/**
* Helper method that will check whether given annotated entity (usually class, but may also be a
* property accessor) indicates that a {@link Converter} is to be used; and if so, to construct
* and return suitable serializer for it. If not, will simply return given serializer as is.
*/
protected JsonDeserializer<Object> findConvertingDeserializer(
DeserializationContext ctxt, Annotated a, JsonDeserializer<Object> deser)
throws JsonMappingException {
Converter<Object, Object> conv = findConverter(ctxt, a);
if (conv == null) {
return deser;
}
JavaType delegateType = conv.getInputType(ctxt.getTypeFactory());
return (JsonDeserializer<Object>)
new StdDelegatingDeserializer<Object>(conv, delegateType, deser);
}
/**
* Method that does the heavy lifting of checking for per-type annotations, find out full type,
* and figure out which actual factory method to call.
*/
@SuppressWarnings("unchecked")
protected JsonDeserializer<Object> _createDeserializer(
DeserializationContext ctxt, DeserializerFactory factory, JavaType type)
throws JsonMappingException {
final DeserializationConfig config = ctxt.getConfig();
// First things first: do we need to use abstract type mapping?
if (type.isAbstract() || type.isMapLikeType() || type.isCollectionLikeType()) {
type = factory.mapAbstractType(config, type);
}
BeanDescription beanDesc = config.introspect(type);
// Then: does type define explicit deserializer to use, with annotation(s)?
JsonDeserializer<Object> deser = findDeserializerFromAnnotation(ctxt, beanDesc.getClassInfo());
if (deser != null) {
return deser;
}
// If not, may have further type-modification annotations to check:
JavaType newType = modifyTypeByAnnotation(ctxt, beanDesc.getClassInfo(), type);
if (newType != type) {
type = newType;
beanDesc = config.introspect(newType);
}
// We may also have a Builder type to consider...
Class<?> builder = beanDesc.findPOJOBuilder();
if (builder != null) {
return (JsonDeserializer<Object>)
factory.createBuilderBasedDeserializer(ctxt, type, beanDesc, builder);
}
// Or perhaps a Converter?
Converter<Object, Object> conv = beanDesc.findDeserializationConverter();
if (conv == null) { // nope, just construct in normal way
return (JsonDeserializer<Object>) _createDeserializer2(ctxt, factory, type, beanDesc);
}
// otherwise need to do bit of introspection
JavaType delegateType = conv.getInputType(ctxt.getTypeFactory());
return new StdDelegatingDeserializer<Object>(
conv, delegateType, _createDeserializer2(ctxt, factory, delegateType, beanDesc));
}
