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<?php
/**
* This file is part of PDepend.
*
* PHP Version 5
*
* Copyright (c) 2008-2017 Manuel Pichler <[email protected]>.
* 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.
*
* @copyright 2008-2017 Manuel Pichler. All rights reserved.
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
*
* @since 0.9.6
*/
namespace PDepend\Source\AST;
use BadMethodCallException;
use OutOfBoundsException;
use PDepend\Source\ASTVisitor\ASTVisitor;
/**
* This is an abstract base implementation of the ast node interface.
*
* @copyright 2008-2017 Manuel Pichler. All rights reserved.
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
*
* @since 0.9.6
*/
abstract class AbstractASTNode implements ASTNode
{
/**
* Parsed child nodes of this node.
*
* @var ASTNode[]
*/
protected $nodes = array();
/**
* The parent node of this node or <b>null</b> when this node is the root
* of a node tree.
*
* @var ASTNode|null
*/
protected $parent = null;
/**
* An optional doc comment for this node.
*
* @var string
*/
protected $comment = null;
/**
* Metadata for this node instance, serialized in a string. This string
* contains the start, end line, and the start, end column and the node
* image in a colon seperated string.
*
* @var string
*
* @since 0.10.4
*/
protected $metadata = '::::';
/**
* @template T of array<string, mixed>|string|null
*
* @param T $data
*
* @return T
*/
public function accept(ASTVisitor $visitor, $data = null)
{
$methodName = 'visit' . substr(get_class($this), 22);
return call_user_func(array($visitor, $methodName), $this, $data);
}
/**
* Constructs a new ast node instance.
*
* @param string $image The source image for this node.
*/
public function __construct($image = null)
{
$this->metadata = str_repeat(':', $this->getMetadataSize() - 1);
$this->setImage($image);
}
/**
* Sets the image for this ast node.
*
* @param string $image
*
* @return void
*/
public function setImage($image)
{
$this->setMetadata(4, $image);
}
/**
* Returns the source image of this ast node.
*
* @return string
*/
public function getImage()
{
return $this->getMetadata(4);
}
/**
* Returns the source image of this ast node without the namespace prefix.
*
* @return string
*/
public function getImageWithoutNamespace()
{
$imagePath = explode('\\', $this->getMetadata(4));
return array_pop($imagePath);
}
/**
* Returns the start line for this ast node.
*
* @return int
*/
public function getStartLine()
{
return $this->getMetadataInteger(0);
}
/**
* Returns the start column for this ast node.
*
* @return int
*/
public function getStartColumn()
{
return $this->getMetadataInteger(2);
}
/**
* Returns the end line for this ast node.
*
* @return int
*/
public function getEndLine()
{
return $this->getMetadataInteger(1);
}
/**
* Returns the end column for this ast node.
*
* @return int
*/
public function getEndColumn()
{
return $this->getMetadataInteger(3);
}
/**
* For better performance we have moved the single setter methods for the
* node columns and lines into this configure method.
*
* @param int $startLine
* @param int $endLine
* @param int $startColumn
* @param int $endColumn
*
* @return void
*
* @since 0.9.10
*/
public function configureLinesAndColumns(
$startLine,
$endLine,
$startColumn,
$endColumn
) {
$this->setMetadataInteger(0, $startLine);
$this->setMetadataInteger(1, $endLine);
$this->setMetadataInteger(2, $startColumn);
$this->setMetadataInteger(3, $endColumn);
}
/**
* Returns an integer value that was stored under the given index.
*
* @param int $index
*
* @return int
*
* @since 0.10.4
*/
protected function getMetadataInteger($index)
{
return (int) $this->getMetadata($index);
}
/**
* Stores an integer value under the given index in the internally used data
* string.
*
* @param int $index
* @param int $value
*
* @return void
*
* @since 0.10.4
*/
protected function setMetadataInteger($index, $value)
{
$this->setMetadata($index, (string)$value);
}
/**
* Returns a boolean value that was stored under the given index.
*
* @param int $index
*
* @return bool
*
* @since 0.10.4
*/
protected function getMetadataBoolean($index)
{
return (bool) $this->getMetadata($index);
}
/**
* Stores a boolean value under the given index in the internally used data
* string.
*
* @param int $index
* @param bool $value
*
* @return void
*
* @since 0.10.4
*/
protected function setMetadataBoolean($index, $value)
{
$this->setMetadata($index, $value ? '1' : '0');
}
/**
* Returns the value that was stored under the given index.
