This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
That code sort of looks right. Except that I don't think your getTextValue() method should be calling getElementsByTagName; that would cause it to look for "values" elements inside your "values" element. And you will want to use the actual element name ("values") that you are interested in, not something that is just similar to it ("Values").