Use AutoValue for Category

WORKSPACE

@@ -1,6 +1,7 @@
 workspace(name = "org_tensorflow_lite_support")
 
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+load("@bazel_tools//tools/build_defs/repo:java.bzl", "java_import_external")
 
 http_archive(
     name = "io_bazel_rules_closure",
@@ -170,6 +171,64 @@ http_archive(
     build_file = "//third_party:libyuv.BUILD",
 )
 
+java_import_external(
+    name = "com_google_auto_value",
+    jar_sha256 = "fd811b92bb59ae8a4cf7eb9dedd208300f4ea2b6275d726e4df52d8334aaae9d",
+    jar_urls = [
+        "https://mirror.bazel.build/repo1.maven.org/maven2/com/google/auto/value/auto-value/1.6/auto-value-1.6.jar",
+        "https://repo1.maven.org/maven2/com/google/auto/value/auto-value/1.6/auto-value-1.6.jar",
+    ],
+    licenses = ["notice"],  # Apache 2.0
+    generated_rule_name = "processor",
+    exports = ["@com_google_auto_value_annotations"],
+    extra_build_file_content = "\n".join([
+        "java_plugin(",
+        "    name = \"AutoAnnotationProcessor\",",
+        "    output_licenses = [\"unencumbered\"],",
+        "    processor_class = \"com.google.auto.value.processor.AutoAnnotationProcessor\",",
+        "    tags = [\"annotation=com.google.auto.value.AutoAnnotation;genclass=${package}.AutoAnnotation_${outerclasses}${classname}_${methodname}\"],",
+        "    deps = [\":processor\"],",
+        ")",
+        "",
+        "java_plugin(",
+        "    name = \"AutoOneOfProcessor\",",
+        "    output_licenses = [\"unencumbered\"],",
+        "    processor_class = \"com.google.auto.value.processor.AutoOneOfProcessor\",",
+        "    tags = [\"annotation=com.google.auto.value.AutoValue;genclass=${package}.AutoOneOf_${outerclasses}${classname}\"],",
+        "    deps = [\":processor\"],",
+        ")",
+        "",
+        "java_plugin(",
+        "    name = \"AutoValueProcessor\",",
+        "    output_licenses = [\"unencumbered\"],",
+        "    processor_class = \"com.google.auto.value.processor.AutoValueProcessor\",",
+        "    tags = [\"annotation=com.google.auto.value.AutoValue;genclass=${package}.AutoValue_${outerclasses}${classname}\"],",
+        "    deps = [\":processor\"],",
+        ")",
+        "",
+        "java_library(",
+        "    name = \"com_google_auto_value\",",
+        "    exported_plugins = [",
+        "        \":AutoAnnotationProcessor\",",
+        "        \":AutoOneOfProcessor\",",
+        "        \":AutoValueProcessor\",",
+        "    ],",
+        "    exports = [\"@com_google_auto_value_annotations\"],",
+        ")",
+    ]),
+)
+
+java_import_external(
+    name = "com_google_auto_value_annotations",
+    jar_sha256 = "d095936c432f2afc671beaab67433e7cef50bba4a861b77b9c46561b801fae69",
+    jar_urls = [
+        "https://mirror.bazel.build/repo1.maven.org/maven2/com/google/auto/value/auto-value-annotations/1.6/auto-value-annotations-1.6.jar",
+        "https://repo1.maven.org/maven2/com/google/auto/value/auto-value-annotations/1.6/auto-value-annotations-1.6.jar",
+    ],
+    licenses = ["notice"],  # Apache 2.0
+    neverlink = True,
+    default_visibility = ["@com_google_auto_value//:__pkg__"],
+)
 
 load("//third_party/flatbuffers:workspace.bzl", flatbuffers = "repo")
 

tensorflow_lite_support/java/BUILD

@@ -19,6 +19,7 @@ android_library(
     javacopts = JAVACOPTS,
     manifest = "AndroidManifest.xml",
     deps = [
+        "@com_google_auto_value",
         "@org_checkerframework_qual",
         "@org_tensorflow//tensorflow/lite/java:tensorflowlite",
     ],

tensorflow_lite_support/java/src/java/org/tensorflow/lite/support/label/Category.java

@@ -15,48 +15,23 @@
 
 package org.tensorflow.lite.support.label;
 
-import java.util.Objects;
+import com.google.auto.value.AutoValue;
+import org.tensorflow.lite.annotations.UsedByReflection;
 
 /**
  * Category is a util class, contains a label and a float value. Typically it's used as result of
  * classification tasks.
  */
-public final class Category {
-  private final String label;
-  private final float score;
-
-  /** Constructs a Category. */
-  public Category(String label, float score) {
-    this.label = label;
-    this.score = score;
-  }
-
-  /** Gets the reference of category's label. */
-  public String getLabel() {
-    return label;
-  }
+@AutoValue
+@UsedByReflection("ClassifierJNI")
+public abstract class Category {
 
-  /** Gets the score of the category. */
-  public float getScore() {
-    return score;
+  @UsedByReflection("ClassifierJNI")
+  public static Category create(String label, float score) {
+    return new AutoValue_Category(label, score);
   }
 
-  @Override
-  public boolean equals(Object o) {
-    if (o instanceof Category) {
-      Category other = (Category) o;
-      return (other.getLabel().equals(this.label) && other.getScore() == this.score);
-    }
-    return false;
-  }
+  public abstract String getLabel();
 
-  @Override
-  public int hashCode() {
-    return Objects.hash(label, score);
-  }
-
-  @Override
-  public String toString() {
-    return "<Category \"" + label + "\" (score=" + score + ")>";
-  }
+  public abstract float getScore();
 }

tensorflow_lite_support/java/src/java/org/tensorflow/lite/support/label/TensorLabel.java

@@ -198,7 +198,7 @@ public List<Category> getCategoryList() {
     List<Category> result = new ArrayList<>();
     int i = 0;
     for (String label : labels) {
-      result.add(new Category(label, data[i]));
+      result.add(Category.create(label, data[i]));
       i += 1;
     }
     return result;