| /** |
| * 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; |
| |
| /** |
| * Edge in a guice dependency graph. |
| * |
| * @author bojand@google.com (Bojan Djordjevic) |
| */ |
| public abstract class Edge { |
| private final NodeId fromId; |
| private final NodeId toId; |
| |
| protected Edge(NodeId fromId, NodeId toId) { |
| this.fromId = fromId; |
| this.toId = toId; |
| } |
| |
| public NodeId getFromId() { |
| return fromId; |
| } |
| |
| public NodeId getToId() { |
| return toId; |
| } |
| |
| @Override public boolean equals(Object obj) { |
| if (!(obj instanceof Edge)) { |
| return false; |
| } |
| Edge other = (Edge) obj; |
| return Objects.equal(fromId, other.fromId) && Objects.equal(toId, other.toId); |
| } |
| |
| @Override public int hashCode() { |
| return Objects.hashCode(fromId, toId); |
| } |
| |
| /** |
| * Returns a copy of the edge with new node IDs. |
| * |
| * @param fromId new ID of the 'from' node |
| * @param toId new ID of the 'to' node |
| * @return copy of the edge with the new node IDs |
| */ |
| public abstract Edge copy(NodeId fromId, NodeId toId); |
| } |