--- /dev/null
+<?php
+
+namespace PhpParser\Serializer;
+
+use PhpParser\Comment;
+use PhpParser\Node;
+use PhpParser\Serializer;
+use XMLWriter;
+
+/**
+ * @deprecated
+ */
+class XML implements Serializer
+{
+ protected $writer;
+
+ /**
+ * Constructs a XML serializer.
+ */
+ public function __construct() {
+ $this->writer = new XMLWriter;
+ $this->writer->openMemory();
+ $this->writer->setIndent(true);
+ }
+
+ public function serialize(array $nodes) {
+ $this->writer->flush();
+ $this->writer->startDocument('1.0', 'UTF-8');
+
+ $this->writer->startElement('AST');
+ $this->writer->writeAttribute('xmlns:node', 'http://nikic.github.com/PHPParser/XML/node');
+ $this->writer->writeAttribute('xmlns:subNode', 'http://nikic.github.com/PHPParser/XML/subNode');
+ $this->writer->writeAttribute('xmlns:attribute', 'http://nikic.github.com/PHPParser/XML/attribute');
+ $this->writer->writeAttribute('xmlns:scalar', 'http://nikic.github.com/PHPParser/XML/scalar');
+
+ $this->_serialize($nodes);
+
+ $this->writer->endElement();
+
+ return $this->writer->outputMemory();
+ }
+
+ protected function _serialize($node) {
+ if ($node instanceof Node) {
+ $this->writer->startElement('node:' . $node->getType());
+
+ foreach ($node->getAttributes() as $name => $value) {
+ $this->writer->startElement('attribute:' . $name);
+ $this->_serialize($value);
+ $this->writer->endElement();
+ }
+
+ foreach ($node as $name => $subNode) {
+ $this->writer->startElement('subNode:' . $name);
+ $this->_serialize($subNode);
+ $this->writer->endElement();
+ }
+
+ $this->writer->endElement();
+ } elseif ($node instanceof Comment) {
+ $this->writer->startElement('comment');
+ $this->writer->writeAttribute('isDocComment', $node instanceof Comment\Doc ? 'true' : 'false');
+ $this->writer->writeAttribute('line', (string) $node->getLine());
+ $this->writer->text($node->getText());
+ $this->writer->endElement();
+ } elseif (is_array($node)) {
+ $this->writer->startElement('scalar:array');
+ foreach ($node as $subNode) {
+ $this->_serialize($subNode);
+ }
+ $this->writer->endElement();
+ } elseif (is_string($node)) {
+ $this->writer->writeElement('scalar:string', $node);
+ } elseif (is_int($node)) {
+ $this->writer->writeElement('scalar:int', (string) $node);
+ } elseif (is_float($node)) {
+ // TODO Higher precision conversion?
+ $this->writer->writeElement('scalar:float', (string) $node);
+ } elseif (true === $node) {
+ $this->writer->writeElement('scalar:true');
+ } elseif (false === $node) {
+ $this->writer->writeElement('scalar:false');
+ } elseif (null === $node) {
+ $this->writer->writeElement('scalar:null');
+ } else {
+ throw new \InvalidArgumentException('Unexpected node type');
+ }
+ }
+}