2015-09-23 11:26:27 +01:00
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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\PropertyInfo\Extractor;
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use phpDocumentor\Reflection\ClassReflector;
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use phpDocumentor\Reflection\DocBlock;
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use phpDocumentor\Reflection\FileReflector;
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use Symfony\Component\PropertyInfo\PropertyDescriptionExtractorInterface;
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use Symfony\Component\PropertyInfo\PropertyTypeExtractorInterface;
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use Symfony\Component\PropertyInfo\Type;
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/**
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* Extracts data using a PHPDoc parser.
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*
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* @author Kévin Dunglas <dunglas@gmail.com>
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*/
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class PhpDocExtractor implements PropertyDescriptionExtractorInterface, PropertyTypeExtractorInterface
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{
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const PROPERTY = 0;
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const ACCESSOR = 1;
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const MUTATOR = 2;
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/**
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* @var FileReflector[]
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*/
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private $fileReflectors = array();
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/**
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* @var DocBlock[]
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*/
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private $docBlocks = array();
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/**
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* {@inheritdoc}
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*/
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public function getShortDescription($class, $property, array $context = array())
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{
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list($docBlock) = $this->getDocBlock($class, $property);
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if (!$docBlock) {
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return;
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}
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$shortDescription = $docBlock->getShortDescription();
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if ($shortDescription) {
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return $shortDescription;
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}
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foreach ($docBlock->getTagsByName('var') as $var) {
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$parsedDescription = $var->getParsedDescription();
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if (isset($parsedDescription[0]) && '' !== $parsedDescription[0]) {
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return $parsedDescription[0];
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}
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}
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}
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/**
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* {@inheritdoc}
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*/
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public function getLongDescription($class, $property, array $context = array())
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{
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list($docBlock) = $this->getDocBlock($class, $property);
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if (!$docBlock) {
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return;
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}
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$contents = $docBlock->getLongDescription()->getContents();
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return '' === $contents ? null : $contents;
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}
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/**
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* {@inheritdoc}
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*/
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public function getTypes($class, $property, array $context = array())
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{
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list($docBlock, $source, $prefix) = $this->getDocBlock($class, $property);
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if (!$docBlock) {
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return;
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}
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switch ($source) {
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case self::PROPERTY:
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$tag = 'var';
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break;
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case self::ACCESSOR:
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$tag = 'return';
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break;
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case self::MUTATOR:
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$tag = 'param';
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break;
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}
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$types = array();
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foreach ($docBlock->getTagsByName($tag) as $tag) {
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$varTypes = $tag->getTypes();
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// If null is present, all types are nullable
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$nullKey = array_search(Type::BUILTIN_TYPE_NULL, $varTypes);
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$nullable = false !== $nullKey;
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// Remove the null type from the type if other types are defined
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if ($nullable && count($varTypes) > 1) {
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unset($varTypes[$nullKey]);
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}
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foreach ($varTypes as $varType) {
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$type = $this->createType($varType, $nullable);
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if (null !== $type) {
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$types[] = $type;
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}
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}
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}
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if (!isset($types[0])) {
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return;
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}
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if (!in_array($prefix, ReflectionExtractor::$arrayMutatorPrefixes)) {
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return $types;
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}
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return array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), $types[0]));
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}
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/**
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* Gets the FileReflector associated with the class.
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*
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* @param \ReflectionClass $reflectionClass
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*
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* @return FileReflector|null
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*/
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private function getFileReflector(\ReflectionClass $reflectionClass)
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{
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if (!($fileName = $reflectionClass->getFileName()) || 'hh' === pathinfo($fileName, PATHINFO_EXTENSION)) {
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return;
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}
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if (isset($this->fileReflectors[$fileName])) {
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return $this->fileReflectors[$fileName];
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}
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$this->fileReflectors[$fileName] = new FileReflector($fileName);
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$this->fileReflectors[$fileName]->process();
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return $this->fileReflectors[$fileName];
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}
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/**
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* Gets the DocBlock for this property.
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*
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* @param string $class
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* @param string $property
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*
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* @return array
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*/
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private function getDocBlock($class, $property)
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{
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$propertyHash = sprintf('%s::%s', $class, $property);
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if (isset($this->docBlocks[$propertyHash])) {
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return $this->docBlocks[$propertyHash];
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}
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$ucFirstProperty = ucfirst($property);
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switch (true) {
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case $docBlock = $this->getDocBlockFromProperty($class, $property):
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$data = array($docBlock, self::PROPERTY, null);
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break;
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case list($docBlock) = $this->getDocBlockFromMethod($class, $ucFirstProperty, self::ACCESSOR):
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$data = array($docBlock, self::ACCESSOR, null);
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break;
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case list($docBlock, $prefix) = $this->getDocBlockFromMethod($class, $ucFirstProperty, self::MUTATOR):
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$data = array($docBlock, self::MUTATOR, $prefix);
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break;
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default:
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2016-01-18 10:44:30 +00:00
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$data = array(null, null, null);
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2015-09-23 11:26:27 +01:00
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}
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return $this->docBlocks[$propertyHash] = $data;
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}
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/**
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* Gets the DocBlock from a property.
