SizeAwareFileBasedHelperDecorator.java

/*
 * 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 gobblin.source.extractor.filebased;

import gobblin.util.Decorator;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;


/**
 * A decorator that delegates to inner {@link FileBasedHelper}.
 * {@link #getFileSize(String)} is not implemented by this class.
 */
public class SizeAwareFileBasedHelperDecorator implements SizeAwareFileBasedHelper, Decorator {

  private final FileBasedHelper fileBasedHelper;

  public SizeAwareFileBasedHelperDecorator(FileBasedHelper fileBasedHelper) {
    this.fileBasedHelper = fileBasedHelper;
  }

  @Override
  public void connect() throws FileBasedHelperException {
    this.fileBasedHelper.connect();
  }

  @Override
  public void close() throws IOException {
    this.fileBasedHelper.close();
  }

  @Override
  public List<String> ls(String path) throws FileBasedHelperException {
    return this.fileBasedHelper.ls(path);
  }

  @Override
  public InputStream getFileStream(String path) throws FileBasedHelperException {
    return this.fileBasedHelper.getFileStream(path);
  }

  @Override
  public long getFileSize(String path) throws FileBasedHelperException {
    throw new UnsupportedOperationException("Method not implemented");
  }

  @Override
  public Object getDecoratedObject() {
    return this.fileBasedHelper;
  }
}