115 lines
2.7 KiB
PHP
115 lines
2.7 KiB
PHP
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<?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\DependencyInjection\Compiler;
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use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
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/**
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* This is a directed graph of your services.
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*
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* This information can be used by your compiler passes instead of collecting
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* it themselves which improves performance quite a lot.
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*
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* @author Johannes M. Schmitt <schmittjoh@gmail.com>
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*/
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class ServiceReferenceGraph
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{
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/**
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* @var ServiceReferenceGraphNode[]
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*/
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private $nodes = array();
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/**
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* Checks if the graph has a specific node.
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*
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* @param string $id Id to check
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*
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* @return bool
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*/
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public function hasNode($id)
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{
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return isset($this->nodes[$id]);
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}
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/**
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* Gets a node by identifier.
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*
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* @param string $id The id to retrieve
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*
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* @return ServiceReferenceGraphNode
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*
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* @throws InvalidArgumentException if no node matches the supplied identifier
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*/
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public function getNode($id)
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{
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if (!isset($this->nodes[$id])) {
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throw new InvalidArgumentException(sprintf('There is no node with id "%s".', $id));
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}
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return $this->nodes[$id];
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}
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/**
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* Returns all nodes.
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*
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* @return ServiceReferenceGraphNode[]
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*/
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public function getNodes()
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{
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return $this->nodes;
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}
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/**
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* Clears all nodes.
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*/
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public function clear()
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{
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$this->nodes = array();
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}
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/**
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* Connects 2 nodes together in the Graph.
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*
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* @param string $sourceId
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* @param string $sourceValue
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* @param string $destId
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* @param string $destValue
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* @param string $reference
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*/
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public function connect($sourceId, $sourceValue, $destId, $destValue = null, $reference = null)
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{
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$sourceNode = $this->createNode($sourceId, $sourceValue);
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$destNode = $this->createNode($destId, $destValue);
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$edge = new ServiceReferenceGraphEdge($sourceNode, $destNode, $reference);
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$sourceNode->addOutEdge($edge);
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$destNode->addInEdge($edge);
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}
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/**
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* Creates a graph node.
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*
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* @param string $id
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* @param string $value
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*
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* @return ServiceReferenceGraphNode
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*/
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private function createNode($id, $value)
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{
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if (isset($this->nodes[$id]) && $this->nodes[$id]->getValue() === $value) {
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return $this->nodes[$id];
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}
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return $this->nodes[$id] = new ServiceReferenceGraphNode($id, $value);
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}
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}
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