add logger to files

src/main/java/seedu/address/logic/commands/QueryDoctorAppointmentCommand.java

@@ -2,6 +2,8 @@
 
 import static java.util.Objects.requireNonNull;
 
+import java.util.logging.Logger;
+
 import seedu.address.commons.util.ToStringBuilder;
 import seedu.address.logic.Messages;
 import seedu.address.model.Model;
@@ -13,6 +15,8 @@
  * (case-insensitive) and displays them as a list with index numbers.
  */
 public class QueryDoctorAppointmentCommand extends Command {
+    private static final Logger logger = Logger.getLogger(QueryDoctorAppointmentCommand.class.getName());
+
     public static final String COMMAND_WORD = "appfordoctor";
 
     public static final String MESSAGE_USAGE = COMMAND_WORD + ": Finds all appointments of doctors whose "
@@ -30,10 +34,12 @@ public QueryDoctorAppointmentCommand(AppointmentContainsDoctorPredicate predicat
     @Override
     public CommandResult execute(Model model) {
         requireNonNull(model);
+        logger.info("Executing QueryDoctorAppointmentCommand");
         model.updateFilteredAppointmentList(predicate);
+        int numberOfAppointments = model.getFilteredAppointmentList().size();
+        logger.info("Number of appointments found: " + numberOfAppointments);
         return new CommandResult(
-                String.format(Messages.MESSAGE_APPOINTMENTS_LISTED_OVERVIEW,
-                        model.getFilteredAppointmentList().size()));
+                String.format(Messages.MESSAGE_APPOINTMENTS_LISTED_OVERVIEW, numberOfAppointments));
     }
 
     @Override

src/main/java/seedu/address/logic/parser/QueryDoctorAppointmentCommandParser.java

@@ -3,6 +3,8 @@
 import static seedu.address.logic.Messages.MESSAGE_INVALID_COMMAND_FORMAT;
 
 import java.util.Arrays;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 
 import seedu.address.logic.commands.QueryDoctorAppointmentCommand;
 import seedu.address.logic.parser.exceptions.ParseException;
@@ -12,19 +14,23 @@
  * Parses input arguments and creates a new QueryDoctorAppointmentCommand object
  */
 public class QueryDoctorAppointmentCommandParser implements Parser<QueryDoctorAppointmentCommand> {
+    private static final Logger logger = Logger.getLogger(QueryDoctorAppointmentCommandParser.class.getName());
+
     /**
      * Parses the given {@code String} of arguments in the context of the QueryDoctorAppointmentCommand
      * and returns a QueryDoctorAppointmentCommand object for execution.
      * @throws ParseException if the user input does not conform the expected format
      */
     public QueryDoctorAppointmentCommand parse(String args) throws ParseException {
+        logger.log(Level.INFO, "Parsing QueryDoctorAppointmentCommand arguments: " + args);
         String trimmedArgs = args.trim();
         if (trimmedArgs.isEmpty()) {
             throw new ParseException(
                     String.format(MESSAGE_INVALID_COMMAND_FORMAT, QueryDoctorAppointmentCommand.MESSAGE_USAGE));
         }
 
         String[] nameKeywords = trimmedArgs.split("\\s+");
+        logger.log(Level.INFO, "Name keywords: " + Arrays.toString(nameKeywords));
 
         return new QueryDoctorAppointmentCommand(new AppointmentContainsDoctorPredicate(Arrays.asList(nameKeywords)));
     }

src/main/java/seedu/address/model/appointment/AppointmentContainsDoctorPredicate.java

@@ -2,6 +2,8 @@
 
 import java.util.List;
 import java.util.function.Predicate;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 
 import seedu.address.commons.util.StringUtil;
 import seedu.address.commons.util.ToStringBuilder;
@@ -10,6 +12,7 @@
  * Represents a Predicate used to test if an Appointment contains specified doctor keywords.
  */
 public class AppointmentContainsDoctorPredicate implements Predicate<Appointment> {
+    private static final Logger logger = Logger.getLogger(AppointmentContainsDoctorPredicate.class.getName());
     private final List<String> keywords;
 
     public AppointmentContainsDoctorPredicate(List<String> keywords) {
@@ -18,8 +21,11 @@ public AppointmentContainsDoctorPredicate(List<String> keywords) {
 
     @Override
     public boolean test(Appointment appointment) {
-        return keywords.stream()
+        logger.log(Level.INFO, "Testing appointment: " + appointment);
+        boolean result = keywords.stream()
                 .anyMatch(keyword -> StringUtil.containsWordIgnoreCase(appointment.getDoctorNric().nric, keyword));
+        logger.log(Level.INFO, "Test result: " + result);
+        return result;
     }
 
     @Override