1 /** 2 * Copyright (C) 2007 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.throwingproviders; 18 19 import static java.lang.annotation.RetentionPolicy.RUNTIME; 20 21 import com.google.inject.Key; 22 import com.google.inject.Provider; 23 import com.google.inject.Scope; 24 import com.google.inject.ScopeAnnotation; 25 26 import java.lang.annotation.Retention; 27 import java.util.HashMap; 28 import java.util.Map; 29 30 /** 31 * A simple scope that can be explicitly reset. 32 * 33 * @author jmourits (at) google.com (Jerome Mourits) 34 */ 35 class TestScope implements Scope { 36 37 @Retention(RUNTIME) @ScopeAnnotation 38 public @interface Scoped { } 39 40 private Map<Key, Object> inScopeObjectsMap = new HashMap<Key, Object>(); 41 42 public <T> Provider<T> scope( 43 final Key<T> key, final Provider<T> provider) { 44 return new Provider<T>() { 45 @SuppressWarnings({"unchecked"}) 46 public T get() { 47 T t = (T) inScopeObjectsMap.get(key); 48 if (t == null) { 49 t = provider.get(); 50 inScopeObjectsMap.put(key, t); 51 } 52 return t; 53 } 54 }; 55 } 56 57 public void beginNewScope() { 58 inScopeObjectsMap = new HashMap<Key, Object>(); 59 } 60 } 61
