448 lines
12 KiB
PHP
448 lines
12 KiB
PHP
<?php
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/*
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* $Id$
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.doctrine-project.org>.
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*/
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namespace Doctrine\Common\Annotations;
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/**
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* A simple parser for docblock annotations.
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*
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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* @link www.doctrine-project.org
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* @since 2.0
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* @version $Revision: 3938 $
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* @author Guilherme Blanco <guilhermeblanco@hotmail.com>
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* @author Jonathan Wage <jonwage@gmail.com>
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* @author Roman Borschel <roman@code-factory.org>
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* @author Benjamin Eberlei <kontakt@beberlei.de>
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*/
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class Parser
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{
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/**
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* Tags that are stripped prior to parsing in order to reduce parsing overhead.
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*
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* @var array
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*/
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private static $_strippedInlineTags = array(
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"{@example", "{@id", "{@internal", "{@inheritdoc",
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"{@link", "{@source", "{@toc", "{@tutorial", "*/"
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);
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/**
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* The lexer.
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*
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* @var Doctrine\Common\Annotations\Lexer
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*/
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private $_lexer;
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/**
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* Flag to control if the current Annotation is nested or not.
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*
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* @var boolean
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*/
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private $_isNestedAnnotation = false;
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/**
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* Default namespace for Annotations.
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*
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* @var string
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*/
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private $_defaultAnnotationNamespace = '';
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/**
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* Hashmap to store namespace aliases.
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*
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* @var array
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*/
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private $_namespaceAliases = array();
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/**
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* @var string
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*/
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private $_context = '';
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/**
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* Constructs a new AnnotationParser.
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*
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*/
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public function __construct()
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{
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$this->_lexer = new Lexer;
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}
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/**
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* Sets the default namespace that is assumed for an annotation that does not
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* define a namespace prefix.
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*
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* @param $defaultNamespace
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*/
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public function setDefaultAnnotationNamespace($defaultNamespace)
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{
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$this->_defaultAnnotationNamespace = $defaultNamespace;
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}
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/**
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* Sets an alias for an annotation namespace.
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*
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* @param $namespace
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* @param $alias
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*/
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public function setAnnotationNamespaceAlias($namespace, $alias)
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{
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$this->_namespaceAliases[$alias] = $namespace;
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}
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/**
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* Parses the given docblock string for annotations.
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*
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* @param string $docBlockString
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* @param string $context
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* @return array Array of Annotations. If no annotations are found, an empty array is returned.
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*/
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public function parse($docBlockString, $context='')
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{
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$this->_context = $context;
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// Strip out some known inline tags.
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$input = str_replace(self::$_strippedInlineTags, '', $docBlockString);
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// Cut of the beginning of the input until the first '@'.
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$input = substr($input, strpos($input, '@'));
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$this->_lexer->reset();
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$this->_lexer->setInput(trim($input, '* /'));
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$this->_lexer->moveNext();
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if ($this->_lexer->isNextToken(Lexer::T_AT)) {
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return $this->Annotations();
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}
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return array();
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}
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/**
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* Attempts to match the given token with the current lookahead token.
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* If they match, updates the lookahead token; otherwise raises a syntax error.
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*
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* @param int|string token type or value
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* @return bool True if tokens match; false otherwise.
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*/
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public function match($token)
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{
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if ( ! ($this->_lexer->lookahead['type'] === $token)) {
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$this->syntaxError($this->_lexer->getLiteral($token));
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}
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$this->_lexer->moveNext();
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}
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/**
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* Generates a new syntax error.
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*
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* @param string $expected Expected string.
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* @param array $token Optional token.
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* @throws AnnotationException
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*/
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private function syntaxError($expected, $token = null)
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{
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if ($token === null) {
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$token = $this->_lexer->lookahead;
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}
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$message = "Expected {$expected}, got ";
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if ($this->_lexer->lookahead === null) {
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$message .= 'end of string';
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} else {
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$message .= "'{$token['value']}' at position {$token['position']}";
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}
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if(strlen($this->_context)) {
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$message .= ' in '.$this->_context;
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}
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$message .= '.';
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throw AnnotationException::syntaxError($message);
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}
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/**
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* Annotations ::= Annotation {[ "*" ]* [Annotation]}*
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*
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* @return array
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*/
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public function Annotations()
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{
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$this->_isNestedAnnotation = false;
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$annotations = array();
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$annot = $this->Annotation();
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if ($annot !== false) {
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$annotations[get_class($annot)] = $annot;
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}
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while ($this->_lexer->lookahead !== null && $this->_lexer->isNextToken(Lexer::T_AT)) {
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$this->_isNestedAnnotation = false;
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$annot = $this->Annotation();
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if ($annot !== false) {
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$annotations[get_class($annot)] = $annot;
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}
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}
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return $annotations;
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}
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/**
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* Annotation ::= "@" AnnotationName ["(" [Values] ")"]
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* AnnotationName ::= QualifiedName | SimpleName | AliasedName
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* QualifiedName ::= NameSpacePart "\" {NameSpacePart "\"}* SimpleName
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* AliasedName ::= Alias ":" SimpleName
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* NameSpacePart ::= identifier
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* SimpleName ::= identifier
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* Alias ::= identifier
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*
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* @return mixed False if it is not a valid Annotation; instance of Annotation subclass otherwise.
