/*
* 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.flink.graph;
/**
* These bitmasks are used by edge-flipping algorithms to mark the edge order
* relative to the original edge direction.
*/
public enum EdgeOrder {
// bitmasks from triadic census
FORWARD(0b10),
REVERSE(0b01),
MUTUAL(0b11);
private final byte bitmask;
EdgeOrder(int bitmask) {
this.bitmask = (byte)bitmask;
}
/**
* Returns a bitmask used for marking whether an edge is in the same
* direction as in the original edge set (FORWARD), is flipped relative
* to the original edge set (REVERSE), or both (MUTUAL).
*
* @return edge order bitmask
*/
public byte getBitmask() {
return bitmask;
}
}