go code mapping.txt

{
	"FUNCNAME": "BAPI_EPM_SO_CREATE",
	"IMPORT_PARAMETER": [
		{
			"NAME": "HEADERDATA",package main

import (
	"encoding/json"
)

type generalinfo struct {
	Inactiveversion  string `json:"INACTIVE_VERSION"`
	Exceptionclasses string `json:"EXCEPTION_CLASSES"`
	Globalflag       string `json:"GLOBAL_FLAG"`
	Remotecall       string `json:"REMOTE_CALL"`
	Updatetask       string `json:"UPDATE_TASK"`
}

type properties struct {
	Kind        string `json:"KIND"`
	Typee       string `json:"TYPE"`
	Length      int    `json:"LENGTH"`
	Decimal     int    `json:"DECIMAL"`
	Description string `json:"DESCRIPTION"`
}

type element struct {
	Name       string     `json:"NAME"`
	Properties properties `json:"PROPERTIES"`
	Value      string     `json:"VALUE"`
	Additional []element  `json:"ADDITIONAL"`
}

type schema struct {
	Funcname              string      `json:"FUNCNAME"`
	Generalinfo           generalinfo `json:"GENERAL_INFO"`
	RequiredImportParam   []string    `json:"REQUIRED_IMPORT_PARAMETER"`
	Importparameter       []element   `json:"IMPORT_PARAMETER"`
	Exportparameter       []element   `json:"EXPORT_PARAMETER"`
	RequiredTablesParam   []string    `json:"REQUIRED_TABLES_PARAMETER"`
	Tablesparameter       []element   `json:"TABLES_PARAMETER"`
	RequiredChangingParam []string    `json:"REQUIRED_CHANGING_PARAMETER"`
	Changingparameter     []element   `json:"CHANGING_PARAMETER"`
}

type request struct {
	Funcname          string    `json:"FUNCNAME"`
	Importparameter   []element `json:"IMPORT_PARAMETER"`
	Tablesparameter   []element `json:"TABLES_PARAMETER"`
	Changingparameter []element `json:"CHANGING_PARAMETER"`
}

var Out func(interface{})

func main() {

}

func Input1(val interface{}){

    message := val.(string)
    schema := &schema{}
    err := json.Unmarshal([]byte(message), schema)
    if err == nil {
            request := buildFMRequest(schema)
		    r, _ := json.Marshal(request)
		    Out(string(r))
	}else{
	    Out("Error occurred")
	}
}

func buildFMRequest(schema *schema) request {

	r := &request{}
	r.Funcname = schema.Funcname
	buildImportParam(r, schema)
	buildTablesParam(r, schema)
	return *r
}

func buildImportParam(r *request, schema *schema) {
	for _, ele := range schema.Importparameter {
		switch ele.Name {
		    case "HEADERDATA":
		        e := &element{}
			    e.Name = ele.Name
    		    for _,add := range ele.Additional {
    		        switch add.Name{
    		            case "BUYER_ID":
                			buyerId := &element{}
                			buyerId.Name = add.Name
                			buyerId.Value = "0100000000"
                			e.Additional = append(e.Additional, *buyerId)
    			
                		case "BUYER_NAME":
                			buyerName := &element{}
                			buyerName.Name = add.Name
                			buyerName.Value = "SAP"
                			e.Additional = append(e.Additional, *buyerName)
                			
                		case "CURRENCY_CODE":
                			currCode := &element{}
                			currCode.Name = add.Name
                			currCode.Value = "EUR"
                			e.Additional = append(e.Additional, *currCode)
    		        }
    		    }
    		    r.Importparameter = append(r.Importparameter, *e)
    		    
    		case "PERSIST_TO_DB":
    		persist := &element{}
			persist.Name = ele.Name
			persist.Value = ""
			ele.Additional = append(ele.Additional, *persist)
			
			r.Importparameter = append(r.Importparameter, *persist)
	    }
	}
}

func buildTablesParam(r *request, schema *schema) {
    // Add table parameter ITEMDATA to TABLES_PARAMETER
    table := &element{}
    table.Name = "ITEMDATA"
    
    // If users wants to add more rows to the table, here can be a loop
    // Add one row to ITEMDATA
    e1 := &element{}
    e1.Name = "ITEMDATA"
    
    // Populate fields to the row
    note := &element{}
    note.Name = "NOTE"
    note.Value = "THIS IS A TEST SO CREATED BY DI"
    e1.Additional=append(e1.Additional, *note)
    
    grossAmount := &element{}
    grossAmount.Name = "GROSS_AMOUNT"
    grossAmount.Value = "734.20"
    e1.Additional=append(e1.Additional, *grossAmount)
    
    netAmount := &element{}
    netAmount.Name = "NET_AMOUNT"
    netAmount.Value = "645.20"
    e1.Additional=append(e1.Additional, *netAmount)
    
    taxAmount := &element{}
    taxAmount.Name = "TAX_AMOUNT"
    taxAmount.Value = "112.30"
    e1.Additional=append(e1.Additional, *taxAmount)
    
    deliveryDate := &element{}
    deliveryDate.Name = "DELIVERY_DATE"
    deliveryDate.Value = "20210320230000.0000000"
    e1.Additional=append(e1.Additional, *deliveryDate)
    
    quantity := &element{}
    quantity.Name = "QUANTITY"
    quantity.Value = "200"
    e1.Additional=append(e1.Additional, *quantity)
    
    // Feel free to add more fields here..
    
