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<?php
declare(strict_types=1);
namespace Doctrine\ORM\Query;
use Doctrine\ORM\AbstractQuery;
/**
* Interface for walkers of DQL ASTs (abstract syntax trees).
*
* @psalm-import-type QueryComponent from Parser
*/
interface TreeWalker
{
/**
* Initializes TreeWalker with important information about the ASTs to be walked.
*
* @psalm-param array<string, QueryComponent> $queryComponents The query components (symbol table).
*/
public function __construct(AbstractQuery $query, ParserResult $parserResult, array $queryComponents);
/**
* Returns internal queryComponents array.
*
* @psalm-return array<string, QueryComponent>
*/
public function getQueryComponents(): array;
/**
* Walks down a SelectStatement AST node.
*/
public function walkSelectStatement(AST\SelectStatement $selectStatement): void;
/**
* Walks down an UpdateStatement AST node.
*/
public function walkUpdateStatement(AST\UpdateStatement $updateStatement): void;
/**
* Walks down a DeleteStatement AST node.
*/
public function walkDeleteStatement(AST\DeleteStatement $deleteStatement): void;
}
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