UtilityClass.cls

public class UtilityClass {
    public static List<sObject> queryObjects(String theObject, List<String> theFields, List<String> theFilters, String sortField, String sortOrder) {
        String theQuery = 'SELECT ' + string.join(theFields, ',');
        theQuery += ' FROM ' + theObject;
        boolean firstFilter = true;
        for(String filter : theFilters) {
            String clauseToUse = (firstFilter) ? ' WHERE ' : ' AND ';
            filter = filter.trim();
            filter = filter.replaceAll('(\\s+)', ' '); // removing white spaces
            theQuery += clauseToUse + filter;
        }
        if(!String.isEmpty(sortField)) {
            theQuery += ' ORDER BY ' + sortField;
            if(!String.isEmpty(sortOrder)) {
                theQuery += ' ' + sortOrder;
            }
        }
        
        String queryResult = string.escapeSingleQuotes(theQuery);
        return Database.query(queryResult);
    }
}