[pigeon] Fixes some Java lint issues (flutter#3060)

* sets classes to final, and other lint issues

* breaking change

packages/pigeon/CHANGELOG.md

@@ -1,3 +1,8 @@
+## 7.0.0
+
+* [java] **BREAKING CHANGE**: Makes data classes final.
+  Updates generators for 1p linters.
+
 ## 6.0.3
 
 * [docs] Updates README.md.

packages/pigeon/lib/generator_tools.dart

@@ -9,7 +9,7 @@ import 'dart:mirrors';
 import 'ast.dart';
 
 /// The current version of pigeon. This must match the version in pubspec.yaml.
-const String pigeonVersion = '6.0.3';
+const String pigeonVersion = '7.0.0';
 
 /// Read all the content from [stdin] to a String.
 String readStdin() {

packages/pigeon/lib/java_generator.dart

@@ -186,7 +186,7 @@ class JavaGenerator extends StructuredGenerator<JavaOptions> {
         indent, klass.documentationComments, _docCommentSpec,
         generatorComments: generatedMessages);
 
-    indent.write('public static class ${klass.name} ');
+    indent.write('public static final class ${klass.name} ');
     indent.scoped('{', '}', () {
       for (final NamedType field in getFieldsInSerializationOrder(klass)) {
         _writeClassField(generatorOptions, root, indent, field);
@@ -340,7 +340,7 @@ class JavaGenerator extends StructuredGenerator<JavaOptions> {
 
   /// Writes the code for a flutter [Api], [api].
   /// Example:
-  /// public static class Foo {
+  /// public static final class Foo {
   ///   public Foo(BinaryMessenger argBinaryMessenger) {...}
   ///   public interface Reply<T> {
   ///     void reply(T reply);
@@ -364,13 +364,14 @@ class JavaGenerator extends StructuredGenerator<JavaOptions> {
     addDocumentationComments(indent, api.documentationComments, _docCommentSpec,
         generatorComments: generatedMessages);
 
-    indent.write('public static class ${api.name} ');
+    indent.write('public static final class ${api.name} ');
     indent.scoped('{', '}', () {
       indent.writeln('private final BinaryMessenger binaryMessenger;');
       indent.write('public ${api.name}(BinaryMessenger argBinaryMessenger)');
       indent.scoped('{', '}', () {
         indent.writeln('this.binaryMessenger = argBinaryMessenger;');
       });
+      indent.write('/** Public interface for sending reply. */ ');
       indent.write('public interface Reply<T> ');
       indent.scoped('{', '}', () {
         indent.writeln('void reply(T reply);');
@@ -427,10 +428,10 @@ class JavaGenerator extends StructuredGenerator<JavaOptions> {
           indent.dec();
           indent.dec();
           indent.write('$channel.send($sendArgument, channelReply -> ');
-          indent.scoped('{', '});', () {
-            if (func.returnType.isVoid) {
-              indent.writeln('callback.reply(null);');
-            } else {
+          if (func.returnType.isVoid) {
+            indent.addln('callback.reply(null));');
+          } else {
+            indent.scoped('{', '});', () {
               const String output = 'output';
               indent.writeln('@SuppressWarnings("ConstantConditions")');
               if (func.returnType.baseName == 'int') {
@@ -441,8 +442,8 @@ class JavaGenerator extends StructuredGenerator<JavaOptions> {
                     '$returnType $output = ($returnType)channelReply;');
               }
               indent.writeln('callback.reply($output);');
-            }
-          });
+            });
+          }
         });
       }
     });

packages/pigeon/mock_handler_tester/test/message.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
-// Autogenerated from Pigeon (v6.0.3), do not edit directly.
+// Autogenerated from Pigeon (v7.0.0), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 // ignore_for_file: public_member_api_docs, non_constant_identifier_names, avoid_as, unused_import, unnecessary_parenthesis, prefer_null_aware_operators, omit_local_variable_types, unused_shown_name, unnecessary_import
 

packages/pigeon/mock_handler_tester/test/test.dart

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
-// Autogenerated from Pigeon (v6.0.3), do not edit directly.
+// Autogenerated from Pigeon (v7.0.0), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 // ignore_for_file: public_member_api_docs, non_constant_identifier_names, avoid_as, unused_import, unnecessary_parenthesis, unnecessary_import
 // ignore_for_file: avoid_relative_lib_imports

packages/pigeon/platform_tests/alternate_language_test_plugin/android/src/main/java/com/example/alternate_language_test_plugin/CoreTests.java

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
-// Autogenerated from Pigeon (v6.0.3), do not edit directly.
+// Autogenerated from Pigeon (v7.0.0), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 
 package com.example.alternate_language_test_plugin;
@@ -48,7 +48,7 @@ private AnEnum(final int index) {
   }
 
   /** Generated class from Pigeon that represents data sent in messages. */
-  public static class AllTypes {
+  public static final class AllTypes {
     private @NonNull Boolean aBool;
 
     public @NonNull Boolean getABool() {
@@ -337,7 +337,7 @@ ArrayList<Object> toList() {
   }
 
   /** Generated class from Pigeon that represents data sent in messages. */
-  public static class AllNullableTypes {
+  public static final class AllNullableTypes {
     private @Nullable Boolean aNullableBool;
 
     public @Nullable Boolean getANullableBool() {
@@ -657,7 +657,7 @@ ArrayList<Object> toList() {
   }
 
   /** Generated class from Pigeon that represents data sent in messages. */
-  public static class AllNullableTypesWrapper {
+  public static final class AllNullableTypesWrapper {
     private @NonNull AllNullableTypes values;
 
     public @NonNull AllNullableTypes getValues() {
@@ -2171,13 +2171,13 @@ protected void writeValue(@NonNull ByteArrayOutputStream stream, Object value) {
    *
    * <p>Generated class from Pigeon that represents Flutter messages that can be called from Java.
    */
-  public static class FlutterIntegrationCoreApi {
+  public static final class FlutterIntegrationCoreApi {
     private final BinaryMessenger binaryMessenger;
 
     public FlutterIntegrationCoreApi(BinaryMessenger argBinaryMessenger) {
       this.binaryMessenger = argBinaryMessenger;
     }
-
+    /** Public interface for sending reply. */
     public interface Reply<T> {
       void reply(T reply);
     }
@@ -2192,11 +2192,7 @@ public void noop(Reply<Void> callback) {
       BasicMessageChannel<Object> channel =
           new BasicMessageChannel<>(
               binaryMessenger, "dev.flutter.pigeon.FlutterIntegrationCoreApi.noop", getCodec());
-      channel.send(
-          null,
-          channelReply -> {
-            callback.reply(null);
-          });
+      channel.send(null, channelReply -> callback.reply(null));
     }
     /** Returns the passed object, to test serialization and deserialization. */
     public void echoAllTypes(@NonNull AllTypes everythingArg, Reply<AllTypes> callback) {

packages/pigeon/platform_tests/alternate_language_test_plugin/ios/Classes/CoreTests.gen.h

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
-// Autogenerated from Pigeon (v6.0.3), do not edit directly.
+// Autogenerated from Pigeon (v7.0.0), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 
 #import <Foundation/Foundation.h>

packages/pigeon/platform_tests/alternate_language_test_plugin/ios/Classes/CoreTests.gen.m

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
-// Autogenerated from Pigeon (v6.0.3), do not edit directly.
+// Autogenerated from Pigeon (v7.0.0), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 
 #import "CoreTests.gen.h"