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.aliyun.oss.common.comm.io;
  
  import java.io.IOException;
  import java.io.InputStream;
  
  public class FixedLengthInputStream extends InputStream {
  
      private InputStream wrappedInputStream = null;
      private long length = 0;
  
      public FixedLengthInputStream(InputStream instream, long length) {
          if (instream == null || length < 0) {
              throw new IllegalArgumentException("Illegal input stream or length");
          }
  
          this.wrappedInputStream = instream;
          this.length = length;
      }
  
      public void reset() throws IOException {
          wrappedInputStream.reset();
      }
  
      public boolean markSupported() {
          return wrappedInputStream.markSupported();
      }
  
      public synchronized void mark(int readlimit) {
          wrappedInputStream.mark(readlimit);
      }
  
      public int available() throws IOException {
          return wrappedInputStream.available();
      }
  
      @Override
      public long skip(long n) throws IOException {
          return wrappedInputStream.skip(n);
      }
  
      public InputStream getWrappedInputStream() {
          return wrappedInputStream;
      }
  
      public void setWrappedInputStream(InputStream instream) {
          this.wrappedInputStream = instream;
      }
  
      public long getLength() {
          return length;
      }
  
      public void setLength(long length) {
          this.length = length;
      }
  
      @Override
      public int read() throws IOException {
          return wrappedInputStream.read();
      }
  }
  