Java Code Examples for com.google.protobuf.Descriptors

/**
 * Get the value of the field with the given field name on the given message.
 * If the field is repeated, the repeated values are combined into a list. If the field has a message type,
 * the value is returned as a {@link Message} of that type. Otherwise, the field is returned as a primitive.
 * @param message a message or builder to extract the field from
 * @param fieldName the field to extract
 * @return the value of the field as described above
 */
@Nullable
public static Object getFieldOnMessage(@Nonnull MessageOrBuilder message, @Nonnull String fieldName) {
    final Descriptors.FieldDescriptor field = findFieldDescriptorOnMessage(message, fieldName);
    if (field.isRepeated()) {
        int count = message.getRepeatedFieldCount(field);
        List<Object> list = new ArrayList<>(count);
        for (int i = 0; i < count; i++) {
            list.add(message.getRepeatedField(field, i));
        }
        return list;
    }
    if (field.hasDefaultValue() || message.hasField(field)) {
        if (field.getJavaType() == Descriptors.FieldDescriptor.JavaType.MESSAGE &&
                TupleFieldsHelper.isTupleField(field.getMessageType())) {
            return TupleFieldsHelper.fromProto((Message)message.getField(field), field.getMessageType());
        } else {
            return message.getField(field);
        }
    } else {
        return null;
    }
}
 

private void fillUnionFields(boolean processExtensionOptions) {
    if (unionDescriptor == null) {
        throw new RecordCoreException("cannot fill union fiends as no union descriptor has been set");
    }
    if (!unionFields.isEmpty()) {
        throw new RecordCoreException("cannot set union fields twice");
    }
    for (Descriptors.FieldDescriptor unionField : unionDescriptor.getFields()) {
        Descriptors.Descriptor descriptor = unionField.getMessageType();
        if (!unionFields.containsKey(descriptor)) {
            processRecordType(unionField, processExtensionOptions);
            unionFields.put(descriptor, unionField);
        } else {
            // The preferred field is the last one, except if there is one whose name matches.
            remapUnionField(descriptor, unionField);
        }
    }
}
 

private EnumValueChangeInfo diffEnumValue(
    Descriptors.EnumValueDescriptor f_ref, Descriptors.EnumValueDescriptor f_new) {
  diffOptionsFromEnumValue(f_ref, f_new);
  EnumValueChangeInfo.Builder builder = EnumValueChangeInfo.newBuilder();

  if (!f_ref.getName().equals(f_new.getName())) {
    builder.setChangeType(ChangeType.CHANGED);
    builder.setFromName(f_ref.getName());
    builder.setToName(f_new.getName());
  }
  if (isDeprecated(f_ref) != isDeprecated(f_new)) {
    builder.setChangeType(ChangeType.CHANGED);
    builder.setFromDeprecated(isDeprecated(f_ref));
    builder.setToDeprecated(isDeprecated(f_new));
  }

  if (builder.getChangeType().equals(ChangeType.CHANGED)) {
    return builder.build();
  }
  return null;
}
 

@Override
public DataParser getParser(String id, InputStream is, String offset) throws DataParserException {
  try {
    return new ProtobufDataParser(
        getSettings().getContext(),
        id,
        descriptor,
        messageTypeToExtensionMap,
        extensionRegistry,
        is,
        offset,
        getSettings().getOverRunLimit(),
        isDelimited
    );
  } catch (IOException | Descriptors.DescriptorValidationException e) {
    throw new DataParserException(Errors.DATA_PARSER_01, e.toString(), e);
  }
}
 

/**
 * Constructs a named {@code Message} from a {@code .desc} file into a {@code Descriptor}.
 * <p>
 * This will parse the {@code .desc} file and then extract the encapsulated
 * {@link com.google.protobuf.Descriptors.Descriptor} the designated {@link Message} from the resulting parent
 * {@link Descriptors.FileDescriptor}.
 *
 * @param filePath the location of the .desc file
 * @param messageName the name of the Message
 * @return the constructed Descriptor
 */
public static Descriptors.Descriptor buildDescriptor(String filePath, String messageName) {
  Descriptors.FileDescriptor fileDescriptor = parseFileDescriptor(filePath);
  Descriptors.Descriptor result = null;

  for (Descriptors.Descriptor descriptor : fileDescriptor.getMessageTypes()) {
    if (descriptor.getName().equals(messageName)) {
      result = descriptor;
    }
  }

