001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.juneau.commons.reflect;
018
019import static org.apache.juneau.commons.utils.Utils.*;
020
021import java.lang.reflect.*;
022import java.text.*;
023
024/**
025 * General exception that occurs when trying to execute a constructor, method, or field using reflection.
026 *
027 *
028 * @serial exclude
029 */
030public class ExecutableException extends RuntimeException {
031
032   private static final long serialVersionUID = 1L;
033
034   /**
035    * Constructor.
036    *
037    * @param message The {@link MessageFormat}-style message.
038    * @param args Optional {@link MessageFormat}-style arguments.
039    */
040   public ExecutableException(String message, Object...args) {
041      super(f(message, args));
042   }
043
044   /**
045    * Constructor.
046    *
047    * @param causedBy The cause of this exception.
048    */
049   public ExecutableException(Throwable causedBy) {
050      super(causedBy);
051   }
052
053   /**
054    * Constructor.
055    *
056    * @param causedBy The cause of this exception.
057    * @param message The {@link MessageFormat}-style message.
058    * @param args Optional {@link MessageFormat}-style arguments.
059    */
060   public ExecutableException(Throwable causedBy, String message, Object...args) {
061      super(f(message, args), causedBy);
062   }
063
064   /**
065    * If the thrown exception was an {@link InvocationTargetException} returns the target exception.
066    * Otherwise returns the inner exception which is typically {@link IllegalArgumentException} or {@link IllegalAccessException}.
067    *
068    * @return The inner throwable.
069    */
070   public Throwable getTargetException() {
071      Throwable c = this.getCause();
072      return c instanceof InvocationTargetException c2 ? c2.getTargetException() : c;
073   }
074
075   /**
076    * Returns the caused-by exception if there is one.
077    *
078    * @return The caused-by exception if there is one, or this exception if there isn't.
079    */
080   public Throwable unwrap() {
081      Throwable t = getCause();
082      return t == null ? this : t;
083   }
084}