === $filter) { |
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$filter = \ReflectionProperty::IS_PUBLIC |
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| \ReflectionProperty::IS_PRIVATE |
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| \ReflectionProperty::IS_PROTECTED |
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| \ReflectionProperty::IS_STATIC; |
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} |
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$props = $ref->getProperties($filter); |
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$props_arr = array(); |
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$parentClass = $ref->getParentClass(); |
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foreach ($props as $prop) { |
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$f = $prop->getName(); |
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$props_arr[$f] = $prop; |
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} |
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if ($parentClass) { |
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$props_arr = array_merge( |
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$this->getClassProperties($parentClass->getName(), $filter), |
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$props_arr |
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); |
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} |
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return $props_arr; |
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} |
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/** |
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* Returns class attributes |
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* |
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* @return array The resulting array |
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*/ |
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public function getAttributes() |
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{ |
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$reflector = $this->getReflector(); |
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$final = array(); |
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foreach ($reflector->getProperties() as $property) { |
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$final[] = $property->getName(); |
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} |
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return $final; |
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} |
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/** |
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* Produces a unique hash code based on values |
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* |
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* @param string $algo Desired algorythm |
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* |
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* @return string |
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*/ |
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public function hashCode($algo = 'md5') |
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{ |
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$old = $this->force; |
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$this->overrideVisibility(true); |
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$array = $this->toArray(array($this, 'everythingAsArrayModifier')); |
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\ksort($array); |
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$str = \get_class($this->object); |
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foreach ($array as $value) { |
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$str .= (is_array($value) ? json_encode($value) : $value); |
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} |
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$this->overrideVisibility($old); |
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return \hash($algo, $str); |
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} |
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/** |
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* Static toArray() modifier to handle objects and relations. |
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* {@see Accessor::toArray()} |
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* |
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* @param mixed $value Actual value |
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* |
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* @return mixed Filtered value |
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*/ |
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public function everythingAsArrayModifier($value) |
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{ |
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if (is_object($value)) { |
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$accessor = self::factory($value); |
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$value = $accessor->toArray(array($this, __METHOD__)); |
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} |
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if (is_array($value)) { |
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foreach ($value as $key => $val) { |
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$value[$key] = $val; |
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} |
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} |
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return $value; |
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} |
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/** |
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* Factory utility |
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* |
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* @param mixed $object The object we want to access |
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* |
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* @return Accessor |
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*/ |
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public static function factory($object) |
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{ |
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return new static($object); |
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} |
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/** |
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* Should we force properties visibility ? |
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* |
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* @param boolean $bool yes or no |
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* |
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* @return void |
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*/ |
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public function overrideVisibility($bool) |
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{ |
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$this->force = (bool) $bool; |
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} |
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} |
Adding a
@return
annotation to a constructor is not recommended, since a constructor does not have a meaningful return value.Please refer to the PHP core documentation on constructors.