How to avoid encode html entities in input using Antisamy

Question

When i'm using antisamy1.5.3 using parser mode as DOM, all the html entities like   are converted to  .I don't want this conversion. How to avoid such conversion. In antisamy source code i think this conversion has been done at ASXHTMLSerializer.getEntityREf() method. Please help how to avoid this encoding.

Input:

<div class=WordSection1><p class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal><o:p>&nbsp;</o:p></p><p class=MsoNormal>I do have a problem with my product.<o:p></o:p></p></div>

Antisamy output (Cleanresults.getcleanhtml())

<div>
    <p>Hi,</p>&amp;nbsp;<p>I do have a problem with my product.</p></div>

Expected Output:

<div>
        <p>Hi,</p>&nbsp;<p>I do have a problem with my product.</p></div>