fixed a serialization form of Result so that it works like a value type.

See http://d.hatena.ne.jp/masanobuimai/20090911#1252684658

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@21663 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/util/XStream2.java

@@ -25,6 +25,8 @@ package hudson.util;
 
 import com.thoughtworks.xstream.XStream;
 import com.thoughtworks.xstream.mapper.Mapper;
+import com.thoughtworks.xstream.mapper.MapperWrapper;
+import com.thoughtworks.xstream.mapper.ImmutableTypesMapper;
 import com.thoughtworks.xstream.converters.Converter;
 import com.thoughtworks.xstream.converters.DataHolder;
 import com.thoughtworks.xstream.converters.MarshallingContext;
@@ -34,6 +36,7 @@ import com.thoughtworks.xstream.io.HierarchicalStreamDriver;
 import com.thoughtworks.xstream.io.HierarchicalStreamReader;
 import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
 import hudson.model.Hudson;
+import hudson.model.Result;
 
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
@@ -82,6 +85,14 @@ public class XStream2 extends XStream {
         registerConverter(new RobustReflectionConverter(getMapper(),new JVM().bestReflectionProvider()),-19);
     }
 
+    @Override
+    protected MapperWrapper wrapMapper(MapperWrapper next) {
+        // list up types that should be marshalled out like a value, without referencial integrity tracking. 
+        ImmutableTypesMapper itm = new ImmutableTypesMapper(next);
+        itm.addImmutableType(Result.class);
+        return itm;
+    }
+
     /**
      * If a class defines a nested {@code ConverterImpl} subclass, use that as a {@link Converter}.
      */

core/src/test/java/hudson/util/XStream2Test.java

@@ -0,0 +1,46 @@
+/*
+ * The MIT License
+ *
+ * Copyright (c) 2004-2009, Sun Microsystems, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package hudson.util;
+
+import junit.framework.TestCase;
+import hudson.model.Result;
+import hudson.model.Run;
+
+/**
+ *
+ * @author Kohsuke Kawaguchi
+ */
+public class XStream2Test extends TestCase {
+    public static final class Foo {
+        Result r1,r2;
+    }
+    public void testMarshalValue() throws Exception {
+        Foo f = new Foo();
+        f.r1 = f.r2 = Result.FAILURE;
+        String xml = Run.XSTREAM.toXML(f);
+        System.out.println(xml);
+        // we should find two "FAILURE"s as they should be written out twice
+        assertEquals(3,xml.split("FAILURE").length);
+    }
+}