# HG changeset patch
# User Jaroslav Tulach <jaroslav.tulach@apidesign.org>
# Date 1357573569 -3600
# Node ID 6506d5132e0314fa9d1704f048199b8f1c9dc92e
# Parent  e440a710bc9721cdf413e93cfacdc01c86ed1774
Object.clone seems to be well supported

diff -r e440a710bc97 -r 6506d5132e03 emul/src/main/java/java/lang/Object.java
--- a/emul/src/main/java/java/lang/Object.java	Thu Jan 03 16:30:09 2013 +0100
+++ b/emul/src/main/java/java/lang/Object.java	Mon Jan 07 16:46:09 2013 +0100
@@ -221,7 +221,28 @@
      *               be cloned.
      * @see java.lang.Cloneable
      */
-    protected native Object clone() throws CloneNotSupportedException;
+    protected Object clone() throws CloneNotSupportedException {
+        Object ret = clone(this);
+        if (ret == null) {
+            throw new CloneNotSupportedException(getClass().getName());
+        }
+        return ret;
+    }
+
+    @JavaScriptBody(args = "self", body = 
+          "\nif (!self.$instOf_java_lang_Cloneable) {"
+        + "\n  return null;"
+        + "\n} else {"
+        + "\n  var clone = self.constructor(true);"
+        + "\n  var props = Object.getOwnPropertyNames(self);"
+        + "\n  for (var i = 0; i < props.length; i++) {"
+        + "\n    var p = props[i];"
+        + "\n    clone[p] = self[p];"
+        + "\n  };"
+        + "\n  return clone;"
+        + "\n}"
+    )
+    private static native Object clone(Object self) throws CloneNotSupportedException;
 
     /**
      * Returns a string representation of the object. In general, the
diff -r e440a710bc97 -r 6506d5132e03 vmtest/src/test/java/org/apidesign/bck2brwsr/tck/CloneTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vmtest/src/test/java/org/apidesign/bck2brwsr/tck/CloneTest.java	Mon Jan 07 16:46:09 2013 +0100
@@ -0,0 +1,76 @@
+/**
+ * Back 2 Browser Bytecode Translator
+ * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. Look for COPYING file in the top folder.
+ * If not, see http://opensource.org/licenses/GPL-2.0.
+ */
+package org.apidesign.bck2brwsr.tck;
+
+import org.apidesign.bck2brwsr.vmtest.Compare;
+import org.apidesign.bck2brwsr.vmtest.VMTest;
+import org.testng.annotations.Factory;
+
+/**
+ *
+ * @author Jaroslav Tulach <jtulach@netbeans.org>
+ */
+public class CloneTest {
+    private int value;
+    
+    @Compare public Object notSupported() {
+        try {
+            return new CloneTest().clone();
+        } catch (CloneNotSupportedException ex) {
+            return ex.getClass().getName() + ":" + ex.getMessage();
+        }
+    }
+
+    @Compare public String sameClass() throws CloneNotSupportedException {
+        return new Clnbl().clone().getClass().getName();
+    }
+
+    @Compare public boolean differentInstance() throws CloneNotSupportedException {
+        Clnbl orig = new Clnbl();
+        return orig == orig.clone();
+    }
+
+    @Compare public int sameReference() throws CloneNotSupportedException {
+        CloneTest self = new CloneTest();
+        Clnbl orig = new Clnbl();
+        self.value = 33;
+        orig.ref = self;
+        return ((Clnbl)orig.clone()).ref.value;
+    }
+
+    @Compare public int sameValue() throws CloneNotSupportedException {
+        Clnbl orig = new Clnbl();
+        orig.value = 10;
+        return ((Clnbl)orig.clone()).value;
+    }
+    
+    @Factory
+    public static Object[] create() {
+        return VMTest.create(CloneTest.class);
+    }
+    
+    public static final class Clnbl implements Cloneable {
+        public CloneTest ref;
+        private int value;
+
+        @Override
+        public Object clone() throws CloneNotSupportedException {
+            return super.clone();
+        }
+    }
+}