com.fasterxml.jackson.databind.SerializerProvider#constructSpecializedType ( )源码实例Demo

@Override
protected JsonSerializer<Object> _findAndAddDynamic(PropertySerializerMap map,
        Class<?> type, SerializerProvider provider) throws JsonMappingException
{
    JsonSerializer<Object> serializer;
    if (_nonTrivialBaseType != null) {
        JavaType subtype = provider.constructSpecializedType(_nonTrivialBaseType, type);
        serializer = provider.findValueSerializer(subtype, this);
    } else {
        serializer = provider.findValueSerializer(type, this);
    }
    NameTransformer t = _nameTransformer;
    if (serializer.isUnwrappingSerializer()) {
        t = NameTransformer.chainedTransformer(t, ((UnwrappingBeanSerializer) serializer)._nameTransformer);
    }
    serializer = serializer.unwrappingSerializer(t);
    
    _dynamicSerializers = _dynamicSerializers.newWith(type, serializer);
    return serializer;
}
 

void write(Object val, int containedTypeIndex, JsonGenerator gen, SerializerProvider provider) throws IOException {
    if (val != null) {
        if (type.containedTypeCount() > containedTypeIndex) {
            JsonSerializer<Object> ser;
            JavaType containedType = type.containedType(containedTypeIndex);
            if (containedType != null && containedType.hasGenericTypes()) {
                JavaType st = provider.constructSpecializedType(containedType, val.getClass());
                ser = provider.findTypedValueSerializer(st, true, null);
            } else {
                ser = provider.findTypedValueSerializer(val.getClass(), true, null);
            }
            ser.serialize(val, gen, provider);
        } else {
            gen.writeObject(val);
        }
    } else {
        gen.writeNull();
    }
}
 

private JavaType constructSpecializedType(SerializerProvider serializerProvider, JavaType baseType, Class<?> subclass) {
	return serializerProvider.constructSpecializedType(baseType, subclass);
}