1 /** 2 * Copyright (C) 2008 Google Inc. 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.inject.grapher; 18 19 import com.google.common.base.Objects; 20 21 /** 22 * Edge that connects an interface to the type or instance that is bound to implement it. 23 * 24 * @author phopkins@gmail.com (Pete Hopkins) 25 * @since 4.0 (since 2.0 as an interface) 26 */ 27 public class BindingEdge extends Edge { 28 /** 29 * Classification for what kind of binding this edge represents. 30 */ 31 public enum Type { 32 /** Binding is to an instance or class of the binding's same type. */ 33 NORMAL, 34 /** Binding is to an instance or class that provides the binding's type. */ 35 PROVIDER, 36 /** Binding is to the interface for a constant of a different type. */ 37 CONVERTED_CONSTANT 38 } 39 40 private final Type type; 41 BindingEdge(NodeId fromId, NodeId toId, Type type)42 public BindingEdge(NodeId fromId, NodeId toId, Type type) { 43 super(fromId, toId); 44 this.type = type; 45 } 46 getType()47 public Type getType() { 48 return type; 49 } 50 equals(Object obj)51 @Override public boolean equals(Object obj) { 52 if (!(obj instanceof BindingEdge)) { 53 return false; 54 } 55 BindingEdge other = (BindingEdge) obj; 56 return super.equals(other) && Objects.equal(type, other.type); 57 } 58 hashCode()59 @Override public int hashCode() { 60 return 31 * super.hashCode() + Objects.hashCode(type); 61 } 62 toString()63 @Override public String toString() { 64 return "BindingEdge{fromId=" + getFromId() + " toId=" + getToId() + " type=" + type + "}"; 65 } 66 copy(NodeId fromId, NodeId toId)67 @Override public Edge copy(NodeId fromId, NodeId toId) { 68 return new BindingEdge(fromId, toId, type); 69 } 70 } 71