Viewing file:  XML.php (4.8 KB) -rw-r--r--
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<?php
namespace PhpParser\Unserializer;
use XMLReader;
use DomainException;
use PhpParser\Unserializer;
class XML implements Unserializer
{
protected $reader;
public function __construct() {
$this->reader = new XMLReader;
}
public function unserialize($string) {
$this->reader->XML($string);
$this->reader->read();
if ('AST' !== $this->reader->name) {
throw new DomainException('AST root element not found');
}
return $this->read($this->reader->depth);
}
protected function read($depthLimit, $throw = true, &$nodeFound = null) {
$nodeFound = true;
while ($this->reader->read() && $depthLimit < $this->reader->depth) {
if (XMLReader::ELEMENT !== $this->reader->nodeType) {
continue;
}
if ('node' === $this->reader->prefix) {
return $this->readNode();
} elseif ('scalar' === $this->reader->prefix) {
return $this->readScalar();
} elseif ('comment' === $this->reader->name) {
return $this->readComment();
} else {
throw new DomainException(sprintf('Unexpected node of type "%s"', $this->reader->name));
}
}
$nodeFound = false;
if ($throw) {
throw new DomainException('Expected node or scalar');
}
}
protected function readNode() {
$className = $this->getClassNameFromType($this->reader->localName);
// create the node without calling it's constructor
$node = unserialize(
sprintf(
"O:%d:\"%s\":1:{s:13:\"\0*\0attributes\";a:0:{}}",
strlen($className), $className
)
);
$depthLimit = $this->reader->depth;
while ($this->reader->read() && $depthLimit < $this->reader->depth) {
if (XMLReader::ELEMENT !== $this->reader->nodeType) {
continue;
}
$type = $this->reader->prefix;
if ('subNode' !== $type && 'attribute' !== $type) {
throw new DomainException(
sprintf('Expected sub node or attribute, got node of type "%s"', $this->reader->name)
);
}
$name = $this->reader->localName;
$value = $this->read($this->reader->depth);
if ('subNode' === $type) {
$node->$name = $value;
} else {
$node->setAttribute($name, $value);
}
}
return $node;
}
protected function readScalar() {
switch ($name = $this->reader->localName) {
case 'array':
$depth = $this->reader->depth;
$array = array();
while (true) {
$node = $this->read($depth, false, $nodeFound);
if (!$nodeFound) {
break;
}
$array[] = $node;
}
return $array;
case 'string':
return $this->reader->readString();
case 'int':
return $this->parseInt($this->reader->readString());
case 'float':
$text = $this->reader->readString();
if (false === $float = filter_var($text, FILTER_VALIDATE_FLOAT)) {
throw new DomainException(sprintf('"%s" is not a valid float', $text));
}
return $float;
case 'true':
case 'false':
case 'null':
if (!$this->reader->isEmptyElement) {
throw new DomainException(sprintf('"%s" scalar must be empty', $name));
}
return constant($name);
default:
throw new DomainException(sprintf('Unknown scalar type "%s"', $name));
}
}
private function parseInt($text) {
if (false === $int = filter_var($text, FILTER_VALIDATE_INT)) {
throw new DomainException(sprintf('"%s" is not a valid integer', $text));
}
return $int;
}
protected function readComment() {
$className = $this->reader->getAttribute('isDocComment') === 'true'
? 'PhpParser\Comment\Doc'
: 'PhpParser\Comment'
;
return new $className(
$this->reader->readString(),
$this->parseInt($this->reader->getAttribute('line'))
);
}
protected function getClassNameFromType($type) {
$className = 'PhpParser\\Node\\' . strtr($type, '_', '\\');
if (!class_exists($className)) {
$className .= '_';
}
if (!class_exists($className)) {
throw new DomainException(sprintf('Unknown node type "%s"', $type));
}
return $className;
}
}
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