Java StringCollectionDeserializer-class And Method Code Example

Here is an example of how to use the StringCollectionDeserializer class from the Jackson Databind library to deserialize a collection of strings from JSON:

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.deser.std.StringCollectionDeserializer;

import java.util.Collection;

public class CustomStringCollectionDeserializer extends StringCollectionDeserializer {

    public CustomStringCollectionDeserializer(JavaType collectionType) {

    public Collection<String> deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
        Collection<String> collection = super.deserialize(p, ctxt);
        // Do some custom processing on the collection of strings
        return collection;

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

ObjectMapper mapper = new ObjectMapper();
SimpleModule module = new SimpleModule();
module.addDeserializer(Collection.class, new CustomStringCollectionDeserializer(mapper.getTypeFactory().constructCollectionType(Collection.class, String.class)));

Then you can deserialize your JSON to Collection as follow:

Collection<String> stringCollection = mapper.readValue(jsonString, new TypeReference<Collection<String>>(){});

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.