protected  void initialize(Class<?> type,
    Object oldInstance,
    Object newInstance,
    Encoder enc) 
{
		Box box = (Box) oldInstance;
		Expression getterExp = new Expression(box.getAlignmentX(), box,
				"getAlignmentX", null);
		try {
			// Calculate the old value of the property
			Object oldVal = getterExp.getValue();
			// Write the getter expression to the encoder
			enc.writeExpression(getterExp);
			// Get the target value that exists in the new environment
			Object targetVal = enc.get(oldVal);
			// Get the current property value in the new environment
			Object newVal = null;
			Box newBox = (Box) newInstance;
			newVal = new Expression(newBox.getAlignmentX(), newBox,
					"AlignmentX", null).getValue();
			/*
			 * Make the target value and current property value equivalent in
			 * the new environment
			 */
			if (null == targetVal) {
				if (null != newVal) {
					// Set to null
					Statement setterStm = new Statement(oldInstance, "setAlignmentX",
							new Object[] { null });
					enc.writeStatement(setterStm);
				}
			} else {
				PersistenceDelegate pd = enc.getPersistenceDelegate(targetVal
						.getClass());
				if (!pd.mutatesTo(targetVal, newVal)) {
					Statement setterStm = new Statement(oldInstance,
							"setAlignmentX", new Object[] { oldVal });
					enc.writeStatement(setterStm);
				}
			}
		} catch (Exception ex) {
			enc.getExceptionListener().exceptionThrown(ex);
		}
}

 protected Expression instantiate(Object oldInstance,
    Encoder enc) 
{
		return new Expression(oldInstance, oldInstance.getClass(),
				"createVerticalBox", null); //$NON-NLS-1$
}