    //Apend the "row" to "table"
    table.Additional=append(table.Additional, *e1)
    
    //End loop
    
    //Apend the whole "table" to TABLES_PARAMETER
    r.Tablesparameter = append(r.Tablesparameter, *table)
    
    returnn := &element{}
    returnn.Name = "RETURN"
    
    r.Tablesparameter = append(r.Tablesparameter, *returnn)
}
			"PROPERTIES": {
				"KIND": "",
				"TYPE": "",
				"LENGTH": 0,
				"DECIMAL": 0,
				"DESCRIPTION": ""
			},
			"VALUE": "",
			"ADDITIONAL": [
				{
					"NAME": "BUYER_ID",
					"PROPERTIES": {
						"KIND": "",
						"TYPE": "",
						"LENGTH": 0,
						"DECIMAL": 0,
						"DESCRIPTION": ""
					},
					"VALUE": "0100000000",
					"ADDITIONAL": null
				},
				{
					"NAME": "BUYER_NAME",
					"PROPERTIES": {
						"KIND": "",
						"TYPE": "",
						"LENGTH": 0,
						"DECIMAL": 0,
						"DESCRIPTION": ""
					},
					"VALUE": "SAP",
					"ADDITIONAL": null
				},
				{
					"NAME": "CURRENCY_CODE",
					"PROPERTIES": {
						"KIND": "",
						"TYPE": "",
						"LENGTH": 0,
						"DECIMAL": 0,
						"DESCRIPTION": ""
					},
					"VALUE": "EUR",
					"ADDITIONAL": null
				}
			]
		},
		{
			"NAME": "PERSIST_TO_DB",
			"PROPERTIES": {
				"KIND": "",
				"TYPE": "",
				"LENGTH": 0,
				"DECIMAL": 0,
				"DESCRIPTION": ""
			},
			"VALUE": "",
			"ADDITIONAL": null
		}
	],
	"TABLES_PARAMETER": [
		{
			"NAME": "ITEMDATA",
			"PROPERTIES": {
				"KIND": "",
				"TYPE": "",
				"LENGTH": 0,
				"DECIMAL": 0,
				"DESCRIPTION": ""
			},
			"VALUE": "",
			"ADDITIONAL": [
				{
					"NAME": "ITEMDATA",
					"PROPERTIES": {
						"KIND": "",
						"TYPE": "",
						"LENGTH": 0,
						"DECIMAL": 0,
						"DESCRIPTION": ""
					},
					"VALUE": "",
					"ADDITIONAL": [
						{
							"NAME": "NOTE",
							"PROPERTIES": {
								"KIND": "",
								"TYPE": "",
								"LENGTH": 0,
								"DECIMAL": 0,
								"DESCRIPTION": ""
							},
							"VALUE": "THIS IS A TEST SO CREATED BY DI",
							"ADDITIONAL": null
						},
						{
							"NAME": "GROSS_AMOUNT",
							"PROPERTIES": {
								"KIND": "",
								"TYPE": "",
								"LENGTH": 0,
								"DECIMAL": 0,
								"DESCRIPTION": ""
							},
							"VALUE": "734.20",
							"ADDITIONAL": null
						},
						{
							"NAME": "NET_AMOUNT",
							"PROPERTIES": {
								"KIND": "",
								"TYPE": "",
								"LENGTH": 0,
								"DECIMAL": 0,
								"DESCRIPTION": ""
							},
							"VALUE": "645.20",
							"ADDITIONAL": null
						},
						{
							"NAME": "TAX_AMOUNT",
							"PROPERTIES": {
								"KIND": "",
								"TYPE": "",
								"LENGTH": 0,
								"DECIMAL": 0,
								"DESCRIPTION": ""
							},
							"VALUE": "112.30",
							"ADDITIONAL": null
						},
						{
							"NAME": "DELIVERY_DATE",
							"PROPERTIES": {
								"KIND": "",
								"TYPE": "",
								"LENGTH": 0,
								"DECIMAL": 0,
								"DESCRIPTION": ""
							},
							"VALUE": "20210320230000.0000000",
							"ADDITIONAL": null
						},
						{
							"NAME": "QUANTITY",
							"PROPERTIES": {
								"KIND": "",
								"TYPE": "",
								"LENGTH": 0,
								"DECIMAL": 0,
								"DESCRIPTION": ""
							},
							"VALUE": "200",
							"ADDITIONAL": null
						}
					]
				}
			]
		},
		{
			"NAME": "RETURN",
			"PROPERTIES": {
				"KIND": "",
				"TYPE": "",
				"LENGTH": 0,
				"DECIMAL": 0,
				"DESCRIPTION": ""
			},
			"VALUE": "",
			"ADDITIONAL": null
		}
	],
	"CHANGING_PARAMETER": null
}