| /** |
| * Copyright (C) 2008 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.google.inject; |
| |
| import com.google.inject.InjectorImpl.MethodInvoker; |
| import com.google.inject.internal.BytecodeGen; |
| import com.google.inject.internal.BytecodeGen.Visibility; |
| import com.google.inject.internal.Errors; |
| import com.google.inject.internal.ErrorsException; |
| import com.google.inject.internal.InternalContext; |
| import com.google.inject.spi.InjectionPoint; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| |
| /** |
| * Invokes an injectable method. |
| */ |
| class SingleMethodInjector implements SingleMemberInjector { |
| final MethodInvoker methodInvoker; |
| final SingleParameterInjector<?>[] parameterInjectors; |
| final InjectionPoint injectionPoint; |
| |
| public SingleMethodInjector(InjectorImpl injector, InjectionPoint injectionPoint, Errors errors) |
| throws ErrorsException { |
| this.injectionPoint = injectionPoint; |
| final Method method = (Method) injectionPoint.getMember(); |
| methodInvoker = createMethodInvoker(method); |
| parameterInjectors = injector.getParametersInjectors(injectionPoint.getDependencies(), errors); |
| } |
| |
| private MethodInvoker createMethodInvoker(final Method method) { |
| |
| // We can't use FastMethod if the method is private. |
| int modifiers = method.getModifiers(); |
| if (!Modifier.isPrivate(modifiers) && !Modifier.isProtected(modifiers)) { |
| /*if[AOP]*/ |
| final net.sf.cglib.reflect.FastMethod fastMethod |
| = BytecodeGen.newFastClass(method.getDeclaringClass(), Visibility.forMember(method)) |
| .getMethod(method); |
| |
| return new MethodInvoker() { |
| public Object invoke(Object target, Object... parameters) |
| throws IllegalAccessException, InvocationTargetException { |
| return fastMethod.invoke(target, parameters); |
| } |
| }; |
| /*end[AOP]*/ |
| } |
| |
| if (!Modifier.isPublic(modifiers)) { |
| method.setAccessible(true); |
| } |
| |
| return new MethodInvoker() { |
| public Object invoke(Object target, Object... parameters) |
| throws IllegalAccessException, InvocationTargetException { |
| return method.invoke(target, parameters); |
| } |
| }; |
| } |
| |
| public InjectionPoint getInjectionPoint() { |
| return injectionPoint; |
| } |
| |
| public void inject(Errors errors, InternalContext context, Object o) { |
| Object[] parameters; |
| try { |
| parameters = SingleParameterInjector.getAll(errors, context, parameterInjectors); |
| } catch (ErrorsException e) { |
| errors.merge(e.getErrors()); |
| return; |
| } |
| |
| try { |
| methodInvoker.invoke(o, parameters); |
| } catch (IllegalAccessException e) { |
| throw new AssertionError(e); // a security manager is blocking us, we're hosed |
| } catch (InvocationTargetException userException) { |
| Throwable cause = userException.getCause() != null |
| ? userException.getCause() |
| : userException; |
| errors.withSource(injectionPoint).errorInjectingMethod(cause); |
| } |
| } |
| } |