Initial, easy changes to support later addition of RDAP metrics

I split this out to avoid having a giant CL that changes everything. The actual
metrics will follow later.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174356874

java/google/registry/rdap/RdapResultSet.java

@@ -0,0 +1,46 @@
+// Copyright 2017 The Nomulus 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 google.registry.rdap;
+
+import com.google.auto.value.AutoValue;
+import google.registry.model.EppResource;
+import google.registry.rdap.RdapSearchResults.IncompletenessWarningType;
+import java.util.List;
+
+@AutoValue
+abstract class RdapResultSet<T extends EppResource> {
+
+  static <S extends EppResource> RdapResultSet<S> create(List<S> resources) {
+    return create(resources, IncompletenessWarningType.NONE, resources.size());
+  }
+
+  static <S extends EppResource> RdapResultSet<S> create(
+      List<S> resources,
+      IncompletenessWarningType incompletenessWarningType,
+      int numResourcesRetrieved) {
+    return new AutoValue_RdapResultSet<>(
+        resources, incompletenessWarningType, numResourcesRetrieved);
+  }
+
+  /** List of EPP resources. */
+  abstract List<T> resources();
+
+  /** Type of warning to display regarding possible incomplete data. */
+  abstract IncompletenessWarningType incompletenessWarningType();
+
+  /** Number of resources retrieved from the database in the process of assembling the data set. */
+  abstract int numResourcesRetrieved();
+}
+