Add @javax.annotation.Generated to generated flatbuffer Java types (#4986)

* Add @javax.annotation.Generated to generated flatbuffer Java types.

* Updating test goldens.

src/idl_gen_general.cpp

@@ -56,6 +56,7 @@ struct LanguageParameters {
   std::string optional_suffix;
   std::string includes;
   std::string class_annotation;
+  std::string generated_type_annotation;
   CommentConfig comment_config;
 };
 
@@ -87,7 +88,8 @@ const LanguageParameters &GetLangParams(IDLOptions::Language lang) {
         "",
         "import java.nio.*;\nimport java.lang.*;\nimport "
         "java.util.*;\nimport com.google.flatbuffers.*;\n",
-        "\n@SuppressWarnings(\"unused\")\n",
+        "\n@SuppressWarnings(\"unused\")",
+        "\n@javax.annotation.Generated(value=\"flatc\")\n",
         {
             "/**",
             " *",
@@ -120,6 +122,7 @@ const LanguageParameters &GetLangParams(IDLOptions::Language lang) {
         "?",
         "using global::System;\nusing global::FlatBuffers;\n\n",
         "",
+        "",
         {
             nullptr,
             "///",
@@ -218,6 +221,7 @@ class GeneralGenerator : public BaseGenerator {
       }
       code += lang_.class_annotation;
     }
+    code += lang_.generated_type_annotation;
     code += classcode;
     if (!namespace_name.empty()) code += lang_.namespace_end;
     auto filename = NamespaceDir(ns) + defname + lang_.file_extension;

tests/MyGame/Example/Ability.java

@@ -8,6 +8,7 @@ import java.util.*;
 import com.google.flatbuffers.*;
 
 @SuppressWarnings("unused")
+@javax.annotation.Generated(value="flatc")
 public final class Ability extends Struct {
   public void __init(int _i, ByteBuffer _bb) { bb_pos = _i; bb = _bb; }
   public Ability __assign(int _i, ByteBuffer _bb) { __init(_i, _bb); return this; }

tests/MyGame/Example/Any.java

@@ -2,6 +2,8 @@
 
 package MyGame.Example;
 
+
+@javax.annotation.Generated(value="flatc")
 public final class Any {
   private Any() { }
   public static final byte NONE = 0;

tests/MyGame/Example/Color.java

@@ -2,6 +2,8 @@
 
 package MyGame.Example;
 
+
+@javax.annotation.Generated(value="flatc")
 public final class Color {
   private Color() { }
   public static final byte Red = 1;

tests/MyGame/Example/Monster.java

@@ -8,6 +8,7 @@ import java.util.*;
 import com.google.flatbuffers.*;
 
 @SuppressWarnings("unused")
+@javax.annotation.Generated(value="flatc")
 /**
  * an example documentation comment: monster object
  */

tests/MyGame/Example/Referrable.java

@@ -8,6 +8,7 @@ import java.util.*;
 import com.google.flatbuffers.*;
 
 @SuppressWarnings("unused")
+@javax.annotation.Generated(value="flatc")
 public final class Referrable extends Table {
   public static Referrable getRootAsReferrable(ByteBuffer _bb) { return getRootAsReferrable(_bb, new Referrable()); }
   public static Referrable getRootAsReferrable(ByteBuffer _bb, Referrable obj) { _bb.order(ByteOrder.LITTLE_ENDIAN); return (obj.__assign(_bb.getInt(_bb.position()) + _bb.position(), _bb)); }

tests/MyGame/Example/Stat.java

@@ -8,6 +8,7 @@ import java.util.*;
 import com.google.flatbuffers.*;
 
 @SuppressWarnings("unused")
+@javax.annotation.Generated(value="flatc")
 public final class Stat extends Table {
   public static Stat getRootAsStat(ByteBuffer _bb) { return getRootAsStat(_bb, new Stat()); }
   public static Stat getRootAsStat(ByteBuffer _bb, Stat obj) { _bb.order(ByteOrder.LITTLE_ENDIAN); return (obj.__assign(_bb.getInt(_bb.position()) + _bb.position(), _bb)); }

tests/MyGame/Example/Test.java

@@ -8,6 +8,7 @@ import java.util.*;
 import com.google.flatbuffers.*;
 
