Package com.bj58.spat.gaea.client.proxy.builder

Source Code of com.bj58.spat.gaea.client.proxy.builder.MethodCaller

/*
*  Copyright Beijing 58 Information Technology Co.,Ltd.
*
*  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 com.bj58.spat.gaea.client.proxy.builder;

import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;

import com.bj58.spat.gaea.client.proxy.ServiceProxy;
import com.bj58.spat.gaea.client.proxy.ServiceProxy.InvokeResult;
import com.bj58.spat.gaea.client.utility.logger.ILog;
import com.bj58.spat.gaea.client.utility.logger.LogFactory;
import com.bj58.spat.gaea.server.contract.annotation.AnnotationUtil;
import com.bj58.spat.gaea.server.contract.annotation.OperationContract;
import com.bj58.spat.gaea.server.contract.entity.Out;

/**
* MethodCaller
*
* @author Service Platform Architecture Team (spat@58.com)
*/
public class MethodCaller {

  private static final ILog logger = LogFactory.getLogger(MethodCaller.class);
  private String serviceName;
    private String lookup;
   

    public MethodCaller(String serviceName, String lookup) {
        this.serviceName = serviceName;
        this.lookup = lookup;
    }

    public Object doMethodCall(Object[] args, Method methodInfo) throws Exception, Throwable {
        Type[] typeAry = methodInfo.getGenericParameterTypes();
        Class<?>[] clsAry = methodInfo.getParameterTypes();
        if (args == null) {
            args = new Object[0];
        }
        if (args.length != typeAry.length) {
            throw new Exception("argument count error!");
        }

        ServiceProxy proxy = ServiceProxy.getProxy(serviceName);
        Parameter[] paras = new Parameter[args.length];
        List<Integer> outParas = new ArrayList<Integer>();

        if (typeAry != null) {
            for (int i = 0; i < typeAry.length; i++) {
                if (args[i] instanceof Out) {
                    paras[i] = new Parameter(args[i], clsAry[i], typeAry[i], ParaType.Out);
                    outParas.add(i);
                } else {
                    paras[i] = new Parameter(args[i], clsAry[i], typeAry[i], ParaType.In);
                }
            }
        }
        Parameter returnPara = new Parameter(null, methodInfo.getReturnType(), methodInfo.getGenericReturnType());
        String methodName = methodInfo.getName();
        OperationContract ann = methodInfo.getAnnotation(OperationContract.class);
        if (ann != null) {
            if (!ann.methodName().equals(AnnotationUtil.DEFAULT_VALUE)) {
                methodName = "$" + ann.methodName();
            }
        }
        InvokeResult result = proxy.invoke(returnPara, lookup, methodName, paras);

        if (result != null && result.getOutPara() != null) {
            for (int i = 0; i < outParas.size() && i < result.getOutPara().length; i++) {
                Object op = args[outParas.get(i)];
                if(op instanceof Out){
                    ((Out)op).setOutPara(result.getOutPara()[i]);
                }
            }
        }
        return result.getResult();
    }
}
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