| /** |
| * Copyright (C) 2006 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; |
| |
| /** |
| * Dependency mapping key. Uniquely identified by the required type and name. |
| * |
| * @author crazybob@google.com (Bob Lee) |
| */ |
| class Key<T> { |
| |
| final Class<T> type; |
| final String name; |
| final int hashCode; |
| |
| private Key(Class<T> type, String name) { |
| if (type == null) { |
| throw new NullPointerException("Type is null."); |
| } |
| if (name == null) { |
| throw new NullPointerException("Name is null."); |
| } |
| |
| this.type = type; |
| this.name = name; |
| |
| hashCode = type.hashCode() * 31 + name.hashCode(); |
| } |
| |
| Class<T> getType() { |
| return type; |
| } |
| |
| String getName() { |
| return name; |
| } |
| |
| public int hashCode() { |
| return hashCode; |
| } |
| |
| public boolean equals(Object o) { |
| if (!(o instanceof Key)) { |
| return false; |
| } |
| if (o == this) { |
| return true; |
| } |
| Key other = (Key) o; |
| return name.equals(other.name) && type.equals(other.type); |
| } |
| |
| public String toString() { |
| return "[type=" + type.getName() + ", name='" + name + "']"; |
| } |
| |
| static <T> Key<T> newInstance(Class<T> type, String name) { |
| return new Key<T>(type, name); |
| } |
| } |