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A lightweight mapping framework that maps data objects to a number of nodes, subject to constraints

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/**
 * Copyright 2013 Twitter, Inc.
 * Licensed 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 com.twitter.crunch;

import java.util.List;
import java.util.Map;

/**
 * Interface that defines a mapping function.
 */
public interface MappingFunction {
  Map> computeMapping(List data, Node topology);
}