class DataIsEmpty in Rules 8.3

Provides a 'Data value is empty' condition.

@Condition( id = "rules_data_is_empty", label = @Translation("Data value is empty"), category = @Translation("Data"), context_definitions = { "data" = @ContextDefinition("any", label = @Translation("Data to check"), description = @Translation("The data to be checked to be empty, specified by using a data selector, e.g. 'node.uid.entity.name.value'."), assignment_restriction = "selector" ), } )

@todo Add access callback information from Drupal 7.

Hierarchy

• class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
  • class \Drupal\Component\Plugin\ContextAwarePluginBase implements ContextAwarePluginInterface
    • class \Drupal\Core\Plugin\ContextAwarePluginBase implements CacheableDependencyInterface, ContextAwarePluginInterface uses DependencySerializationTrait, StringTranslationTrait, TypedDataTrait
      • class \Drupal\Core\Executable\ExecutablePluginBase implements ExecutableInterface
        • class \Drupal\Core\Condition\ConditionPluginBase implements ConditionInterface uses ContextAwarePluginAssignmentTrait
          • class \Drupal\rules\Core\RulesConditionBase implements RulesConditionInterface uses ContextProviderTrait, ConfigurationAccessControlTrait, ExecutablePluginTrait
            • class \Drupal\rules\Plugin\Condition\DataIsEmpty

File

src/Plugin/Condition/DataIsEmpty.php, line 30

Namespace

Drupal\rules\Plugin\Condition

class DataIsEmpty extends RulesConditionBase {

  /**
   * {@inheritdoc}
   */
  public function evaluate() {
    $data = $this
      ->getContext('data')
      ->getContextData();
    if ($data instanceof ComplexDataInterface || $data instanceof ListInterface) {
      return $data
        ->isEmpty();
    }
    $value = $data
      ->getValue();

    // For some primitives we can rely on PHP's type casting to boolean.
    if ($data instanceof StringInterface || $data instanceof IntegerInterface || $data instanceof BooleanInterface) {
      return !isset($value) || !$value;
    }
    return !isset($value);
  }

