| /* |
| * 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.internal; |
| |
| import com.google.inject.internal.InjectorImpl.MethodInvoker; |
| 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. */ |
| final class SingleMethodInjector implements SingleMemberInjector { |
| private final MethodInvoker methodInvoker; |
| private final SingleParameterInjector<?>[] parameterInjectors; |
| private final InjectionPoint injectionPoint; |
| |
| 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) { |
| |
| /*if[AOP]*/ |
| try { |
| final net.sf.cglib.reflect.FastClass fastClass = BytecodeGen.newFastClassForMember(method); |
| if (fastClass != null) { |
| final int index = fastClass.getMethod(method).getIndex(); |
| |
| return new MethodInvoker() { |
| @Override |
| public Object invoke(Object target, Object... parameters) |
| throws IllegalAccessException, InvocationTargetException { |
| return fastClass.invoke(index, target, parameters); |
| } |
| }; |
| } |
| } catch (net.sf.cglib.core.CodeGenerationException e) { |
| /* fall-through */ |
| } |
| /*end[AOP]*/ |
| |
| int modifiers = method.getModifiers(); |
| if (!Modifier.isPublic(modifiers) |
| || !Modifier.isPublic(method.getDeclaringClass().getModifiers())) { |
| method.setAccessible(true); |
| } |
| |
| return new MethodInvoker() { |
| @Override |
| public Object invoke(Object target, Object... parameters) |
| throws IllegalAccessException, InvocationTargetException { |
| return method.invoke(target, parameters); |
| } |
| }; |
| } |
| |
| @Override |
| public InjectionPoint getInjectionPoint() { |
| return injectionPoint; |
| } |
| |
| @Override |
| public void inject(InternalContext context, Object o) throws InternalProvisionException { |
| Object[] parameters = SingleParameterInjector.getAll(context, parameterInjectors); |
| |
| 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; |
| throw InternalProvisionException.errorInjectingMethod(cause).addSource(injectionPoint); |
| } |
| } |
| } |