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 /** Classification for what kind of binding this edge represents. */ 29 public enum Type { 30 /** Binding is to an instance or class of the binding's same type. */ 31 NORMAL, 32 /** Binding is to an instance or class that provides the binding's type. */ 33 PROVIDER, 34 /** Binding is to the interface for a constant of a different type. */ 35 CONVERTED_CONSTANT 36 } 37 38 private final Type type; 39 BindingEdge(NodeId fromId, NodeId toId, Type type)40 public BindingEdge(NodeId fromId, NodeId toId, Type type) { 41 super(fromId, toId); 42 this.type = type; 43 } 44 getType()45 public Type getType() { 46 return type; 47 } 48 49 @Override equals(Object obj)50 public boolean equals(Object obj) { 51 if (!(obj instanceof BindingEdge)) { 52 return false; 53 } 54 BindingEdge other = (BindingEdge) obj; 55 return super.equals(other) && Objects.equal(type, other.type); 56 } 57 58 @Override hashCode()59 public int hashCode() { 60 return 31 * super.hashCode() + Objects.hashCode(type); 61 } 62 63 @Override toString()64 public String toString() { 65 return "BindingEdge{fromId=" + getFromId() + " toId=" + getToId() + " type=" + type + "}"; 66 } 67 68 @Override copy(NodeId fromId, NodeId toId)69 public Edge copy(NodeId fromId, NodeId toId) { 70 return new BindingEdge(fromId, toId, type); 71 } 72 } 73