// initial methods
public void parseFrom(List fromList) throws QueryParsingException {
if (fromList == null || fromList.size() == 0) {
throw new QueryParsingException("Invalid query: Source of the query is not specified.");
}
for (int i = 0, n = fromList.size(); i < n; i++) {
String from = (String) fromList.get(i);
parseSource(from);
}
}
public void parseFrom(String from) throws QueryParsingException {
parseSource(from);
}