// process condition-expr | condition-list
Element conditionExprElement = UtilXml.firstChildElement(element, "condition-expr");
Element conditionListElement = UtilXml.firstChildElement(element, "condition-list");
Element conditionObjectElement = UtilXml.firstChildElement(element, "condition-object");
if (conditionExprElement != null) {
this.whereCondition = new ConditionExpr(conditionExprElement);
} else if (conditionListElement != null) {
this.whereCondition = new ConditionList(conditionListElement);
} else if (conditionObjectElement != null) {
this.whereCondition = new ConditionObject(conditionObjectElement);
}