bla.java

public class CustomRepositoryRestMvcConfiguration 
	extends RepositoryRestMvcConfiguration {
		
	@Override
	protected void configureJacksonObjectMapper(ObjectMapper objectMapper) {
		
		SimpleModule longModule = new SimpleModule("LongDeserializerModule", new Version(1, 0, 0, null));
		longModule.addDeserializer(Long.class, new LongJsonDeserializer());
			
		SimpleModule bigIntegerModule = new SimpleModule("BigIntegerDeserializerModule", new Version(1, 0, 0, null));
		longModule.addDeserializer(Long.class, new LongJsonDeserializer());
			
		objectMapper.registerModules(longModule, bigIntegerModule);
	}
	.....