server/protocols/jmap-draft/src/main/java/org/apache/james/jmap/draft/json/OptionalZonedDateTimeDeserializer.java

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package org.apache.james.jmap.draft.json;

import java.io.IOException;
import java.time.ZonedDateTime;
import java.util.Optional;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;

public class OptionalZonedDateTimeDeserializer extends JsonDeserializer<Optional<ZonedDateTime>> {

    @Override
    public Optional<ZonedDateTime> deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException {
        return Optional.ofNullable(jsonParser.getValueAsString())
            .map(ZonedDateTime::parse);
    }
}