package org.davidmoten.io.extras;
   
   import java.io.IOException;
   import java.io.InputStream;
   import java.io.OutputStream;
   import java.util.zip.GZIPInputStream;
   import java.util.zip.GZIPOutputStream;
   
   import org.davidmoten.io.extras.internal.TransformedInputStream;
  
  public final class IOUtil {
  
      private static final int DEFAULT_BUFFER_SIZE = 8192;
  
      private IOUtil() {
          // prevent instantiation
      }
  
      public static InputStream pipe(InputStream is, IOFunction<? super OutputStream, ? extends OutputStream> transform,
              int bufferSize) throws IOException {
          return new TransformedInputStream(is, transform, bufferSize);
      }
  
      public static InputStream pipe(InputStream is, IOFunction<? super OutputStream, ? extends OutputStream> transform)
              throws IOException {
          return pipe(is, transform, DEFAULT_BUFFER_SIZE);
      }
  
      public static InputStream gzip(InputStream is) throws IOException {
          return pipe(is, o -> new GZIPOutputStream(o));
      }
  
      public static InputStream gunzip(InputStream is) throws IOException {
          return new GZIPInputStream(is);
      }
  
  }