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A module that is everything required to understands Druid Segments

There is a newer version: 0.12.3

/*
 * Licensed to Metamarkets Group Inc. (Metamarkets) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Metamarkets licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package io.druid.jackson;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.dataformat.smile.SmileFactory;
import com.fasterxml.jackson.dataformat.smile.SmileGenerator;
import com.google.inject.Binder;
import com.google.inject.Key;
import com.google.inject.Module;
import com.google.inject.Provides;
import io.druid.guice.LazySingleton;
import io.druid.guice.annotations.Json;
import io.druid.guice.annotations.Smile;

/**
 */
public class JacksonModule implements Module
{
  @Override
  public void configure(Binder binder)
  {
    binder.bind(ObjectMapper.class).to(Key.get(ObjectMapper.class, Json.class));
  }

  @Provides @LazySingleton @Json
  public ObjectMapper jsonMapper()
  {
    return new DefaultObjectMapper();
  }

  @Provides @LazySingleton @Smile
  public ObjectMapper smileMapper()
  {
    final SmileFactory smileFactory = new SmileFactory();
    smileFactory.configure(SmileGenerator.Feature.ENCODE_BINARY_AS_7BIT, false);
    smileFactory.delegateToTextual(true);
    final ObjectMapper retVal = new DefaultObjectMapper(smileFactory);
    retVal.getFactory().setCodec(retVal);
    return retVal;
  }
}