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;
  
  /**
   * Contains information about a log entry
   */
  public class EntryInfo {
      private final long position;
  
      private EntryInfo(long position) {
          this.position = position;
      }
  
      public long getPosition() {
          return position;
      }
  
      /**
       * Contains information about a log entry that is hot on the cache
       */
      public static class CachedEntryInfo extends EntryInfo {
          private final TransactionLog.LayerInfo layerInfo;
  
          CachedEntryInfo(long position, TransactionLog.LayerInfo layerInfo) {
              super(position);
              this.layerInfo = layerInfo;
          }
  
          public TransactionLog.LayerInfo getLayerInfo() {
              return layerInfo;
          }
  
      }
  
      /**
       * Creates a new entry info instance for entries persisted at the given position
       *
       * @param  position the position of the entry
       * @return          a new entry info
       */
      public static EntryInfo createForPersisted(long position) {
          return new EntryInfo(position);
      }
  
      /**
       * Creates a new entry info instance for entries cached at the given position and layer
       *
       * @param  position  the position of the entry
       * @param  layerInfo the layer on the transaction cache
       * @return           a new entry info
       */
      public static CachedEntryInfo createForCached(long position, TransactionLog.LayerInfo layerInfo) {
          return new CachedEntryInfo(position, layerInfo);
      }
  }
  