Remove LegacyDescriptorsUtil.java and JRuby's use of legacy descriptor APIs

This is not a breaking change since this has not been released yet.

PiperOrigin-RevId: 597824548

java/core/src/main/java/com/google/protobuf/LegacyDescriptorsUtil.java

@@ -1,72 +0,0 @@
-// Protocol Buffers - Google's data interchange format
-// Copyright 2008 Google Inc.  All rights reserved.
-//
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file or at
-// https://developers.google.com/open-source/licenses/bsd
-
-package com.google.protobuf;
-
-import com.google.protobuf.Descriptors.FieldDescriptor;
-import com.google.protobuf.Descriptors.FileDescriptor;
-import com.google.protobuf.Descriptors.OneofDescriptor;
-
-/**
- * This file is meant to be a temporary housing for legacy descriptor APIs we want to deprecate and
- * remove. This will help prevent backslide by allowing us to control visibility.
- */
-public final class LegacyDescriptorsUtil {
-
-  /** Wraps FileDescriptor */
-  public static final class LegacyFileDescriptor {
-
-    /** The syntax of the .proto file. */
-    public static enum Syntax {
-      UNKNOWN("unknown"),
-      PROTO2("proto2"),
-      PROTO3("proto3");
-
-      Syntax(String name) {
-        this.name = name;
-      }
-
-      final String name;
-    }
-
-    public static Syntax getSyntax(FileDescriptor descriptor) {
-      switch (descriptor.getSyntax()) {
-        case UNKNOWN:
-          return Syntax.UNKNOWN;
-        case PROTO2:
-          return Syntax.PROTO2;
-        case PROTO3:
-          return Syntax.PROTO3;
-      }
-      throw new IllegalArgumentException("Unexpected syntax");
-    }
-
-    private LegacyFileDescriptor() {}
-  }
-
-  /** Wraps FieldDescriptor */
-  public static final class LegacyFieldDescriptor {
-
-    public static boolean hasOptionalKeyword(FieldDescriptor descriptor) {
-      return descriptor.hasOptionalKeyword();
-    }
-
-    private LegacyFieldDescriptor() {}
-  }
-
-  /** Wraps OneofDescriptor */
-  public static final class LegacyOneofDescriptor {
-
-    public static boolean isSynthetic(OneofDescriptor descriptor) {
-      return descriptor.isSynthetic();
-    }
-
-    private LegacyOneofDescriptor() {}
-  }
-
-  private LegacyDescriptorsUtil() {}
-}

ruby/src/main/java/com/google/protobuf/jruby/RubyEnumDescriptor.java

@@ -36,7 +36,6 @@ import com.google.protobuf.CodedInputStream;
 import com.google.protobuf.DescriptorProtos.EnumDescriptorProto;
 import com.google.protobuf.Descriptors.EnumDescriptor;
 import com.google.protobuf.Descriptors.EnumValueDescriptor;
-import com.google.protobuf.LegacyDescriptorsUtil.LegacyFileDescriptor;
 import org.jruby.Ruby;
 import org.jruby.RubyClass;
 import org.jruby.RubyModule;
@@ -176,8 +175,7 @@ public class RubyEnumDescriptor extends RubyObject {
     Ruby runtime = context.runtime;
 
     RubyModule enumModule = RubyModule.newModule(runtime);
-    boolean defaultValueRequiredButNotFound =
-        LegacyFileDescriptor.getSyntax(descriptor.getFile()) == LegacyFileDescriptor.Syntax.PROTO3;
+    boolean defaultValueRequiredButNotFound = !descriptor.isClosed();
     for (EnumValueDescriptor value : descriptor.getValues()) {
       String name = fixEnumConstantName(value.getName());
       // Make sure it's a valid constant name before trying to create it

ruby/src/main/java/com/google/protobuf/jruby/RubyFieldDescriptor.java

@@ -34,7 +34,6 @@ package com.google.protobuf.jruby;
 
 import com.google.protobuf.CodedInputStream;
 import com.google.protobuf.Descriptors.FieldDescriptor;
-import com.google.protobuf.LegacyDescriptorsUtil.LegacyFileDescriptor;
 import org.jruby.*;
 import org.jruby.anno.JRubyClass;
 import org.jruby.anno.JRubyMethod;
@@ -276,14 +275,6 @@ public class RubyFieldDescriptor extends RubyObject {
 
   protected void setDescriptor(
       ThreadContext context, FieldDescriptor descriptor, RubyDescriptorPool pool) {
-    if (descriptor.isRequired()
-        && LegacyFileDescriptor.getSyntax(descriptor.getFile())
-            == LegacyFileDescriptor.Syntax.PROTO3) {
-      throw Utils.createTypeError(
-          context,
-          descriptor.getName()
-              + " is labeled required but required fields are unsupported in proto3");
-    }
     this.descriptor = descriptor;
     this.name = context.runtime.newString(descriptor.getName());
     this.pool = pool;

