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vendor/gedmo/doctrine-extensions/lib/Gedmo/ReferenceIntegrity/ReferenceIntegrity.php

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+<?php
+
+namespace Gedmo\ReferenceIntegrity;
+
+/**
+ * This interface is not necessary but can be implemented for
+ * Entities which in some cases needs to be identified te have
+ * ReferenceIntegrity checks
+ *
+ * @author Evert Harmeling <evert.harmeling@freshheads.com>
+ * @license MIT License (http://www.opensource.org/licenses/mit-license.php)
+ */
+interface ReferenceIntegrity
+{
+    /**
+     * ReferenceIntegrity expects certain settings to be required
+     * in combination with an association
+     */
+
+    /**
+     * example
+     * @ODM\ReferenceOne(targetDocument="Article", nullable="true", mappedBy="type")
+     * @Gedmo\ReferenceIntegrity("nullify")
+     * @var Article
+     */
+
+    /**
+     * example
+     * @ODM\ReferenceOne(targetDocument="Article", nullable="true", mappedBy="type")
+     * @Gedmo\ReferenceIntegrity("restrict")
+     * @var Article
+     */
+
+    /**
+     * example
+     * @ODM\ReferenceMany(targetDocument="Article", nullable="true", mappedBy="type")
+     * @Gedmo\ReferenceIntegrity("nullify")
+     * @var Doctrine\Common\Collections\ArrayCollection
+     */
+
+    /**
+     * example
+     * @ODM\ReferenceMany(targetDocument="Article", nullable="true", mappedBy="type")
+     * @Gedmo\ReferenceIntegrity("restrict")
+     * @var Doctrine\Common\Collections\ArrayCollection
+     */
+}