Add test case for Root class name in JDOM writer

Co-authored-by: slachiewicz <6705942+slachiewicz@users.noreply.github.com>

Author: Copilot

modello-plugins/modello-plugin-jdom/src/test/java/org/codehaus/modello/plugin/jdom/RootClassnameJDOMGeneratorTest.java

@@ -0,0 +1,56 @@
+package org.codehaus.modello.plugin.jdom;
+
+/*
+ * 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.
+ */
+
+import java.util.Map;
+
+import org.codehaus.modello.AbstractModelloJavaGeneratorTest;
+import org.codehaus.modello.core.ModelloCore;
+import org.codehaus.modello.model.Model;
+
+/**
+ * Test for issue where "Root" cannot be used as a class name in JDOM writer.
+ * The generated code would have a variable name conflict between the method parameter
+ * and a local variable both named "root".
+ *
+ * @author Copilot
+ */
+public class RootClassnameJDOMGeneratorTest extends AbstractModelloJavaGeneratorTest {
+    public RootClassnameJDOMGeneratorTest() {
+        super("root-classname");
+    }
+
+    public void testJavaGenerator() throws Throwable {
+        ModelloCore modello = (ModelloCore) lookup(ModelloCore.ROLE);
+
+        Model model = modello.loadModel(getXmlResourceReader("/root-classname.mdo"));
+
+        Map<String, Object> parameters = getModelloParameters("1.0.0");
+
+        modello.generate(model, "java", parameters);
+        modello.generate(model, "jdom-writer", parameters);
+
+        addDependency("org.jdom", "jdom");
+        compileGeneratedSources();
+
+        // If the code compiles successfully, the test passes
+        // The compilation would fail if there was a variable name conflict
+    }
+}

modello-test/src/main/resources/root-classname.mdo

@@ -0,0 +1,56 @@
+<?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.
+  -->
+
+<model xmlns="http://codehaus-plexus.github.io/MODELLO/2.0.0"
+       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:schemaLocation="http://codehaus-plexus.github.io/MODELLO/2.0.0 https://codehaus-plexus.github.io/modello/xsd/modello-2.0.0.xsd"
+       xml.namespace="http://codehaus-plexus.github.io/ROOT-CLASSNAME/1.0.0">
+  <id>root-classname</id>
+  <name>RootClassname</name>
+  <description>Test model for issue where Root cannot be used as a class name</description>
+  <defaults>
+    <default>
+      <key>package</key>
+      <value>org.codehaus.modello.generator.xml.rootclassname</value>
+    </default>
+  </defaults>
+  <classes>
+    <class rootElement="true" xml.tagName="root">
+      <name>Root</name>
+      <version>1.0.0+</version>
+      <description>Root element class named Root to test variable naming conflict</description>
+      <fields>
+        <field>
+          <name>name</name>
+          <version>1.0.0+</version>
+          <type>String</type>
+          <description>Test field</description>
+        </field>
+        <field>
+          <name>version</name>
+          <version>1.0.0+</version>
+          <type>String</type>
+          <description>Another test field</description>
+        </field>
+      </fields>
+    </class>
+  </classes>
+</model>