ruby/src/main/java/com/google/protobuf/jruby/RubyFileDescriptor.java

@@ -35,8 +35,6 @@ package com.google.protobuf.jruby;
 import com.google.protobuf.CodedInputStream;
 import com.google.protobuf.Descriptors.FileDescriptor;
 import com.google.protobuf.Descriptors.GenericDescriptor;
-import com.google.protobuf.LegacyDescriptorsUtil.LegacyFileDescriptor;
-import com.google.protobuf.LegacyDescriptorsUtil.LegacyFileDescriptor.Syntax.*;
 import org.jruby.*;
 import org.jruby.anno.JRubyClass;
 import org.jruby.anno.JRubyMethod;

ruby/src/main/java/com/google/protobuf/jruby/RubyMessage.java

@@ -41,8 +41,6 @@ import com.google.protobuf.Descriptors.FieldDescriptor;
 import com.google.protobuf.Descriptors.OneofDescriptor;
 import com.google.protobuf.DynamicMessage;
 import com.google.protobuf.InvalidProtocolBufferException;
-import com.google.protobuf.LegacyDescriptorsUtil.LegacyFileDescriptor;
-import com.google.protobuf.LegacyDescriptorsUtil.LegacyOneofDescriptor;
 import com.google.protobuf.Message;
 import com.google.protobuf.UnknownFieldSet;
 import com.google.protobuf.util.JsonFormat;
@@ -74,8 +72,6 @@ public class RubyMessage extends RubyObject {
     this.builder = DynamicMessage.newBuilder(descriptor);
     this.fields = new HashMap<FieldDescriptor, IRubyObject>();
     this.oneofCases = new HashMap<OneofDescriptor, FieldDescriptor>();
-    this.proto3 =
-        LegacyFileDescriptor.getSyntax(descriptor.getFile()) == LegacyFileDescriptor.Syntax.PROTO3;
   }
 
   /*
@@ -644,15 +640,15 @@ public class RubyMessage extends RubyObject {
           e.getMessage());
     }
 
-    if (!ret.proto3) {
-      // Need to reset unknown values in repeated enum fields
-      ret.builder
-          .getUnknownFields()
-          .asMap()
-          .forEach(
-              (i, values) -> {
-                FieldDescriptor fd = ret.builder.getDescriptorForType().findFieldByNumber(i);
-                if (fd != null && fd.isRepeated() && fd.getType() == FieldDescriptor.Type.ENUM) {
+    ret.builder
+        .getUnknownFields()
+        .asMap()
+        .forEach(
+            (i, values) -> {
+              FieldDescriptor fd = ret.builder.getDescriptorForType().findFieldByNumber(i);
+              if (fd != null && fd.isRepeated() && fd.getType() == FieldDescriptor.Type.ENUM) {
+                // Need to reset unknown values in repeated enum fields
+                if (fd.legacyEnumFieldTreatedAsClosed()) {
                   EnumDescriptor ed = fd.getEnumType();
                   values
                       .getVarintList()
@@ -662,8 +658,8 @@ public class RubyMessage extends RubyObject {
                                 fd, ed.findValueByNumberCreatingIfUnknown(value.intValue()));
                           });
                 }
-              });
-    }
+              }
+            });
     if (freeze) {
       ret.freeze(context);
     }
@@ -791,7 +787,7 @@ public class RubyMessage extends RubyObject {
     build(context, 0, SINK_MAXIMUM_NESTING); // Sync Ruby data to the Builder object.
     for (Map.Entry<FieldDescriptor, Object> field : builder.getAllFields().entrySet()) {
       FieldDescriptor fdef = field.getKey();
-      IRubyObject value = getFieldInternal(context, fdef, proto3);
+      IRubyObject value = getFieldInternal(context, fdef, !fdef.hasPresence());
 
       if (fdef.isRepeated() && !fdef.isMapField()) {
         if (fdef.getType() != FieldDescriptor.Type.MESSAGE) {
@@ -1342,7 +1338,7 @@ public class RubyMessage extends RubyObject {
         // Keep track of what Oneofs are set
         if (value.isNil()) {
           oneofCases.remove(oneofDescriptor);
-          if (!LegacyOneofDescriptor.isSynthetic(oneofDescriptor)) {
+          if (fieldDescriptor.getRealContainingOneof() != null) {
             addValue = false;
           }
         } else {
@@ -1506,5 +1502,4 @@ public class RubyMessage extends RubyObject {
   private RubyClass cRepeatedField;
   private RubyClass cMap;
   private boolean ignoreUnknownFieldsOnInit = false;
-  private boolean proto3;
 }