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.spi; 18 19 import static com.google.common.base.Preconditions.checkNotNull; 20 21 import com.google.inject.Binder; 22 import com.google.inject.Scope; 23 24 import java.lang.annotation.Annotation; 25 26 /** 27 * Registration of a scope annotation with the scope that implements it. Instances are created 28 * explicitly in a module using {@link com.google.inject.Binder#bindScope(Class, Scope) bindScope()} 29 * statements: 30 * <pre> 31 * Scope recordScope = new RecordScope(); 32 * bindScope(RecordScoped.class, new RecordScope());</pre> 33 * 34 * @author jessewilson@google.com (Jesse Wilson) 35 * @since 2.0 36 */ 37 public final class ScopeBinding implements Element { 38 private final Object source; 39 private final Class<? extends Annotation> annotationType; 40 private final Scope scope; 41 ScopeBinding(Object source, Class<? extends Annotation> annotationType, Scope scope)42 ScopeBinding(Object source, Class<? extends Annotation> annotationType, Scope scope) { 43 this.source = checkNotNull(source, "source"); 44 this.annotationType = checkNotNull(annotationType, "annotationType"); 45 this.scope = checkNotNull(scope, "scope"); 46 } 47 getSource()48 public Object getSource() { 49 return source; 50 } 51 getAnnotationType()52 public Class<? extends Annotation> getAnnotationType() { 53 return annotationType; 54 } 55 getScope()56 public Scope getScope() { 57 return scope; 58 } 59 acceptVisitor(ElementVisitor<T> visitor)60 public <T> T acceptVisitor(ElementVisitor<T> visitor) { 61 return visitor.visit(this); 62 } 63 applyTo(Binder binder)64 public void applyTo(Binder binder) { 65 binder.withSource(getSource()).bindScope(annotationType, scope); 66 } 67 } 68