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.bookkeeper.util;
  
  import org.apache.bookkeeper.common.util.ReflectionUtils;
  import org.apache.bookkeeper.conf.AbstractConfiguration;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Formatter to format an entry.
   */
  public abstract class EntryFormatter {
  
      private static final Logger LOG = LoggerFactory.getLogger(EntryFormatter.class);
  
      /**
       * Format an entry into a readable format.
       *
       * @param data
       *          Data Payload
       */
      public abstract void formatEntry(byte[] data);
  
      /**
       * Format an entry from a string into a readable format.
       *
       * @param input
       *          Input Stream
       */
      public abstract void formatEntry(java.io.InputStream input);
      public static final EntryFormatter STRING_FORMATTER = new StringEntryFormatter();
  
      public static EntryFormatter newEntryFormatter(AbstractConfiguration<?> conf) {
          EntryFormatter formatter;
          try {
              Class<? extends EntryFormatter> entryFormatterClass = conf.getEntryFormatterClass();
              formatter = ReflectionUtils.newInstance(entryFormatterClass);
          } catch (Exception e) {
              LOG.warn("No formatter class found", e);
              LOG.warn("Using Default String Formatter.");
              formatter = new StringEntryFormatter();
          }
          return formatter;
      }
  
      public static EntryFormatter newEntryFormatter(String opt, AbstractConfiguration conf) {
          EntryFormatter formatter;
          if ("hex".equals(opt)) {
              formatter = new HexDumpEntryFormatter();
          } else if ("string".equals(opt)) {
              formatter = new StringEntryFormatter();
          } else {
              LOG.warn("specified unexpected entryformat {}, so default EntryFormatter is used", opt);
              formatter = newEntryFormatter(conf);
          }
          return formatter;
      }
  }
  