/*
    * Copyright 2008 the original author or authors.
    * 
    * 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 org.openehealth.ipf.commons.core.modules.api;
  
  import java.util.List;
  
  /**
   * @author Christian Ohr
   */
  @SuppressWarnings("serial")
  public class ValidationException extends RuntimeException {
  
      private Throwable[] causes;
  
      public ValidationException(Throwable cause) {
          super(cause);
          causes = new Throwable[] { cause };
      }
  
      public ValidationException(String message, Throwable cause) {
          super(message, cause);
          causes = new Throwable[] { cause };
      }
  
      public ValidationException(String message, Throwable... causes) {
          super(message, ((causes == null) || (causes.length == 0)) ? null : causes[0]);
          this.causes = causes;
      }
  
      public ValidationException(String message, List<? extends Throwable> causes) {
          this(message, causes.toArray(new Throwable[causes.size()]));
      }
  
      public ValidationException(String message) {
          super(message);
      }
  
      public ValidationException(Throwable... causes) {
          this(null, causes);
      }
  
      public ValidationException(List<? extends Throwable> causes) {
          this(null, causes);
      }
  
      public Throwable[] getCauses() {
          return causes;
      }
  
      @Override
      public String getMessage() {
          StringBuilder sb = new StringBuilder();
          
          String msg = super.getMessage();
          if(msg != null) {
              sb.append(msg).append('\n');
          }
  
          if(causes != null) {
              for(Throwable t : causes) {
                  if(t != null) {
                      msg = t.getMessage();
                      sb.append((msg == null) ? t.getClass().getName() : msg).append('\n');
                  }
              }
          }
  
          int len = sb.length(); 
          return (len == 0) ? getClass().getName() : sb.deleteCharAt(len - 1).toString();
      }
  
  }