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.beam.sdk.util;
  
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  import org.apache.beam.sdk.annotations.Internal;
  
  /**
   * {@link ByteArrayInputStream} that allows accessing the entire internal buffer without copying.
   */
  @Internal
  public class ExposedByteArrayInputStream extends ByteArrayInputStream {
  
    public ExposedByteArrayInputStream(byte[] buf) {
      super(buf);
    }
  
    /** Read all remaining bytes. */
    public byte[] readAll() throws IOException {
      if (pos == 0 && count == buf.length) {
        pos = count;
        return buf;
      }
      byte[] ret = new byte[count - pos];
      super.read(ret);
      return ret;
    }
  
    @Override
    public void close() {
      try {
        super.close();
      } catch (IOException exn) {
        throw new RuntimeException("Unexpected IOException closing ByteArrayInputStream", exn);
      }
    }
  }
  