Thread.currentThread().setContextClassLoader(cl);
// use the last parameter of the PropertySetMixin constructor
// for your optional attributes if necessary. See the documentation
// of the PropertySetMixin helper for further information.
// Ensure that your attributes are initialized correctly!
m_prophlp = new PropertySetMixin(m_xContext, this,
new Type(com.sun.star.report.meta.XFormulaParser.class), null);
}