/**
* This method is used to perform class queries or provide information to the GUI.
*
* @param courseID can be used by administrator for fast class query
* @param courseName Mandatory Field
* @param location Mandatory Field
* @param term Mandatory Field
* @param department
* @param classType
* @param instructorName
* @return A list of ArrayList, in the ArrayList, each entry stores one query result in the table
* property order. Actual Database operations are delegated to the search class. Empty list
* will be returned if the query is failed.
*/
@Override
public List<ArrayList<String>> queryClass(
int courseID,
String courseName,
String location,
String term,
String department,
String classType,
String instructorName) {
if (location.isEmpty() || courseName.isEmpty() || term.isEmpty()) {
System.err.println("Location, Course Name and Term fields must not be empty.");
return _empty;
}
search = new Search();
try {
return search.searchClasses(
courseID, courseName, location, term, department, classType, instructorName);
} catch (ClassNotFoundException | SQLException e) {
System.err.println("Unable to perform search, please try again.");
return _empty;
}
}
