Disallow empty CompositeExpression

lib/Doctrine/DBAL/Query/Expression/CompositeExpression.php

@@ -5,9 +5,7 @@ declare(strict_types=1);
 namespace Doctrine\DBAL\Query\Expression;
 
 use Countable;
-use function array_filter;
 use function array_merge;
-use function array_values;
 use function count;
 use function implode;
 
@@ -38,22 +36,20 @@ class CompositeExpression implements Countable
     /**
      * Each expression part of the composite expression.
      *
-     * @var self[]|string[]
+     * @var array<int, self|string>
      */
     private $parts = [];
 
     /**
      * @internal Use the and() / or() factory methods.
      *
-     * @param string          $type  Instance type of composite expression.
-     * @param self[]|string[] $parts Composition of expressions to be joined on composite expression.
+     * @param self|string $part
+     * @param self|string ...$parts
      */
-    public function __construct(string $type, array $parts = [])
+    public function __construct(string $type, $part, ...$parts)
     {
         $this->type  = $type;
-        $this->parts = array_values(array_filter($parts, static function ($part) {
-            return ! ($part instanceof self && count($part) === 0);
-        }));
+        $this->parts = array_merge([$part], $parts);
     }
 
     /**
@@ -62,7 +58,7 @@ class CompositeExpression implements Countable
      */
     public static function and($part, ...$parts) : self
     {
-        return new self(self::TYPE_AND, array_merge([$part], $parts));
+        return new self(self::TYPE_AND, $part, ...$parts);
     }
 
     /**
@@ -71,7 +67,7 @@ class CompositeExpression implements Countable
      */
     public static function or($part, ...$parts) : self
     {
-        return new self(self::TYPE_OR, array_merge([$part], $parts));
+        return new self(self::TYPE_OR, $part, ...$parts);
     }
 
     /**

lib/Doctrine/DBAL/Query/QueryBuilder.php

@@ -1025,7 +1025,7 @@ class QueryBuilder
             return $predicate;
         }
 
-        return new CompositeExpression(CompositeExpression::TYPE_AND, array_merge([$predicate], $predicates));
+        return new CompositeExpression(CompositeExpression::TYPE_AND, $predicate, ...$predicates);
     }
 
     /**
@@ -1048,7 +1048,7 @@ class QueryBuilder
             return $predicates[0];
         }
 
-        return new CompositeExpression($type, $predicates);
+        return new CompositeExpression($type, ...$predicates);
     }
 
     /**

tests/Doctrine/Tests/DBAL/Query/Expression/CompositeExpressionTest.php

@@ -44,14 +44,10 @@ class CompositeExpressionTest extends DbalTestCase
     }
 
     /**
-     * @param string[]|CompositeExpression[] $parts
-     *
      * @dataProvider provideDataForConvertToString
      */
-    public function testCompositeUsageAndGeneration(string $type, array $parts, string $expects) : void
+    public function testCompositeUsageAndGeneration(CompositeExpression $expr, string $expects) : void
     {
-        $expr = new CompositeExpression($type, $parts);
-
         self::assertEquals($expects, (string) $expr);
     }
 
@@ -62,45 +58,39 @@ class CompositeExpressionTest extends DbalTestCase
     {
         return [
             [
-                CompositeExpression::TYPE_AND,
-                ['u.user = 1'],
+                CompositeExpression::and('u.user = 1'),
                 'u.user = 1',
             ],
             [
-                CompositeExpression::TYPE_AND,
-                ['u.user = 1', 'u.group_id = 1'],
+                CompositeExpression::and('u.user = 1', 'u.group_id = 1'),
                 '(u.user = 1) AND (u.group_id = 1)',
             ],
             [
-                CompositeExpression::TYPE_OR,
-                ['u.user = 1'],
+                CompositeExpression::or('u.user = 1'),
                 'u.user = 1',
             ],
             [
-                CompositeExpression::TYPE_OR,
-                ['u.group_id = 1', 'u.group_id = 2'],
+                CompositeExpression::or('u.group_id = 1', 'u.group_id = 2'),
                 '(u.group_id = 1) OR (u.group_id = 2)',
             ],
             [
-                CompositeExpression::TYPE_AND,
-                [
+                CompositeExpression::and(
                     'u.user = 1',
                     CompositeExpression::or(
                         'u.group_id = 1',
                         'u.group_id = 2'
-                    ),
-                ],
+                    )
+                ),
                 '(u.user = 1) AND ((u.group_id = 1) OR (u.group_id = 2))',
             ],
             [
-                CompositeExpression::TYPE_OR,
-                [
+                CompositeExpression::or(
                     'u.group_id = 1',
                     CompositeExpression::and(
                         'u.user = 1',
                         'u.group_id = 2'
-                    ),
-                ],
+                    )
+                ),
                 '(u.group_id = 1) OR ((u.user = 1) AND (u.group_id = 2))',
             ],
         ];