zx/vendor/doctrine/annotations/lib/Doctrine/Common/Annotations/TokenParser.php

188 lines
6.0 KiB
PHP

<?php
/*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the MIT license. For more information, see
* <http://www.doctrine-project.org>.
*/
namespace Doctrine\Common\Annotations;
/**
* Parses a file for namespaces/use/class declarations.
*
* @author Fabien Potencier <fabien@symfony.com>
* @author Christian Kaps <christian.kaps@mohiva.com>
*/
class TokenParser
{
/**
* The token list.
*
* @var array
*/
private $tokens;
/**
* The number of tokens.
*
* @var int
*/
private $numTokens;
/**
* The current array pointer.
*
* @var int
*/
private $pointer = 0;
/**
* @param string $contents
*/
public function __construct($contents)
{
$this->tokens = token_get_all($contents);
// The PHP parser sets internal compiler globals for certain things. Annoyingly, the last docblock comment it
// saw gets stored in doc_comment. When it comes to compile the next thing to be include()d this stored
// doc_comment becomes owned by the first thing the compiler sees in the file that it considers might have a
// docblock. If the first thing in the file is a class without a doc block this would cause calls to
// getDocBlock() on said class to return our long lost doc_comment. Argh.
// To workaround, cause the parser to parse an empty docblock. Sure getDocBlock() will return this, but at least
// it's harmless to us.
token_get_all("<?php\n/**\n *\n */");
$this->numTokens = count($this->tokens);
}
/**
* Gets the next non whitespace and non comment token.
*
* @param boolean $docCommentIsComment If TRUE then a doc comment is considered a comment and skipped.
* If FALSE then only whitespace and normal comments are skipped.
*
* @return array|null The token if exists, null otherwise.
*/
public function next($docCommentIsComment = TRUE)
{
for ($i = $this->pointer; $i < $this->numTokens; $i++) {
$this->pointer++;
if ($this->tokens[$i][0] === T_WHITESPACE ||
$this->tokens[$i][0] === T_COMMENT ||
($docCommentIsComment && $this->tokens[$i][0] === T_DOC_COMMENT)) {
continue;
}
return $this->tokens[$i];
}
return null;
}
/**
* Parses a single use statement.
*
* @return array A list with all found class names for a use statement.
*/
public function parseUseStatement()
{
$class = '';
$alias = '';
$statements = array();
$explicitAlias = false;
while (($token = $this->next())) {
$isNameToken = $token[0] === T_STRING || $token[0] === T_NS_SEPARATOR;
if (!$explicitAlias && $isNameToken) {
$class .= $token[1];
$alias = $token[1];
} else if ($explicitAlias && $isNameToken) {
$alias .= $token[1];
} else if ($token[0] === T_AS) {
$explicitAlias = true;
$alias = '';
} else if ($token === ',') {
$statements[strtolower($alias)] = $class;
$class = '';
$alias = '';
$explicitAlias = false;
} else if ($token === ';') {
$statements[strtolower($alias)] = $class;
break;
} else {
break;
}
}
return $statements;
}
/**
* Gets all use statements.
*
* @param string $namespaceName The namespace name of the reflected class.
*
* @return array A list with all found use statements.
*/
public function parseUseStatements($namespaceName)
{
$statements = array();
while (($token = $this->next())) {
if ($token[0] === T_USE) {
$statements = array_merge($statements, $this->parseUseStatement());
continue;
}
if ($token[0] !== T_NAMESPACE || $this->parseNamespace() != $namespaceName) {
continue;
}
// Get fresh array for new namespace. This is to prevent the parser to collect the use statements
// for a previous namespace with the same name. This is the case if a namespace is defined twice
// or if a namespace with the same name is commented out.
$statements = array();
}
return $statements;
}
/**
* Gets the namespace.
*
* @return string The found namespace.
*/
public function parseNamespace()
{
$name = '';
while (($token = $this->next()) && ($token[0] === T_STRING || $token[0] === T_NS_SEPARATOR)) {
$name .= $token[1];
}
return $name;
}
/**
* Gets the class name.
*
* @return string The found class name.
*/
public function parseClass()
{
// Namespaces and class names are tokenized the same: T_STRINGs
// separated by T_NS_SEPARATOR so we can use one function to provide
// both.
return $this->parseNamespace();
}
}