 @SuppressWarnings("unused")
+@javax.annotation.Generated(value="flatc")
 public final class Test extends Struct {
   public void __init(int _i, ByteBuffer _bb) { bb_pos = _i; bb = _bb; }
   public Test __assign(int _i, ByteBuffer _bb) { __init(_i, _bb); return this; }

tests/MyGame/Example/TestSimpleTableWithEnum.java

@@ -8,6 +8,7 @@ import java.util.*;
 import com.google.flatbuffers.*;
 
 @SuppressWarnings("unused")
+@javax.annotation.Generated(value="flatc")
 final class TestSimpleTableWithEnum extends Table {
   public static TestSimpleTableWithEnum getRootAsTestSimpleTableWithEnum(ByteBuffer _bb) { return getRootAsTestSimpleTableWithEnum(_bb, new TestSimpleTableWithEnum()); }
   public static TestSimpleTableWithEnum getRootAsTestSimpleTableWithEnum(ByteBuffer _bb, TestSimpleTableWithEnum obj) { _bb.order(ByteOrder.LITTLE_ENDIAN); return (obj.__assign(_bb.getInt(_bb.position()) + _bb.position(), _bb)); }

tests/MyGame/Example/TypeAliases.java

@@ -8,6 +8,7 @@ import java.util.*;
 import com.google.flatbuffers.*;
 
 @SuppressWarnings("unused")
+@javax.annotation.Generated(value="flatc")
 public final class TypeAliases extends Table {
   public static TypeAliases getRootAsTypeAliases(ByteBuffer _bb) { return getRootAsTypeAliases(_bb, new TypeAliases()); }
   public static TypeAliases getRootAsTypeAliases(ByteBuffer _bb, TypeAliases obj) { _bb.order(ByteOrder.LITTLE_ENDIAN); return (obj.__assign(_bb.getInt(_bb.position()) + _bb.position(), _bb)); }

tests/MyGame/Example/Vec3.java

@@ -8,6 +8,7 @@ import java.util.*;
 import com.google.flatbuffers.*;
 
 @SuppressWarnings("unused")
+@javax.annotation.Generated(value="flatc")
 public final class Vec3 extends Struct {
   public void __init(int _i, ByteBuffer _bb) { bb_pos = _i; bb = _bb; }
   public Vec3 __assign(int _i, ByteBuffer _bb) { __init(_i, _bb); return this; }

tests/MyGame/Example2/Monster.java

@@ -8,6 +8,7 @@ import java.util.*;
 import com.google.flatbuffers.*;
 
 @SuppressWarnings("unused")
+@javax.annotation.Generated(value="flatc")
 public final class Monster extends Table {
   public static Monster getRootAsMonster(ByteBuffer _bb) { return getRootAsMonster(_bb, new Monster()); }
   public static Monster getRootAsMonster(ByteBuffer _bb, Monster obj) { _bb.order(ByteOrder.LITTLE_ENDIAN); return (obj.__assign(_bb.getInt(_bb.position()) + _bb.position(), _bb)); }

tests/MyGame/InParentNamespace.java

@@ -8,6 +8,7 @@ import java.util.*;
 import com.google.flatbuffers.*;
 
 @SuppressWarnings("unused")
+@javax.annotation.Generated(value="flatc")
 public final class InParentNamespace extends Table {
   public static InParentNamespace getRootAsInParentNamespace(ByteBuffer _bb) { return getRootAsInParentNamespace(_bb, new InParentNamespace()); }
   public static InParentNamespace getRootAsInParentNamespace(ByteBuffer _bb, InParentNamespace obj) { _bb.order(ByteOrder.LITTLE_ENDIAN); return (obj.__assign(_bb.getInt(_bb.position()) + _bb.position(), _bb)); }

tests/namespace_test/NamespaceA/NamespaceB/EnumInNestedNS.java

@@ -2,6 +2,8 @@
 
 package NamespaceA.NamespaceB;
 
