/**
     * Here we will modify serializer such that it has two modes: default handling when no JsonView
     * is enabled; and other (custom) when viess are enabled. Note that we could also just have
     * forced serialization for all cases.
     */
    @Override
    protected void processViews(SerializationConfig config, BeanSerializerBuilder builder) {
      // Let's use default serializer modification as the baseline
      super.processViews(config, builder);

      /* And only change handling of that one bean (more likely,
       * you would want to handle all classes in a package, or with
       * some name -- this would be less work than having separate
       * custom serializer for all classes)
       */
      BasicBeanDescription beanDesc = builder.getBeanDescription();
      if (beanDesc.getBeanClass() == Bean.class) {
        List<BeanPropertyWriter> props = builder.getProperties();
        BeanPropertyWriter[] writers = props.toArray(new BeanPropertyWriter[props.size()]);
        for (int i = 0; i < writers.length; ++i) {
          String pname = writers[i].getName();
          if ("secret".equals(pname)) {
            // remove serializer, filters it out
            writers[i] = null;
          } else if ("name".equals(pname)) {
            // This one we'll just upper case for fun
            writers[i] = new UpperCasingWriter(writers[i]);
          }
        }
        // Important: update builder with filtered property definitions
        builder.setFilteredProperties(writers);
      }
    }
示例#2
0
  public void testJackson428() throws Exception {
    ObjectMapper serMapper = new ObjectMapper();

    TypeResolverBuilder<?> serializerTyper =
        new ObjectMapper.DefaultTypeResolverBuilder(ObjectMapper.DefaultTyping.NON_FINAL);
    serializerTyper = serializerTyper.init(JsonTypeInfo.Id.NAME, createTypeNameIdResolver(true));
    serializerTyper = serializerTyper.inclusion(JsonTypeInfo.As.PROPERTY);
    serMapper.setDefaultTyping(serializerTyper);

    // Let's start by constructing something to serialize first
    MapHolder holder = new MapHolder();
    holder.map = new HashMap<MapKey, List<Object>>();
    List<Object> ints = new ArrayList<Object>();
    ints.add(Integer.valueOf(3));
    holder.map.put(new MapKey("key"), ints);
    String json = serMapper.writeValueAsString(holder);

    // Then deserialize: need separate mapper to initialize type id resolver appropriately
    ObjectMapper deserMapper = new ObjectMapper();
    TypeResolverBuilder<?> deserializerTyper =
        new ObjectMapper.DefaultTypeResolverBuilder(ObjectMapper.DefaultTyping.NON_FINAL);
    deserializerTyper =
        deserializerTyper.init(JsonTypeInfo.Id.NAME, createTypeNameIdResolver(false));
    deserializerTyper = deserializerTyper.inclusion(JsonTypeInfo.As.PROPERTY);
    deserMapper.setDefaultTyping(deserializerTyper);

    MapHolder result = deserMapper.readValue(json, MapHolder.class);
    assertNotNull(result);
    Map<?, ?> map = result.map;
    assertEquals(1, map.size());
    Map.Entry<?, ?> entry = map.entrySet().iterator().next();
    Object key = entry.getKey();
    assertEquals(MapKey.class, key.getClass());
    Object value = entry.getValue();
    assertTrue(value instanceof List<?>);
    List<?> list = (List<?>) value;
    assertEquals(1, list.size());
    assertEquals(Integer.class, list.get(0).getClass());
    assertEquals(Integer.valueOf(3), list.get(0));
  }