Java example source code file (GraphConstants.java)

This example Java source code file (GraphConstants.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

adding_parallel_edge, cannot, default_edge_count, default_node_count, edge, edge_already_exists, endpoints_graph_directedness, expected_degree, graphconstants, network, node_not_in_graph, self_loops_not_allowed, string, the

The GraphConstants.java Java example source code

/*
 * Copyright (C) 2016 The Guava Authors
 *
 * 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.google.common.graph;

/**
 * A utility class to hold various constants used by the Guava Graph library.
 */
final class GraphConstants {

  private GraphConstants() {}

  static final int EXPECTED_DEGREE = 2;

  static final int DEFAULT_NODE_COUNT = 10;
  static final int DEFAULT_EDGE_COUNT = DEFAULT_NODE_COUNT * EXPECTED_DEGREE;

  // Error messages
  static final String NODE_NOT_IN_GRAPH = "Node %s is not an element of this graph.";
  static final String EDGE_NOT_IN_GRAPH = "Edge %s is not an element of this graph.";
  static final String REUSING_EDGE =
      "Edge %s already exists between the following nodes: %s, "
          + "so it can't be reused to connect the following nodes: %s.";
  static final String ADDING_PARALLEL_EDGE =
      "Nodes %s and %s are already connected by a different edge.";
  static final String EDGE_ALREADY_EXISTS = "Edge %s already exists in the graph.";
  static final String SELF_LOOPS_NOT_ALLOWED =
      "Cannot add self-loop edge on node %s, as self-loops are not allowed.";
  static final String NOT_AVAILABLE_ON_UNDIRECTED =
      "Cannot call source()/target() on undirected endpoints.";
  static final String ENDPOINTS_GRAPH_DIRECTEDNESS =
      "The endpoints' directedness (isDirected = %s) does not match the graph's directedness "
          + "(isDirected = %s). A graph cannot have both directed and undirected edges.";
  static final String NETWORK_WITH_PARALLEL_EDGE =
      "Cannot make a Graph copy of a Network that allows parallel edges.";
}