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<?php |
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namespace PhpParser\Unserializer; |
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use XMLReader; |
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use DomainException; |
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use PhpParser\Unserializer; |
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class XML implements Unserializer |
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{ |
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protected $reader; |
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public function __construct() { |
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$this->reader = new XMLReader; |
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} |
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public function unserialize($string) { |
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$this->reader->XML($string); |
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$this->reader->read(); |
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if ('AST' !== $this->reader->name) { |
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throw new DomainException('AST root element not found'); |
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} |
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return $this->read($this->reader->depth); |
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} |
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protected function read($depthLimit, $throw = true, &$nodeFound = null) { |
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$nodeFound = true; |
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while ($this->reader->read() && $depthLimit < $this->reader->depth) { |
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if (XMLReader::ELEMENT !== $this->reader->nodeType) { |
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continue; |
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} |
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if ('node' === $this->reader->prefix) { |
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return $this->readNode(); |
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} elseif ('scalar' === $this->reader->prefix) { |
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return $this->readScalar(); |
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} elseif ('comment' === $this->reader->name) { |
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return $this->readComment(); |
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} else { |
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throw new DomainException(sprintf('Unexpected node of type "%s"', $this->reader->name)); |
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} |
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} |
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$nodeFound = false; |
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if ($throw) { |
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throw new DomainException('Expected node or scalar'); |
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} |
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} |
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protected function readNode() { |
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$className = $this->getClassNameFromType($this->reader->localName); |
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// create the node without calling it's constructor |
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$node = unserialize( |
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sprintf( |
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"O:%d:\"%s\":1:{s:13:\"\0*\0attributes\";a:0:{}}", |
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strlen($className), $className |
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) |
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); |
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$depthLimit = $this->reader->depth; |
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while ($this->reader->read() && $depthLimit < $this->reader->depth) { |
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if (XMLReader::ELEMENT !== $this->reader->nodeType) { |
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continue; |
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} |
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$type = $this->reader->prefix; |
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if ('subNode' !== $type && 'attribute' !== $type) { |
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throw new DomainException( |
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sprintf('Expected sub node or attribute, got node of type "%s"', $this->reader->name) |
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); |
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} |
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$name = $this->reader->localName; |
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$value = $this->read($this->reader->depth); |
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if ('subNode' === $type) { |
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$node->$name = $value; |
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} else { |
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$node->setAttribute($name, $value); |
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} |
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} |
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return $node; |
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} |
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protected function readScalar() { |
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switch ($name = $this->reader->localName) { |
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case 'array': |
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$depth = $this->reader->depth; |
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$array = array(); |
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while (true) { |
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$node = $this->read($depth, false, $nodeFound); |
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if (!$nodeFound) { |
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break; |
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} |
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$array[] = $node; |
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} |
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return $array; |
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case 'string': |
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return $this->reader->readString(); |
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case 'int': |
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return $this->parseInt($this->reader->readString()); |
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case 'float': |
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$text = $this->reader->readString(); |
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if (false === $float = filter_var($text, FILTER_VALIDATE_FLOAT)) { |
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throw new DomainException(sprintf('"%s" is not a valid float', $text)); |
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} |
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return $float; |
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case 'true': |
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case 'false': |
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case 'null': |
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if (!$this->reader->isEmptyElement) { |
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throw new DomainException(sprintf('"%s" scalar must be empty', $name)); |
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} |
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return constant($name); |
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default: |
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throw new DomainException(sprintf('Unknown scalar type "%s"', $name)); |
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} |
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} |
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private function parseInt($text) { |
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if (false === $int = filter_var($text, FILTER_VALIDATE_INT)) { |
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throw new DomainException(sprintf('"%s" is not a valid integer', $text)); |
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} |
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return $int; |
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} |
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protected function readComment() { |
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$className = $this->reader->getAttribute('isDocComment') === 'true' |
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? 'PhpParser\Comment\Doc' |
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: 'PhpParser\Comment' |
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; |
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return new $className( |
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$this->reader->readString(), |
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$this->parseInt($this->reader->getAttribute('line')) |
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); |
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} |
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protected function getClassNameFromType($type) { |
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$className = 'PhpParser\\Node\\' . strtr($type, '_', '\\'); |
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if (!class_exists($className)) { |
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$className .= '_'; |
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} |
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if (!class_exists($className)) { |
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throw new DomainException(sprintf('Unknown node type "%s"', $type)); |
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} |
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return $className; |
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} |
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} |
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nikic /
PHP-Parser
