64 lines
1.6 KiB
PHP
64 lines
1.6 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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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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namespace Symfony\Component\Config\Definition\Builder;
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use Symfony\Component\Config\Definition\NodeInterface;
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/**
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* This is the entry class for building a config tree.
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*
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* @author Johannes M. Schmitt <schmittjoh@gmail.com>
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*/
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class TreeBuilder implements NodeParentInterface
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{
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protected $tree;
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protected $root;
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protected $builder;
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/**
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* Creates the root node.
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*
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* @param string $name The name of the root node
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* @param string $type The type of the root node
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* @param NodeBuilder $builder A custom node builder instance
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*
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* @return ArrayNodeDefinition|NodeDefinition The root node (as an ArrayNodeDefinition when the type is 'array')
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*
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* @throws \RuntimeException When the node type is not supported
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*/
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public function root($name, $type = 'array', NodeBuilder $builder = null)
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{
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$builder = $builder ?: new NodeBuilder();
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return $this->root = $builder->node($name, $type)->setParent($this);
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}
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/**
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* Builds the tree.
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*
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* @return NodeInterface
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*
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* @throws \RuntimeException
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*/
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public function buildTree()
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{
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if (null === $this->root) {
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throw new \RuntimeException('The configuration tree has no root node.');
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}
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if (null !== $this->tree) {
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return $this->tree;
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}
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return $this->tree = $this->root->getNode(true);
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}
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}
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