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.component.wal;
  
  /**
   * This container represents a header of a transaction log file
   */
  public final class Header {
      public static final int FORMAT_NAME_SIZE = 8;
      public static final String FORMAT_NAME = "camel-wa";
      public static final int CURRENT_FILE_VERSION = 1;
      public static final Header WA_DEFAULT_V1;
      public static final int BYTES;
      private final String formatName;
      private final int fileVersion;
  
      static {
          WA_DEFAULT_V1 = new Header(FORMAT_NAME, CURRENT_FILE_VERSION);
  
          BYTES = FORMAT_NAME_SIZE + Integer.BYTES;
      }
  
      Header(final String formatName, int fileVersion) {
          if (formatName == null || formatName.isEmpty()) {
              throw new IllegalArgumentException("The format name is not valid: it's either empty or null");
          }
  
          if (formatName.length() > FORMAT_NAME_SIZE) {
              throw new IllegalArgumentException(
                      "The format name '" + formatName + "' is too short. Its length must be less than " + FORMAT_NAME_SIZE);
          }
  
          this.formatName = formatName;
          this.fileVersion = fileVersion;
      }
  
      public String getFormatName() {
          return formatName;
      }
  
      public int getFileVersion() {
          return fileVersion;
      }
  }
  