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.file.consumer.adapters;
  
  import java.io.File;
  
  import org.apache.camel.component.file.consumer.DirectoryEntriesResumeAdapter;
  import org.apache.camel.component.file.consumer.FileResumeAdapter;
  import org.apache.camel.resume.cache.ResumeCache;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * An implementation of the {@link FileResumeAdapter} that can be used for resume operations for the file component.
   * This one can be used to manage the resume operations for files within a directory.
   */
  class DefaultDirectoryEntriesResumeAdapter extends AbstractFileResumeAdapter implements DirectoryEntriesResumeAdapter {
      private static final Logger LOG = LoggerFactory.getLogger(DefaultDirectoryEntriesResumeAdapter.class);
  
      protected boolean add(Object key, Object offset) {
          if (offset instanceof File fileBasedOffset) {
              FileSet fileSet = (FileSet) cache.computeIfAbsent((File) key, k -> new FileSet());
  
              fileSet.update(fileBasedOffset);
          } else {
              throw new UnsupportedOperationException("This adapter cannot be used for file offsets");
          }
  
          // For this one it's safe to always continue processing
          return true;
      }
  
      @Override
      public void resume() {
          // NO-OP
      }
  
      private boolean processed(ResumeCache<File> cache, File directory, File file) {
          LOG.trace("Checking if file {} from directory {} is cached", file, directory);
          FileSet cached = cache.get(directory, FileSet.class);
          if (cached == null) {
              LOG.trace("FileSet is not cached, therefore has not been processed yet");
              return false;
          }
  
          final boolean isCached = cached.contains(file);
          LOG.trace("FileSet is cached. Checking if it contains {}: {}", file, isCached);
  
          return isCached;
      }
  
      public boolean resume(File file) {
          return processed(cache, file.getParentFile(), file);
      }
  
      public void deserializeFileEntry(File keyObj, File valueObj) {
          LOG.trace("Deserializing file key {} with value {}", keyObj, valueObj);
          FileSet fileSet = (FileSet) cache.computeIfAbsent(keyObj, obj -> new FileSet());
  
          fileSet.update(valueObj);
      }
  }
  