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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.query;

import com.fasterxml.jackson.annotation.JsonSubTypes;
import com.fasterxml.jackson.annotation.JsonTypeInfo;

import java.util.List;

@JsonTypeInfo(use = JsonTypeInfo.Id.NAME,
              include = JsonTypeInfo.As.PROPERTY,
              property = "type",
              defaultImpl = LegacyDataSource.class)
@JsonSubTypes({
                  @JsonSubTypes.Type(value = TableDataSource.class, name = "table"),
                  @JsonSubTypes.Type(value = QueryDataSource.class, name = "query"),
                  @JsonSubTypes.Type(value = UnionDataSource.class, name = "union")
              })
public interface DataSource
{
  public List getNames();
}