  if (null == result) {
    throw new RuntimeException("Unable to locate Message '" + messageName + "' in Descriptor");
  }

  return result;
}
 

private String getParsingInfo(T protoMessageInstance) {
    List<ProtoBufParsingInfo> protoBufParsingInfos = new LinkedList<>();
    protoMessageInstance.getDescriptorForType().getFields().forEach(new Consumer<Descriptors.FieldDescriptor>() {
        @Override
        public void accept(Descriptors.FieldDescriptor fieldDescriptor) {
            protoBufParsingInfos.add(new ProtoBufParsingInfo(fieldDescriptor.getNumber(),
                    fieldDescriptor.getName(), fieldDescriptor.getType().name(),
                    fieldDescriptor.toProto().getLabel().name(), null));
        }
    });

    try {
        return new ObjectMapper().writeValueAsString(protoBufParsingInfos);
    } catch (JsonProcessingException e) {
        throw new RuntimeException(e);
    }
}
 

/**
 * Retrieves and converts Protobuf fields from a Message.
 * <p>
 * If the field in the {@link com.google.protobuf.Descriptors.Descriptor} exists in the {@link Message}, the value is
 * retrieved and converted using {@link #getFieldValue(Descriptors.FieldDescriptor, Object, DataType)}.
 * Otherwise, the field value is {@code null}.
 * The extraction honors the order of the {@code Descriptor}.
 *
 * @param dsc the Protobuf Descriptor with all fields
 * @param msg the Message with the current field values
 * @param schema the Dataset schema derived from the Descriptor
 * @return a list of converted values
 */
public static List<Object> buildRowValues(Descriptors.Descriptor dsc, Message msg, StructType schema) {
  List<Object> values = new ArrayList<>();
  Object val;

  for (Descriptors.FieldDescriptor fd : dsc.getFields()) {
    if ( (!fd.isRepeated() && msg.hasField(fd)) || (fd.isRepeated() && msg.getRepeatedFieldCount(fd) > 0) ) {
      val = getFieldValue(fd, msg.getField(fd), schema.apply(fd.getName()).dataType());
    } else {
      LOG.trace("FieldDescriptor[{}] => not found", fd.getFullName());
      val = null;
    }
    values.add(val);
  }

  return values;
}
 

public Collection<Descriptors.EnumDescriptor> findEnumDescriptorsByOption(String optionName) {
  Descriptors.FieldDescriptor fieldDescriptor = optionsCatalog.getEnumOptionByName(optionName);
  return enumMap.values().stream()
      .filter(
          descriptor -> {
            DescriptorProtos.EnumOptions options = descriptor.getOptions();
            UnknownFieldSet.Field unknown =
                options.getUnknownFields().getField(fieldDescriptor.getNumber());
            if (unknown.getLengthDelimitedList().size()
                    + unknown.getFixed64List().size()
                    + unknown.getFixed32List().size()
                    + unknown.getVarintList().size()
                > 0) {
              return true;
            }
            return options.getAllFields().containsKey(fieldDescriptor);
          })
      .collect(Collectors.toList());
}
 

@SuppressWarnings("unchecked")
@Override
public Mono<Void> write(Publisher<? extends Message> inputStream, ResolvableType elementType,
		@Nullable MediaType mediaType, ReactiveHttpOutputMessage message, Map<String, Object> hints) {

	try {
		Message.Builder builder = getMessageBuilder(elementType.toClass());
		Descriptors.Descriptor descriptor = builder.getDescriptorForType();
		message.getHeaders().add(X_PROTOBUF_SCHEMA_HEADER, descriptor.getFile().getName());
		message.getHeaders().add(X_PROTOBUF_MESSAGE_HEADER, descriptor.getFullName());
		if (inputStream instanceof Flux) {
			if (mediaType == null) {
				message.getHeaders().setContentType(((HttpMessageEncoder<?>)getEncoder()).getStreamingMediaTypes().get(0));
			}
			else if (!ProtobufEncoder.DELIMITED_VALUE.equals(mediaType.getParameters().get(ProtobufEncoder.DELIMITED_KEY))) {
				Map<String, String> parameters = new HashMap<>(mediaType.getParameters());
				parameters.put(ProtobufEncoder.DELIMITED_KEY, ProtobufEncoder.DELIMITED_VALUE);
				message.getHeaders().setContentType(new MediaType(mediaType.getType(), mediaType.getSubtype(), parameters));
			}
		}
		return super.write(inputStream, elementType, mediaType, message, hints);
	}
	catch (Exception ex) {
		return Mono.error(new DecodingException("Could not read Protobuf message: " + ex.getMessage(), ex));
	}
}
 

