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.column.bytes.stream.in;
  
  import java.io.EOFException;
  import java.io.IOException;
  import java.io.InputStream;
  import java.nio.ByteBuffer;
  
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  import org.apache.hyracks.data.std.api.IPointable;
  import org.apache.hyracks.storage.am.lsm.btree.column.api.IColumnBufferProvider;
  
  public abstract class AbstractBytesInputStream extends InputStream {
  
      public abstract void resetAt(int bytesToSkip, AbstractBytesInputStream stream) throws IOException;
  
      protected abstract void addBuffer(ByteBuffer buffer);
  
      public abstract void read(IPointable pointable, int length) throws EOFException;
  
      @Override
      public abstract int read() throws IOException;
  
      @Override
      public abstract int read(byte[] bytes, int offset, int length) throws IOException;
  
      @Override
      public abstract long skip(long n);
  
      public abstract int read(ByteBuffer out);
  
      public abstract AbstractBytesInputStream remainingStream() throws EOFException;
  
      public abstract AbstractBytesInputStream sliceStream(int length) throws EOFException;
  
      @Override
      public abstract void mark(int readLimit);
  
      @Override
      public abstract void reset() throws IOException;
  
      public abstract void reset(IColumnBufferProvider bufferProvider) throws HyracksDataException;
  
      @Override
      public abstract int available();
  
      public ByteBuffer getBuffer() {
          throw new UnsupportedOperationException("Getting buffer is not supported");
      }
  
      public final void skipFully(long n) throws IOException {
          long skipped = skip(n);
          if (skipped < n) {
              throw new EOFException("Not enough bytes to skip: " + skipped + " < " + n);
          }
      }
  
      @Override
      public final boolean markSupported() {
          return true;
      }
  }
  