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 com.clearspring.analytics.stream.membership;
  
  import java.io.ByteArrayInputStream;
  import java.io.DataInputStream;
  
  
  /**
   * An implementation of the DataInputStream interface. This instance is completely thread
   * unsafe.
   */
  
  public final class DataInputBuffer extends DataInputStream {
  
      private static class Buffer extends ByteArrayInputStream {
  
          public Buffer() {
              super(new byte[]{});
          }
  
          public void reset(byte[] input, int start, int length) {
              this.buf = input;
              this.count = start + length;
              this.mark = start;
              this.pos = start;
          }
  
          public int getPosition() {
              return pos;
          }
  
          public void setPosition(int position) {
              pos = position;
          }
  
          public int getLength() {
              return count;
          }
      }
  
      private Buffer buffer_;
  
      /**
       * Constructs a new empty buffer.
       */
      public DataInputBuffer() {
          this(new Buffer());
      }
  
      private DataInputBuffer(Buffer buffer) {
          super(buffer);
          this.buffer_ = buffer;
      }
  
      /**
       * Resets the data that the buffer reads.
       */
      public void reset(byte[] input, int length) {
          buffer_.reset(input, 0, length);
      }
  
      /**
       * Resets the data that the buffer reads.
       */
      public void reset(byte[] input, int start, int length) {
          buffer_.reset(input, start, length);
      }
  
      /**
       * Returns the length of the input.
       */
      public int getLength() {
          return buffer_.getLength();
      }
  
      public int getPosition() {
          return buffer_.getPosition();
      }
  }
  