private static void validateInnerRecordsInRightPlaces(@Nonnull RecordMetaData metaData) {
    Descriptors.FileDescriptor recordsDescriptor = metaData.getRecordsDescriptor();
    Descriptors.Descriptor innerRecord = recordsDescriptor.findMessageTypeByName("InnerRecord");
    assertNotNull(innerRecord);
    Descriptors.Descriptor outerRecord = recordsDescriptor.findMessageTypeByName("OuterRecord");
    assertNotNull(outerRecord);
    Descriptors.Descriptor middleRecord = outerRecord.findNestedTypeByName("MiddleRecord");
    assertNotNull(middleRecord);
    Descriptors.Descriptor nestedInnerRecord = middleRecord.findNestedTypeByName("InnerRecord");
    assertNotNull(nestedInnerRecord);
    Descriptors.FieldDescriptor innerField = outerRecord.findFieldByName("inner");
    assertSame(nestedInnerRecord, innerField.getMessageType());
    assertNotSame(innerRecord, innerField.getMessageType());
    Descriptors.FieldDescriptor nestedInnerField = outerRecord.findFieldByName("inner");
    assertSame(nestedInnerRecord, nestedInnerField.getMessageType());
    assertNotSame(innerRecord, nestedInnerField.getMessageType());
}
 

private void dumpValue(DynamicMessage.Builder builder, Descriptors.FieldDescriptor fd, Object val) {
    if (JavaType.ENUM == fd.getJavaType()) {
        Descriptors.EnumValueDescriptor enum_val = null;
        if (val instanceof Descriptors.EnumValueDescriptor) {
            enum_val = (Descriptors.EnumValueDescriptor) val;
        } else {
            val = get_enum_value(cachePbs, fd.getEnumType(), (Integer) val);
        }

        if (null == enum_val) {
            return;
        }

        if (fd.isRepeated()) {
            builder.addRepeatedField(fd, enum_val);
        } else {
            builder.setField(fd, enum_val);
        }
    } else {
        if (fd.isRepeated()) {
            builder.addRepeatedField(fd, val);
        } else {
            builder.setField(fd, val);
        }
    }
}
 

static public Map<Descriptors.FieldDescriptor, Object> getFields(MessageOrBuilder message, boolean withDefaultValue) {
        if (!withDefaultValue) {
            return message.getAllFields();
        }
        Map<Descriptors.FieldDescriptor, Object> fieldsToPrint = new LinkedHashMap<>();
        for (Descriptors.FieldDescriptor field : message.getDescriptorForType().getFields()) {
            if (field.isOptional()) {
                if (field.getJavaType() == Descriptors.FieldDescriptor.JavaType.MESSAGE && !message.hasField(field)) {
                    continue;
                }
//                if (field.getJavaType() == Descriptors.FieldDescriptor.JavaType.STRING && !message.hasField(field)) {
//                    continue;
//                }
            }
            fieldsToPrint.put(field, message.getField(field));
        }
        return fieldsToPrint;
    }
 

private static Descriptors.Descriptor marshalDescriptor(String desc) {
  DescriptorProtos.FileDescriptorSet fileDescriptorSet;

  try (BufferedInputStream dscFile = new BufferedInputStream(new FileInputStream(
      TestProtobufUtils.class.getResource(desc).getPath()
  ))) {
    fileDescriptorSet = DescriptorProtos.FileDescriptorSet.parseFrom(dscFile);
  } catch (Throwable throwable) {
    throw new RuntimeException("Unable to construct test resources", throwable);
  }

  // Get the attached .proto file
  DescriptorProtos.FileDescriptorProto descriptorProto = fileDescriptorSet.getFile(0);

  try {
    Descriptors.FileDescriptor fileDescriptor =  Descriptors.FileDescriptor.buildFrom(descriptorProto,
        new Descriptors.FileDescriptor[]{});
    if (fileDescriptor.getMessageTypes().isEmpty()) {
      throw new RuntimeException("No MessageTypes returned, " + fileDescriptor.getName());
    }

    return fileDescriptor.getMessageTypes().get(0);
  } catch (Descriptors.DescriptorValidationException e) {
    throw new RuntimeException("Error constructing FileDescriptor", e);
  }
}
 

public ListConverter(Message.Builder parentBuilder, Descriptors.FieldDescriptor fieldDescriptor, Type parquetType) {
  LogicalTypeAnnotation logicalTypeAnnotation = parquetType.getLogicalTypeAnnotation();
  if (!(logicalTypeAnnotation instanceof LogicalTypeAnnotation.ListLogicalTypeAnnotation) || parquetType.isPrimitive()) {
    throw new ParquetDecodingException("Expected LIST wrapper. Found: " + logicalTypeAnnotation + " instead.");
  }

