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/*
 * Copyright 2013 Red Hat Inc. and/or its affiliates and other contributors.
 *
 * 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 org.switchyard.component.soap.endpoint;

import java.util.List;
import java.util.Map;

import javax.annotation.Resource;
import javax.xml.soap.MimeHeaders;
import javax.xml.soap.SOAPMessage;
import javax.xml.ws.BindingType;
import javax.xml.ws.Provider;
import javax.xml.ws.Service.Mode;
import javax.xml.ws.ServiceMode;
import javax.xml.ws.WebServiceContext;
import javax.xml.ws.WebServiceProvider;
import javax.xml.ws.handler.MessageContext;
import javax.xml.ws.soap.SOAPBinding;

import org.switchyard.common.type.Classes;
import org.switchyard.component.soap.InboundHandler;

/**
 * This is the abstract base class for a SOAP messages.
 *
 * @author Magesh Kumar B  (C) 2011 Red Hat Inc.
 */
@WebServiceProvider
@ServiceMode(Mode.MESSAGE)
@BindingType(SOAPBinding.SOAP12HTTP_BINDING) // Actually accepts both 1.1 and 1.2; needs to be present for ws-security to work.
public class BaseWebService implements Provider {

    private static String ACTION_EQUALS = "action=";
    private static String CONTENT_TYPE_L = "Content-type";
    private static String CONTENT_TYPE = "Content-Type";

    private InboundHandler _serviceConsumer;
    private ClassLoader _invocationClassLoader;

    @Resource
    private WebServiceContext _wsContext;

    /**
     * Contruct a generic Webservice.
     */
    public BaseWebService() {
    }

    /**
     * Sets the service handler.
     * @param serviceConsumer the service handler.
     */
    public void setConsumer(final InboundHandler serviceConsumer) {
        _serviceConsumer = serviceConsumer;
    }

    /**
     * Sets the Invocation TCCL.
     * @param classLoader the classloader to be set.
     */
    public void setInvocationClassLoader(final ClassLoader classLoader) {
        _invocationClassLoader = classLoader;
    }

    /**
     * The Webservice implementation method, invokes the service handler.
     * @param request the SOAP request
     * @return the SOAP response
     */
    public SOAPMessage invoke(final SOAPMessage request) {
        if (request != null) {
            // Workaround for SOAP1.2 SOAPAction. Although HTTP header has the action value it is missing in
            // the SOAPMessage's MimeHeader
            MimeHeaders mimeHeaders = request.getMimeHeaders();
            String[] mimeContentTypes = mimeHeaders.getHeader(CONTENT_TYPE);
            if (mimeContentTypes != null)  {
                String mimeContentType = mimeContentTypes[0];
                if ((mimeContentType != null) && (mimeContentType.indexOf(ACTION_EQUALS) == -1)) {
                    Map headers = (Map)_wsContext.getMessageContext().get(MessageContext.HTTP_REQUEST_HEADERS);
                    List contentTypes = (List)headers.get(CONTENT_TYPE_L);
                    if ((contentTypes == null) || (contentTypes.size() == 0)) {
                        contentTypes = (List)headers.get(CONTENT_TYPE);
                    }
                    if ((contentTypes != null) && (contentTypes.size() > 0)) {
                        int idx =  contentTypes.get(0).indexOf(ACTION_EQUALS);
                        if (idx > 0) {
                            String action = contentTypes.get(0).substring(idx + 7).replace("\"\"","\"");
                            mimeHeaders.setHeader(CONTENT_TYPE, mimeContentType + "; " + ACTION_EQUALS + action);
                        }
                    }
                }
            }
        }

        SOAPMessage response = null;
        ClassLoader original = Classes.setTCCL(_invocationClassLoader);
        try {
            response = _serviceConsumer.invoke(request, _wsContext);
        } finally {
            Classes.setTCCL(original);
        }
        return response;
    }
}





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