private MethodMetadataBuilder getIdMethod(
     String declaredById, JavaType targetType, MethodMetadata idAccessor) {
   InvocableMemberBodyBuilder invocableMemberBodyBuilder =
       InvocableMemberBodyBuilder.getInstance();
   invocableMemberBodyBuilder.append(
       "return "
           + StringUtils.uncapitalize(targetType.getSimpleTypeName())
           + "."
           + idAccessor.getMethodName()
           + "();");
   MethodMetadataBuilder getIdMethod =
       new MethodMetadataBuilder(
           declaredById,
           Modifier.PUBLIC,
           new JavaSymbolName("getId"),
           GwtUtils.convertPrimitiveType(idAccessor.getReturnType(), true),
           invocableMemberBodyBuilder);
   getIdMethod.addParameter(StringUtils.uncapitalize(targetType.getSimpleTypeName()), targetType);
   return getIdMethod;
 }
  public MetadataItem get(String metadataIdentificationString) {
    ProjectMetadata projectMetadata = projectOperations.getProjectMetadata();
    if (projectMetadata == null) {
      return null;
    }

    ClassOrInterfaceTypeDetails proxy = getGovernor(metadataIdentificationString);
    if (proxy == null) {
      return null;
    }

    AnnotationMetadata proxyAnnotation =
        GwtUtils.getFirstAnnotation(proxy, GwtUtils.PROXY_ANNOTATIONS);
    if (proxyAnnotation == null) {
      return null;
    }

    String locatorType = GwtUtils.getStringValue(proxyAnnotation.getAttribute("locator"));
    if (!StringUtils.hasText(locatorType)) {
      return null;
    }

    ClassOrInterfaceTypeDetails entity = gwtTypeService.lookupEntityFromProxy(proxy);
    if (entity == null) {
      return null;
    }

    MethodMetadata idAccessor = persistenceMemberLocator.getIdentifierAccessor(entity.getName());
    MethodMetadata versionAccessor = persistenceMemberLocator.getVersionAccessor(entity.getName());
    if (idAccessor == null || versionAccessor == null) {
      return null;
    }

    final JavaType idType = GwtUtils.convertPrimitiveType(idAccessor.getReturnType(), true);
    String locatorIdentifier = PhysicalTypeIdentifier.createIdentifier(new JavaType(locatorType));
    ClassOrInterfaceTypeDetailsBuilder locatorBuilder =
        new ClassOrInterfaceTypeDetailsBuilder(locatorIdentifier);
    AnnotationMetadataBuilder annotationMetadataBuilder =
        new AnnotationMetadataBuilder(RooJavaType.ROO_GWT_LOCATOR);
    annotationMetadataBuilder.addStringAttribute(
        "value", entity.getName().getFullyQualifiedTypeName());
    locatorBuilder.addAnnotation(annotationMetadataBuilder);
    annotationMetadataBuilder = new AnnotationMetadataBuilder(SpringJavaType.COMPONENT);
    locatorBuilder.addAnnotation(annotationMetadataBuilder);
    locatorBuilder.setName(new JavaType(locatorType));
    locatorBuilder.setModifier(Modifier.PUBLIC);
    locatorBuilder.setPhysicalTypeCategory(PhysicalTypeCategory.CLASS);
    locatorBuilder.addExtendsTypes(
        new JavaType(
            GwtUtils.LOCATOR.getFullyQualifiedTypeName(),
            0,
            DataType.TYPE,
            null,
            Arrays.asList(entity.getName(), idType)));
    locatorBuilder.addMethod(getCreateMethod(locatorIdentifier, entity.getName()));
    locatorBuilder.addMethod(
        getFindMethod(locatorBuilder, locatorIdentifier, entity.getName(), idType));
    locatorBuilder.addMethod(getDomainTypeMethod(locatorIdentifier, entity.getName()));
    locatorBuilder.addMethod(getIdMethod(locatorIdentifier, entity.getName(), idAccessor));
    locatorBuilder.addMethod(getIdTypeMethod(locatorIdentifier, entity.getName(), idType));
    locatorBuilder.addMethod(
        getVersionMethod(locatorIdentifier, entity.getName(), versionAccessor));

    typeManagementService.createOrUpdateTypeOnDisk(locatorBuilder.build());
    return null;
  }