杰克逊自定义解串器委托恢复为默认值 [英] Jackson custom deserialiser delegate back to default one

问题描述

在自定义的Jackson解串器中，是否可以将某些属性委派回默认的解串器?

In a custom Jackson deserialiser, is there a way to delegate certain properties back to the default deserialiser?

@Override
public final T deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
    ObjectNode node = jp.getCodec().readTree(jp);

    T type = createType();
    //custom deserialise some fields here
    ...

    // Is there a way to delegate everything else back to Jackson?

    ObjectNode nodeToDelegate = node.get("someField");
    // delegate back to jackson and deserialise into `type`
    // nodeToDelegate can be anything - Number / Object / Array / etc.
}

p.s.我确实需要自定义反序列化器，并且不能使用类型注释.

p.s. I do need custom deserialiser and cannot use type annotations.

推荐答案

您可以使用以下代码来实现这一目标.

You can use following code to achieve this.

JsonParser parser = nodeToDelegate.traverse();
parser.setCodec(jp.getCodec());
parser.readValueAs(<Type>.class);

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