  GroupType rootWrapperType = parquetType.asGroupType();
  if (!rootWrapperType.containsField("list") || rootWrapperType.getType("list").isPrimitive()) {
    throw new ParquetDecodingException("Expected repeated 'list' group inside LIST wrapperr but got: " + rootWrapperType);
  }

  GroupType listType = rootWrapperType.getType("list").asGroupType();
  if (!listType.containsField("element")) {
    throw new ParquetDecodingException("Expected 'element' inside repeated list group but got: " + listType);
  }

  Type elementType = listType.getType("element");
  converter = newMessageConverter(parentBuilder, fieldDescriptor, elementType);
}
 

public DataVerifyPbOneof(Descriptors.OneofDescriptor desc) {
    super(desc.getName());

    for (Descriptors.FieldDescriptor fd : desc.getFields()) {

        all_names.put(fd.getName(), (long) fd.getNumber());
        all_numbers.add((long) fd.getNumber());

        // alias extension
        if (fd.getOptions().hasExtension(Xresloader.fieldAlias)) {
            String alias_name = fd.getOptions().getExtension(Xresloader.fieldAlias);
            if (!alias_name.isEmpty()) {
                all_names.put(alias_name, (long) fd.getNumber());
            }
        }
    }
}
 

private void writeOptionForBlock(
    Descriptors.FieldDescriptor fieldDescriptor, Object value, int indent, String optionType) {
  indent(indent);
  writer.print("option ");
  if (fieldDescriptor.getFullName().startsWith("google.protobuf." + optionType + "Options")) {
    writer.print(fieldDescriptor.getName());
  } else {
    writer.print("(");
    writer.print(fieldDescriptor.getFullName());
    writer.print(")");
  }
  writer.print(" = ");
  if (fieldDescriptor.getType() == Descriptors.FieldDescriptor.Type.MESSAGE) {
    writeMessageValue((Message) value, indent);
  } else {
    writeValue(fieldDescriptor, value);
  }
  writer.println(";");
}
 

static Descriptors.FileDescriptor try_get_inner_deile_desc(String name) {
    if (inner_file_descs != null) {
        return inner_file_descs.getOrDefault(name.replace('\\', '/').toLowerCase(), null);
    }

    Descriptors.FileDescriptor[] inner_descs = new Descriptors.FileDescriptor[] { Xresloader.getDescriptor(),
            XresloaderUe.getDescriptor(), PbHeaderV3.getDescriptor(), DescriptorProtos.getDescriptor(),
            DurationProto.getDescriptor(), TimestampProto.getDescriptor(), AnyProto.getDescriptor(),
            ApiProto.getDescriptor(), EmptyProto.getDescriptor(), FieldMaskProto.getDescriptor(),
            StructProto.getDescriptor(), TypeProto.getDescriptor(), WrappersProto.getDescriptor(),
            SourceContextProto.getDescriptor(), };

    inner_file_descs = new HashMap<String, Descriptors.FileDescriptor>();
    for (Descriptors.FileDescriptor innerFileDesc : inner_descs) {
        inner_file_descs.put(innerFileDesc.getName().replace('\\', '/').toLowerCase(), innerFileDesc);
    }

    return inner_file_descs.getOrDefault(name.toLowerCase(), null);
}
 

static private LinkedList<DataVerifyImpl> setup_verifier(Descriptors.Descriptor container,
        Descriptors.OneofDescriptor fd) {
    LinkedList<DataVerifyImpl> ret = new LinkedList<DataVerifyImpl>();

    String rule = String.format("%s.%s.%s", container.getFile().getPackage(), container.getName(), fd.getName());
    if (rule.length() > 0 && rule.charAt(0) == '.') {
        rule = rule.substring(1);
    }
    {
        DataVerifyImpl vfy = cachePbs.identifiers.getOrDefault(rule, null);
        // 命中缓存
        if (null != vfy) {
            ret.add(vfy);
            return ret;
        }
    }

