1: <?php
  2: 
  3: /*
  4:  * This file is part of the Symfony package.
  5:  *
  6:  * (c) Fabien Potencier <fabien@symfony.com>
  7:  *
  8:  * For the full copyright and license information, please view the LICENSE
  9:  * file that was distributed with this source code.
 10:  */
 11: 
 12: namespace Symfony\Component\Config\Definition;
 13: 
 14: use Symfony\Component\Config\Definition\Exception\InvalidConfigurationException;
 15: 
 16: /**
 17:  * This node represents a value of variable type in the config tree.
 18:  *
 19:  * This node is intended for values of arbitrary type.
 20:  * Any PHP type is accepted as a value.
 21:  *
 22:  * @author Jeremy Mikola <jmikola@gmail.com>
 23:  */
 24: class VariableNode extends BaseNode implements PrototypeNodeInterface
 25: {
 26:     protected $defaultValueSet = false;
 27:     protected $defaultValue;
 28:     protected $allowEmptyValue = true;
 29: 
 30:     /**
 31:      * {@inheritDoc}
 32:      */
 33:     public function setDefaultValue($value)
 34:     {
 35:         $this->defaultValueSet = true;
 36:         $this->defaultValue = $value;
 37:     }
 38: 
 39:     /**
 40:      * {@inheritDoc}
 41:      */
 42:     public function hasDefaultValue()
 43:     {
 44:         return $this->defaultValueSet;
 45:     }
 46: 
 47:     /**
 48:      * {@inheritDoc}
 49:      */
 50:     public function getDefaultValue()
 51:     {
 52:         return $this->defaultValue instanceof \Closure ? call_user_func($this->defaultValue) : $this->defaultValue;
 53:     }
 54: 
 55:     /**
 56:      * Sets if this node is allowed to have an empty value.
 57:      *
 58:      * @param Boolean $boolean True if this entity will accept empty values.
 59:      */
 60:     public function setAllowEmptyValue($boolean)
 61:     {
 62:         $this->allowEmptyValue = (Boolean) $boolean;
 63:     }
 64: 
 65:     /**
 66:      * {@inheritDoc}
 67:      */
 68:     public function setName($name)
 69:     {
 70:         $this->name = $name;
 71:     }
 72: 
 73:     /**
 74:      * {@inheritDoc}
 75:      */
 76:     protected function validateType($value)
 77:     {
 78:     }
 79: 
 80:     /**
 81:      * {@inheritDoc}
 82:      */
 83:     protected function finalizeValue($value)
 84:     {
 85:         if (!$this->allowEmptyValue && empty($value)) {
 86:             $ex = new InvalidConfigurationException(sprintf(
 87:                 'The path "%s" cannot contain an empty value, but got %s.',
 88:                 $this->getPath(),
 89:                 json_encode($value)
 90:             ));
 91:             $ex->setPath($this->getPath());
 92: 
 93:             throw $ex;
 94:         }
 95: 
 96:         return $value;
 97:     }
 98: 
 99:     /**
100:      * {@inheritDoc}
101:      */
102:     protected function normalizeValue($value)
103:     {
104:         return $value;
105:     }
106: 
107:     /**
108:      * {@inheritDoc}
109:      */
110:     protected function mergeValues($leftSide, $rightSide)
111:     {
112:         return $rightSide;
113:     }
114: }
115: