/usr/share/php/PHP/PMD/Rule/UnusedFormalParameter.php is in phpmd 1.5.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* This file is part of PHP_PMD.
*
* PHP Version 5
*
* Copyright (c) 2008-2012, Manuel Pichler <mapi@phpmd.org>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Manuel Pichler nor the names of his
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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.
*
* @category PHP
* @package PHP_PMD
* @subpackage Rule
* @author Manuel Pichler <mapi@phpmd.org>
* @copyright 2008-2012 Manuel Pichler. All rights reserved.
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version SVN: $Id$
* @link http://phpmd.org
*/
require_once 'PHP/PMD/Rule/AbstractLocalVariable.php';
require_once 'PHP/PMD/Rule/IFunctionAware.php';
require_once 'PHP/PMD/Rule/IMethodAware.php';
/**
* This rule collects all formal parameters of a given function or method that
* are not used in a statement of the artifact's body.
*
* @category PHP
* @package PHP_PMD
* @subpackage Rule
* @author Manuel Pichler <mapi@phpmd.org>
* @copyright 2008-2012 Manuel Pichler. All rights reserved.
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version Release: 1.5.0
* @link http://phpmd.org
*/
class PHP_PMD_Rule_UnusedFormalParameter
extends PHP_PMD_Rule_AbstractLocalVariable
implements PHP_PMD_Rule_IFunctionAware,
PHP_PMD_Rule_IMethodAware
{
/**
* Collected ast nodes.
*
* @var PHP_PMD_Node_ASTNode[]
*/
private $nodes = array();
/**
* This method checks that all parameters of a given function or method are
* used at least one time within the artifacts body.
*
* @param PHP_PMD_AbstractNode $node The context source code node.
*
* @return void
*/
public function apply(PHP_PMD_AbstractNode $node)
{
if ($this->isAbstractMethod($node)) {
return;
}
if ($this->isInheritedSignature($node)) {
return;
}
if ($this->isNotDeclaration($node)) {
return;
}
$this->nodes = array();
$this->collectParameters($node);
$this->removeUsedParameters($node);
foreach ($this->nodes as $node) {
$this->addViolation($node, array($node->getImage()));
}
}
/**
* Returns <b>true</b> when the given node is an abstract method.
*
* @param PHP_PMD_AbstractNode $node The context method or function instance.
*
* @return boolean
*/
private function isAbstractMethod(PHP_PMD_AbstractNode $node)
{
if ($node instanceof PHP_PMD_Node_Method) {
return $node->isAbstract();
}
return false;
}
/**
* Returns <b>true</b> when the given node is method with signature declared as inherited using
* {@inheritdoc} annotation.
*
* @param PHP_PMD_AbstractNode $node The context method or function instance.
*
* @return boolean
*/
private function isInheritedSignature(PHP_PMD_AbstractNode $node)
{
if ($node instanceof PHP_PMD_Node_Method) {
return preg_match('/\@inheritdoc/', $node->getDocComment());
}
return false;
}
/**
* Tests if the given <b>$node</b> is a method and if this method is also
* the initial declaration.
*
* @param PHP_PMD_AbstractNode $node The context method or a function instance.
*
* @return boolean
* @since 1.2.1
*/
private function isNotDeclaration(PHP_PMD_AbstractNode $node)
{
if ($node instanceof PHP_PMD_Node_Method) {
return !$node->isDeclaration();
}
return false;
}
/**
* This method extracts all parameters for the given function or method node
* and it stores the parameter images in the <b>$_images</b> property.
*
* @param PHP_PMD_AbstractNode $node The context function/method node.
*
* @return void
*/
private function collectParameters(PHP_PMD_AbstractNode $node)
{
// First collect the formal parameters container
$parameters = $node->getFirstChildOfType('FormalParameters');
// Now get all declarators in the formal parameters container
$declarators = $parameters->findChildrenOfType('VariableDeclarator');
foreach ($declarators as $declarator) {
$this->nodes[$declarator->getImage()] = $declarator;
}
}
/**
* This method collects all local variables in the body of the currently
* analyzed method or function and removes those parameters that are
* referenced by one of the collected variables.
*
* @param PHP_PMD_AbstractNode $node The context function or method instance.
*
* @return void
*/
private function removeUsedParameters(PHP_PMD_AbstractNode $node)
{
$variables = $node->findChildrenOfType('Variable');
foreach ($variables as $variable) {
if ($this->isRegularVariable($variable)) {
unset($this->nodes[$variable->getImage()]);
}
}
/* If the method calls func_get_args() then all parameters are
* automatically referenced */
$functionCalls = $node->findChildrenOfType('FunctionPostfix');
foreach ($functionCalls as $functionCall) {
if ($functionCall->getImage() == 'func_get_args') {
$this->nodes = array();
}
}
}
}
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