| /** |
| * 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.internal; |
| |
| /** |
| * Reference type. Used to specify what type of reference to keep to a |
| * referent. |
| * |
| * @see java.lang.ref.Reference |
| * @author crazybob@google.com (Bob Lee) |
| */ |
| public enum ReferenceType { |
| |
| /** |
| * Prevents referent from being reclaimed by the garbage collector. |
| */ |
| STRONG, |
| |
| /** |
| * Referent reclaimed in an LRU fashion when the VM runs low on memory and |
| * no strong references exist. |
| * |
| * @see java.lang.ref.SoftReference |
| */ |
| SOFT, |
| |
| /** |
| * Referent reclaimed when no strong or soft references exist. |
| * |
| * @see java.lang.ref.WeakReference |
| */ |
| WEAK, |
| |
| /** |
| * Similar to weak references except the garbage collector doesn't actually |
| * reclaim the referent. More flexible alternative to finalization. |
| * |
| * @see java.lang.ref.PhantomReference |
| */ |
| PHANTOM; |
| } |