--- /dev/null	2015-04-01 16:26:08.626015511 +0200
+++ new/test/lib/testlibrary/jdk/testlibrary/TestProxy.java	2015-04-01 20:06:36.944738909 +0200
@@ -0,0 +1,156 @@
+/*
+ * Copyright (c) 1994, 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.testlibrary;
+
+import java.lang.reflect.*;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Factory for proxy that delegates invocations of its methods
+ * to methods with same signature on target object.
+ * Used to invoke otherwise inaccessible constructors and
+ * instance methods for the purpose of testing.
+ *
+ * @author Peter Levart
+ */
+public class TestProxy {
+
+    /**
+     * Create a proxy instance of type {@code interfaze} and the underlying
+     * delegate object of class with name {@code className} loaded by given
+     * {@code classLoader}. The returned proxy instance delegates all method
+     * invocations to the underlying delegate object so that a matching
+     * method is invoked on the delegate.
+     *
+     * @param interfaze      the interface of proxy to be created
+     * @param className      the class name of the underlying delegate object
+     *                       to be created
+     * @param classLoader    the class loader used to load the class of
+     *                       delegate
+     * @param parameterTypes the parameter types of the constructor to invoke
+     *                       to create new delegate
+     * @param initargs       the arguments passed to delegate constructor
+     * @param <T>            the generic type of proxy object returned
+     * @return newly created proxy that delegates invocations to newly created
+     *         delegate object
+     */
+    public static <T> T newInstance(Class<T> interfaze,
+                                    String className, ClassLoader classLoader,
+                                    Class<?>[] parameterTypes, Object... initargs) {
+        try {
+            Class<?> clazz = Class.forName(className, false, classLoader);
+            Constructor<?> constructor = clazz.getDeclaredConstructor(parameterTypes);
+            constructor.setAccessible(true);
+            Object instance = constructor.newInstance(initargs);
+            @SuppressWarnings("unchecked")
+            T proxy = (T) Proxy.newProxyInstance(interfaze.getClassLoader(),
+                                                 new Class<?>[]{interfaze},
+                                                 new Handler(interfaze, instance));
+            return proxy;
+        } catch (ClassNotFoundException | NoSuchMethodException |
+                 InvocationTargetException | InstantiationException |
+                 IllegalAccessException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private TestProxy() {} // not to be instantiated
+
+    private static class Handler implements InvocationHandler {
+
+        private final Map<Method, Method> methodMap = new HashMap<>();
+        private final Object target;
+
+        Handler(Class<?> interfaze, Object target) {
+            this.target = target;
+            Class<?> clazz = target.getClass();
+            for (Method m : interfaze.getMethods()) {
+                if (Modifier.isStatic(m.getModifiers())) {
+                    continue; // skip static methods
+                }
+                Method tm = findMethod(clazz,
+                                      m.getName(),
+                                      m.getParameterTypes(),
+                                      m.getReturnType());
+                if (tm == null) {
+                    throw new NoSuchMethodError("Can't find method with same signature as: " + m +
+                                                " on target class: " + clazz.getName());
+                }
+                methodMap.put(m, tm);
+            }
+        }
+
+        private static Method findMethod(Class<?> clazz,
+                                         String name,
+                                         Class<?>[] parameterTypes,
+                                         Class<?> returnType) {
+            try {
+                Method m = clazz.getDeclaredMethod(name, parameterTypes);
+                if (!Modifier.isStatic(m.getModifiers())) {
+                    if (m.getReturnType() != returnType) {
+                        throw new NoSuchMethodError("Method: " + m +
+                                                    " has invalid return type. Expecting: " +
+                                                    returnType.getName());
+                    }
+                    m.setAccessible(true);
+                    return m;
+                }
+            } catch (NoSuchMethodException e) {
+            }
+
+            Class<?> superclass = clazz.getSuperclass();
+            if (superclass != null) {
+                Method m = findMethod(superclass, name, parameterTypes, returnType);
+                if (m != null) {
+                    return m;
+                }
+            }
+
+            for (Class<?> interfaze : clazz.getInterfaces()) {
+                Method m = findMethod(interfaze, name, parameterTypes, returnType);
+                if (m != null) {
+                    return m;
+                }
+            }
+
+            return null;
+        }
+
+        @Override
+        public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
+            Method targetMethod = methodMap.get(method);
+            if (targetMethod == null) {
+                throw new NoSuchMethodError("No mapping exists for: " + method);
+            }
+            try {
+                return targetMethod.invoke(target, args);
+            } catch (InvocationTargetException e) {
+                throw e.getTargetException();
+            }
+        }
+    }
+}