computer-core/src/main/java/com/baidu/hugegraph/computer/core/config/EdgeFrequency.java

/*
 * Copyright 2017 HugeGraph Authors
 *
 * 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 com.baidu.hugegraph.computer.core.config;

/**
 * The frequency of edges can exist between two vertices
 */
public enum EdgeFrequency {

    /**
     * Only one edge can exist between two vertices,
     * use sourceId + targetId to identify it.
     */
    SINGLE,

    /**
     * Each edge label can exist one edge between two vertices ,
     * use sourceId + edgelabel + targetId to identify it.
     */
    SINGLE_PER_LABEL,

    /**
     * Multiple edge can exist between two vertices,
     * use sourceId + edgelabel + sortValues + targetId to identify it.
     */
    MULTIPLE
}