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| <?php | |
| // Copyright (c) Lellys Informática. All rights reserved. See License.txt in the project root for license information. | |
| namespace Easy\Collections\Linq\Expr; | |
| /** | |
| * Expression of Expressions combined by AND or OR operation. | |
| * | |
| * @author Benjamin Eberlei <kontakt@beberlei.de> | |
| * @since 2.3 | |
| */ | |
| class CompositeExpression implements Expression | |
| { | |
| const TYPE_AND = 'AND'; | |
| const TYPE_OR = 'OR'; | |
| /** | |
| * @var string | |
| */ | |
| private $type; | |
| /** | |
| * @var Expression[] | |
| */ | |
| private $expressions = array(); | |
| /** | |
| * @param string $type | |
| * @param array $expressions | |
| * | |
| * @throws \RuntimeException | |
| */ | |
| public function __construct($type, array $expressions) | |
| { | |
| $this->type = $type; | |
| foreach ($expressions as $expr) { | |
| if ($expr instanceof Value) { | |
| throw new \RuntimeException("Values are not supported expressions as children of and/or expressions."); | |
| } | |
| if (!($expr instanceof Expression)) { | |
| throw new \RuntimeException("No expression given to CompositeExpression."); | |
| } | |
| $this->expressions[] = $expr; | |
| } | |
| } | |
| /** | |
| * Returns the list of expressions nested in this composite. | |
| * | |
| * @return Expression[] | |
| */ | |
| public function getExpressionList() | |
| { | |
| return $this->expressions; | |
| } | |
| /** | |
| * @return string | |
| */ | |
| public function getType() | |
| { | |
| return $this->type; | |
| } | |
| /** | |
| * {@inheritDoc} | |
| */ | |
| public function visit(ExpressionVisitor $visitor) | |
| { | |
| return $visitor->walkCompositeExpression($this); | |
| } | |