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.internal; 18 19 import static com.google.common.base.Preconditions.checkNotNull; 20 21 import com.google.inject.Scope; 22 import com.google.inject.spi.ScopeBinding; 23 import java.lang.annotation.Annotation; 24 25 /** 26 * Handles {@code Binder.bindScope} commands. 27 * 28 * @author crazybob (at) google.com (Bob Lee) 29 * @author jessewilson (at) google.com (Jesse Wilson) 30 */ 31 final class ScopeBindingProcessor extends AbstractProcessor { 32 33 ScopeBindingProcessor(Errors errors) { 34 super(errors); 35 } 36 37 @Override 38 public Boolean visit(ScopeBinding command) { 39 Scope scope = checkNotNull(command.getScope(), "scope"); 40 Class<? extends Annotation> annotationType = 41 checkNotNull(command.getAnnotationType(), "annotation type"); 42 43 if (!Annotations.isScopeAnnotation(annotationType)) { 44 errors.missingScopeAnnotation(annotationType); 45 // Go ahead and bind anyway so we don't get collateral errors. 46 } 47 48 if (!Annotations.isRetainedAtRuntime(annotationType)) { 49 errors.missingRuntimeRetention(annotationType); 50 // Go ahead and bind anyway so we don't get collateral errors. 51 } 52 53 ScopeBinding existing = injector.state.getScopeBinding(annotationType); 54 if (existing != null) { 55 if (!scope.equals(existing.getScope())) { 56 errors.duplicateScopes(existing, annotationType, scope); 57 } 58 } else { 59 injector.state.putScopeBinding(annotationType, command); 60 } 61 62 return true; 63 } 64 } 65
