move repository metadata validator to dedicated module

"maven-repository-metadata-builder"

maven-bom/pom.xml

@@ -142,6 +142,11 @@ under the License.
         <artifactId>maven-repository-metadata</artifactId>
         <version>${project.version}</version>
       </dependency>
+      <dependency>
+        <groupId>org.apache.maven</groupId>
+        <artifactId>maven-repository-metadata-builder</artifactId>
+        <version>${project.version}</version>
+      </dependency>
       <dependency>
         <groupId>org.apache.maven</groupId>
         <artifactId>maven-resolver-provider</artifactId>

maven-core/pom.xml

@@ -59,6 +59,10 @@ under the License.
       <groupId>org.apache.maven</groupId>
       <artifactId>maven-repository-metadata</artifactId>
     </dependency>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-repository-metadata-builder</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.apache.maven</groupId>
       <artifactId>maven-artifact</artifactId>

maven-repository-metadata-builder/pom.xml

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>org.apache.maven</groupId>
+    <artifactId>maven</artifactId>
+    <version>4.0.0-alpha-8-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>maven-repository-metadata-builder</artifactId>
+
+  <name>Maven Repository Metadata Builder</name>
+  <description>The repository metadata builder</description>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-repository-metadata</artifactId>
+    </dependency>
+    <!-- not needed as this only contains the validators for now 
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-builder-support</artifactId>
+    </dependency>-->
+
+    <dependency>
+      <groupId>javax.inject</groupId>
+      <artifactId>javax.inject</artifactId>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.eclipse.sisu</groupId>
+        <artifactId>sisu-maven-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
+
+</project>

maven-repository-metadata/src/main/java/org/apache/maven/artifact/repository/metadata/validator/DefaultMetadataValidator.java → maven-repository-metadata-builder/src/main/java/org/apache/maven/artifact/repository/metadata/validator/DefaultMetadataValidator.java

@@ -44,9 +44,7 @@ public void validate(Metadata metadata, MetadataProblemCollector problems) {
         final Level level;
         if (!metadata.getPlugins().isEmpty()) {
             level = Level.GROUP_ID;
-        }
-        else if ( metadata.getVersion() != null )
-        {
+        } else if (metadata.getVersion() != null) {
             level = Level.VERSION;
         } else {
             level = Level.ARTIFACT_ID;

maven-repository-metadata/pom.xml

@@ -32,10 +32,6 @@ under the License.
   <description>Per-directory local and remote repository metadata.</description>
 
   <dependencies>
-    <dependency>
-      <groupId>javax.inject</groupId>
-      <artifactId>javax.inject</artifactId>
-    </dependency>
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
       <artifactId>plexus-xml</artifactId>
@@ -110,10 +106,6 @@ under the License.
           </execution>
         </executions>
       </plugin>
-      <plugin>
-        <groupId>org.eclipse.sisu</groupId>
-        <artifactId>sisu-maven-plugin</artifactId>
-      </plugin>
     </plugins>
   </build>
 </project>

maven-resolver-provider/pom.xml

@@ -52,6 +52,10 @@ under the License.
       <groupId>org.apache.maven</groupId>
       <artifactId>maven-repository-metadata</artifactId>
     </dependency>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-repository-metadata-builder</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.apache.maven.resolver</groupId>
       <artifactId>maven-resolver-api</artifactId>

pom.xml

@@ -113,6 +113,7 @@ under the License.
     <module>maven-artifact</module>
     <module>maven-resolver-provider</module>
     <module>maven-repository-metadata</module>
+    <module>maven-repository-metadata-builder</module>
     <module>maven-slf4j-provider</module>
     <module>maven-slf4j-wrapper</module>
     <module>maven-embedder</module>