/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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 org.apache.giraph.edge;

import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.WritableComparable;

/**
 * Empty interface to characterize {@link OutEdges} implementations that
 * don't keep references to the Edge (or id and value) objects they are passed.
 * The Giraph infrastructure can exploit this characteristic by reusing Edge
 * objects.
 *
 * @param <I> Vertex id
 * @param <E> Edge value
 */
public interface ReuseObjectsOutEdges<I extends WritableComparable,
    E extends Writable> extends OutEdges<I, E> { }