go-bo4e

README

go-bo4e

Business Objects for Energy (BO4E) Implementation in Go. Highlights are

• includes json tags for easy (un)marshalling
• comes with builtin validator logic
• is linted and has decent test coverage

This package (as of September 2021) implements

• BO Energiemenge
• BO Geschaeftspartner
• BO Lastgang
• BO Marktlokation
• BO Marktteilnehmer
• BO Messlokation
• BO Rechnung
• BO Vertrag
• BO Zaehler

so far.

Installation

go get github.com/hochfrequenz/go-bo4e

Breaking Changes introduced in v0.0.13 and v0.0.14:

• The struct that is embedded in all BusinessObjects is now called Geschaeftsobjekt (was BusinessObject <=v0.0.12) to be consistent with the official documentation
• BusinessObject is now the name of the interface that all structs with embedded Geschaeftsobjekt implement
• Enums are consistently written in upper case (PR 32)

Minimal Working Example

package main

import (
	"encoding/json"
	"fmt"
	"github.com/go-playground/validator/v10"
	"github.com/hochfrequenz/go-bo4e/bo"
	"github.com/hochfrequenz/go-bo4e/com"
	"github.com/hochfrequenz/go-bo4e/enum/botyp"
	"github.com/hochfrequenz/go-bo4e/enum/landescode"
	"github.com/hochfrequenz/go-bo4e/enum/sparte"
)

func main() {
	melo := bo.Messlokation{
		Geschaeftsobjekt: bo.Geschaeftsobjekt{
			BoTyp:             botyp.MESSLOKATION,
			VersionStruktur:   "1",
			ExterneReferenzen: nil,
		},
		MesslokationsId: "DE0000011111222223333344444555556",
		Sparte:          sparte.STROM,
		Messadresse: &com.Adresse{
			Postleitzahl: "82031",
			Ort:          "Grünwald",
			Strasse:      "Nördliche Münchner Straße",
			Hausnummer:   "27A",
			Landescode:   landescode.DE,
		},
	}
	vali := validator.New()
	err := vali.Struct(melo)
	if err == nil {
		fmt.Println("The MeLo is valid.")
	}
	meloBytes, err := json.Marshal(melo)
	meloJson := string(meloBytes)
	fmt.Print(meloJson)
}

Use this in the Go Playground.

Other Noteworthy BO4E Implementations

• C# / .NET
• Python
• Kotlin

Contributing

Contributions are welcome. Feel free to open a Pull Request against the main branch of this repository. Please provide unit tests if you contribute logic beyond bare bare business object definitions. We do track our modification proposals to the official BO4E standard in a separate repository: BO4E-modification-proposals.

Adding Enums

When adding Enums there are two packages (stringer, jsonenums) needed to go-generate additional files, which contain an implementation of the fmt.Stringer and json.Marshaler interface for the respective enum. Since they are just needed for the code generation, but not a real dependency we don't want them in the go.mod file. One way to install them is outside of your directory with:

go install github.com/campoy/jsonenums@latest
go install golang.org/x/tools/cmd/stringer@latest

Hochfrequenz

Hochfrequenz Unternehmensberatung GmbH is a Grünwald (near Munich) based consulting company with offices in Berlin and Bremen. We're not only the main contributor to open source BO4E software but, according to Kununu ratings, also among the most attractive employers within the German energy market. Applications of talented developers are welcome at any time! Please consider visiting our career page ( German only).