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.spark.network;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.nio.ByteBuffer;
  
  import com.google.common.base.Preconditions;
  import io.netty.buffer.Unpooled;
  
  import org.apache.spark.network.buffer.ManagedBuffer;
  import org.apache.spark.network.buffer.NettyManagedBuffer;
  
  /**
   * A ManagedBuffer implementation that contains 0, 1, 2, 3, ..., (len-1).
   *
   * Used for testing.
   */
  public class TestManagedBuffer extends ManagedBuffer {
  
    private final int len;
    private NettyManagedBuffer underlying;
  
    public TestManagedBuffer(int len) {
      Preconditions.checkArgument(len <= Byte.MAX_VALUE);
      this.len = len;
      byte[] byteArray = new byte[len];
      for (int i = 0; i < len; i ++) {
        byteArray[i] = (byte) i;
      }
      this.underlying = new NettyManagedBuffer(Unpooled.wrappedBuffer(byteArray));
    }
  
  
    @Override
    public long size() {
      return underlying.size();
    }
  
    @Override
    public ByteBuffer nioByteBuffer() throws IOException {
      return underlying.nioByteBuffer();
    }
  
    @Override
    public InputStream createInputStream() throws IOException {
      return underlying.createInputStream();
    }
  
    @Override
    public ManagedBuffer retain() {
      underlying.retain();
      return this;
    }
  
    @Override
    public ManagedBuffer release() {
      underlying.release();
      return this;
    }
  
    @Override
    public Object convertToNetty() throws IOException {
      return underlying.convertToNetty();
    }
  
    @Override
    public int hashCode() {
      return underlying.hashCode();
    }
  
    @Override
    public boolean equals(Object other) {
      if (other instanceof ManagedBuffer) {
        try {
          ByteBuffer nioBuf = ((ManagedBuffer) other).nioByteBuffer();
          if (nioBuf.remaining() != len) {
            return false;
          } else {
            for (int i = 0; i < len; i ++) {
              if (nioBuf.get() != i) {
                return false;
              }
            }
            return true;
          }
        } catch (IOException e) {
          throw new RuntimeException(e);
        }
      }
      return false;
    }
  }
  