小编Dar*_*rio的帖子

我正在处理Google Protobuf消息.

由于我的需求来设置一个对象(其中有些是Protobuff消息)的实例字段中,我写道,通过反射检索建设者,并通过一个函数的protobuf-java的格式再现的消息.

这是代码

for (String aFieldName : objectContentMap.keySet()) {
 Object aFieldNameValue = objectContentMap.get(aFieldName);
 if (aFieldNameValue != null) {
  Field theClassField = this.instance.getField(aFieldName);
  ReflectionUtils.makeAccessible(theClassField);
  Class<?> classType = theClassField.getType();
  if (!classType.isPrimitive() && 
   GeneratedMessage.class.isAssignableFrom(classType.getSuperclass())) {
   Method method = classType.getMethod("newBuilder");
   // Since the method is static, the instance object that undergoes the call is not important, but with "null" I have a NPE...
   Object builder = method.invoke(new Object()); 
   if (builder instanceof Builder) {
    Builder newBuilder = (Builder)builder;
    InputStream asd = new …