private void serialize(Serializer serializer, Collection<EntityType> models) {
    for (EntityType model : models) {
      try {
        Type type = conf.getTypeMappings().getPathType(model, model, true);
        String packageName = type.getPackageName();
        String className =
            !packageName.isEmpty()
                ? (packageName + "." + type.getSimpleName())
                : type.getSimpleName();

        // skip if type is excluded class or in excluded package
        if (conf.isExcludedPackage(model.getPackageName())
            || conf.isExcludedClass(model.getFullName())) {
          continue;
        }

        Set<TypeElement> elements = context.typeElements.get(model.getFullName());

        if (elements == null) {
          elements = new HashSet<TypeElement>();
        }
        for (Property property : model.getProperties()) {
          if (property.getType().getCategory() == TypeCategory.CUSTOM) {
            Set<TypeElement> customElements =
                context.typeElements.get(property.getType().getFullName());
            if (customElements != null) {
              elements.addAll(customElements);
            }
          }
        }

        processingEnv
            .getMessager()
            .printMessage(Kind.NOTE, "Generating " + className + " for " + elements);
        JavaFileObject fileObject =
            processingEnv
                .getFiler()
                .createSourceFile(className, elements.toArray(new Element[elements.size()]));
        Writer writer = fileObject.openWriter();
        try {
          SerializerConfig serializerConfig = conf.getSerializerConfig(model);
          serializer.serialize(model, serializerConfig, new JavaWriter(writer));
        } finally {
          if (writer != null) {
            writer.close();
          }
        }

      } catch (IOException e) {
        System.err.println(e.getMessage());
        processingEnv.getMessager().printMessage(Kind.ERROR, e.getMessage());
      }
    }
  }
 private void serialize(Map<String, EntityType> types, Serializer serializer) throws IOException {
   for (EntityType entityType : types.values()) {
     if (serialized.add(entityType)) {
       Type type = typeMappings.getPathType(entityType, entityType, true);
       String packageName = type.getPackageName();
       String className =
           packageName.length() > 0
               ? (packageName + "." + type.getSimpleName())
               : type.getSimpleName();
       write(serializer, className.replace('.', '/') + ".java", entityType);
     }
   }
 }