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 17package com.google.inject.internal; 18 19import static com.google.common.base.Preconditions.checkNotNull; 20 21import com.google.inject.Scope; 22import com.google.inject.spi.ScopeBinding; 23 24import java.lang.annotation.Annotation; 25 26/** 27 * Handles {@code Binder.bindScope} commands. 28 * 29 * @author crazybob@google.com (Bob Lee) 30 * @author jessewilson@google.com (Jesse Wilson) 31 */ 32final class ScopeBindingProcessor extends AbstractProcessor { 33 34 ScopeBindingProcessor(Errors errors) { 35 super(errors); 36 } 37 38 @Override public Boolean visit(ScopeBinding command) { 39 Scope scope = checkNotNull(command.getScope(), "scope"); 40 Class<? extends Annotation> annotationType = checkNotNull(command.getAnnotationType(), "annotation type"); 41 42 if (!Annotations.isScopeAnnotation(annotationType)) { 43 errors.missingScopeAnnotation(annotationType); 44 // Go ahead and bind anyway so we don't get collateral errors. 45 } 46 47 if (!Annotations.isRetainedAtRuntime(annotationType)) { 48 errors.missingRuntimeRetention(annotationType); 49 // Go ahead and bind anyway so we don't get collateral errors. 50 } 51 52 ScopeBinding existing = injector.state.getScopeBinding(annotationType); 53 if (existing != null) { 54 if (!scope.equals(existing.getScope())) { 55 errors.duplicateScopes(existing, annotationType, scope); 56 } 57 } else { 58 injector.state.putScopeBinding(annotationType, command); 59 } 60 61 return true; 62 } 63}