HBX-3234: Improve the Maven hbm2orm Mojo

maven/pom.xml

@@ -189,7 +189,7 @@
               </sources>
             </configuration>
           </execution>
-          <!-- add the examples as test resources -->
+          <!-- add the examples along with the other resources of the functional tests as test resources -->
           <execution>
             <id>add-test-resource</id>
             <phase>generate-test-resources</phase>
@@ -205,6 +205,9 @@
                     <exclude>**/hibernate.properties</exclude>
                   </excludes>
                 </resource>
+                <resource>
+                    <directory>src/functionalTest/resources</directory>
+                </resource>
               </resources>
             </configuration>
           </execution>

maven/src/functionalTest/java/org/hibernate/tool/maven/TransformHbmTestIT.java

@@ -0,0 +1,76 @@
+package org.hibernate.tool.maven;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.io.File;
+import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Objects;
+
+import org.apache.maven.cli.MavenCli;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+public class TransformHbmTestIT {
+
+    public static final String MVN_HOME = "maven.multiModuleProjectDirectory";
+
+    @TempDir
+    private Path projectPath;
+
+    @Test
+    public void testSimpleHbmTransformation() throws Exception {
+    	System.setProperty(MVN_HOME, projectPath.toAbsolutePath().toString());
+        writePomFile();
+        copyHbmFile();
+
+        runTransformHbmToOrm();
+     }
+
+    private void writePomFile() throws Exception {
+    	File pomFile = new File(projectPath.toFile(), "pom.xml");
+    	assertFalse(pomFile.exists());
+        Path pomPath = projectPath.resolve("pom.xml");
+        Files.writeString(pomPath, simplePomContents);
+        assertTrue(pomFile.exists());
+    }
+
+    private void copyHbmFile() throws Exception {
+    	URL originUrl = TransformHbmTestIT.class.getResource("simple.hbm.xml");
+    	assertNotNull(originUrl);
+    	Path originPath = Paths.get(Objects.requireNonNull(originUrl).toURI());
+    	File destinationDir = new File(projectPath.toFile(), "src/main/resources/");
+    	assertTrue(destinationDir.mkdirs());
+    	File destinationFile = new File(destinationDir, "simple.hbm.xml");
+    	assertFalse(destinationFile.exists());
+    	Files.copy(originPath, destinationFile.toPath());
+    	assertTrue(destinationFile.exists());
+    }
+
+    private void runTransformHbmToOrm() {
+    	File destinationDir = new File(projectPath.toFile(), "src/main/resources/");
+    	File ormXmlFile = new File(destinationDir, "simple.mapping.xml");
+    	assertFalse(ormXmlFile.exists());
+        new MavenCli().doMain(
+                new String[]{"org.hibernate.tool:hibernate-tools-maven:7.2.0.CR2:hbm2orm", "generate-sources"},
+                projectPath.toAbsolutePath().toString(),
+                null,
+                null);
+        assertTrue(ormXmlFile.exists());
+    }
+
+    private static final String simplePomContents =
+            """
+                   <project>
+                       <modelVersion>4.0.0</modelVersion>
+                       <groupId>org.hibernate.tool.maven.test</groupId>
+                       <artifactId>simplest</artifactId>
+                       <version>0.1-SNAPSHOT</version>
+                   </project>
+                   """;
+
+}

maven/src/functionalTest/resources/org/hibernate/tool/maven/simple.hbm.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Copyright 2004 - 2025 Red Hat, Inc.
+  ~
+  ~ Licensed 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.
+  -->
+<!DOCTYPE hibernate-mapping PUBLIC
+	"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
+	"https://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
+<hibernate-mapping>
+
+	<class name="org.bar.Foo">
+		<id name="id" type="long">
+			<generator class="assigned"/>
+		</id>
+		<property name="name" type="string"/>
+	</class>
+
+</hibernate-mapping>