Module provided by the JDK do not require a mapping

Author: jjohannes

src/main/java/de/jjohannes/gradle/moduledependencies/JDKInfo.java

@@ -0,0 +1,69 @@
+package de.jjohannes.gradle.moduledependencies;
+
+import java.util.Arrays;
+import java.util.List;
+
+public interface JDKInfo {
+    List<String> MODULES = Arrays.asList(
+            "java.base",
+            "java.compiler",
+            "java.datatransfer",
+            "java.desktop",
+            "java.instrument",
+            "java.logging",
+            "java.management",
+            "java.management.rmi",
+            "java.naming",
+            "java.net.http",
+            "java.prefs",
+            "java.rmi",
+            "java.scripting",
+            "java.se",
+            "java.security.jgss",
+            "java.security.sasl",
+            "java.smartcardio",
+            "java.sql",
+            "java.sql.rowset",
+            "java.transaction.xa",
+            "java.xml",
+            "java.xml.crypto",
+            "jdk.accessibility",
+            "jdk.attach",
+            "jdk.charsets",
+            "jdk.compiler",
+            "jdk.crypto.cryptoki",
+            "jdk.crypto.ec",
+            "jdk.dynalink",
+            "jdk.editpad",
+            "jdk.hotspot.agent",
+            "jdk.httpserver",
+            "jdk.incubator.foreign",
+            "jdk.incubator.vector",
+            "jdk.jartool",
+            "jdk.javadoc",
+            "jdk.jcmd",
+            "jdk.jconsole",
+            "jdk.jdeps",
+            "jdk.jdi",
+            "jdk.jdwp.agent",
+            "jdk.jfr",
+            "jdk.jlink",
+            "jdk.jpackage",
+            "jdk.jshell",
+            "jdk.jsobject",
+            "jdk.jstatd",
+            "jdk.localedata",
+            "jdk.management",
+            "jdk.management.agent",
+            "jdk.management.jfr",
+            "jdk.naming.dns",
+            "jdk.naming.rmi",
+            "jdk.net",
+            "jdk.nio.mapmode",
+            "jdk.sctp",
+            "jdk.security.auth",
+            "jdk.security.jgss",
+            "jdk.xml.dom",
+            "jdk.zipfs"
+    );
+}

src/main/java/de/jjohannes/gradle/moduledependencies/JavaModuleDependenciesPlugin.java

@@ -81,7 +81,12 @@ private void findAndReadModuleInfo(ModuleInfo.Directive moduleDirective, SourceS
     }
 
     private void declareDependency(String moduleName, Project project, Configuration configuration, JavaModuleDependenciesExtension javaModuleDependenciesExtension) {
-        String ownGroup = project.getGroup().toString();
+        if (JDKInfo.MODULES.contains(moduleName)) {
+            // The module is part of the JDK, no dependency required
+            return;
+        }
+
+        String ownModuleNamesPrefix = javaModuleDependenciesExtension.getOwnModuleNamesPrefix().forUseAtConfigurationTime().get();
         String ga = javaModuleDependenciesExtension.ga(moduleName);
         String projectName =  moduleName.startsWith(ownModuleNamesPrefix + ".") ? moduleName.substring(ownModuleNamesPrefix.length() + 1) : null;