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 com.google.inject.internal.InjectorImpl.JitLimitation; 20 import com.google.inject.spi.Dependency; 21 import com.google.inject.spi.InjectionPoint; 22 23 import java.lang.reflect.Field; 24 25 /** 26 * Sets an injectable field. 27 */ 28 final class SingleFieldInjector implements SingleMemberInjector { 29 final Field field; 30 final InjectionPoint injectionPoint; 31 final Dependency<?> dependency; 32 final BindingImpl<?> binding; 33 34 public SingleFieldInjector(InjectorImpl injector, InjectionPoint injectionPoint, Errors errors) 35 throws ErrorsException { 36 this.injectionPoint = injectionPoint; 37 this.field = (Field) injectionPoint.getMember(); 38 this.dependency = injectionPoint.getDependencies().get(0); 39 40 // Ewwwww... 41 field.setAccessible(true); 42 binding = injector.getBindingOrThrow(dependency.getKey(), errors, JitLimitation.NO_JIT); 43 } 44 45 public InjectionPoint getInjectionPoint() { 46 return injectionPoint; 47 } 48 49 public void inject(Errors errors, InternalContext context, Object o) { 50 errors = errors.withSource(dependency); 51 52 Dependency previous = context.pushDependency(dependency, binding.getSource()); 53 try { 54 Object value = binding.getInternalFactory().get(errors, context, dependency, false); 55 field.set(o, value); 56 } catch (ErrorsException e) { 57 errors.withSource(injectionPoint).merge(e.getErrors()); 58 } catch (IllegalAccessException e) { 59 throw new AssertionError(e); // a security manager is blocking us, we're hosed 60 } finally { 61 context.popStateAndSetDependency(previous); 62 } 63 } 64 } 65
