Experimental

.github/workflows/build.yml

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+name: Build
+
+on: [pull_request]
+
+jobs:
+  compile:
+    runs-on: ubuntu-latest
+    name: Build
+    steps:
+      - uses: actions/checkout@master
+      - name: Setup java
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+      - run: mvn clean install -Dcheckstyle.skip -q

.github/workflows/checkstyle.yml

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+name: Checkstyle
+
+on: [pull_request]
+
+jobs:
+  compile:
+    runs-on: ubuntu-latest
+    name: Checkstyle
+    steps:
+      - uses: actions/checkout@master
+      - name: Setup java
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+      - run: mvn checkstyle:check -q

.gitignore

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+
+# Created by https://www.gitignore.io/api/java,maven,eclipse,netbeans,intellij+all
+# Edit at https://www.gitignore.io/?templates=java,maven,eclipse,netbeans,intellij+all
+
+### Eclipse ###
+.metadata
+bin/
+tmp/
+*.tmp
+*.bak
+*.swp
+*~.nib
+local.properties
+.settings/
+.loadpath
+.recommenders
+
+# External tool builders
+.externalToolBuilders/
+
+# Locally stored "Eclipse launch configurations"
+*.launch
+
+# PyDev specific (Python IDE for Eclipse)
+*.pydevproject
+
+# CDT-specific (C/C++ Development Tooling)
+.cproject
+
+# CDT- autotools
+.autotools
+
+# Java annotation processor (APT)
+.factorypath
+
+# PDT-specific (PHP Development Tools)
+.buildpath
+
+# sbteclipse plugin
+.target
+
+# Tern plugin
+.tern-project
+
+# TeXlipse plugin
+.texlipse
+
+# STS (Spring Tool Suite)
+.springBeans
+
+# Code Recommenders
+.recommenders/
+
+# Annotation Processing
+.apt_generated/
+
+# Scala IDE specific (Scala & Java development for Eclipse)
+.cache-main
+.scala_dependencies
+.worksheet
+
+### Eclipse Patch ###
+# Eclipse Core
+.project
+
+# JDT-specific (Eclipse Java Development Tools)
+.classpath
+
+# Annotation Processing
+.apt_generated
+
+.sts4-cache/
+
+### Intellij+all ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and WebStorm
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+### Intellij+all Patch ###
+# Ignores the whole .idea folder and all .iml files
+# See https://github.com/joeblau/gitignore.io/issues/186 and https://github.com/joeblau/gitignore.io/issues/360
+
+.idea/
+
+# Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-249601023
+
+*.iml
+modules.xml
+.idea/misc.xml
+*.ipr
+
+# Sonarlint plugin
+.idea/sonarlint
+
+### Java ###
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+### Maven ###
+target/
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+.mvn/timing.properties
+.mvn/wrapper/maven-wrapper.jar
+.flattened-pom.xml
+
+### NetBeans ###
+**/nbproject/private/
+**/nbproject/Makefile-*.mk
+**/nbproject/Package-*.bash
+build/
+nbbuild/
+dist/
+nbdist/
+.nb-gradle/
+
+# End of https://www.gitignore.io/api/java,maven,eclipse,netbeans,intellij+all

README.md

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+![GitHub](https://img.shields.io/github/license/E-edu/java-common)
+![GitHub top language](https://img.shields.io/github/languages/top/E-edu/java-common)
+
+![GitHub tag (latest by date)](https://img.shields.io/github/v/tag/E-edu/java-common)
+
+![GitHub last commit (branch)](https://img.shields.io/github/last-commit/E-Edu/java-common/master?label=last%20commit%20%28master%29)
+![GitHub last commit (branch)](https://img.shields.io/github/last-commit/E-Edu/java-common/experimental?label=last%20commit%20%28experimental%29)
+
+# Gewia Common
+
+This project contains the commonly shared code for all our
+java based micro services (e.g. task and gateway).
+
+This repository also is our reference implementation for some things.
+
+## Scope
+![Maven Central](https://img.shields.io/maven-central/v/com.gewia.common/scope)
+
+[Based on this meeting changelog](https://github.com/E-Edu/concept/blob/master/changelog/meeting/20200420-conceptmeeting.md#8-roles--permissions)
+
+We have a custom implementation of the widely known "scopes" used in OAuth2 for example.
+
+This implementation standardized scopes for
+every Gewia related project - so this is the reference implementation.
+
+Some special features:
+- Implementations with and without restrictions
+    - BasicScope (no restrictions)
+    - MicroServiceScope
+        - microService.topic.mode.scope.extra
+- Merging (and de-merging)
+    - user.email.read+write+delete.all+beta
+- Pre-defined scopes
+    - none (default)
+    - own
+    - self (only applicable to topics regarding a user itself)
+    - all
+    - beta
+- Pre-defined modes
+    - read
+    - write
+    - delete
+
+## License
+
+This project is licensed under the MIT license.