idefixcert

StringBuilder buffer = new StringBuilder();
JspWriter jspWriterMock = mock(JspWriter.class);  
Answer<JspWriter> answer = new Answer<JspWriter>() {  
 @Override  
 public JspWriter answer(final InvocationOnMock theInvocation) throws Throwable {  
  Method method = theInvocation.getMethod();  
  Method methodImpl = StringBuilder.class.getMethod(method.getName(), method.getParameterTypes());  
  methodImpl.invoke(buffer, theInvocation.getArguments());  
  return (JspWriter) theInvocation.getMock();  
 }  

idefixcert

public static <T> T deepCopy(T o) throws Exception {  
  ByteArrayOutputStream baos = new ByteArrayOutputStream();  
  new ObjectOutputStream(baos).writeObject(o);  
  ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());  
  return (T) new ObjectInputStream(bais).readObject();  
}