class Context

Same name in this branch
  1. 9 core/lib/Drupal/Core/Plugin/Context/Context.php \Drupal\Core\Plugin\Context\Context
Same name in other branches
  1. 8.9.x core/lib/Drupal/Core/Plugin/Context/Context.php \Drupal\Core\Plugin\Context\Context
  2. 8.9.x core/lib/Drupal/Component/Plugin/Context/Context.php \Drupal\Component\Plugin\Context\Context
  3. 10 core/lib/Drupal/Core/Plugin/Context/Context.php \Drupal\Core\Plugin\Context\Context
  4. 10 core/lib/Drupal/Component/Plugin/Context/Context.php \Drupal\Component\Plugin\Context\Context
  5. 11.x core/lib/Drupal/Core/Plugin/Context/Context.php \Drupal\Core\Plugin\Context\Context
  6. 11.x core/lib/Drupal/Component/Plugin/Context/Context.php \Drupal\Component\Plugin\Context\Context

A generic context class for wrapping data a plugin needs to operate.

Hierarchy

Expanded class hierarchy of Context

3 files declare their use of Context
Context.php in core/lib/Drupal/Core/Plugin/Context/Context.php
ContextAwarePluginBase.php in core/lib/Drupal/Component/Plugin/ContextAwarePluginBase.php
ContextTest.php in core/tests/Drupal/Tests/Component/Plugin/Context/ContextTest.php
17 string references to 'Context'
ContextualLinkDefaultTest::testGetTitleWithContext in core/tests/Drupal/Tests/Core/Menu/ContextualLinkDefaultTest.php
@covers ::getTitle
drupal7.php in core/modules/aggregator/tests/fixtures/drupal7.php
A database agnostic dump for testing purposes.
drupal7.php in core/modules/migrate_drupal/tests/fixtures/drupal7.php
A database agnostic dump for testing purposes.
EntityTypeTest::testGetCountLabel in core/tests/Drupal/Tests/Core/Entity/EntityTypeTest.php
@covers ::getCountLabel
EntityTypeTest::testGetCountLabelDefault in core/tests/Drupal/Tests/Core/Entity/EntityTypeTest.php
@covers ::getCountLabel

... See full list

File

core/lib/Drupal/Component/Plugin/Context/Context.php, line 12

Namespace

Drupal\Component\Plugin\Context
View source
class Context implements ContextInterface {
    
    /**
     * The value of the context.
     *
     * @var mixed
     */
    protected $contextValue;
    
    /**
     * The definition to which a context must conform.
     *
     * @var \Drupal\Component\Plugin\Context\ContextDefinitionInterface
     */
    protected $contextDefinition;
    
    /**
     * Create a context object.
     *
     * @param \Drupal\Component\Plugin\Context\ContextDefinitionInterface $context_definition
     *   The context definition.
     * @param mixed|null $context_value
     *   The value of the context.
     */
    public function __construct(ContextDefinitionInterface $context_definition, $context_value = NULL) {
        $this->contextDefinition = $context_definition;
        $this->contextValue = $context_value;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getContextValue() {
        // Support optional contexts.
        if (!isset($this->contextValue)) {
            $definition = $this->getContextDefinition();
            $default_value = $definition->getDefaultValue();
            if (!isset($default_value) && $definition->isRequired()) {
                $type = $definition->getDataType();
                throw new ContextException(sprintf("The %s context is required and not present.", $type));
            }
            // Keep the default value here so that subsequent calls don't have to look
            // it up again.
            $this->contextValue = $default_value;
        }
        return $this->contextValue;
    }
    
    /**
     * {@inheritdoc}
     */
    public function hasContextValue() {
        return $this->contextValue !== NULL || $this->getContextDefinition()
            ->getDefaultValue() !== NULL;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getContextDefinition() {
        return $this->contextDefinition;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getConstraints() {
        if (empty($this->contextDefinition['class'])) {
            throw new ContextException("An error was encountered while trying to validate the context.");
        }
        return [
            new Type($this->contextDefinition['class']),
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function validate() {
        $validator = Validation::createValidatorBuilder()->getValidator();
        return $validator->validateValue($this->getContextValue(), $this->getConstraints());
    }

}

Members

Title Sort descending Modifiers Object type Summary Overriden Title Overrides
Context::$contextDefinition protected property The definition to which a context must conform. 1
Context::$contextValue protected property The value of the context.
Context::getConstraints public function Gets a list of validation constraints. Overrides ContextInterface::getConstraints 1
Context::getContextDefinition public function Gets the provided definition that the context must conform to. Overrides ContextInterface::getContextDefinition 1
Context::getContextValue public function Gets the context value. Overrides ContextInterface::getContextValue 1
Context::hasContextValue public function Returns whether the context has a value. Overrides ContextInterface::hasContextValue 1
Context::validate public function Validates the set context value. Overrides ContextInterface::validate 1
Context::__construct public function Create a context object. 1

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