/*
 * 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 org.apache.axis2.async;

import org.apache.axiom.om.OMElement;
import org.apache.axiom.soap.SOAPEnvelope;
import org.apache.axiom.soap.SOAPFactory;
import org.apache.axis2.AxisFault;
import org.apache.axis2.context.MessageContext;
import org.apache.axis2.description.AxisOperation;
import org.apache.axis2.description.AxisService;
import org.apache.axis2.i18n.Messages;
import org.apache.axis2.receivers.AbstractInOutMessageReceiver;

import java.lang.reflect.Method;

public class AsyncMessageReceiver extends AbstractInOutMessageReceiver {

    public void invokeBusinessLogic(MessageContext msgContext,
                                    MessageContext newmsgContext) throws AxisFault {
        try {
            // get the implementation class for the Web Service
            Object obj = getTheImplementationObject(msgContext);

            // find the WebService method
            Class<?> ImplClass = obj.getClass();

            AxisOperation opDesc = msgContext.getOperationContext().getAxisOperation();
            Method method = findOperation(opDesc, ImplClass);

            if (method != null) {
                Class<?>[]  parameters = method.getParameterTypes();
                Object[] args;

                if ((parameters == null) || (parameters.length == 0)) {
                    args = new Object[0];
                } else if (parameters.length == 1) {
                    OMElement omElement = msgContext.getEnvelope().getBody().getFirstElement();
                    args = new Object[] { omElement };
                } else {
                    throw new AxisFault(Messages.getMessage("rawXmlProivdeIsLimited"));
                }

                OMElement result = (OMElement)method.invoke(obj, args);
                AxisService service = msgContext.getAxisService();
                service.getTargetNamespace();
                result.declareNamespace(service.getTargetNamespace(),
                                        service.getTargetNamespacePrefix());
                OMElement bodyContent;

                SOAPFactory fac = getSOAPFactory(msgContext);
                bodyContent = result;

                SOAPEnvelope envelope = fac.getDefaultEnvelope();

                if (bodyContent != null) {
                    envelope.getBody().addChild(bodyContent);
                }

                newmsgContext.setEnvelope(envelope);
            } else {
                throw new AxisFault(Messages.getMessage("methodNotImplemented",
                                                        opDesc.getName().toString()));
            }
        } catch (Exception e) {
            throw AxisFault.makeFault(e);
        }
    }

    public Method findOperation(AxisOperation op, Class<?> ImplClass) {
        Method method = null;
        String methodName = op.getName().getLocalPart();
        Method[] methods = ImplClass.getMethods();

        for (int i = 0; i < methods.length; i++) {
            if (methods[i].getName().equals(methodName)) {
                method = methods[i];

                break;
            }
        }

        return method;
    }
}