+
+@javax.annotation.Generated(value="flatc")
 public final class EnumInNestedNS {
   private EnumInNestedNS() { }
   public static final byte A = 0;

tests/namespace_test/NamespaceA/NamespaceB/StructInNestedNS.java

@@ -8,6 +8,7 @@ import java.util.*;
 import com.google.flatbuffers.*;
 
 @SuppressWarnings("unused")
+@javax.annotation.Generated(value="flatc")
 public final class StructInNestedNS extends Struct {
   public void __init(int _i, ByteBuffer _bb) { bb_pos = _i; bb = _bb; }
   public StructInNestedNS __assign(int _i, ByteBuffer _bb) { __init(_i, _bb); return this; }

tests/namespace_test/NamespaceA/NamespaceB/TableInNestedNS.java

@@ -8,6 +8,7 @@ import java.util.*;
 import com.google.flatbuffers.*;
 
 @SuppressWarnings("unused")
+@javax.annotation.Generated(value="flatc")
 public final class TableInNestedNS extends Table {
   public static TableInNestedNS getRootAsTableInNestedNS(ByteBuffer _bb) { return getRootAsTableInNestedNS(_bb, new TableInNestedNS()); }
   public static TableInNestedNS getRootAsTableInNestedNS(ByteBuffer _bb, TableInNestedNS obj) { _bb.order(ByteOrder.LITTLE_ENDIAN); return (obj.__assign(_bb.getInt(_bb.position()) + _bb.position(), _bb)); }

tests/namespace_test/NamespaceA/SecondTableInA.java

@@ -8,6 +8,7 @@ import java.util.*;
 import com.google.flatbuffers.*;
 
 @SuppressWarnings("unused")
+@javax.annotation.Generated(value="flatc")
 public final class SecondTableInA extends Table {
   public static SecondTableInA getRootAsSecondTableInA(ByteBuffer _bb) { return getRootAsSecondTableInA(_bb, new SecondTableInA()); }
   public static SecondTableInA getRootAsSecondTableInA(ByteBuffer _bb, SecondTableInA obj) { _bb.order(ByteOrder.LITTLE_ENDIAN); return (obj.__assign(_bb.getInt(_bb.position()) + _bb.position(), _bb)); }

tests/namespace_test/NamespaceA/TableInFirstNS.java

@@ -8,6 +8,7 @@ import java.util.*;
 import com.google.flatbuffers.*;
 
 @SuppressWarnings("unused")
+@javax.annotation.Generated(value="flatc")
 public final class TableInFirstNS extends Table {
   public static TableInFirstNS getRootAsTableInFirstNS(ByteBuffer _bb) { return getRootAsTableInFirstNS(_bb, new TableInFirstNS()); }
   public static TableInFirstNS getRootAsTableInFirstNS(ByteBuffer _bb, TableInFirstNS obj) { _bb.order(ByteOrder.LITTLE_ENDIAN); return (obj.__assign(_bb.getInt(_bb.position()) + _bb.position(), _bb)); }

tests/namespace_test/NamespaceC/TableInC.java

@@ -8,6 +8,7 @@ import java.util.*;
 import com.google.flatbuffers.*;
 
 @SuppressWarnings("unused")
+@javax.annotation.Generated(value="flatc")
 public final class TableInC extends Table {
   public static TableInC getRootAsTableInC(ByteBuffer _bb) { return getRootAsTableInC(_bb, new TableInC()); }
   public static TableInC getRootAsTableInC(ByteBuffer _bb, TableInC obj) { _bb.order(ByteOrder.LITTLE_ENDIAN); return (obj.__assign(_bb.getInt(_bb.position()) + _bb.position(), _bb)); }