    DataVerifyPbOneof new_vfy = new DataVerifyPbOneof(fd);
    cachePbs.identifiers.put(rule, new_vfy);
    ret.add(new_vfy);

    return ret;
}
 

private Serde.Schema toSchemaProto(Descriptors.FileDescriptor file) {
    Serde.Schema.Builder b = Serde.Schema.newBuilder();
    b.setFile(file.toProto());
    for (Descriptors.FileDescriptor d : file.getDependencies()) {
        b.addImport(toSchemaProto(d));
    }
    return b.build();
}
 

private static void handleMapField(
    Record record,
    Field field,
    String fieldPath,
    Map<String, Set<Descriptors.FieldDescriptor>> messageTypeToExtensionMap,
    Map<String, Object> defaultValueMap,
    Descriptors.FieldDescriptor fieldDescriptor,
    DynamicMessage.Builder builder
) throws DataGeneratorException {
  Descriptors.Descriptor mapEntryDescriptor = fieldDescriptor.getMessageType();
  // MapEntry contains key and value fields
  Map<String, Field> sdcMapField = field.getValueAsMap();
  for (Map.Entry<String, Field> entry : sdcMapField.entrySet()) {
    builder.addRepeatedField(fieldDescriptor, DynamicMessage.newBuilder(mapEntryDescriptor)
        .setField(mapEntryDescriptor.findFieldByName(KEY), entry.getKey())
        .setField(
            mapEntryDescriptor.findFieldByName(VALUE),
            getValue(
                mapEntryDescriptor.findFieldByName(VALUE),
                entry.getValue(),
                record,
                fieldPath + FORWARD_SLASH + entry.getKey(),
                messageTypeToExtensionMap,
                defaultValueMap
            )
        )
        .build()
    );
  }
}
 

private static Map<String, Descriptors.FieldDescriptor> toMap4FieldDescriptor(
    Collection<Descriptors.FieldDescriptor> in) {
  Map<String, Descriptors.FieldDescriptor> out = new HashMap<>();
  in.forEach(
      descriptor -> {
        out.put(String.valueOf(descriptor.getNumber()), descriptor);
      });
  return out;
}
 

private FieldChangeInfo diffField(
    Descriptors.FieldDescriptor f_ref, Descriptors.FieldDescriptor f_new) {
  diffOptionsFromField(f_ref, f_new);
  FieldChangeInfo.Builder builder = FieldChangeInfo.newBuilder();

  if (!f_ref.getName().equals(f_new.getName())) {
    builder.setChangeType(ChangeType.CHANGED);
    builder.setFromName(f_ref.getName());
    builder.setToName(f_new.getName());
  }

  if (!f_ref.getType().equals(f_new.getType())) {
    builder.setChangeType(ChangeType.CHANGED);
    builder.setFromTypeValue(f_ref.getType().toProto().getNumber());
    builder.setToTypeValue(f_new.getType().toProto().getNumber());
    if (f_ref.getType().equals(Descriptors.FieldDescriptor.Type.MESSAGE)) {
      builder.setFromTypeName(f_ref.getMessageType().getFullName());
    }
    if (f_new.getType().equals(Descriptors.FieldDescriptor.Type.MESSAGE)) {
      builder.setFromTypeName(f_new.getMessageType().getFullName());
    }
  } else if (f_ref.getType().equals(Descriptors.FieldDescriptor.Type.MESSAGE)
      && !f_ref.getMessageType().getFullName().equals(f_new.getMessageType().getFullName())) {
    builder.setChangeType(ChangeType.CHANGED);
    builder.setFromTypeName(f_ref.getMessageType().getFullName());
    builder.setToTypeName(f_new.getMessageType().getFullName());
  }

  if (isDeprecated(f_ref) != isDeprecated(f_new)) {
    builder.setChangeType(ChangeType.CHANGED);
    builder.setFromDeprecated(isDeprecated(f_ref));
    builder.setToDeprecated(isDeprecated(f_new));
  }
  if (builder.getChangeType().equals(ChangeType.CHANGED)) {
    return builder.build();
  }
  return null;
}
 

protected SyntheticRecordType(@Nonnull RecordMetaData metaData, @Nonnull Descriptors.Descriptor descriptor,
                              @Nonnull KeyExpression primaryKey, @Nonnull Object recordTypeKey,
                              @Nonnull List<Index> indexes, @Nonnull List<Index> multiTypeIndexes,
                              @Nonnull List<C> constituents) {
    super(metaData, descriptor, primaryKey, indexes, multiTypeIndexes, null, recordTypeKey);
    this.constituents = constituents;
}
 

