/*
* Copyright 1999-2011 Alibaba Group.
*
* 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.alibaba.dubbo.remoting.transport;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import com.alibaba.dubbo.common.Constants;
import com.alibaba.dubbo.common.URL;
import com.alibaba.dubbo.common.extension.ExtensionLoader;
import com.alibaba.dubbo.common.logger.Logger;
import com.alibaba.dubbo.common.logger.LoggerFactory;
import com.alibaba.dubbo.common.serialize.Serialization;
/**
* @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
*/
public class CodecSupport {
private static final Logger logger = LoggerFactory.getLogger(CodecSupport.class);
private CodecSupport() {
}
private static Map<Byte, Serialization> ID_SERIALIZATION_MAP = new HashMap<Byte, Serialization>();
static {
Set<String> supportedExtensions = ExtensionLoader.getExtensionLoader(Serialization.class).getSupportedExtensions();
for (String name : supportedExtensions) {
Serialization serialization = ExtensionLoader.getExtensionLoader(Serialization.class).getExtension(name);
byte idByte = serialization.getContentTypeId();
if (ID_SERIALIZATION_MAP.containsKey(idByte)) {
logger.error("Serialization extension " + serialization.getClass().getName()
+ " has duplicate id to Serialization extension "
+ ID_SERIALIZATION_MAP.get(idByte).getClass().getName()
+ ", ignore this Serialization extension");
continue;
}
ID_SERIALIZATION_MAP.put(idByte, serialization);
}
}
public static Serialization getSerializationById(Byte id) {
return ID_SERIALIZATION_MAP.get(id);
}
public static Serialization getSerialization(URL url) {
return ExtensionLoader.getExtensionLoader(Serialization.class).getExtension(
url.getParameter(Constants.SERIALIZATION_KEY, Constants.DEFAULT_REMOTING_SERIALIZATION));
}
public static Serialization getSerialization(URL url, Byte id) {
Serialization result = getSerializationById(id);
if (result == null) {
result = getSerialization(url);
}
return result;
}
}