Model Modeling Language CLI

The Model Modeling Language (MML) is a domain-specific modeling language implemented with the open-source language engineering tool Langium. This repository contains a CLI that serves as a link between the Javascript-based MML and the Java-based Eclipse Modeling Framework as well as the HiPE Pattern Matcher.

The CLI can be integrated directly in the VSCode plugin of MML in order to access individual functions directly from the user interface, but it can also be executed in the command line, in which case inputs must be available as a file.

---

ℹ️ The CLI requires at least Java 17!

---

• How to build
• Usage

How to build

1. Make sure that a Java JDK is installed that fulfills the requirements

2. Build the CLI using Maven

   mvn package
   

   Note: The first build may fail because local dependencies are not found. In this case, use:

   mvn clean validate package -U
   

Usage

Usage with the MML VSCode plugin

Install the MML VSCode plugin according to the corresponding instructions. Also build the CLI as a JAR file. Open the VSCode settings and navigate to the "Model Modeling Language" section under "Extensions". Enter the path to the Jar file in the field provided.

🎉 You can now use the Modeling Language to its full extent directly in VSCode!

Stand-alone use

The CLI can also be used independently of the VSCode plugin. In this case, input and output are usually via files, the path of which is also specified in the command.

In general, the CLI can be called by executing the JAR file.

java -jar ./target/model-modeling-language-cli-1.0-SNAPSHOT.jar

In the following we use the alias mmlcli.

Usage: mmlcli [-hV] [COMMAND]
            -h, --help Show this help message and exit.
            -V, --version Print version information and exit.

Generate

The generate command is used to generate Ecore and XMI files from the serialized MML format. By default, the input is via STDIN, the output is in the form of the generated files in a specified directory. Optionally, a file whose content is in serialized MML format can be specified instead of the STDIN input.

Usage: mmlcli generate [-f[=SERIALIZED]] <projectName> <outputDirectory>
            <projectName>           Name of the entire project/workspace
            <outputDirectory>       Path to the output directory
            -f, --file[=SERIALIZED] Path to the serialized workspace as json file

Serialize

The serialize command is used to serialize Ecore files into the MML format. The entry is made by specifying a path to an Ecore file. The output is via STDOUT by default, but optionally a path to an output file can also be specified in which the serialized model is to be saved.

Usage: mmlcli serialize [-o[=SERIALIZED]] <ecoreFile>
            <ecoreFile>             Path to an Ecore file
            -o, --out[=SERIALIZED]  Path to the output directory

Extender

The extender command is used to extend all metamodel classes in a metamodel by a common superclass. This superclass adds a nodeId attribute to all classes, which is used to assign unique identifiers. This attribute is initialized for all elements in the transferred model.

Usage: mmlcli extender [-hV] [-i[=(true|false)]] <ecoreFile> <modelFile>
Extend a metamodel and model with a unique node identifier
      <ecoreFile>   path to the Ecore file containing the metamodel
      <modelFile>   path to the XMI file containing the model
  -h, --help        Show this help message and exit.
  -i, --invert[=(true|false)]
                    remove identifiers if present
  -V, --version     Print version information and exit.

Modelserver

The modelserver command is used to generate a ModelServer for constraint evaluation. Both metamodel-specific and constraint-specific code is generated and compiled.

Usage: mmlcli modelserver [-hV] [-e[=(true|false)]] [-f[=path]] [-p[=
                          (true|false)]] [-r[=(true|false)]] [-v[=
                          (true|false)]] <workspacePath> <ecorePath> <modelPath>
Generate a ModelServer
      <workspacePath>   path to the working directory of the ModelServer
      <ecorePath>       path to the Ecore file containing the metamodel
      <modelPath>       path to the XMI file containing the model
  -e, --[no-]run-model-extender[=(true|false)]
                        add unique identifiers to the metamodel and model
                          before generating the ModelServer
  -f, --file[=path]     path to a serialized constraint document
  -h, --help            Show this help message and exit.
  -p, --package-jar[=(true|false)]
                        pack the ModelServer into a Jar file
  -r, --[no-]run-model-server[=(true|false)]
                        start the ModelServer after generation is complete
  -v, --verbose[=(true|false)]
                        prints extended compiler output
  -V, --version         Print version information and exit.