private List<HttpMessageConverter<?>> potentiallyRegisterModule(
List<HttpMessageConverter<?>> converters) {
for (HttpMessageConverter<?> converter : converters) {
if (converter instanceof MappingJackson2HttpMessageConverter) {
MappingJackson2HttpMessageConverter halConverterCandidate =
(MappingJackson2HttpMessageConverter) converter;
ObjectMapper objectMapper = halConverterCandidate.getObjectMapper();
if (Jackson2HalModule.isAlreadyRegisteredIn(objectMapper)) {
return converters;
}
}
}
CurieProvider curieProvider = getCurieProvider(beanFactory);
RelProvider relProvider =
beanFactory.getBean(DELEGATING_REL_PROVIDER_BEAN_NAME, RelProvider.class);
ObjectMapper halObjectMapper =
beanFactory.getBean(HAL_OBJECT_MAPPER_BEAN_NAME, ObjectMapper.class);
MessageSourceAccessor linkRelationMessageSource =
beanFactory.getBean(MESSAGE_SOURCE_BEAN_NAME, MessageSourceAccessor.class);
halObjectMapper.registerModule(new Jackson2HalModule());
halObjectMapper.setHandlerInstantiator(
new Jackson2HalModule.HalHandlerInstantiator(
relProvider, curieProvider, linkRelationMessageSource));
MappingJackson2HttpMessageConverter halConverter =
new TypeConstrainedMappingJackson2HttpMessageConverter(ResourceSupport.class);
halConverter.setSupportedMediaTypes(Arrays.asList(HAL_JSON));
halConverter.setObjectMapper(halObjectMapper);
List<HttpMessageConverter<?>> result =
new ArrayList<HttpMessageConverter<?>>(converters.size());
result.add(halConverter);
result.addAll(converters);
return result;
}
/**
* Configure an existing {@link ObjectMapper} instance with this builder's settings. This can be
* applied to any number of {@code ObjectMappers}.
*
* @param objectMapper the ObjectMapper to configure
*/
@SuppressWarnings("deprecation")
public void configure(ObjectMapper objectMapper) {
Assert.notNull(objectMapper, "ObjectMapper must not be null");
if (this.findModulesViaServiceLoader) {
// Jackson 2.2+
objectMapper.registerModules(ObjectMapper.findModules(this.moduleClassLoader));
} else if (this.findWellKnownModules) {
registerWellKnownModulesIfAvailable(objectMapper);
}
if (this.modules != null) {
for (Module module : this.modules) {
// Using Jackson 2.0+ registerModule method, not Jackson 2.2+ registerModules
objectMapper.registerModule(module);
}
}
if (this.moduleClasses != null) {
for (Class<? extends Module> module : this.moduleClasses) {
objectMapper.registerModule(BeanUtils.instantiate(module));
}
}
if (this.dateFormat != null) {
objectMapper.setDateFormat(this.dateFormat);
}
if (this.locale != null) {
objectMapper.setLocale(this.locale);
}
if (this.timeZone != null) {
objectMapper.setTimeZone(this.timeZone);
}
if (this.annotationIntrospector != null) {
objectMapper.setAnnotationIntrospector(this.annotationIntrospector);
}
if (this.propertyNamingStrategy != null) {
objectMapper.setPropertyNamingStrategy(this.propertyNamingStrategy);
}
if (this.serializationInclusion != null) {
objectMapper.setSerializationInclusion(this.serializationInclusion);
}
if (this.filters != null) {
// Deprecated as of Jackson 2.6, but just in favor of a fluent variant.
objectMapper.setFilters(this.filters);
}
for (Class<?> target : this.mixIns.keySet()) {
// Deprecated as of Jackson 2.5, but just in favor of a fluent variant.
objectMapper.addMixInAnnotations(target, this.mixIns.get(target));
}
if (!this.serializers.isEmpty() || !this.deserializers.isEmpty()) {
SimpleModule module = new SimpleModule();
addSerializers(module);
addDeserializers(module);
objectMapper.registerModule(module);
}
customizeDefaultFeatures(objectMapper);
for (Object feature : this.features.keySet()) {
configureFeature(objectMapper, feature, this.features.get(feature));
}
if (this.handlerInstantiator != null) {
objectMapper.setHandlerInstantiator(this.handlerInstantiator);
} else if (this.applicationContext != null) {
objectMapper.setHandlerInstantiator(
new SpringHandlerInstantiator(this.applicationContext.getAutowireCapableBeanFactory()));
}
}