mv com/google/domain/registry google/registry

This change renames directories in preparation for the great package
rename. The repository is now in a broken state because the code
itself hasn't been updated. However this should ensure that git
correctly preserves history for each file.

java/google/registry/mapreduce/inputs/EppResourceKeyReader.java

@@ -0,0 +1,56 @@
+// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
+//
+// Licensed 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 com.google.domain.registry.mapreduce.inputs;
+
+import com.google.appengine.tools.mapreduce.InputReader;
+import com.google.common.collect.ImmutableSet;
+import com.google.domain.registry.model.EppResource;
+import com.google.domain.registry.model.index.EppResourceIndex;
+import com.google.domain.registry.model.index.EppResourceIndexBucket;
+
+import com.googlecode.objectify.Key;
+
+import java.util.NoSuchElementException;
+
+/**
+ * Reader that maps over {@link EppResourceIndex} and returns resource keys.
+ *
+ * <p>When mapping over keys we can't distinguish between Objectify polymorphic types.
+ */
+class EppResourceKeyReader<R extends EppResource> extends EppResourceBaseReader<Key<R>> {
+
+  private static final long serialVersionUID = -428232054739189774L;
+
+  public EppResourceKeyReader(
+      Key<EppResourceIndexBucket> bucketKey, ImmutableSet<Class<? extends R>> resourceClasses) {
+    super(
+        bucketKey,
+        ONE_MB,  // Estimate 1MB of memory for this reader, which is massive overkill.
+        varargsToKinds(resourceClasses));
+  }
+
+  /**
+   * Called for each map invocation.
+   *
+   * @throws NoSuchElementException if there are no more elements, as specified in the
+   *         {@link InputReader#next} Javadoc.
+   */
+  @Override
+  @SuppressWarnings("unchecked")
+  public Key<R> next() throws NoSuchElementException {
+    // This is a safe cast because we filtered on kind inside the query.
+    return (Key<R>) nextEri().getReference().getKey();
+  }
+}