From 0fa6e11f57c3bcf2671b1c640d977615e3ac5f2e Mon Sep 17 00:00:00 2001
From: Jente Sondervorst <jentesondervorst@gmail.com>
Date: Fri, 29 May 2026 23:57:57 +0200
Subject: [PATCH] Migrate `com.sun.xml.bind.marshaller.NamespacePrefixMapper`
 to `org.glassfish.jaxb.runtime.marshaller.NamespacePrefixMapper`
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The JAXB RI relocated `NamespacePrefixMapper` as part of the 2.x→3.x
repackaging that accompanies the `javax.xml.bind` → `jakarta.xml.bind`
move. Wire a declarative `ChangeType` into
`JavaxXmlBindMigrationToJakartaXmlBind` so subclasses migrate alongside
the rest of the Jakarta XML Binding 3.0 wave.

Refs: https://github.com/moderneinc/customer-requests/issues/2462 (item 8)
---
 .../META-INF/rewrite/jakarta-ee-9.yml         |  4 ++
 ...xXmlBindMigrationToJakartaXmlBindTest.java | 59 +++++++++++++++++++
 2 files changed, 63 insertions(+)

diff --git a/src/main/resources/META-INF/rewrite/jakarta-ee-9.yml b/src/main/resources/META-INF/rewrite/jakarta-ee-9.yml
index 572ae46478..a0ca274043 100644
--- a/src/main/resources/META-INF/rewrite/jakarta-ee-9.yml
+++ b/src/main/resources/META-INF/rewrite/jakarta-ee-9.yml
@@ -986,6 +986,10 @@ recipeList:
       oldPackageName: javax.xml.bind
       newPackageName: jakarta.xml.bind
       recursive: true
+  - org.openrewrite.java.ChangeType:
+      oldFullyQualifiedTypeName: com.sun.xml.bind.marshaller.NamespacePrefixMapper
+      newFullyQualifiedTypeName: org.glassfish.jaxb.runtime.marshaller.NamespacePrefixMapper
+      ignoreDefinition: true
   - org.openrewrite.maven.UpgradePluginVersion:
       groupId: org.codehaus.mojo
       artifactId: jaxb2-maven-plugin
diff --git a/src/test/java/org/openrewrite/java/migrate/jakarta/JavaxXmlBindMigrationToJakartaXmlBindTest.java b/src/test/java/org/openrewrite/java/migrate/jakarta/JavaxXmlBindMigrationToJakartaXmlBindTest.java
index 8b4223e864..bebb91cf75 100644
--- a/src/test/java/org/openrewrite/java/migrate/jakarta/JavaxXmlBindMigrationToJakartaXmlBindTest.java
+++ b/src/test/java/org/openrewrite/java/migrate/jakarta/JavaxXmlBindMigrationToJakartaXmlBindTest.java
@@ -53,6 +53,24 @@ public void defaults(RecipeSpec spec) {
       public @interface XmlElement {}
       """;
 
+    @Language("java")
+    private static final String SUN_NAMESPACE_PREFIX_MAPPER_STUB = """
+      package com.sun.xml.bind.marshaller;
+      public abstract class NamespacePrefixMapper {
+          public abstract String[] getPreDeclaredNamespaceUris();
+          public abstract String getPreferredPrefix(String namespaceUri, String suggestion, boolean requirePrefix);
+      }
+      """;
+
+    @Language("java")
+    private static final String GLASSFISH_NAMESPACE_PREFIX_MAPPER_STUB = """
+      package org.glassfish.jaxb.runtime.marshaller;
+      public abstract class NamespacePrefixMapper {
+          public abstract String[] getPreDeclaredNamespaceUris();
+          public abstract String getPreferredPrefix(String namespaceUri, String suggestion, boolean requirePrefix);
+      }
+      """;
+
     @DocumentExample
     @Test
     void dontRetainJaxbApiWhenJacksonNotPresent() {
@@ -211,4 +229,45 @@ public class Test {
           )
         );
     }
+
+    @Test
+    void migrateNamespacePrefixMapper() {
+        rewriteRun(
+          spec -> spec.parser(JavaParser.fromJavaVersion()
+            .dependsOn(SUN_NAMESPACE_PREFIX_MAPPER_STUB, GLASSFISH_NAMESPACE_PREFIX_MAPPER_STUB)),
+          //language=java
+          java(
+            """
+              import com.sun.xml.bind.marshaller.NamespacePrefixMapper;
+
+              public class MyPrefixMapper extends NamespacePrefixMapper {
+                  @Override
+                  public String[] getPreDeclaredNamespaceUris() {
+                      return new String[0];
+                  }
+
+                  @Override
+                  public String getPreferredPrefix(String namespaceUri, String suggestion, boolean requirePrefix) {
+                      return suggestion;
+                  }
+              }
+              """,
+            """
+              import org.glassfish.jaxb.runtime.marshaller.NamespacePrefixMapper;
+
+              public class MyPrefixMapper extends NamespacePrefixMapper {
+                  @Override
+                  public String[] getPreDeclaredNamespaceUris() {
+                      return new String[0];
+                  }
+
+                  @Override
+                  public String getPreferredPrefix(String namespaceUri, String suggestion, boolean requirePrefix) {
+                      return suggestion;
+                  }
+              }
+              """
+          )
+        );
+    }
 }