| /* |
| * 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 org.apache.jackrabbit.oak.segment.test.proxy; |
| |
| import io.netty.buffer.ByteBuf; |
| import io.netty.channel.ChannelHandlerContext; |
| import io.netty.channel.ChannelInboundHandlerAdapter; |
| |
| class FlipHandler extends ChannelInboundHandlerAdapter { |
| |
| private int current; |
| |
| private int flip; |
| |
| FlipHandler(int pos) { |
| this.flip = pos; |
| } |
| |
| @Override |
| public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception { |
| if (msg instanceof ByteBuf) { |
| onByteBuf((ByteBuf) msg); |
| } |
| ctx.fireChannelRead(msg); |
| } |
| |
| private void onByteBuf(ByteBuf b) { |
| int i = flip - current; |
| if (0 <= i && i < b.readableBytes()) { |
| b.setByte(i, ~b.getByte(i)); |
| } |
| current += b.readableBytes(); |
| } |
| |
| } |