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.ConfigurationException; 23 24 import java.util.Set; 25 26 /** 27 * A request to inject the static fields and methods of a type. Requests are created 28 * explicitly in a module using {@link com.google.inject.Binder#requestStaticInjection(Class[]) 29 * requestStaticInjection()} statements: 30 * <pre> 31 * requestStaticInjection(MyLegacyService.class);</pre> 32 * 33 * @author jessewilson@google.com (Jesse Wilson) 34 * @since 2.0 35 */ 36 public final class StaticInjectionRequest implements Element { 37 private final Object source; 38 private final Class<?> type; 39 StaticInjectionRequest(Object source, Class<?> type)40 StaticInjectionRequest(Object source, Class<?> type) { 41 this.source = checkNotNull(source, "source"); 42 this.type = checkNotNull(type, "type"); 43 } 44 getSource()45 public Object getSource() { 46 return source; 47 } 48 getType()49 public Class<?> getType() { 50 return type; 51 } 52 53 /** 54 * Returns the static methods and fields of {@code type} that will be injected to fulfill this 55 * request. 56 * 57 * @return a possibly empty set of injection points. The set has a specified iteration order. All 58 * fields are returned and then all methods. Within the fields, supertype fields are returned 59 * before subtype fields. Similarly, supertype methods are returned before subtype methods. 60 * @throws ConfigurationException if there is a malformed injection point on {@code type}, such as 61 * a field with multiple binding annotations. The exception's {@link 62 * ConfigurationException#getPartialValue() partial value} is a {@code Set<InjectionPoint>} 63 * of the valid injection points. 64 */ getInjectionPoints()65 public Set<InjectionPoint> getInjectionPoints() throws ConfigurationException { 66 return InjectionPoint.forStaticMethodsAndFields(type); 67 } 68 applyTo(Binder binder)69 public void applyTo(Binder binder) { 70 binder.withSource(getSource()).requestStaticInjection(type); 71 } 72 acceptVisitor(ElementVisitor<T> visitor)73 public <T> T acceptVisitor(ElementVisitor<T> visitor) { 74 return visitor.visit(this); 75 } 76 } 77