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How to access default jackson serialization in a custom serializer

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梦如初夏
梦如初夏 2020-12-05 10:15

I want to create a custom serializer which does a tiny bit of work and then leaves the rest for default serialization.

For example:

@JsonSerialize(u
4条回答
  • 甜味超标
    甜味超标 (楼主)
    2020-12-05 10:55

    A BeanSerializerModifier will provide you access to the default serialization.

    Inject a default serializer into the custom serializer

    public class MyClassSerializer extends JsonSerializer {
    private final JsonSerializer defaultSerializer;

    public MyClassSerializer(JsonSerializer defaultSerializer) {
        this.defaultSerializer = checkNotNull(defaultSerializer);
    }

    @Override
    public void serialize(MyClass myclass, JsonGenerator gen, SerializerProvider provider) throws IOException {
        if (myclass.getSomeProperty() == true) {
            provider.setAttribute("special", true);
        }
        defaultSerializer.serialize(myclass, gen, provider);
    }
}



    Create a BeanSerializerModifier for MyClass
    


    public class MyClassSerializerModifier extends BeanSerializerModifier {
    @Override
    public JsonSerializer modifySerializer(SerializationConfig config, BeanDescription beanDesc, JsonSerializer serializer) {
        if (beanDesc.getBeanClass() == MySpecificClass.class) {
            return new MyClassSerializer((JsonSerializer) serializer);
        }
        return serializer;
    }
}



    Register the serializer modifier
    


    ObjectMapper om = new ObjectMapper()
        .registerModule(new SimpleModule()
                .setSerializerModifier(new MyClassSerializerModifier()));

    
    
    
             
    
                                                        
    
            
            
    
              
                
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