/* | |
* 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.rpc.filter; | |
import java.lang.reflect.Method; | |
import java.lang.reflect.Type; | |
import com.alibaba.dubbo.common.Constants; | |
import com.alibaba.dubbo.common.logger.Logger; | |
import com.alibaba.dubbo.common.logger.LoggerFactory; | |
import com.alibaba.dubbo.common.utils.CompatibleTypeUtils; | |
import com.alibaba.dubbo.common.utils.PojoUtils; | |
import com.alibaba.dubbo.rpc.Filter; | |
import com.alibaba.dubbo.rpc.Invocation; | |
import com.alibaba.dubbo.rpc.Invoker; | |
import com.alibaba.dubbo.rpc.Result; | |
import com.alibaba.dubbo.rpc.RpcException; | |
import com.alibaba.dubbo.rpc.RpcResult; | |
/** | |
* CompatibleFilter | |
* | |
* @author william.liangf | |
*/ | |
public class CompatibleFilter implements Filter { | |
private static Logger logger = LoggerFactory.getLogger(CompatibleFilter.class); | |
public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException { | |
Result result = invoker.invoke(invocation); | |
if (! invocation.getMethodName().startsWith("$") && ! result.hasException()) { | |
Object value = result.getValue(); | |
if (value != null) { | |
try { | |
Method method = invoker.getInterface().getMethod(invocation.getMethodName(), invocation.getParameterTypes()); | |
Class<?> type = method.getReturnType(); | |
Object newValue; | |
String serialization = invoker.getUrl().getParameter(Constants.SERIALIZATION_KEY); | |
if ("json".equals(serialization) | |
|| "fastjson".equals(serialization)){ | |
Type gtype = method.getGenericReturnType(); | |
newValue = PojoUtils.realize(value, type, gtype); | |
} else if (! type.isInstance(value)) { | |
newValue = PojoUtils.isPojo(type) | |
? PojoUtils.realize(value, type) | |
: CompatibleTypeUtils.compatibleTypeConvert(value, type); | |
} else { | |
newValue = value; | |
} | |
if (newValue != value) { | |
result = new RpcResult(newValue); | |
} | |
} catch (Throwable t) { | |
logger.warn(t.getMessage(), t); | |
} | |
} | |
} | |
return result; | |
} | |
} |