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<?php
declare(strict_types=1);
namespace Doctrine\ORM\Query\AST;
use Doctrine\ORM\Query\SqlWalker;
use Stringable;
use function get_debug_type;
use function get_object_vars;
use function is_array;
use function is_object;
use function str_repeat;
use function var_export;
use const PHP_EOL;
/**
* Abstract class of an AST node.
*
* @link www.doctrine-project.org
*/
abstract class Node implements Stringable
{
/**
* Double-dispatch method, supposed to dispatch back to the walker.
*
* Implementation is not mandatory for all nodes.
*
* @throws ASTException
*/
public function dispatch(SqlWalker $walker): string
{
throw ASTException::noDispatchForNode($this);
}
/**
* Dumps the AST Node into a string representation for information purpose only.
*/
public function __toString(): string
{
return $this->dump($this);
}
public function dump(mixed $value): string
{
static $ident = 0;
$str = '';
if ($value instanceof Node) {
$str .= get_debug_type($value) . '(' . PHP_EOL;
$props = get_object_vars($value);
foreach ($props as $name => $prop) {
$ident += 4;
$str .= str_repeat(' ', $ident) . '"' . $name . '": '
. $this->dump($prop) . ',' . PHP_EOL;
$ident -= 4;
}
$str .= str_repeat(' ', $ident) . ')';
} elseif (is_array($value)) {
$ident += 4;
$str .= 'array(';
$some = false;
foreach ($value as $k => $v) {
$str .= PHP_EOL . str_repeat(' ', $ident) . '"'
. $k . '" => ' . $this->dump($v) . ',';
$some = true;
}
$ident -= 4;
$str .= ($some ? PHP_EOL . str_repeat(' ', $ident) : '') . ')';
} elseif (is_object($value)) {
$str .= 'instanceof(' . get_debug_type($value) . ')';
} else {
$str .= var_export($value, true);
}
return $str;
}
}
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