1 /* 2 * Copyright (C) 2016 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.common.graph; 18 19 import com.google.common.base.Optional; 20 21 /** 22 * A base class for builders that construct graphs with user-defined properties. 23 * 24 * @author James Sexton 25 */ 26 abstract class AbstractGraphBuilder<N> { 27 final boolean directed; 28 boolean allowsSelfLoops = false; 29 ElementOrder<N> nodeOrder = ElementOrder.insertion(); 30 Optional<Integer> expectedNodeCount = Optional.absent(); 31 32 /** 33 * Creates a new instance with the specified edge directionality. 34 * 35 * @param directed if true, creates an instance for graphs whose edges are each directed; if 36 * false, creates an instance for graphs whose edges are each undirected. 37 */ AbstractGraphBuilder(boolean directed)38 AbstractGraphBuilder(boolean directed) { 39 this.directed = directed; 40 } 41 } 42