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*/
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public function Annotation()
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{
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$values = array();
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$nameParts = array();
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$this->match(Lexer::T_AT);
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$this->match(Lexer::T_IDENTIFIER);
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$nameParts[] = $this->_lexer->token['value'];
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while ($this->_lexer->isNextToken(Lexer::T_NAMESPACE_SEPARATOR)) {
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$this->match(Lexer::T_NAMESPACE_SEPARATOR);
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$this->match(Lexer::T_IDENTIFIER);
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$nameParts[] = $this->_lexer->token['value'];
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}
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// Effectively pick the name of class (append default NS if none, grab from NS alias, etc)
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if (count($nameParts) == 1) {
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if (strpos($nameParts[0], ':')) {
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list ($alias, $simpleName) = explode(':', $nameParts[0]);
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$name = $this->_namespaceAliases[$alias] . $simpleName;
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} else {
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$name = $this->_defaultAnnotationNamespace . $nameParts[0];
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}
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} else {
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$name = implode('\\', $nameParts);
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}
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// Is it really an annotation class?
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if (
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(! $this->_isNestedAnnotation && $this->_lexer->lookahead != null &&
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! $this->_lexer->isNextToken(Lexer::T_OPEN_PARENTHESIS) &&
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! $this->_lexer->isNextToken(Lexer::T_AT)) ||
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! class_exists($name, false)
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) {
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$this->_lexer->skipUntil(Lexer::T_AT);
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return false;
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}
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// Next will be nested
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$this->_isNestedAnnotation = true;
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if ($this->_lexer->isNextToken(Lexer::T_OPEN_PARENTHESIS)) {
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$this->match(Lexer::T_OPEN_PARENTHESIS);
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if ( ! $this->_lexer->isNextToken(Lexer::T_CLOSE_PARENTHESIS)) {
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$values = $this->Values();
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}
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$this->match(Lexer::T_CLOSE_PARENTHESIS);
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}
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return new $name($values);
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}
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/**
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* Values ::= Array | Value {"," Value}*
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*
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* @return array
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*/
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public function Values()
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{
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$values = array();
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// Handle the case of a single array as value, i.e. @Foo({....})
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if ($this->_lexer->isNextToken(Lexer::T_OPEN_CURLY_BRACES)) {
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$values['value'] = $this->Value();
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return $values;
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}
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$values[] = $this->Value();
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while ($this->_lexer->isNextToken(Lexer::T_COMMA)) {
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$this->match(Lexer::T_COMMA);
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$value = $this->Value();
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if ( ! is_array($value)) {
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$this->syntaxError('Value', $value);
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}
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$values[] = $value;
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}
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foreach ($values as $k => $value) {
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if (is_array($value) && is_string(key($value))) {
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$key = key($value);
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$values[$key] = $value[$key];
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} else {
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$values['value'] = $value;
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}
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unset($values[$k]);
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}
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return $values;
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}
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/**
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* Value ::= PlainValue | FieldAssignment
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*
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* @return mixed
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*/
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public function Value()
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{
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$peek = $this->_lexer->glimpse();
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if ($peek['value'] === '=') {
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return $this->FieldAssignment();
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}
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return $this->PlainValue();
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}
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/**
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* PlainValue ::= integer | string | float | boolean | Array | Annotation
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*
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* @return mixed
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*/
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public function PlainValue()
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{
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if ($this->_lexer->isNextToken(Lexer::T_OPEN_CURLY_BRACES)) {
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return $this->Arrayx();
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}
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if ($this->_lexer->isNextToken(Lexer::T_AT)) {
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return $this->Annotation();
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}
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switch ($this->_lexer->lookahead['type']) {
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case Lexer::T_STRING:
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$this->match(Lexer::T_STRING);
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return $this->_lexer->token['value'];
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case Lexer::T_INTEGER:
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$this->match(Lexer::T_INTEGER);
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return $this->_lexer->token['value'];
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case Lexer::T_FLOAT:
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$this->match(Lexer::T_FLOAT);
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return $this->_lexer->token['value'];
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case Lexer::T_TRUE:
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$this->match(Lexer::T_TRUE);
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return true;
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case Lexer::T_FALSE:
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$this->match(Lexer::T_FALSE);
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return false;
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default:
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$this->syntaxError('PlainValue');
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}
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}
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/**
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* FieldAssignment ::= FieldName "=" PlainValue
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* FieldName ::= identifier
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*
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* @return array
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*/
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public function FieldAssignment()
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{
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$this->match(Lexer::T_IDENTIFIER);
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$fieldName = $this->_lexer->token['value'];
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$this->match(Lexer::T_EQUALS);
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return array($fieldName => $this->PlainValue());
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}
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/**
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* Array ::= "{" ArrayEntry {"," ArrayEntry}* "}"
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*
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* @return array
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*/
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public function Arrayx()
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{
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$array = $values = array();
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$this->match(Lexer::T_OPEN_CURLY_BRACES);
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$values[] = $this->ArrayEntry();
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while ($this->_lexer->isNextToken(Lexer::T_COMMA)) {
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$this->match(Lexer::T_COMMA);
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$values[] = $this->ArrayEntry();
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}
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$this->match(Lexer::T_CLOSE_CURLY_BRACES);
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foreach ($values as $value) {
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list ($key, $val) = $value;
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if ($key !== null) {
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$array[$key] = $val;
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} else {
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$array[] = $val;
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}
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}
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return $array;
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}
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/**
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* ArrayEntry ::= Value | KeyValuePair
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* KeyValuePair ::= Key "=" PlainValue
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* Key ::= string | integer
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*
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* @return array
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*/
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public function ArrayEntry()
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{
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$peek = $this->_lexer->glimpse();
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if ($peek['value'] == '=') {
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$this->match(
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$this->_lexer->isNextToken(Lexer::T_INTEGER) ? Lexer::T_INTEGER : Lexer::T_STRING
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);
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$key = $this->_lexer->token['value'];
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$this->match(Lexer::T_EQUALS);
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return array($key, $this->PlainValue());
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}
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return array(null, $this->Value());
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}
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} |