Version 1

[yaffs-website] / web / core / lib / Drupal / Core / TypedData / DataReferenceDefinition.php

diff --git a/web/core/lib/Drupal/Core/TypedData/DataReferenceDefinition.php b/web/core/lib/Drupal/Core/TypedData/DataReferenceDefinition.php
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index 0000000..3a2a668
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+++ b/web/core/lib/Drupal/Core/TypedData/DataReferenceDefinition.php
@@ -0,0 +1,65 @@
+<?php
+
+namespace Drupal\Core\TypedData;
+
+/**
+ * A typed data definition class for defining references.
+ *
+ * Note that this definition class assumes that the data type for referencing
+ * a certain target type is named "{TARGET_TYPE}_reference".
+ *
+ * @see \Drupal\Core\TypedData\DataReferenceBase
+ */
+class DataReferenceDefinition extends DataDefinition implements DataReferenceDefinitionInterface {
+
+  /**
+   * @var \Drupal\Core\TypedData\DataDefinitionInterface
+   */
+  protected $targetDefinition;
+
+  /**
+   * Creates a new data reference definition.
+   *
+   * @param string $target_data_type
+   *   The data type of the referenced data.
+   *
+   * @return static
+   */
+  public static function create($target_data_type) {
+    // This assumes implementations use a "TYPE_reference" naming pattern.
+    $definition = parent::create($target_data_type . '_reference');
+    return $definition->setTargetDefinition(\Drupal::typedDataManager()->createDataDefinition($target_data_type));
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function createFromDataType($data_type) {
+    if (substr($data_type, -strlen('_reference')) != '_reference') {
+      throw new \InvalidArgumentException('Data type must be of the form "{TARGET_TYPE}_reference"');
+    }
+    // Cut of the _reference suffix.
+    return static::create(substr($data_type, 0, strlen($data_type) - strlen('_reference')));
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getTargetDefinition() {
+    return $this->targetDefinition;
+  }
+
+  /**
+   * Sets the definition of the referenced data.
+   *
+   * @param \Drupal\Core\TypedData\DataDefinitionInterface $definition
+   *   The target definition to set.
+   *
+   * @return $this
+   */
+  public function setTargetDefinition(DataDefinitionInterface $definition) {
+    $this->targetDefinition = $definition;
+    return $this;
+  }
+
+}