Version 1

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

diff --git a/web/core/lib/Drupal/Core/TypedData/DataReferenceBase.php b/web/core/lib/Drupal/Core/TypedData/DataReferenceBase.php
new file mode 100644 (file)
index 0000000..a41b01c
--- /dev/null
+++ b/web/core/lib/Drupal/Core/TypedData/DataReferenceBase.php
@@ -0,0 +1,60 @@
+<?php
+
+namespace Drupal\Core\TypedData;
+
+/**
+ * Base class for typed data references.
+ *
+ * Data types based on this base class need to be named
+ * "{TARGET_TYPE}_reference", whereas {TARGET_TYPE} is the referenced data type.
+ * For example, an entity reference data type would have to be named
+ * "entity_reference".
+ * Beside that, implementing classes have to implement at least
+ * \Drupal\Core\TypedData\DataReferenceInterface::getTargetIdentifier().
+ *
+ * @see \Drupal\Core\TypedData\DataReferenceDefinition
+ */
+abstract class DataReferenceBase extends TypedData implements DataReferenceInterface {
+
+  /**
+   * The referenced data.
+   *
+   * @var \Drupal\Core\TypedData\TypedDataInterface
+   */
+  protected $target;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getTarget() {
+    return $this->target;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getValue() {
+    if ($target = $this->getTarget()) {
+      return $target->getValue();
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setValue($value, $notify = TRUE) {
+    $this->target = $this->getTypedDataManager()->create($this->definition->getTargetDefinition(), $value);
+    // Notify the parent of any changes.
+    if ($notify && isset($this->parent)) {
+      $this->parent->onChange($this->name);
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getString() {
+    return (string) $this->getType() . ':' . $this->getTargetIdentifier();
+  }
+
+}