package org.jastacry.layer;
   
   import java.io.IOException;
   import java.io.InputStream;
   import java.io.OutputStream;
   import java.util.Objects;
   
   import org.jastacry.JastacryException;
   
  /**
   * Very simple algorithm just to infuse some more complex data rotation.
   *
   * <p>SPDX-License-Identifier: MIT
   *
   * @author Kai Kretschmann
   */
  public class XorLayer extends AbstractBasicLayer
  {
      /**
       * static name of the layer.
       */
      public static final String LAYERNAME = "Xor Layer";
      /**
       * private byte mask to xor with.
       */
      private byte bitMask;
  
      /**
       * Constructor of XorLayer.
       */
      public XorLayer()
      {
          super(XorLayer.class, LAYERNAME);
      }
  
      /**
       * init function.
       *
       * @param data to initialize the xor value.
       */
      @Override
      public final void init(final String data)
      {
          this.bitMask = (byte) Integer.parseInt(data);
      }
  
      /**
       * Local encode Stream function which does the real thing for Xor Layer.
       *
       * @param inputStream incoming data
       * @param outputStream outgoing data
       * @throws JastacryException thrown on error
       */
      public final void encodeAndDecode(final InputStream inputStream, final OutputStream outputStream) throws JastacryException
      {
          try
          {
              int iChar;
              byte bChar;
              while ((iChar = inputStream.read()) != -1)
              { // NOPMD by kai on 21.11.17 17:18
                  bChar = (byte) iChar; // NOPMD by kai on 21.11.17 17:18
                  bChar = (byte) (bChar ^ this.bitMask);
                  outputStream.write(bChar);
              }
              logger.info("close pipe");
              outputStream.close();
          }
          catch (IOException e)
          {
              throw (JastacryExceptionl#JastacryException">JastacryException) new JastacryException("encodeAndDecode failed").initCause(e);
          }
      }
  
      /**
       * Override equals method from object class.
       * @param o object to compare with
       * @return true or false
       */
      @Override
      public boolean equals(final Object o)
      {
          return o == this || o instanceof XorLayer/../org/jastacry/layer/XorLayer.html#XorLayer">XorLayer && ((XorLayer) o).bitMask == this.bitMask;
      }
  
      /**
       * Override equals method from object class.
       * @return hash of properties
       */
      @Override
      public int hashCode()
      {
          return Objects.hash(bitMask);
      }
  }