abstract class ContextAwarePluginBase in Plug 7

Base class for plugins that are context aware.

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abstract class ContextAwarePluginBase extends PluginBase implements ContextAwarePluginInterface {

  /**
   * The data objects representing the context of this plugin.
   *
   * @var \Drupal\Component\Plugin\Context\ContextInterface[]
   */
  protected $context = [];

  /**
   * Overrides \Drupal\Component\Plugin\PluginBase::__construct().
   *
   * Overrides the construction of context aware plugins to allow for
   * unvalidated constructor based injection of contexts.
   *
   * @param array $configuration
   *   The plugin configuration, i.e. an array with configuration values keyed
   *   by configuration option name. The special key 'context' may be used to
   *   initialize the defined contexts by setting it to an array of context
   *   values keyed by context names.
   * @param string $plugin_id
   *   The plugin_id for the plugin instance.
   * @param mixed $plugin_definition
   *   The plugin implementation definition.
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition) {
    $context_configuration = isset($configuration['context']) ? $configuration['context'] : [];
    unset($configuration['context']);
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->contexts = $this
      ->createContextFromConfiguration($context_configuration);
  }

  /**
   * Creates context objects from any context mappings in configuration.
   *
   * @param array $context_configuration
   *   An associative array of context names and values.
   *
   * @return \Drupal\Component\Plugin\Context\ContextInterface[]
   *   An array of context objects.
   */
  protected function createContextFromConfiguration(array $context_configuration) {
    $contexts = [];
    foreach ($context_configuration as $key => $value) {
      $context_definition = $this
        ->getContextDefinition($key);
      $contexts[$key] = new Context($context_definition, $value);
    }
    return $contexts;
  }

  /**
   * {@inheritdoc}
   */
  public function getContextDefinitions() {
    $definition = $this
      ->getPluginDefinition();
    return !empty($definition['context']) ? $definition['context'] : array();
  }

  /**
   * {@inheritdoc}
   */
  public function getContextDefinition($name) {
    $definition = $this
      ->getPluginDefinition();
    if (empty($definition['context'][$name])) {
      throw new ContextException(sprintf("The %s context is not a valid context.", $name));
    }
    return $definition['context'][$name];
  }

  /**
   * {@inheritdoc}
   */
  public function getContexts() {

    // Make sure all context objects are initialized.
    foreach ($this
      ->getContextDefinitions() as $name => $definition) {
      $this
        ->getContext($name);
    }
    return $this->context;
  }

  /**
   * {@inheritdoc}
   */
  public function getContext($name) {

    // Check for a valid context value.
    if (!isset($this->context[$name])) {
      $this->context[$name] = new Context($this
        ->getContextDefinition($name));
    }
    return $this->context[$name];
  }

  /**
   * {@inheritdoc}
   */
  public function setContext($name, ContextInterface $context) {
    $this->context[$name] = $context;
  }

  /**
   * {@inheritdoc}
   */
  public function getContextValues() {
    $values = array();
    foreach ($this
      ->getContextDefinitions() as $name => $definition) {
      $values[$name] = isset($this->context[$name]) ? $this->context[$name]
        ->getContextValue() : NULL;
    }
    return $values;
  }

  /**
   * {@inheritdoc}
   */
  public function getContextValue($name) {
    return $this
      ->getContext($name)
      ->getContextValue();
  }

  /**
   * {@inheritdoc}
   */
  public function setContextValue($name, $value) {
    $this->context[$name] = new Context($this
      ->getContextDefinition($name), $value);
    return $this;
  }

  /**
   * {@inheritdoc}
   */
  public function validateContexts() {
    $violations = new ConstraintViolationList();

    // @todo: Implement symfony validator API to let the validator traverse
    // and set property paths accordingly.
    foreach ($this
      ->getContexts() as $context) {
      $violations
        ->addAll($context
        ->validate());
    }
    return $violations;
  }

}

Members

Name	Modifiers	Type	Description
ContextAwarePluginBase::$context	protected	property	The data objects representing the context of this plugin.
ContextAwarePluginBase::createContextFromConfiguration	protected	function	Creates context objects from any context mappings in configuration.
ContextAwarePluginBase::getContext	public	function	Gets a defined context. Overrides ContextAwarePluginInterface::getContext
ContextAwarePluginBase::getContextDefinition	public	function	Gets a specific context definition of the plugin. Overrides ContextAwarePluginInterface::getContextDefinition
ContextAwarePluginBase::getContextDefinitions	public	function	Gets the context definitions of the plugin. Overrides ContextAwarePluginInterface::getContextDefinitions
ContextAwarePluginBase::getContexts	public	function	Gets the defined contexts. Overrides ContextAwarePluginInterface::getContexts
ContextAwarePluginBase::getContextValue	public	function	Gets the value for a defined context. Overrides ContextAwarePluginInterface::getContextValue
ContextAwarePluginBase::getContextValues	public	function	Gets the values for all defined contexts. Overrides ContextAwarePluginInterface::getContextValues
ContextAwarePluginBase::setContext	public	function	Set a context on this plugin. Overrides ContextAwarePluginInterface::setContext
ContextAwarePluginBase::setContextValue	public	function	Sets the value for a defined context. Overrides ContextAwarePluginInterface::setContextValue
ContextAwarePluginBase::validateContexts	public	function	Validates the set values for the defined contexts. Overrides ContextAwarePluginInterface::validateContexts
ContextAwarePluginBase::__construct	public	function	Overrides \Drupal\Component\Plugin\PluginBase::__construct(). Overrides PluginBase::__construct
ContextAwarePluginInterface::getContextMapping	public	function	Gets a mapping of the expected assignment names to their context names.
ContextAwarePluginInterface::setContextMapping	public	function	Sets a mapping of the expected assignment names to their context names.
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.
PluginBase::$pluginId	protected	property	The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId	public	function	Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId	public	function	Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition	public	function	Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId

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abstract class ContextAwarePluginBase in Plug 7

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