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Converters for StoreMate datatypes, for Jackson-based JSON serialization (as well as other dataformats Jackson supports, like Smile)

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package com.fasterxml.storemate.json;

import java.io.IOException;

import com.fasterxml.jackson.core.JsonGenerationException;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;

import com.fasterxml.storemate.api.KeyRange;

/**
 * We don't absolutely need a serializer for this type, but it's
 * simple enough to do so.
 */
public class KeyRangeSerializer extends StdSerializer
{
    public KeyRangeSerializer() { super(KeyRange.class); }

    @Override
    public void serialize(KeyRange value, JsonGenerator jgen, SerializerProvider provider)
        throws IOException, JsonGenerationException
    {
        jgen.writeStartObject();
        _serialize(value, jgen, provider);
        jgen.writeEndObject();
    }

    @Override
    public void serializeWithType(KeyRange value, JsonGenerator jgen,
            SerializerProvider provider, TypeSerializer typeSer)
                    throws IOException, JsonProcessingException
    {
        typeSer.writeTypePrefixForObject(value, jgen);
        _serialize(value, jgen, provider);
        typeSer.writeTypeSuffixForObject(value, jgen);
    }

    protected void _serialize(KeyRange value, JsonGenerator jgen, SerializerProvider provider)
        throws IOException, JsonGenerationException
    {
        jgen.writeNumberField("keyspace", value.getKeyspace().getLength());
        jgen.writeNumberField("start", value.getStart());
        jgen.writeNumberField("length", value.getLength());
    }
}