com.codnos.dbgp.internal.handlers.DBGpCommandDecoder.java Source code

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Here is the source code for com.codnos.dbgp.internal.handlers.DBGpCommandDecoder.java

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/*
 * Copyright 2016 Codnos Ltd.
 *
 * Licensed 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.codnos.dbgp.internal.handlers;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;
import io.netty.util.ByteProcessor;

import java.util.List;

import static java.nio.charset.StandardCharsets.UTF_8;

public class DBGpCommandDecoder extends ByteToMessageDecoder {

    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> objects) throws Exception {
        int nullPosition = in.forEachByte(ByteProcessor.FIND_NUL);
        if (nullPosition < 0)
            return;
        int length = nullPosition - in.readerIndex();
        ByteBuf msgBuffer = in.readBytes(length);
        in.readByte();
        objects.add(msgBuffer.toString(UTF_8));
        msgBuffer.release();
    }
}