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<?php
declare(strict_types=1);
namespace Doctrine\DBAL\Query\Expression;
use Doctrine\DBAL\Connection;
use function implode;
use function sprintf;
/**
* ExpressionBuilder class is responsible to dynamically create SQL query parts.
*/
class ExpressionBuilder
{
final public const EQ = '=';
final public const NEQ = '<>';
final public const LT = '<';
final public const LTE = '<=';
final public const GT = '>';
final public const GTE = '>=';
/**
* Initializes a new <tt>ExpressionBuilder</tt>.
*
* @param Connection $connection The DBAL Connection.
*/
public function __construct(private readonly Connection $connection)
{
}
/**
* Creates a conjunction of the given expressions.
*/
public function and(
string|CompositeExpression $expression,
string|CompositeExpression ...$expressions,
): CompositeExpression {
return CompositeExpression::and($expression, ...$expressions);
}
/**
* Creates a disjunction of the given expressions.
*/
public function or(
string|CompositeExpression $expression,
string|CompositeExpression ...$expressions,
): CompositeExpression {
return CompositeExpression::or($expression, ...$expressions);
}
/**
* Creates a comparison expression.
*
* @param string $x The left expression.
* @param string $operator The comparison operator.
* @param string $y The right expression.
*/
public function comparison(string $x, string $operator, string $y): string
{
return $x . ' ' . $operator . ' ' . $y;
}
/**
* Creates an equality comparison expression with the given arguments.
*
* First argument is considered the left expression and the second is the right expression.
* When converted to string, it will generated a <left expr> = <right expr>. Example:
*
* [php]
* // u.id = ?
* $expr->eq('u.id', '?');
*
* @param string $x The left expression.
* @param string $y The right expression.
*/
public function eq(string $x, string $y): string
{
return $this->comparison($x, self::EQ, $y);
}
/**
* Creates a non equality comparison expression with the given arguments.
* First argument is considered the left expression and the second is the right expression.
* When converted to string, it will generated a <left expr> <> <right expr>. Example:
*
* [php]
* // u.id <> 1
* $q->where($q->expr()->neq('u.id', '1'));
*
* @param string $x The left expression.
* @param string $y The right expression.
*/
public function neq(string $x, string $y): string
{
return $this->comparison($x, self::NEQ, $y);
}
/**
* Creates a lower-than comparison expression with the given arguments.
* First argument is considered the left expression and the second is the right expression.
* When converted to string, it will generated a <left expr> < <right expr>. Example:
*
* [php]
* // u.id < ?
* $q->where($q->expr()->lt('u.id', '?'));
*
* @param string $x The left expression.
* @param string $y The right expression.
*/
public function lt(string $x, string $y): string
{
return $this->comparison($x, self::LT, $y);
}
/**
* Creates a lower-than-equal comparison expression with the given arguments.
* First argument is considered the left expression and the second is the right expression.
* When converted to string, it will generated a <left expr> <= <right expr>. Example:
*
* [php]
* // u.id <= ?
* $q->where($q->expr()->lte('u.id', '?'));
*
* @param string $x The left expression.
* @param string $y The right expression.
*/
public function lte(string $x, string $y): string
{
return $this->comparison($x, self::LTE, $y);
}
/**
* Creates a greater-than comparison expression with the given arguments.
* First argument is considered the left expression and the second is the right expression.
* When converted to string, it will generated a <left expr> > <right expr>. Example:
*
* [php]
* // u.id > ?
* $q->where($q->expr()->gt('u.id', '?'));
*
* @param string $x The left expression.
* @param string $y The right expression.
*/
public function gt(string $x, string $y): string
{
return $this->comparison($x, self::GT, $y);
}
/**
* Creates a greater-than-equal comparison expression with the given arguments.
* First argument is considered the left expression and the second is the right expression.
* When converted to string, it will generated a <left expr> >= <right expr>. Example:
*
* [php]
* // u.id >= ?
* $q->where($q->expr()->gte('u.id', '?'));
*
* @param string $x The left expression.
* @param string $y The right expression.
*/
public function gte(string $x, string $y): string
{
return $this->comparison($x, self::GTE, $y);
}
/**
* Creates an IS NULL expression with the given arguments.
*
* @param string $x The expression to be restricted by IS NULL.
*/
public function isNull(string $x): string
{
return $x . ' IS NULL';
}
/**
* Creates an IS NOT NULL expression with the given arguments.
*
* @param string $x The expression to be restricted by IS NOT NULL.
*/
public function isNotNull(string $x): string
{
return $x . ' IS NOT NULL';
}
/**
* Creates a LIKE comparison expression.
*
* @param string $expression The expression to be inspected by the LIKE comparison
* @param string $pattern The pattern to compare against
*/
public function like(string $expression, string $pattern, ?string $escapeChar = null): string
{
return $this->comparison($expression, 'LIKE', $pattern) .
($escapeChar !== null ? sprintf(' ESCAPE %s', $escapeChar) : '');
}
/**
* Creates a NOT LIKE comparison expression
*
* @param string $expression The expression to be inspected by the NOT LIKE comparison
* @param string $pattern The pattern to compare against
*/
public function notLike(string $expression, string $pattern, ?string $escapeChar = null): string
{
return $this->comparison($expression, 'NOT LIKE', $pattern) .
($escapeChar !== null ? sprintf(' ESCAPE %s', $escapeChar) : '');
}
/**
* Creates an IN () comparison expression with the given arguments.
*
* @param string $x The SQL expression to be matched against the set.
* @param string|string[] $y The SQL expression or an array of SQL expressions representing the set.
*/
public function in(string $x, string|array $y): string
{
return $this->comparison($x, 'IN', '(' . implode(', ', (array) $y) . ')');
}
/**
* Creates a NOT IN () comparison expression with the given arguments.
*
* @param string $x The SQL expression to be matched against the set.
* @param string|string[] $y The SQL expression or an array of SQL expressions representing the set.
*/
public function notIn(string $x, string|array $y): string
{
return $this->comparison($x, 'NOT IN', '(' . implode(', ', (array) $y) . ')');
}
/**
* Creates an SQL literal expression from the string.
*
* The usage of this method is discouraged. Use prepared statements
* or {@see AbstractPlatform::quoteStringLiteral()} instead.
*/
public function literal(string $input): string
{
return $this->connection->quote($input);
}
}
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