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*
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* @param string $class
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* @param string $property
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*
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* @return DocBlock|null
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*/
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private function getDocBlockFromProperty($class, $property)
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{
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// Use a ReflectionProperty instead of $class to get the parent class if applicable
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try {
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$reflectionProperty = new \ReflectionProperty($class, $property);
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} catch (\ReflectionException $reflectionException) {
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return;
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}
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$reflectionCLass = $reflectionProperty->getDeclaringClass();
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$fileReflector = $this->getFileReflector($reflectionCLass);
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if (!$fileReflector) {
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return;
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}
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foreach ($fileReflector->getClasses() as $classReflector) {
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$className = $this->getClassName($classReflector);
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if ($className === $reflectionCLass->name) {
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foreach ($classReflector->getProperties() as $propertyReflector) {
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// strip the $ prefix
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$propertyName = substr($propertyReflector->getName(), 1);
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if ($propertyName === $property) {
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return $propertyReflector->getDocBlock();
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}
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}
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}
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}
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}
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/**
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* Gets DocBlock from accessor or mutator method.
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*
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* @param string $class
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* @param string $ucFirstProperty
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* @param int $type
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*
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* @return DocBlock|null
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*/
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private function getDocBlockFromMethod($class, $ucFirstProperty, $type)
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{
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$prefixes = $type === self::ACCESSOR ? ReflectionExtractor::$accessorPrefixes : ReflectionExtractor::$mutatorPrefixes;
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foreach ($prefixes as $prefix) {
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$methodName = $prefix.$ucFirstProperty;
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try {
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$reflectionMethod = new \ReflectionMethod($class, $methodName);
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if (
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(self::ACCESSOR === $type && 0 === $reflectionMethod->getNumberOfRequiredParameters()) ||
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(self::MUTATOR === $type && $reflectionMethod->getNumberOfParameters() >= 1)
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) {
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break;
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}
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} catch (\ReflectionException $reflectionException) {
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// Try the next prefix if the method doesn't exist
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}
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}
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if (!isset($reflectionMethod)) {
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return;
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}
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$reflectionClass = $reflectionMethod->getDeclaringClass();
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$fileReflector = $this->getFileReflector($reflectionClass);
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if (!$fileReflector) {
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return;
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}
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foreach ($fileReflector->getClasses() as $classReflector) {
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$className = $this->getClassName($classReflector);
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if ($className === $reflectionClass->name) {
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if ($methodReflector = $classReflector->getMethod($methodName)) {
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return array($methodReflector->getDocBlock(), $prefix);
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}
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}
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}
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}
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/**
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* Gets the normalized class name (without trailing backslash).
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*
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* @param ClassReflector $classReflector
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*
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* @return string
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*/
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private function getClassName(ClassReflector $classReflector)
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{
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$className = $classReflector->getName();
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if ('\\' === $className[0]) {
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return substr($className, 1);
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}
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return $className;
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}
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/**
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* Creates a {@see Type} from a PHPDoc type.
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*
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* @param string $docType
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* @param bool $nullable
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*
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* @return Type|null
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*/
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private function createType($docType, $nullable)
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{
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// Cannot guess
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if (!$docType || 'mixed' === $docType) {
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return;
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}
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if ($collection = '[]' === substr($docType, -2)) {
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$docType = substr($docType, 0, -2);
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}
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$docType = $this->normalizeType($docType);
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list($phpType, $class) = $this->getPhpTypeAndClass($docType);
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$array = 'array' === $docType;
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if ($collection || $array) {
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if ($array || 'mixed' === $docType) {
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$collectionKeyType = null;
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$collectionValueType = null;
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} else {
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$collectionKeyType = new Type(Type::BUILTIN_TYPE_INT);
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$collectionValueType = new Type($phpType, false, $class);
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}
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return new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, $collectionKeyType, $collectionValueType);
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}
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return new Type($phpType, $nullable, $class);
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}
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/**
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* Normalizes the type.
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*
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* @param string $docType
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*
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* @return string
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*/
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private function normalizeType($docType)
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{
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switch ($docType) {
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case 'integer':
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return 'int';
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case 'boolean':
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return 'bool';
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// real is not part of the PHPDoc standard, so we ignore it
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case 'double':
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return 'float';
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case 'callback':
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return 'callable';
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case 'void':
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return 'null';
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default:
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return $docType;
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}
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}
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/**
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* Gets an array containing the PHP type and the class.
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*
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* @param string $docType
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*
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* @return array
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*/
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private function getPhpTypeAndClass($docType)
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{
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if (in_array($docType, Type::$builtinTypes)) {
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return array($docType, null);
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}
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return array('object', substr($docType, 1));
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}
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}
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