Fix [Issue#57] for 1.9.10

release-notes/VERSION

diff --git a/release-notes/VERSION b/release-notes/VERSION
index 7a7a648..0e1de69 100644
--- a/release-notes/VERSION
+++ b/release-notes/VERSION
@@ -7,7 +7,8 @@
   Another patch release for 1.9.
 
 Fixes:
-  * [JACKSON-855] add StackOverflowError as root cause
+  * [JACKSON-855]: add StackOverflowError as root cause
+  * [Issue#57]: Allow serialization of JDK proxy types
 
 ------------------------------------------------------------------------
 === History: ===

src/mapper/java/org/codehaus/jackson/map/util/ClassUtil.java

diff --git a/src/mapper/java/org/codehaus/jackson/map/util/ClassUtil.java b/src/mapper/java/org/codehaus/jackson/map/util/ClassUtil.java
index 7b04299..b2ac0ab 100644
--- a/src/mapper/java/org/codehaus/jackson/map/util/ClassUtil.java
+++ b/src/mapper/java/org/codehaus/jackson/map/util/ClassUtil.java
@@ -150,10 +150,12 @@
      */
     public static boolean isProxyType(Class<?> type)
     {
-        // Then: well-known proxy (etc) classes
+        // As per [Issue#57], should NOT disqualify JDK proxy:
+        /*
         if (Proxy.isProxyClass(type)) {
             return true;
         }
+        */
         String name = type.getName();
         // Hibernate uses proxies heavily as well:
         if (name.startsWith("net.sf.cglib.proxy.")

src/test/org/codehaus/jackson/map/interop/TestJDKProxy.java

diff --git a/src/test/org/codehaus/jackson/map/interop/TestJDKProxy.java b/src/test/org/codehaus/jackson/map/interop/TestJDKProxy.java
new file mode 100644
index 0000000..ffec85f
--- /dev/null
+++ b/src/test/org/codehaus/jackson/map/interop/TestJDKProxy.java
@@ -0,0 +1,70 @@
+package org.codehaus.jackson.map.interop;
+
+import java.lang.reflect.*;
+
+import org.codehaus.jackson.map.*;
+
+// mostly for [Issue#57]
+public class TestJDKProxy extends BaseMapTest
+{
+    final ObjectMapper MAPPER = new ObjectMapper();
+
+    public interface IPlanet {
+        String getName();
+        String setName(String s);
+    }
+
+    // bit silly example; usually wouldn't implement interface (no need to proxy if it did)
+    static class Planet implements IPlanet {
+        private String name;
+
+        public Planet() { }
+        public Planet(String s) { name = s; }
+        
+        public String getName(){return name;}
+        public String setName(String iName) {name = iName;
+            return name;
+        }
+    }    
+    
+    /*
+    /********************************************************
+    /* Test methods
+    /********************************************************
+     */
+    
+    public void testSimple() throws Exception
+    {
+        IPlanet input = getProxy(IPlanet.class, new Planet("Foo"));
+        String json = MAPPER.writeValueAsString(input);
+        assertEquals("{\"name\":\"Foo\"}", json);
+        
+        // and just for good measure
+        Planet output = MAPPER.readValue(json, Planet.class);
+        assertEquals("Foo", output.getName());
+    }
+
+    /*
+    /********************************************************
+    /* Helper methods
+    /********************************************************
+     */
+
+    public static <T> T getProxy(Class<T> type, Object toProxy) {
+        class ProxyUtil implements InvocationHandler {
+            Object obj;
+            public ProxyUtil(Object o) {
+                obj = o;
+            }
+            public Object invoke(Object proxy, Method m, Object[] args) throws Throwable {
+                Object result = null;
+                result = m.invoke(obj, args);
+                return result;
+            }
+        }
+        @SuppressWarnings("unchecked")
+        T proxy = (T) Proxy.newProxyInstance(type.getClassLoader(), new Class[] { type },
+                new ProxyUtil(toProxy));
+        return proxy;
+    }
+}