Add a failing test for #354

src/main/java/com/fasterxml/jackson/dataformat/xml/deser/XmlTokenStream.java

@@ -14,7 +14,11 @@
  * abstract out all irrelevant details, and to expose equivalent of flat token
  * stream with no "fluff" tokens (comments, processing instructions, mixed
  * content) all of which is just to simplify
- * actual higher-level conversion to JSON tokens
+ * actual higher-level conversion to JSON tokens.
+ *<p>
+ * Beyond initial idea there are also couple of other detours like ability
+ * to "replay" some tokens, add virtual wrappers (ironically to support "unwrapped"
+ * array values), and to unroll "Objects" into String values in some cases.
  */
 public class XmlTokenStream
 {
@@ -146,7 +150,7 @@ protected void setFormatFeatures(int f) {
 
     // DEBUGGING
     /*
-    public int next() throws IOException 
+    public int next() throws XMLStreamException 
     {
         int n = next0();
         switch (n) {
@@ -270,6 +274,10 @@ protected void skipAttributes()
         }
     }
 
+    /**
+     * Helper method called by XML String deserializer to concatenate textual contents
+     * contained in logical "Object": mostly just to skip attribute values.
+     */
     protected String convertToString() throws XMLStreamException
     {
         // only applicable to cases where START_OBJECT was induced by attributes

src/test/java/com/fasterxml/jackson/dataformat/xml/XmlTestBase.java

@@ -104,7 +104,7 @@ public boolean equals(Object o)
             return true;
         }
     }
-    
+
     protected static class StringBean
     {
         public String text;
@@ -118,7 +118,7 @@ public String toString() {
             return "\""+text+"\"";
         }
     }
-    
+
     /**
      * Simple wrapper around String type, usually to test value
      * conversions or wrapping
@@ -131,7 +131,7 @@ public StringWrapper(String value) {
             str = value;
         }
     }
-    
+
     protected static class IntWrapper {
         public int i;
 
@@ -141,7 +141,6 @@ public IntWrapper(int value) {
         }
     }
 
-    // since 2.9.6
     public static class Point {
         public int x, y;
 

src/test/java/com/fasterxml/jackson/dataformat/xml/deser/SimpleStringValuesTest.java

@@ -27,7 +27,7 @@ static class Issue167Bean {
     /**********************************************************
      */
 
-    private final XmlMapper MAPPER = new XmlMapper();
+    private final XmlMapper MAPPER = newMapper();
 
     public void testSimpleStringElement() throws Exception
     {

src/test/java/com/fasterxml/jackson/dataformat/xml/failing/XsiNil354Test.java

@@ -0,0 +1,36 @@
+package com.fasterxml.jackson.dataformat.xml.failing;
+
+import com.fasterxml.jackson.dataformat.xml.XmlMapper;
+import com.fasterxml.jackson.dataformat.xml.XmlTestBase;
+
+public class XsiNil354Test extends XmlTestBase
+{
+    protected static class DoubleWrapper {
+        public Double d;
+
+        public DoubleWrapper() { }
+        public DoubleWrapper(Double value) {
+            d = value;
+        }
+    }
+
+    private final XmlMapper MAPPER = newMapper();
+
+    public void testWithDoubleAsNull() throws Exception
+    {
+        DoubleWrapper bean = MAPPER.readValue(
+                "<DoubleWrapper xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"><d xsi:nil='true'></DoubleWrapper>",
+                DoubleWrapper.class);
+        assertNotNull(bean);
+        assertNull(bean.d);
+    }
+
+    public void testWithDoubleAsNonNull() throws Exception
+    {
+        DoubleWrapper bean = MAPPER.readValue(
+                "<DoubleWrapper xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"><d xsi:nil='false'>0.25</DoubleWrapper>",
+                DoubleWrapper.class);
+        assertNotNull(bean);
+        assertEquals(Double.valueOf(0.25), bean.d);
+    }
+}