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      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 import com.google.inject.spi.InjectionPoint;
     21 
     22 /**
     23  * Edge from a class or {@link InjectionPoint} to the interface node that will satisfy the
     24  * dependency.
     25  *
     26  * @author phopkins (at) gmail.com (Pete Hopkins)
     27  * @since 4.0 (since 2.0 as an interface)
     28  */
     29 public class DependencyEdge extends Edge {
     30   /**
     31    * Injection point to which this dependency belongs, or null if the dependency isn't attached to a
     32    * particular injection point.
     33    */
     34   private final InjectionPoint injectionPoint;
     35 
     36   public DependencyEdge(NodeId fromId, NodeId toId, InjectionPoint injectionPoint) {
     37     super(fromId, toId);
     38     this.injectionPoint = injectionPoint;
     39   }
     40 
     41   public InjectionPoint getInjectionPoint() {
     42     return injectionPoint;
     43   }
     44 
     45   @Override
     46   public boolean equals(Object obj) {
     47     if (!(obj instanceof DependencyEdge)) {
     48       return false;
     49     }
     50     DependencyEdge other = (DependencyEdge) obj;
     51     return super.equals(other) && Objects.equal(injectionPoint, other.injectionPoint);
     52   }
     53 
     54   @Override
     55   public int hashCode() {
     56     return 31 * super.hashCode() + Objects.hashCode(injectionPoint);
     57   }
     58 
     59   @Override
     60   public String toString() {
     61     return "DependencyEdge{fromId="
     62         + getFromId()
     63         + " toId="
     64         + getToId()
     65         + " injectionPoint="
     66         + injectionPoint
     67         + "}";
     68   }
     69 
     70   @Override
     71   public Edge copy(NodeId fromId, NodeId toId) {
     72     return new DependencyEdge(fromId, toId, injectionPoint);
     73   }
     74 }
     75