}

Members

Name	Modifiers	Type	Description	Overrides
ConditionPluginBase::$executableManager	protected	property	The condition manager to proxy execute calls through.
ConditionPluginBase::buildConfigurationForm	public	function	Form constructor. Overrides PluginFormInterface::buildConfigurationForm	5
ConditionPluginBase::calculateDependencies	public	function	Calculates dependencies for the configured plugin. Overrides DependentPluginInterface::calculateDependencies
ConditionPluginBase::defaultConfiguration	public	function	Gets default configuration for this plugin. Overrides ConfigurableInterface::defaultConfiguration	5
ConditionPluginBase::execute	public	function	Executes the plugin. Overrides ExecutableInterface::execute
ConditionPluginBase::getConfiguration	public	function	Gets this plugin's configuration. Overrides ConfigurableInterface::getConfiguration
ConditionPluginBase::isNegated	public	function	Determines whether condition result will be negated. Overrides ConditionInterface::isNegated
ConditionPluginBase::setConfiguration	public	function	Sets the configuration for this plugin instance. Overrides ConfigurableInterface::setConfiguration
ConditionPluginBase::setExecutableManager	public	function	Sets the executable manager class. Overrides ConditionInterface::setExecutableManager
ConditionPluginBase::submitConfigurationForm	public	function	Form submission handler. Overrides PluginFormInterface::submitConfigurationForm	5
ConditionPluginBase::validateConfigurationForm	public	function	Form validation handler. Overrides PluginFormInterface::validateConfigurationForm
ConditionPluginBase::__construct	public	function	Overrides \Drupal\Component\Plugin\PluginBase::__construct(). Overrides ContextAwarePluginBase::__construct	4
ConfigurationAccessControlTrait::checkConfigurationAccess	public	function	Checks configuration permission.
ContextAwarePluginAssignmentTrait::addContextAssignmentElement	protected	function	Builds a form element for assigning a context to a given slot.
ContextAwarePluginAssignmentTrait::contextHandler	protected	function	Wraps the context handler.
ContextAwarePluginAssignmentTrait::t	abstract protected	function	Ensures the t() method is available.
ContextAwarePluginBase::$context	protected	property	The data objects representing the context of this plugin.
ContextAwarePluginBase::$contexts Deprecated	private	property	Data objects representing the contexts passed in the plugin configuration.
ContextAwarePluginBase::createContextFromConfiguration	protected	function	Overrides ContextAwarePluginBase::createContextFromConfiguration
ContextAwarePluginBase::getCacheContexts	public	function	The cache contexts associated with this object. Overrides CacheableDependencyInterface::getCacheContexts	9
ContextAwarePluginBase::getCacheMaxAge	public	function	The maximum age for which this object may be cached. Overrides CacheableDependencyInterface::getCacheMaxAge	7
ContextAwarePluginBase::getCacheTags	public	function	The cache tags associated with this object. Overrides CacheableDependencyInterface::getCacheTags	4
ContextAwarePluginBase::getContext	public	function	This code is identical to the Component in order to pick up a different Context class. Overrides ContextAwarePluginBase::getContext
ContextAwarePluginBase::getContextDefinition	public	function	Overrides ContextAwarePluginBase::getContextDefinition
ContextAwarePluginBase::getContextDefinitions	public	function	Overrides ContextAwarePluginBase::getContextDefinitions
ContextAwarePluginBase::getContextMapping	public	function	Gets a mapping of the expected assignment names to their context names. Overrides ContextAwarePluginInterface::getContextMapping
ContextAwarePluginBase::getContexts	public	function	Gets the defined contexts. Overrides ContextAwarePluginInterface::getContexts
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 ContextAwarePluginBase::setContext
ContextAwarePluginBase::setContextMapping	public	function	Sets a mapping of the expected assignment names to their context names. Overrides ContextAwarePluginInterface::setContextMapping
ContextAwarePluginBase::setContextValue	public	function	Sets the value for a defined context. Overrides ContextAwarePluginBase::setContextValue
ContextAwarePluginBase::validateContexts	public	function	Validates the set values for the defined contexts. Overrides ContextAwarePluginInterface::validateContexts
ContextAwarePluginBase::__get	public	function	Implements magic __get() method.
ContextProviderTrait::$providedContext	protected	property	The data objects that are provided by this plugin.
ContextProviderTrait::getProvidedContext	public	function
ContextProviderTrait::getProvidedContextDefinition	public	function
ContextProviderTrait::getProvidedContextDefinitions	public	function
ContextProviderTrait::setProvidedValue	public	function
DataIsEmpty::evaluate	public	function	Evaluates the condition and returns TRUE or FALSE accordingly. Overrides RulesConditionBase::evaluate
DependencySerializationTrait::$_entityStorages	protected	property	An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds	protected	property	An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep	public	function		1
DependencySerializationTrait::__wakeup	public	function		2
ExecutablePluginBase::getConfig	public	function	Gets all configuration values.
ExecutablePluginBase::getConfigDefinition	public	function	Gets the definition of a configuration option.
ExecutablePluginBase::getConfigDefinitions	public	function	Gets an array of definitions of available configuration options.
ExecutablePluginBase::setConfig	public	function	Sets the value of a particular configuration option.
ExecutablePluginTrait::getLabelValue	protected	function	Get the translated label from the plugin definition.
ExecutablePluginTrait::summary	public	function	Get the translated summary from the label annotation.	4
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.	1
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.	1
PluginBase::$pluginId	protected	property	The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId	public	function	Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId	public	function	Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition	public	function	Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition	3
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
RulesConditionBase::assertMetadata	public	function	Asserts additional metadata for the selected data. Overrides ContextAwarePluginInterface::assertMetadata	1
RulesConditionBase::getContextValue	public	function	Gets the value for a defined context. Overrides ContextAwarePluginBase::getContextValue
RulesConditionBase::negate	public	function	Negates the result after evaluating this condition. Overrides RulesConditionInterface::negate
RulesConditionBase::refineContextDefinitions	public	function	Refines used and provided context definitions based upon context values. Overrides ContextAwarePluginInterface::refineContextDefinitions	1
StringTranslationTrait::$stringTranslation	protected	property	The string translation service.	1
StringTranslationTrait::formatPlural	protected	function	Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals	protected	function	Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation	protected	function	Gets the string translation service.
StringTranslationTrait::setStringTranslation	public	function	Sets the string translation service to use.	2
TypedDataTrait::$typedDataManager	protected	property	The typed data manager used for creating the data types.
TypedDataTrait::getTypedDataManager	public	function	Gets the typed data manager.	2
TypedDataTrait::setTypedDataManager	public	function	Sets the typed data manager.	2