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.asterix.cloud.lazy;
  
  import java.io.FilenameFilter;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.Set;
  
  import org.apache.asterix.cloud.UncachedFileReference;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  import org.apache.hyracks.api.io.FileReference;
  
  public class NoOpParallelCacher implements IParallelCacher {
      public static final IParallelCacher INSTANCE = new NoOpParallelCacher();
  
      @Override
      public boolean isCacheable(FileReference fileReference) {
          return false;
      }
  
      @Override
      public Set<UncachedFileReference> getUncachedFiles() {
          return Collections.emptySet();
      }
  
      @Override
      public Set<FileReference> getUncachedFiles(FileReference dir, FilenameFilter filter) {
          return Collections.emptySet();
      }
  
      @Override
      public long getSize(FileReference fileReference) {
          return 0L;
      }
  
      @Override
      public long getUncachedTotalSize() {
          return 0L;
      }
  
      @Override
      public boolean createEmptyDataFiles(FileReference indexFile) throws HyracksDataException {
          return false;
      }
  
      @Override
      public boolean downloadDataFiles(FileReference indexFile) {
          return false;
      }
  
      @Override
      public boolean downloadMetadataFiles(FileReference indexFile) {
          return false;
      }
  
      @Override
      public boolean remove(Collection<FileReference> deletedFiles) {
          return false;
      }
  
      @Override
      public boolean remove(FileReference fileReference) {
          return false;
      }
  
      @Override
      public void add(Collection<FileReference> files) {
          // NoOp
      }
  
      @Override
      public void close() {
          // NoOp
      }
  }
  