Fix #395

pom.xml

@@ -68,7 +68,7 @@ Some data-binding types overridden as well (ObjectMapper sub-classed as XmlMappe
     <dependency>
       <groupId>org.codehaus.woodstox</groupId>
       <artifactId>stax2-api</artifactId>
-      <version>4.2</version>
+      <version>4.2.1</version>
       <exclusions>
         <exclusion>
 	  <groupId>javax.xml.stream</groupId>
@@ -87,7 +87,7 @@ Some data-binding types overridden as well (ObjectMapper sub-classed as XmlMappe
     <dependency>
       <groupId>com.fasterxml.woodstox</groupId>
       <artifactId>woodstox-core</artifactId>
-      <version>6.2.0</version>
+      <version>6.2.1</version>
       <exclusions>
         <exclusion>
 	  <groupId>javax.xml.stream</groupId>

release-notes/CREDITS-2.x

@@ -60,3 +60,8 @@ Luke Korth ([email protected])
 
 * Reported #366: XML containing xsi:nil is improperly parsed
  (2.10.2)
+
+Martin Vysny (mvysny@github)
+
+* Reported #395: Namespace repairing generates xmlns definitions for xml: prefix (which is implicit)
+ (2.10.5)

release-notes/VERSION-2.x

@@ -6,7 +6,9 @@ Project: jackson-dataformat-xml
 
 2.10.5 (not yet released)
 
--
+#395: Namespace repairing generates xmlns definitions for xml: prefix (which is implicit)
+ (reported by Martin V)
+- Upgrade Woodstox dependency to 6.2.0 (minor fix to namespace binding)
 
 2.10.4 (03-May-2020)
 

src/test/java/com/fasterxml/jackson/dataformat/xml/ser/TestNamespaces.java

@@ -18,26 +18,41 @@ public void setName(String name) {
             this.name = name;
         }
     }
-
+
+    static class Issue395 {
+        @JacksonXmlProperty(isAttribute = true, namespace = "http://www.w3.org/XML/1998/namespace",
+                localName = "lang")
+        public String lang = "en-US";
+    }
+
     /*
     /**********************************************************
     /* Unit tests
     /**********************************************************
      */
-
-    // [Issue-26]: should prefer the "default namespace"
+
+    private final XmlMapper MAPPER = newMapper();
+
+    // [dataformat-xml#26]: should prefer the "default namespace"
     public void testRootNamespace() throws Exception
     {
         Person person = new Person();
         person.setName( "hello" );
 
-        XmlMapper xmlMapper = new XmlMapper();
-        String xml = xmlMapper.writeValueAsString(person);
+        String xml = MAPPER.writeValueAsString(person);
 
         // should use "the default namespace"...
         final String PREFIX = "<person xmlns=";
         if (!xml.startsWith(PREFIX)) {
             fail("Expected XML to begin with '"+PREFIX+"', instead got: "+xml);
         }
     }
+
+    // [dataformat-xml#395]: should not bind standard `xml` namespace to anything
+    public void testXmlNs() throws Exception
+    {
+        String xml = MAPPER.writeValueAsString(new Issue395());
+//        System.err.println("XML: "+xml);
+        assertEquals("<Issue395 xml:lang=\"en-US\"/>", xml.trim());
+    }
 }