| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.felix.ipojo.util; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| |
| /** |
| * Wraps the result of a method invocation |
| */ |
| public class InvocationResult<T> { |
| |
| private final Method method; |
| private final Object target; |
| private final T result; |
| private final Throwable error; |
| |
| public InvocationResult(Method method, Object target, T result, Throwable error) { |
| this.method = method; |
| this.target = target; |
| this.result = result; |
| this.error = error; |
| } |
| |
| public Method getMethod() { |
| return method; |
| } |
| |
| public Object getTarget() { |
| return target; |
| } |
| |
| public Throwable error() { |
| return error; |
| } |
| |
| public T get() { |
| return result; |
| } |
| |
| public T getOrElse(T def) { |
| if (error == null) { |
| return def; |
| } else { |
| return result; |
| } |
| } |
| |
| public static <T> InvocationResult<T> fromInvocation(Method method, Object target, Object[] args) { |
| try { |
| T result = (T) method.invoke(target, args); |
| return new InvocationResult<T>(method, target, result, null); |
| } catch (IllegalAccessException e) { |
| return new InvocationResult<T>(method, target, null, e); |
| } catch (InvocationTargetException e) { |
| return new InvocationResult<T>(method, target, null, e); |
| } |
| } |
| } |