[MNG-8084] New model builder and resolver provider

api/maven-api-core/src/main/java/org/apache/maven/api/Packaging.java

@@ -18,6 +18,8 @@
  */
 package org.apache.maven.api;
 
+import java.util.Map;
+
 import org.apache.maven.api.annotations.Experimental;
 import org.apache.maven.api.annotations.Immutable;
 import org.apache.maven.api.annotations.Nonnull;
@@ -55,9 +57,9 @@ default Language language() {
     Type type();
 
     /**
-     * Returns the binding to use specifically for this packaging.
-     * This will be merged to the default packaging definition.
+     * Returns the binding to use specifically for this packaging keyed by lifecycle id.
+     * This will be used instead of the default packaging definition.
      */
     @Nonnull
-    PluginContainer plugins();
+    Map<String, PluginContainer> plugins();
 }

api/maven-api-core/src/main/java/org/apache/maven/api/services/ModelBuilder.java

@@ -0,0 +1,35 @@
+/*
+ * 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.
+ */
+package org.apache.maven.api.services;
+
+import java.util.List;
+
+import org.apache.maven.api.Service;
+import org.apache.maven.api.model.Model;
+
+public interface ModelBuilder extends Service {
+
+    List<String> VALID_MODEL_VERSIONS = List.of("4.0.0", "4.1.0");
+
+    ModelBuilderResult build(ModelBuilderRequest request) throws ModelBuilderException;
+
+    ModelTransformerContextBuilder newTransformerContextBuilder();
+
+    Model buildRawModel(ModelBuilderRequest request);
+}

api/maven-api-core/src/main/java/org/apache/maven/api/services/ModelBuilderException.java

@@ -0,0 +1,80 @@
+/*
+ * 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.
+ */
+package org.apache.maven.api.services;
+
+import java.util.Collections;
+import java.util.List;
+
+import org.apache.maven.api.annotations.Experimental;
+
+/**
+ * The Exception class throw by the {@link ProjectBuilder} service.
+ *
+ * @since 4.0.0
+ */
+@Experimental
+public class ModelBuilderException extends MavenException {
+
+    private final ModelBuilderResult result;
+
+    /**
+     * Creates a new exception from the specified interim result and its associated problems.
+     *
+     * @param result The interim result, may be {@code null}.
+     */
+    public ModelBuilderException(ModelBuilderResult result) {
+        super(result.toString());
+        this.result = result;
+    }
+
+    /**
+     * Gets the interim result of the model building up to the point where it failed.
+     *
+     * @return The interim model building result or {@code null} if not available.
+     */
+    public ModelBuilderResult getResult() {
+        return result;
+    }
+
+    /**
+     * Gets the identifier of the POM whose effective model could not be built. The general format of the identifier is
+     * {@code <groupId>:<artifactId>:<version>} but some of these coordinates may still be unknown at the point the
+     * exception is thrown so this information is merely meant to assist the user.
+     *
+     * @return The identifier of the POM or an empty string if not known, never {@code null}.
+     */
+    public String getModelId() {
+        if (result == null || result.getModelIds().isEmpty()) {
+            return "";
+        }
+        return result.getModelIds().get(0);
+    }
+
+    /**
+     * Gets the problems that caused this exception.
+     *
+     * @return The problems that caused this exception, never {@code null}.
+     */
+    public List<ModelProblem> getProblems() {
+        if (result == null) {
+            return Collections.emptyList();
+        }
+        return Collections.unmodifiableList(result.getProblems());
+    }
+}