package org.csc.phynixx.loggersystem.logger.channellogger;
   
   /*
    * #%L
    * phynixx-common
    * %%
    * Copyright (C) 2014 csc
    * %%
    * Licensed 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.
   * #L%
   */
  
  
  import java.io.File;
  
  /**
   * traverses all logfile an notifies a given callback. This callback can collect any information.
   */
  class LogFileTraverser {
  
      public interface ICollectorCallback {
          void match(File file, LogFilenameMatcher.LogFilenameParts parts);
      }
  
      private LogFilenameMatcher logFileMatcher = null;
  
  
      LogFileTraverser(LogFilenameMatcher logFileMatcher, File startDirectory, ICollectorCallback cb) {
          super();
          this.logFileMatcher = logFileMatcher;
          if (startDirectory.exists() && startDirectory.isDirectory()) {
              this.iterateDirectory(startDirectory, cb);
          }
      }
  
  
      private void iterateDirectory(File startDirectory, ICollectorCallback cb) {
          File[] files = startDirectory.listFiles();
          if (files == null || files.length == 0) {
              return;
          }
          for (int i = 0; i < files.length; i++) {
              if (files[i].isDirectory()) {
                  iterateDirectory(files[i], cb);
              } else {
                  LogFilenameMatcher.LogFilenameParts parts =
                          this.logFileMatcher.matches(files[i].getName());
                  if (parts != null) {
                      cb.match(files[i], parts);
                  }
              }
          }
  
      }
  
  
  }