Implement @Export with AutoAnnotation

Change-Id: I217bc1617031e20adbacd176e0c91812c698ac08

java/com/google/gerrit/extensions/BUILD

@@ -30,6 +30,7 @@ java_library(
     deps = [
         "//java/com/google/gerrit/common:annotations",
         "//lib:guava",
+        "//lib/auto:auto-value-annotations",
         "//lib/guice",
         "//lib/guice:guice-assistedinject",
     ],

java/com/google/gerrit/extensions/annotations/ExportImpl.java

@@ -1,52 +0,0 @@
-// Copyright (C) 2012 The Android Open Source Project
-//
-// 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.gerrit.extensions.annotations;
-
-import java.io.Serializable;
-import java.lang.annotation.Annotation;
-
-final class ExportImpl implements Export, Serializable {
-  private static final long serialVersionUID = 0;
-  private final String value;
-
-  ExportImpl(String value) {
-    this.value = value;
-  }
-
-  @Override
-  public Class<? extends Annotation> annotationType() {
-    return Export.class;
-  }
-
-  @Override
-  public String value() {
-    return value;
-  }
-
-  @Override
-  public int hashCode() {
-    return (127 * "value".hashCode()) ^ value.hashCode();
-  }
-
-  @Override
-  public boolean equals(Object o) {
-    return o instanceof Export && value.equals(((Export) o).value());
-  }
-
-  @Override
-  public String toString() {
-    return "@" + Export.class.getName() + "(value=" + value + ")";
-  }
-}

java/com/google/gerrit/extensions/annotations/Exports.java

@@ -14,11 +14,14 @@
 
 package com.google.gerrit.extensions.annotations;
 
+import com.google.auto.value.AutoAnnotation;
+
 /** Static constructors for {@link Export} annotations. */
 public final class Exports {
   /** Create an annotation to export under a specific name. */
-  public static Export named(String name) {
-    return new ExportImpl(name);
+  @AutoAnnotation
+  public static Export named(String value) {
+    return new AutoAnnotation_Exports_named(value);
   }
 
   /** Create an annotation to export based on a cannonical class name. */