package org.gameoss.gridcast.p2p.serialization;
/*
* #%L
* Gridcast
* %%
* Copyright (C) 2014 Charles Barry
* %%
* 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.
* #L%
*/
import com.dyuproject.protostuff.ProtostuffIOUtil;
import com.dyuproject.protostuff.Schema;
import com.dyuproject.protostuff.runtime.RuntimeSchema;
import org.gameoss.gridcast.p2p.message.MessageRegistry;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufInputStream;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageDecoder;
import java.io.IOException;
import java.util.List;
public class ProtostuffDecoder extends MessageToMessageDecoder<ByteBuf>{
private final MessageRegistry registry;
public ProtostuffDecoder(MessageRegistry registry) {
this.registry = registry;
}
@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf msg, List<Object> out) throws Exception {
Object obj = deserializeFromByteBuf(registry,msg);
out.add(obj);
}
/**
* Expose deserializer for unit testing.
*
* @param registry
* @param buf
* @return
* @throws IOException
*/
public static Object deserializeFromByteBuf(MessageRegistry registry, ByteBuf buf) throws IOException {
// get message class
int typeIdx = buf.readInt();
Class<?> clazz = registry.getClassFromId(typeIdx);
// decode rest of array into object
Schema schema = RuntimeSchema.getSchema(clazz);
Object obj = schema.newMessage();
ProtostuffIOUtil.mergeFrom(new ByteBufInputStream(buf),obj,schema);
return obj;
}
}