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   *  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
   *
   *    https://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
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  package org.apache.cayenne.validation;
  
  /**
   * Represents a generic validation failure that contains
   * failed object and a message describing the failure.
   * 
   * @since 1.1
   */
  public class SimpleValidationFailure implements ValidationFailure {
      protected Object source;
      protected Object error;
  
      public SimpleValidationFailure(Object source, Object error) {
          this.source = source;
          this.error = error;
      }
  
      /**
       * Returns the error converted to String.
       */
      public String getDescription() {
          return String.valueOf(error);
      }
  
      /**
       * Returns object that failed the validation.
       */
      public Object getSource() {
          return source;
      }
  
      public Object getError() {
          return error;
      }
  
      /**
       * Returns a String representation of the failure.
       */
      @Override
      public String toString() {
          StringBuilder buffer = new StringBuilder();
  
          buffer.append("Validation failure for ");
          Object source = getSource();
  
          if (source == null) {
              buffer.append("[General]");
          }
          else {
              String sourceLabel = (source instanceof String) ? source.toString() : source
                      .getClass()
                      .getName();
              buffer.append(sourceLabel);
          }
          buffer.append(": ");
          buffer.append(getDescription());
          return buffer.toString();
      }
  }
  