From 6c942435b52ab7f79ead3342e79154aab5e133bc Mon Sep 17 00:00:00 2001
From: bchambers <bchambers@google.com>
Date: Wed, 18 May 2016 17:20:18 -0700
Subject: [PATCH] Add a compatibility stub of GABWViaWindowSetDoFn

Direct calls to
`org.apache.beam.sdk.util.GroupAlsoByWindowViaWindowSetDoFn#create`
failed following the rename in 892ead2c.

This re-introduces that method as a redirect to the new name to
unbreak things while waiting for a complete fix.
---
 runners/google-cloud-dataflow-java/pom.xml    |  5 +++
 .../GroupAlsoByWindowViaWindowSetDoFn.java    | 40 +++++++++++++++++++
 2 files changed, 45 insertions(+)
 create mode 100644 runners/google-cloud-dataflow-java/src/main/java/org/apache/beam/sdk/util/GroupAlsoByWindowViaWindowSetDoFn.java

diff --git a/runners/google-cloud-dataflow-java/pom.xml b/runners/google-cloud-dataflow-java/pom.xml
index f7f1d8076f435..2b7b49d1bd604 100644
--- a/runners/google-cloud-dataflow-java/pom.xml
+++ b/runners/google-cloud-dataflow-java/pom.xml
@@ -287,6 +287,11 @@
       <artifactId>java-sdk-all</artifactId>
     </dependency>
 
+    <dependency>
+      <groupId>org.apache.beam</groupId>
+      <artifactId>runners-core</artifactId>
+    </dependency>
+
     <dependency>
       <groupId>org.apache.avro</groupId>
       <artifactId>avro</artifactId>
diff --git a/runners/google-cloud-dataflow-java/src/main/java/org/apache/beam/sdk/util/GroupAlsoByWindowViaWindowSetDoFn.java b/runners/google-cloud-dataflow-java/src/main/java/org/apache/beam/sdk/util/GroupAlsoByWindowViaWindowSetDoFn.java
new file mode 100644
index 0000000000000..42ebf94ab0658
--- /dev/null
+++ b/runners/google-cloud-dataflow-java/src/main/java/org/apache/beam/sdk/util/GroupAlsoByWindowViaWindowSetDoFn.java
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.beam.sdk.util;
+
+import org.apache.beam.sdk.transforms.DoFn;
+import org.apache.beam.sdk.transforms.windowing.BoundedWindow;
+import org.apache.beam.sdk.values.KV;
+
+/**
+ * Stub class that exists for compatibility with code expecting
+ * {@link org.apache.beam.runners.core.GroupAlsoByWindowViaWindowSetDoFn} in the old location.
+ */
+public class GroupAlsoByWindowViaWindowSetDoFn {
+
+  public static <K, InputT, OutputT, W extends BoundedWindow>
+  DoFn<KeyedWorkItem<K, InputT>, KV<K, OutputT>> create(
+      WindowingStrategy<?, W> strategy, SystemReduceFn<K, InputT, ?, OutputT, W> reduceFn) {
+    return org.apache.beam.runners.core.GroupAlsoByWindowViaWindowSetDoFn.create(
+        strategy, reduceFn);
+  }
+
+  /** Prohibit instantiation. */
+  private GroupAlsoByWindowViaWindowSetDoFn() {}
+}
+