/*
    * 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
    *
   *   https://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.commons.compress.archivers.zip;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.zip.Inflater;
  import java.util.zip.InflaterInputStream;
  
  import org.apache.commons.compress.utils.InputStreamStatistics;
  
  /**
   * Helper class to provide statistics
   *
   * @since 1.17
   */
  class InflaterInputStreamWithStatistics extends InflaterInputStream implements InputStreamStatistics {
  
      private long compressedCount;
      private long uncompressedCount;
  
      InflaterInputStreamWithStatistics(final InputStream in) {
          super(in);
      }
  
      InflaterInputStreamWithStatistics(final InputStream in, final Inflater inf) {
          super(in, inf);
      }
  
      InflaterInputStreamWithStatistics(final InputStream in, final Inflater inf, final int size) {
          super(in, inf, size);
      }
  
      @Override
      protected void fill() throws IOException {
          super.fill();
          compressedCount += inf.getRemaining();
      }
  
      @Override
      public long getCompressedCount() {
          return compressedCount;
      }
  
      @Override
      public long getUncompressedCount() {
          return uncompressedCount;
      }
  
      @Override
      public int read() throws IOException {
          final int b = super.read();
          if (b > -1) {
              uncompressedCount++;
          }
          return b;
      }
  
      @Override
      public int read(final byte[] b, final int off, final int len) throws IOException {
          final int bytes = super.read(b, off, len);
          if (bytes > -1) {
              uncompressedCount += bytes;
          }
          return bytes;
      }
  }