<?php

/*

 * This file is part of the Symfony package.

 *

 * (c) Fabien Potencier <fabien@symfony.com>

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace Symfony\Component\Config\Definition;

use Symfony\Component\Config\Definition\Exception\InvalidConfigurationException;

use Symfony\Component\Config\Definition\Builder\NodeDefinition;

/**

 * This node represents a variable value in the config tree.

 *

 * This node is intended for arbitrary variables.

 * Any PHP type is accepted as a value.

 *

 * @author Jeremy Mikola <jmikola@gmail.com>

 */

class VariableNode extends BaseNode implements PrototypeNodeInterface

{

    protected $defaultValueSet = false;

    protected $defaultValue;

    protected $allowEmptyValue = true;

    /**

     * {@inheritDoc}

     */

    public function setDefaultValue($value)

    {

        $this->defaultValueSet = true;

        $this->defaultValue = $value;

    }

    /**

     * {@inheritDoc}

     */

    public function hasDefaultValue()

    {

        return $this->defaultValueSet;

    }

    /**

     * {@inheritDoc}

     */

    public function getDefaultValue()

    {

        return $this->defaultValue instanceof \Closure ? call_user_func($this->defaultValue) : $this->defaultValue;

    }

    /**

     * Sets if this node is allowed to have an empty value.

     *

     * @param Boolean $boolean True if this entity will accept empty values.

     */

    public function setAllowEmptyValue($boolean)

    {

        $this->allowEmptyValue = (Boolean) $boolean;

    }

    /**

     * {@inheritDoc}

     */

    public function setName($name)

    {

        $this->name = $name;

    }

    /**

     * {@inheritDoc}

     */

    protected function validateType($value)

    {

    }

    /**

     * {@inheritDoc}

     */

    protected function finalizeValue($value)

    {

        if (!$this->allowEmptyValue && empty($value)) {

            $ex = new InvalidConfigurationException(sprintf(

                'The path "%s" cannot contain an empty value, but got %s.',

                $this->getPath(),

                json_encode($value)

            ));

            $ex->setPath($this->getPath());

            throw $ex;

        }

        return $value;

    }

    /**

     * {@inheritDoc}

     */

    protected function normalizeValue($value)

    {

        return $value;

    }

    /**

     * {@inheritDoc}

     */

    protected function mergeValues($leftSide, $rightSide)

    {

        return $rightSide;

    }

}