*
* @param int $index
*
* @return string
*
* @since 0.10.4
*/
protected function getMetadata($index)
{
$metadata = explode(':', $this->metadata, $this->getMetadataSize());
return $metadata[$index];
}
/**
* Stores the given value under the given index in an internal storage
* container.
*
* @param int $index
* @param string $value
*
* @return void
*
* @since 0.10.4
*/
protected function setMetadata($index, $value)
{
$metadata = explode(':', $this->metadata, $this->getMetadataSize());
$metadata[$index] = $value;
$this->metadata = join(':', $metadata);
}
/**
* Returns the total number of the used property bag.
*
* @return int
*
* @since 0.10.4
*/
protected function getMetadataSize()
{
return 5;
}
/**
* Returns the node instance for the given index or throws an exception.
*
* @param int $index
*
* @throws OutOfBoundsException When no node exists at the given index.
*
* @return ASTNode
*/
public function getChild($index)
{
if (isset($this->nodes[$index])) {
return $this->nodes[$index];
}
throw new OutOfBoundsException(
sprintf(
'No node found at index %d in node of type: %s',
$index,
get_class($this)
)
);
}
/**
* This method returns all direct children of the actual node.
*
* @return ASTNode[]
*/
public function getChildren()
{
return $this->nodes;
}
/**
* This method will search recursive for the first child node that is an
* instance of the given <b>$targetType</b>. The returned value will be
* <b>null</b> if no child exists for that.
*
* @template T of ASTNode
*
* @param class-string<T> $targetType
*
* @return T|null
*/
public function getFirstChildOfType($targetType)
{
foreach ($this->nodes as $node) {
if ($node instanceof $targetType) {
return $node;
}
if (($child = $node->getFirstChildOfType($targetType)) !== null) {
return $child;
}
}
return null;
}
/**
* This method will search recursive for all child nodes that are an
* instance of the given <b>$targetType</b>. The returned value will be
* an empty <b>array</b> if no child exists for that.
*
* @template T of ASTNode
* @template R of T
*
* @param class-string<T> $targetType Searched class or interface type.
* @param R[] $results Already found node instances. This parameter
* is only for internal usage.
*
* @return T[]
*/
public function findChildrenOfType($targetType, array &$results = array())
{
foreach ($this->nodes as $node) {
if ($node instanceof $targetType) {
$results[] = $node;
}
$node->findChildrenOfType($targetType, $results);
}
return $results;
}
/**
* This method adds a new child node at the first position of the children.
*
* @return void
*/
public function prependChild(ASTNode $node)
{
array_unshift($this->nodes, $node);
$node->setParent($this);
}
/**
* This method adds a new child node to this node instance.
*
* @param ASTNode $node
*
* @return void
*/
public function addChild(ASTNode $node)
{
$this->nodes[] = $node;
$node->setParent($this);
}
/**
* Returns the parent node of this node or <b>null</b> when this node is
* the root of a node tree.
*
* @return ASTNode
*/
public function getParent()
{
return $this->parent;
}
/**
* Traverses up the node tree and finds all parent nodes that are instances
* of <b>$parentType</b>.
*
* @param string $parentType
*
* @return ASTNode[]
*/
public function getParentsOfType($parentType)
{
$parents = array();
$parentNode = $this->parent;
while (is_object($parentNode)) {
if ($parentNode instanceof $parentType) {
array_unshift($parents, $parentNode);
}
$parentNode = $parentNode->getParent();
}
return $parents;
}
/**
* Sets the parent node of this node.
*
* @return void
*/
public function setParent(ASTNode $node)
{
$this->parent = $node;
}
/**
* Returns a doc comment for this node or <b>null</b> when no comment was
* found.
*
* @return string
*/
public function getComment()
{
return $this->comment;
}
/**
* Sets the raw doc comment for this node.
*
* @param string $comment The doc comment block for this node.
*
* @return void
*/
public function setComment($comment)
{
$this->comment = $comment;
}
/**
* The magic sleep method will be called by PHP's runtime environment right
* before an instance of this class gets serialized. It should return an
* array with those property names that should be serialized for this class.
*
* @return array
*
* @since 0.10.0
*/
public function __sleep()
{
return array(
'comment',
'metadata',
'nodes'
);
}
/**
* The magic wakeup method will be called by PHP's runtime environment when
* a previously serialized object gets unserialized. This implementation of
* the wakeup method restores the dependencies between an ast node and the
* node's children.
*
* @return void
*
* @since 0.10.0
*/
public function __wakeup()
{
foreach ($this->nodes as $node) {
$node->setParent($this);
}
}
}