Java InvalidFormatException-class And Method Code Example

Here is an example of how to use the InvalidFormatException class from the Jackson Databind library to handle the exception of an invalid format during deserialization:

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.exc.InvalidFormatException;


public class MyClassDeserializer extends JsonDeserializer<MyClass> {

    public MyClass deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
        try {
            ObjectMapper mapper = (ObjectMapper) p.getCodec();
            MyClass myClass = mapper.readValue(p, MyClass.class);
            return myClass;
        } catch (InvalidFormatException e) {
            // handle the exception here
            System.out.println("Invalid format for property: " + e.getPath().get(e.getPath().size() - 1).getFieldName());
            System.out.println("Value: " + e.getValue());
            System.out.println("Expected format: " + e.getTargetType());
            return null;

You can then use this custom deserializer by registering it with the ObjectMapper:

ObjectMapper mapper = new ObjectMapper();
SimpleModule module = new SimpleModule();
module.addDeserializer(MyClass.class, new MyClassDeserializer());

Then you can deserialize your JSON to MyClass as follow:

MyClass myClass = mapper.readValue(jsonString, MyClass.class);

Please note that the above example is just a skeleton code, you may need to handle the exception and add proper validation based on your use case.

The InvalidFormatException class is thrown when an invalid format is encountered during deserialization.

You can use this exception to handle the invalid format during deserialization, you can log the property name, value, expected format, and the target type.