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<?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\Builder;
/**
* This class provides a fluent interface for building a node.
*
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
*/
class NodeBuilder implements NodeParentInterface
{
protected $parent;
protected $nodeMapping;
public function __construct()
{
$this->nodeMapping = [
'variable' => VariableNodeDefinition::class,
'scalar' => ScalarNodeDefinition::class,
'boolean' => BooleanNodeDefinition::class,
'integer' => IntegerNodeDefinition::class,
'float' => FloatNodeDefinition::class,
'array' => ArrayNodeDefinition::class,
'enum' => EnumNodeDefinition::class,
];
}
/**
* Set the parent node.
*
* @return $this
*/
public function setParent(ParentNodeDefinitionInterface $parent = null)
{
$this->parent = $parent;
return $this;
}
/**
* Creates a child array node.
*
* @return ArrayNodeDefinition
*/
public function arrayNode(string $name)
{
return $this->node($name, 'array');
}
/**
* Creates a child scalar node.
*
* @return ScalarNodeDefinition
*/
public function scalarNode(string $name)
{
return $this->node($name, 'scalar');
}
/**
* Creates a child Boolean node.
*
* @return BooleanNodeDefinition
*/
public function booleanNode(string $name)
{
return $this->node($name, 'boolean');
}
/**
* Creates a child integer node.
*
* @return IntegerNodeDefinition
*/
public function integerNode(string $name)
{
return $this->node($name, 'integer');
}
/**
* Creates a child float node.
*
* @return FloatNodeDefinition
*/
public function floatNode(string $name)
{
return $this->node($name, 'float');
}
/**
* Creates a child EnumNode.
*
* @return EnumNodeDefinition
*/
public function enumNode(string $name)
{
return $this->node($name, 'enum');
}
/**
* Creates a child variable node.
*
* @return VariableNodeDefinition
*/
public function variableNode(string $name)
{
return $this->node($name, 'variable');
}
/**
* Returns the parent node.
*
* @return NodeDefinition&ParentNodeDefinitionInterface
*/
public function end()
{
return $this->parent;
}
/**
* Creates a child node.
*
* @return NodeDefinition
*
* @throws \RuntimeException When the node type is not registered
* @throws \RuntimeException When the node class is not found
*/
public function node(?string $name, string $type)
{
$class = $this->getNodeClass($type);
$node = new $class($name);
$this->append($node);
return $node;
}
/**
* Appends a node definition.
*
* Usage:
*
* $node = new ArrayNodeDefinition('name')
* ->children()
* ->scalarNode('foo')->end()
* ->scalarNode('baz')->end()
* ->append($this->getBarNodeDefinition())
* ->end()
* ;
*
* @return $this
*/
public function append(NodeDefinition $node)
{
if ($node instanceof BuilderAwareInterface) {
$builder = clone $this;
$builder->setParent(null);
$node->setBuilder($builder);
}
if (null !== $this->parent) {
$this->parent->append($node);
// Make this builder the node parent to allow for a fluid interface
$node->setParent($this);
}
return $this;
}
/**
* Adds or overrides a node Type.
*
* @param string $type The name of the type
* @param string $class The fully qualified name the node definition class
*
* @return $this
*/
public function setNodeClass(string $type, string $class)
{
$this->nodeMapping[strtolower($type)] = $class;
return $this;
}
/**
* Returns the class name of the node definition.
*
* @return string
*
* @throws \RuntimeException When the node type is not registered
* @throws \RuntimeException When the node class is not found
*/
protected function getNodeClass(string $type)
{
$type = strtolower($type);
if (!isset($this->nodeMapping[$type])) {
throw new \RuntimeException(sprintf('The node type "%s" is not registered.', $type));
}
$class = $this->nodeMapping[$type];
if (!class_exists($class)) {
throw new \RuntimeException(sprintf('The node class "%s" does not exist.', $class));
}
return $class;
}
}
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