Create java module file type

GitOrigin-RevId: 57870035dccbd5d35c331a4ddfc3d088edcf8aba

java/java-frontback-psi-api/resources/messages/JavaPsiBundle.properties

@@ -166,7 +166,9 @@ expected.with='with' expected
 expected.pattern=Pattern expected
 filetype.class.description=Java class
 filetype.class.display.name=Java class
+filetype.java.module.display.name=Java module
 filetype.java.description=Java
+filetype.java.module.description=Java module
 filetype.jshell.description=JShell snippet
 finally.without.try='finally' without 'try'
 import.statement.identifier.or.asterisk.expected.=Identifier or '*' expected

java/java-frontback-psi-impl/src/com/intellij/ide/highlighter/JavaModuleFileType.java

@@ -0,0 +1,46 @@
+// Copyright 2000-2023 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package com.intellij.ide.highlighter;
+
+import com.intellij.core.JavaPsiBundle;
+import com.intellij.lang.java.JavaLanguage;
+import com.intellij.openapi.fileTypes.LanguageFileType;
+import com.intellij.ui.IconManager;
+import com.intellij.ui.PlatformIcons;
+import org.jetbrains.annotations.Nls;
+import org.jetbrains.annotations.NotNull;
+
+import javax.swing.*;
+
+public final class JavaModuleFileType extends LanguageFileType {
+  public static final JavaModuleFileType INSTANCE = new JavaModuleFileType();
+
+  private JavaModuleFileType() {
+    super(JavaLanguage.INSTANCE, true);
+  }
+
+  @Override
+  public @NotNull String getName() {
+    return "Java module";
+  }
+
+  @Override
+  public @NotNull String getDescription() {
+    return JavaPsiBundle.message("filetype.java.module.description");
+  }
+
+  @Override
+  public @NotNull String getDefaultExtension() {
+    return JavaFileType.DEFAULT_EXTENSION;
+  }
+
+  @Nls
+  @Override
+  public @NotNull String getDisplayName() {
+    return JavaPsiBundle.message("filetype.java.module.display.name");
+  }
+
+  @Override
+  public Icon getIcon() {
+    return IconManager.getInstance().getPlatformIcon(PlatformIcons.JavaFileType);
+  }
+}

java/java-impl/src/META-INF/JavaPlugin.xml

@@ -1407,6 +1407,7 @@
     <lookup.actionProvider implementation="com.intellij.codeInsight.completion.ExcludeLoggerFromCompletionLookupActionProvider" id="loggerExcludeFromCompletion"/>
     <lookup.actionProvider implementation="com.intellij.codeInsight.completion.ImportStaticLookupActionProvider" id="importStatic"/>
     <fileType extensions="java" hashBangs="java" name="JAVA" language="JAVA" fieldName="INSTANCE" implementationClass="com.intellij.ide.highlighter.JavaFileType"/>
+    <fileType fileNames="module-info.java" name="Java module" fieldName="INSTANCE" implementationClass="com.intellij.ide.highlighter.JavaModuleFileType"/>
     <fileType extensions="class" name="CLASS" fieldName="INSTANCE" implementationClass="com.intellij.ide.highlighter.JavaClassFileType"/>
     <fileType extensions="snippet" name="JSHELL" language="JShellLanguage" fieldName="INSTANCE" implementationClass="com.intellij.ide.highlighter.JShellFileType"/>
     <customPropertyScopeProvider implementation="com.intellij.psi.impl.search.SimpleAccessorScopeProvider"/>