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.io.IOException;
import java.util.Collection;
public class CustomStringCollectionDeserializer extends StringCollectionDeserializer {
public CustomStringCollectionDeserializer(JavaType collectionType) {
super(collectionType);
}
@Override
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)));
mapper.registerModule(module);
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.