/*
* 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.
*/

#ifndef AXIS2_SVC_SKELETON_H
#define AXIS2_SVC_SKELETON_H

/**
 * @defgroup axis2_soc_api service API
 * @ingroup axis2
 * @{
 * @}
 */

/**
 * @defgroup axis2_svc_skeleton service skeleton
 * @ingroup axis2_svc_api
 * service skeleton API should be implemented by all services
 * that are to be deployed with Axis2/C engine.
 * @{
 */

/**
 * @file axis2_svc_skeleton.h
 */

#include <axiom_node.h>
#include <axutil_array_list.h>
#include <axis2_msg_ctx.h>

#ifdef __cplusplus
extern "C"
{
#endif

    /** Type name for struct axis2_svc_skeleton_ops */
    typedef struct axis2_svc_skeleton_ops axis2_svc_skeleton_ops_t;

    /** Type name for struct axis2_svc_skeleton */
    typedef struct axis2_svc_skeleton axis2_svc_skeleton_t;

    /**
     * service skeleton ops struct.
     * Encapsulator struct for operations of axis2_svc_skeleton.
     */
    struct axis2_svc_skeleton_ops
    {

        /**
         * Initializes the service implementation.
         * @param svc_skeleton pointer to svc_skeleton struct
         * @param env pointer to environment struct
         * @return AXIS2_SUCCESS on success, else AXIS2_FAILURE
         */
        int(
            AXIS2_CALL
            * init)(
                axis2_svc_skeleton_t * svc_skeleton,
                const axutil_env_t * env);

        /**
         * Invokes the service. This function should be used to call up the
         * functions implementing service operations.
         * @param svc_skeli pointer to svc_skeli struct
         * @param env pointer to environment struct
         * @param node pointer to node struct
         * @param msg_ctx pointer to message context struct
         * @return pointer to AXIOM node resulting from the invocation. 
         * In case of one way operations, NULL would be returned with 
         * status in environment error set to AXIS2_SUCCESS. On error
         * NULL would be returned with error status set to AXIS2_FAILURE
         */
        axiom_node_t *(
            AXIS2_CALL
            * invoke)(
                axis2_svc_skeleton_t * svc_skeli,
                const axutil_env_t * env,
                axiom_node_t * node,
                axis2_msg_ctx_t * msg_ctx);

        /**
         * This method would be called if a fault is detected.
         * @param svc_skeli pointer to svc_skeli struct
         * @param env pointer to environment struct
         * @param node pointer to node struct
         * @return pointer to AXIOM node reflecting the fault, NULL on error
         */
        axiom_node_t *(
            AXIS2_CALL
            * on_fault)(
                axis2_svc_skeleton_t * svc_skeli,
                const axutil_env_t * env,
                axiom_node_t * node);

        /**
         * Frees service implementation.
         * @param svc_skeli pointer to svc_skeli struct
         * @param env pointer to environment struct
         * @return AXIS2_SUCCESS on success, else AXIS2_FAILURE
         */
        int(
            AXIS2_CALL
            * free)(
                axis2_svc_skeleton_t * svc_skeli,
                const axutil_env_t * env);

        /**
         * Initializes the service implementation.
         * @param svc_skeleton pointer to svc_skeleton struct
         * @param env pointer to environment struct
         * @param conf pointer to axis2c configuration struct
         * @return AXIS2_SUCCESS on success, else AXIS2_FAILURE
         */
        int(
            AXIS2_CALL
            * init_with_conf)(
                axis2_svc_skeleton_t * svc_skeleton,
                const axutil_env_t * env,
                struct axis2_conf * conf);
    };

    /**
     * service skeleton struct.
     */
    struct axis2_svc_skeleton
    {

        /** operations of service skeleton */
        const axis2_svc_skeleton_ops_t *ops;

        /** Array list of functions, implementing the service operations */
        axutil_array_list_t *func_array;
    };

    /*************************** Function macros **********************************/

    /** Initialize the svc skeleton.
        @sa axis2_svc_skeleton_ops#init */
#define AXIS2_SVC_SKELETON_INIT(svc_skeleton, env) \
      ((svc_skeleton)->ops->init (svc_skeleton, env))

    /** Initialize the svc skeleton with axis2c configuration struct.
        @sa axis2_svc_skeleton_ops#init_with_conf */
#define AXIS2_SVC_SKELETON_INIT_WITH_CONF(svc_skeleton, env, conf) \
      ((svc_skeleton)->ops->init_with_conf (svc_skeleton, env, conf))

    /** Frees the svc skeleton.
        @sa axis2_svc_skeleton_ops#free */
#define AXIS2_SVC_SKELETON_FREE(svc_skeleton, env) \
      ((svc_skeleton)->ops->free (svc_skeleton, env))

    /** Invokes axis2 service skeleton.
        @sa axis2_svc_skeleton_ops#invoke */
#define AXIS2_SVC_SKELETON_INVOKE(svc_skeleton, env, node, msg_ctx) \
      ((svc_skeleton)->ops->invoke (svc_skeleton, env, node, msg_ctx))

    /** Called on fault.
        @sa axis2_svc_skeleton_ops#on_fault */
#define AXIS2_SVC_SKELETON_ON_FAULT(svc_skeleton, env, node) \
      ((svc_skeleton)->ops->on_fault (svc_skeleton, env, node))

    /** @} */

#ifdef __cplusplus
}
#endif

#endif                          /* AXIS2_SVC_SKELETON_H */