sortFields = new SortField[2];
sortFields[0] = new SortField("a", Boolean.FALSE);
sortFields[1] = new SortField("b", Boolean.TRUE);
comparator = new WrappedBeanComparator(sortFields);
testWrapers = new JavaBeanWrapper[testData.length];
for(int i = 0; i < testData.length; i++) {
testWrapers[i] = w(testData[i]);
}