hadoop-tools/hadoop-ozone/src/main/java/org/apache/hadoop/fs/ozone/OzoneFSInputStream.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 org.apache.hadoop.fs.ozone;

import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.fs.FSInputStream;
import org.apache.hadoop.ozone.client.io.ChunkGroupInputStream;

import java.io.IOException;
import java.io.InputStream;

/**
 * The input stream for Ozone file system.
 *
 * TODO: Make inputStream generic for both rest and rpc clients
 * This class is not thread safe.
 */
@InterfaceAudience.Private
@InterfaceStability.Evolving
public final class OzoneFSInputStream extends FSInputStream {

  private final ChunkGroupInputStream inputStream;

  public OzoneFSInputStream(InputStream inputStream) {
    this.inputStream = (ChunkGroupInputStream)inputStream;
  }

  @Override
  public int read() throws IOException {
    return inputStream.read();
  }

  @Override
  public int read(byte[] b, int off, int len) throws IOException {
    return inputStream.read(b, off, len);
  }

  @Override
  public synchronized void close() throws IOException {
    inputStream.close();
  }

  @Override
  public void seek(long pos) throws IOException {
    inputStream.seek(pos);
  }

  @Override
  public long getPos() throws IOException {
    return inputStream.getPos();
  }

  @Override
  public boolean seekToNewSource(long targetPos) throws IOException {
    return false;
  }

  @Override
  public int available() throws IOException {
    return inputStream.available();
  }
}