private HashMap<String, Integer> getMessageNameToIndexMap(
    Descriptors.FileDescriptor fileDescriptor) {
  HashMap<String, Integer> indexMap = new HashMap<>();
  for (int i = 0; i < fileDescriptor.getMessageTypes().size(); i++) {
    Descriptors.Descriptor descriptor = fileDescriptor.getMessageTypes().get(i);
    indexMap.put(descriptor.getFullName(), i);
  }
  return indexMap;
}
 

private Report lintMessage(Descriptors.Descriptor d) throws IOException {
  ProtoDomain pd = ProtoDomain.buildFrom(d);
  String message = d.getFullName();

  ValidationResults results = new ValidationResults();
  ProtoLint lint = new ProtoLint(pd, results);
  lint.lintOnMessage(message);
  return results.createProto();
}
 

private void updateRecordType(@Nonnull Map<String, RecordTypeBuilder> oldRecordTypes,
                              @Nonnull Descriptors.Descriptor oldDescriptor,
                              @Nonnull Descriptors.Descriptor newDescriptor) {
    // Create a new record type based off the old one
    RecordTypeBuilder oldRecordType = oldRecordTypes.get(oldDescriptor.getName());
    RecordTypeBuilder newRecordType = new RecordTypeBuilder(newDescriptor, oldRecordType);
    recordTypes.put(newRecordType.getName(), newRecordType); // update the record type builder
}
 

public void lintOnService(Descriptors.ServiceDescriptor service) {
  String name = service.getName();
  if (!isPascalCase(name)) {
    results.addResult(
        service,
        RuleInfo.newBuilder()
            .setLintRule(LintRule.LINT_SERVICE_NAME_SHOULD_BE_PASCAL)
            .setCode(String.format("L%d/00", LintRule.LINT_SERVICE_NAME_SHOULD_BE_PASCAL_VALUE))
            .build());
  }

  service.getMethods().forEach(m -> lintMethod(m));
}
 

/**
 * 解析字段属性
 * 字段分为 primitive integer(int32, int64), float, double, string,
 * object类型 array类型
 * object类型指向 lookupTable里的字段, 并使用$ref表示引用
 * array类型，type是array,具体item是字段类型
 */
public void processMessageFields() {
    typeLookupTable.forEach((typeName, definitionType) -> {
        Descriptor protocolDescriptor = definitionType.getProtocolDescriptor();
        Map<String, FieldProperty> properties = definitionType.getProperties();
        List<Descriptors.FieldDescriptor> fields = protocolDescriptor.getFields();
        fields.forEach(fieldDescriptor -> {
            FieldProperty fieldProperty = parseFieldProperty(fieldDescriptor);
            properties.put(fieldDescriptor.getName(), fieldProperty);
        });
    });
}
 

@Nonnull
private FDBMetaDataStore createMetaDataStore(@Nonnull FDBRecordContext context, @Nonnull KeySpacePath metaDataPath,
                                             @Nonnull Subspace metaDataSubspace,
                                             @Nullable Descriptors.FileDescriptor localFileDescriptor) {
    FDBMetaDataStore metaDataStore = new FDBMetaDataStore(context, metaDataPath);
    metaDataStore.setMaintainHistory(false);
    assertEquals(metaDataSubspace, metaDataStore.getSubspace());
    metaDataStore.setDependencies(new Descriptors.FileDescriptor[]{RecordMetaDataOptionsProto.getDescriptor()});
    metaDataStore.setLocalFileDescriptor(localFileDescriptor);
    return metaDataStore;
}
 

/**
 * Fills lookup structure for translating between parquet enum values and Protocol buffer enum values.
 * */
private Map<Binary, Descriptors.EnumValueDescriptor> makeLookupStructure(Descriptors.FieldDescriptor enumFieldType) {
  Descriptors.EnumDescriptor enumType = enumFieldType.getEnumType();
  Map<Binary, Descriptors.EnumValueDescriptor> lookupStructure = new HashMap<Binary, Descriptors.EnumValueDescriptor>();

  List<Descriptors.EnumValueDescriptor> enumValues = enumType.getValues();

  for (Descriptors.EnumValueDescriptor value : enumValues) {
    String name = value.getName();
    lookupStructure.put(Binary.fromString(name), enumType.findValueByName(name));
  }

  return lookupStructure;
}