content: /*
   * 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.camel.attachment;
  
  import org.apache.camel.CamelExchangeException;
  import org.apache.camel.Exchange;
  
  /**
   * An exception caused when a mandatory attachment is not available on a message {@link Exchange}
   *
   * @see org.apache.camel.support.ExchangeHelper#getMandatoryProperty(Exchange, String, Class)
   */
  public class NoSuchAttachmentException extends CamelExchangeException {
  
      private final String attachmentName;
      private final transient Class<?> type;
  
      public NoSuchAttachmentException(Exchange exchange, String attachmentName) {
          this(exchange, attachmentName, null);
      }
  
      public NoSuchAttachmentException(Exchange exchange, String attachmentName, Class<?> type) {
          super("No '" + attachmentName + "' attachment available" + (type != null ? " of type: " + type.getName() : "")
                + reason(exchange, attachmentName), exchange);
          this.attachmentName = attachmentName;
          this.type = type;
      }
  
      public String getAttachmentName() {
          return attachmentName;
      }
  
      public Class<?> getType() {
          return type;
      }
  
      protected static String reason(Exchange exchange, String propertyName) {
          Object value = exchange.getProperty(propertyName);
          return valueDescription(value);
      }
  
      static String valueDescription(Object value) {
          if (value == null) {
              return "";
          }
          return " but has type: " + value.getClass().getCanonicalName();
      }
  }
  