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jackson-databind

How to enable ALLOW_NON_NUMERIC_NUMBERS with Jackson ObjectMapper 2.12?

This line of code gives a deprecation warning:

mapper.configure(JsonParser.Feature.ALLOW_NON_NUMERIC_NUMBERS, true);

And this doesn't compile

mapper.configure(JsonReadFeature.ALLOW_NON_NUMERIC_NUMBERS, true);

because JsonReadFeature.ALLOW_NON_NUMERIC_NUMBERS not a subclass of any of the four Feature types ObjectMapper supports.

What is the correct was to enable this feature with Jackson 2.12?

Solution

  • There doesn't seem to be any API that accepts JacksonFeature or JsonReadFeature as parameter.

    DeserializationConfig accepts FormatFeature as parameter but you can't change this property of ObjectMapper after getting a new instance by calling withFeatures().

    The only solutions seems to be to get the feature out of the JsonReadFeature which is then no longer deprecated:

    mapper.enable(JsonReadFeature.ALLOW_NON_NUMERIC_NUMBERS.mappedFeature());

    (note the method call at the end of the enum).