From 267ce7df889eb971e2e27e260ce03b110ce1f7a3 Mon Sep 17 00:00:00 2001
From: Benjamin Eberlei <kontakt@beberlei.de>
Date: Sat, 17 Dec 2011 19:35:10 +0100
Subject: [PATCH] DDC-1544 - Add ResolveTargetEntityListener

---
 .../ORM/Tools/ResolveTargetEntityListener.php | 92 +++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 lib/Doctrine/ORM/Tools/ResolveTargetEntityListener.php

diff --git a/lib/Doctrine/ORM/Tools/ResolveTargetEntityListener.php b/lib/Doctrine/ORM/Tools/ResolveTargetEntityListener.php
new file mode 100644
index 000000000..6151763da
--- /dev/null
+++ b/lib/Doctrine/ORM/Tools/ResolveTargetEntityListener.php
@@ -0,0 +1,92 @@
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the LGPL. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\ORM\Tools;
+
+use Doctrine\ORM\Events\LoadClassMetadataEventArgs;
+
+/**
+ * ResolveTargetEntityListener
+ *
+ * Mechanism to overwrite interfaces or classes specified as association
+ * targets.
+ *
+ * @author Benjamin Eberlei <kontakt@beberlei.de>
+ * @since 2.2
+ */
+class ResolveTargetEntityListener
+{
+    /**
+     * @var array
+     */
+    private $resolveTargetEntities = array();
+
+    /**
+     * Add a target-entity class name to resolve to a new class name.
+     *
+     * @param string $originalEntity
+     * @param string $newEntity
+     * @param array $mapping
+     * @return void
+     */
+    public function addResolveTargetEntity($originalEntity, $newEntity, array $mapping)
+    {
+        $mapping['targetEntity'] = ltrim($newEntity, "\\");
+        $this->resolveTargetEntities[ltrim($originalEntity, "\\")] = $mapping;
+    }
+
+    /**
+     * Process event and resolve new target entity names.
+     *
+     * @param LoadClassMetadataEventArgs $args
+     * @return void
+     */
+    public function loadClassMetadata(LoadClassMetadataEventArgs $args)
+    {
+        $cm = $args->getClassMetadata();
+        foreach ($cm->associationMappings as $assocName => $mapping) {
+            if (isset($this->resolveTargetEntities[$mapping['targetEntity']])) {
+                $this->remapAssociation($cm, $mapping);
+            }
+        }
+    }
+
+    private function remapAssocation($classMetadata, $mapping)
+    {
+        $newMapping = $this->resolveTargetEntities[$mapping['targetEntity']];
+        $newMapping['fieldName'] = $mapping['fieldName'];
+        unset($cm->associationMappings[$mapping['fieldName']]);
+
+        switch ($mapping['type']) {
+            case ClassMetadata::MANY_TO_MANY:
+                $cm->mapManyToMany($newMapping);
+                break;
+            case ClassMetadata::MANY_TO_ONE:
+                $cm->mapManyToOne($newMapping);
+                break;
+            case ClassMetadata::ONE_TO_MANY:
+                $cm->mapOneToMany($newMapping);
+                break;
+            case ClassMetadata::ONE_TO_ONE:
+                $cm->mapOneToOne($newMapping);
+                break;
+        }
+    }
+}
+