/*
    * 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.log4j.spi;
  
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Method;
  import java.util.List;
  
  import org.apache.logging.log4j.util.Strings;
  
  /**
   * Class Description goes here.
   */
  public class ThrowableInformation implements java.io.Serializable {
  
      static final long serialVersionUID = -4748765566864322735L;
  
      private transient Throwable throwable;
      private Method toStringList;
  
      public ThrowableInformation(Throwable throwable) {
          this.throwable = throwable;
          Method method = null;
          try {
              Class<?> throwables = Class.forName("org.apache.logging.log4j.core.util.Throwables");
              method = throwables.getMethod("toStringList", Throwable.class);
          } catch (ClassNotFoundException | NoSuchMethodException ex) {
              // Ignore the exception if Log4j-core is not present.
          }
          this.toStringList = method;
      }
  
      public Throwable getThrowable() {
          return throwable;
      }
  
      public synchronized String[] getThrowableStrRep() {
          if (toStringList != null && throwable != null) {
              try {
                  @SuppressWarnings("unchecked")
                  List<String> elements = (List<String>) toStringList.invoke(null, throwable);
                  if (elements != null) {
                      return elements.toArray(Strings.EMPTY_ARRAY);
                  }
              } catch (IllegalAccessException | InvocationTargetException ex) {
                  // Ignore the exception.
              }
          }
          return null;
      }
  }