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/**
 * Licensed to the University Corporation for Advanced Internet
 * Development, Inc. (UCAID) under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for
 * additional information regarding copyright ownership.
 *
 * UCAID 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.
 */

/**
 * @file xmltooling/io/GenericResponse.h
 * 
 * Interface to generic protocol responses that transport XML messages. 
 */

#ifndef __xmltooling_genres_h__
#define __xmltooling_genres_h__

#include <xmltooling/base.h>
#include <iostream>

namespace xmltooling {
    
    /**
     * Interface to generic protocol responses that transport XML messages.
     * 
     * <p>This interface need not be threadsafe.
     */
    class XMLTOOL_API GenericResponse {
        MAKE_NONCOPYABLE(GenericResponse);
    protected:
        GenericResponse();
    public:
        virtual ~GenericResponse();

        /**
         * Sets or clears the MIME type of the response.
         * 
         * @param type the MIME type, or nullptr to clear
         */
        virtual void setContentType(const char* type=nullptr)=0;

        /**
         * Sends a completed response to the client along with a
         * transport-specific "OK" indication. Used for "normal" responses.
         * 
         * @param inputStream   reference to source of response data
         * @return a result code to return from the calling MessageEncoder
         */
        virtual long sendResponse(std::istream& inputStream)=0;

        /**
         * Sends an "error" response to the client along with a
         * transport-specific error indication.
         * 
         * @param inputStream   reference to source of response data
         * @return a result code to return from the calling MessageEncoder
         */
        virtual long sendError(std::istream& inputStream)=0;

        /**
         * Sends a completed response to the client.
         * 
         * @param inputStream   reference to source of response data
         * @param status        transport-specific status to return
         * @return a result code to return from the calling MessageEncoder
         */
        virtual long sendResponse(std::istream& inputStream, long status)=0;
    };
};

#endif /* __xmltooling_genres_h__ */