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The project contains a module tools that can be used to test import/export of CGMES data and conversion to IIDM.

Test tool

There is a convenience bash script, runcgmes, that calls the test tool using the following command:

mvn test-compile exec:java --projects tools -Dexec.mainClass=com.powsybl.cgmes.tools.Main -Dexec.args="$*" -Ditools.config.dir=~/.itools -Dexec.classpathScope=test

The test tool accepts the following parameters:

--path, --basename, --compression are used to provide the network/case to import use. The input data may be a set of XML files in a folder, a single archive file (ZIP) ...

--tripleStore to indicate the implementation for the CGMES data store. The available options are rdf4j, jena and blazegraph.

--action the testing action to perform:

numObjectsByType outputs a table with the number of objects of each class that can be compared with CGMES conformity documentation.

allObjectsOfType <typeName> outputs a table with a row for every object of the given type and columns for all possible attributes.


Some example calls:

runcgmes --path data/cim14/ieee14 --tripleStore rdf4j --action numObjectsByType

runcgmes --path data/conformity/cas-1.1.3-data-4.0.3/MicroGrid/BaseCase/CGMES_v2.4.15_MicroGridTestConfiguration_BC_BE_v2 --tripleStore rdf4j --action numObjectsByType

runcgmes --path data/conformity/cas-2.0/MicroGrid/BaseCase_BC --basename CGMES_v2.4.15_MicroGridTestConfiguration_BC_NL_v2 --compression zip --tripleStore rdf4j --action numObjectsByType

runcgmes --path data/conformity/cas-1.1.3-data-4.0.3/MicroGrid/BaseCase/CGMES_v2.4.15_MicroGridTestConfiguration_BC_BE_v2 --tripleStore rdf4j --action allObjectsOfType ACLineSegment


This project depends on powsybl-core. It can be obtained and built using:

git clone https://github.com/powsybl/powsybl-core powsybl/powsybl-core
cd powsybl/powsybl-core && mvn install -DskipTests=true

Currently master branch of this projects depends on cgmes_validation branch of powsybl-core.


Jena and Blazegraph both depend directly on log4j.

When we try to run code from these libraries together with powsybl code that uses slf4j way of logging with a slf4-simple implementation, it complaints about multiple bindings:

SLF4J: Class path contains multiple SLF4J bindings
SLF4J: Found binding in [jar:file:.m2/repository/org/slf4j/slf4j-log4j12/1.7.12/slf4j-log4j12-1.7.12.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:.m2/repository/org/slf4j/slf4j-simple/1.7.22/slf4j-simple-1.7.22.jar!/org/slf4j/impl/StaticLoggerBinder.class]

To correctly use slf4j we must (see https://www.slf4j.org/legacy.html):

  • Exclude log4j from Jena and Blazegraph dependencies:

  • Add the dependency log4j-over-slf4j to bridge the legacy log4j API to the new slf4j:


Set-up development environment for Eclipse (Photon)

Steps for importing powsybl-core and CGMES maven projects are the same that in Eclipse Oxygen.

There is no need to create Eclipse .project files running mvn eclipse:eclipse. After maven projects import all natures are automatically recognized and set (Java, Groovy).

To fix the warnings about potential mismatch Groovy compiler version, it is enough to uncheck this option in Groovy Compiler settings in Eclipse.

To create a Java formatter from Checkstyle, first create and configure a new Global Checkstyle Configuration that uses the file checkstyle.xml (use the option external configuration file) and set it as default. Then, select any project in the workspace, right-click and select Checkstyle - Create Formatter profile. Then configure Java Code Style - Formatter as workspace settings (or by use it as project-specific settings).

Set-up development environment for Eclipse (Oxygen)

From git repository

First import project powsybl-core from git to local workspace.

Import maven projects

Then import existing Maven projects.

Projects may be assigned to separate working sets.

Create Eclipse project files

Create Eclipse .project files from maven pom.xml files using mvn eclipse:eclipse. This will add Java nature to the projects

First run mvn eclipse:eclipse from the root folder of the powsybl-core project

? It is possible that some individual projects may require mvn eclipse:eclipse to be run directly from its specific folder

Add support for Groovy

Some projects contain Groovy code, so we must install the corresponding plugin

Oxygen version is available at org.codehaus.groovy.eclipse.site

Install all components: Compilers, Eclipse plugin, Maven support and the uncategorized JDT patch

Fix the potential mismatch compiler version problem:

  • Project uses groovy compiler version 2.4, latest Groovy plugin uses 2.5
  • Go to project properties from a project containing groovy (action-dsl),
  • Then goto workspace settings and switch to compiler version 2.4.x

After installing the plugin, Eclipse may continue ignoring groovy code (not compiling it, a red exclamation mark will be put in every file). We have to convert all projects with groovy code to Groovy projects (right-click on project, configure, convert to groovy project).

After converting to Groovy projects it is possible that we have to fix the source configuration in Java build path:

  • Groovy classes compile (after previous step) but are not found from Eclipse
  • Eclipse says all types from groovy files are not found
  • For each project with groovy files:
    • Go to properties, java build path, source tab
    • For every source code folder related to groovy:
      • Change included list of files from **/*.java to **/*.groovy