| /* |
| * Copyright (C) 2011 Google Inc. |
| * |
| * 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.inject.grapher; |
| |
| import com.google.common.base.Objects; |
| |
| /** |
| * Node in a guice dependency graph. |
| * |
| * @author bojand@google.com (Bojan Djordjevic) |
| * @since 4.0 |
| */ |
| public abstract class Node { |
| /** |
| * When set to true, the source object is ignored in {@link #equals} and {@link #hashCode}. Only |
| * used in tests. |
| */ |
| static boolean ignoreSourceInComparisons = false; |
| |
| private final NodeId id; |
| private final Object source; |
| |
| protected Node(NodeId id, Object source) { |
| this.id = id; |
| this.source = source; |
| } |
| |
| public NodeId getId() { |
| return id; |
| } |
| |
| public Object getSource() { |
| return source; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (!(obj instanceof Node)) { |
| return false; |
| } |
| Node other = (Node) obj; |
| return Objects.equal(id, other.id) |
| && (ignoreSourceInComparisons || Objects.equal(source, other.source)); |
| } |
| |
| @Override |
| public int hashCode() { |
| return ignoreSourceInComparisons ? id.hashCode() : Objects.hashCode(id, source); |
| } |
| |
| /** |
| * Returns a copy of the node with a new ID. |
| * |
| * @param id new ID of the node |
| * @return copy of the node with a new ID |
| */ |
| public abstract Node copy(NodeId id); |
| } |