HBX-3249: Refactor class MappingExporter and improve tests

  - Collapse HbmXmlOrigin as an inner class into MappingExporter
  - Move 'testHbmXmlOrigin' to 'MappingExporterTest'
  - Remove 'HbmXmlOrigin' and 'HbmXmlOriginTest'

Signed-off-by: Koen Aers <koen.aers@gmail.com>

Author: koentsje

orm/src/main/java/org/hibernate/tool/internal/export/mapping/HbmXmlOrigin.java

@@ -4,6 +4,8 @@
 import jakarta.xml.bind.Marshaller;
 import org.apache.commons.collections4.list.UnmodifiableList;
 import org.hibernate.boot.MetadataSources;
+import org.hibernate.boot.jaxb.Origin;
+import org.hibernate.boot.jaxb.SourceType;
 import org.hibernate.boot.jaxb.hbm.spi.JaxbHbmHibernateMapping;
 import org.hibernate.boot.jaxb.hbm.transform.HbmXmlTransformer;
 import org.hibernate.boot.jaxb.hbm.transform.UnsupportedFeatureHandling;
@@ -21,6 +23,7 @@
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
+import java.io.Serial;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -147,4 +150,21 @@ private void marshall(
         }
     }
 
+    static class  HbmXmlOrigin extends Origin {
+
+        @Serial
+        private static final long serialVersionUID = 1L;
+
+        private final File hbmXmlFile;
+
+        public HbmXmlOrigin(File hbmXmlFile) {
+            super( SourceType.FILE, hbmXmlFile.getAbsolutePath() );
+            this.hbmXmlFile = hbmXmlFile;
+        }
+
+        public File getHbmXmlFile() {
+            return hbmXmlFile;
+        }
+
+    }
 }

orm/src/main/java/org/hibernate/tool/internal/export/mapping/MappingExporter.java

@@ -5,6 +5,7 @@
 import jakarta.xml.bind.Unmarshaller;
 import org.apache.commons.collections4.list.UnmodifiableList;
 import org.hibernate.boot.jaxb.Origin;
+import org.hibernate.boot.jaxb.SourceType;
 import org.hibernate.boot.jaxb.hbm.spi.JaxbHbmHibernateMapping;
 import org.hibernate.boot.jaxb.hbm.transform.UnsupportedFeatureHandling;
 import org.hibernate.boot.jaxb.internal.MappingBinder;
@@ -28,6 +29,7 @@
 import java.util.List;
 import java.util.Objects;
 
+import static org.hibernate.tool.internal.export.mapping.MappingExporter.HbmXmlOrigin;
 import static org.junit.jupiter.api.Assertions.*;
 
 public class MappingExporterTest {
@@ -239,6 +241,16 @@ public void testStart() throws Exception {
         System.out.println(mappingXml);
     }
 
+    @Test
+    public void testHbmXmlOrigin() {
+        File hbmXmlFile = new File(tempDir, "foo.hbm.xml");
+        HbmXmlOrigin hxo = new HbmXmlOrigin(hbmXmlFile);
+        assertNotNull(hxo);
+        assertEquals(hbmXmlFile, hxo.getHbmXmlFile());
+        assertEquals(hbmXmlFile.getAbsolutePath(), hxo.getName());
+        assertEquals(SourceType.FILE, hxo.getType());
+    }
+
     private static final Marshaller DUMMY_MARSHALLER = (Marshaller) Proxy.newProxyInstance(
             MappingExporterTest.class.getClassLoader(),
             new Class<?>[]{Marshaller.class},