Adds an expression object.

Parameters

\Drupal\rules\Engine\ExpressionInterface $expression: The expression object.

Return value

$this

Overrides ExpressionContainerInterface::addExpressionObject

1 call to ConditionExpressionContainer::addExpressionObject()

ConditionExpressionContainer::addCondition in src/Engine/ConditionExpressionContainer.php

Creates a condition expression and adds it to the container.

File

src/Engine/ConditionExpressionContainer.php, line 52

Class

ConditionExpressionContainer

Container for conditions.

Namespace

Drupal\rules\Engine

Code

public function addExpressionObject(ExpressionInterface $expression) {
  if (!$expression instanceof ConditionExpressionInterface) {
    throw new InvalidExpressionException('Only condition expressions can be added to a condition container.');
  }
  $uuid = $expression->getUuid();
  if ($this->getExpression($uuid)) {
    throw new InvalidExpressionException("A condition with UUID {$uuid} already exists in the container.");
  }
  $this->conditions[] = $expression;
  return $this;
}