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JAVA ADVANCED/12. Exercise Functional Programming/P11_ThePartyReservationFilterModule.java

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+import java.util.*;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+
+public class P11_ThePartyReservationFilterModule {
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        List<String> guests = Arrays.stream(scanner.nextLine().split("\\s+"))
+                        .collect(Collectors.toList());
+
+        Predicate<String> predicate;
+
+        List<String> commands = new ArrayList<>();
+
+        String line;
+        while (!"Print".equals(line = scanner.nextLine())) {
+            String[] tokens = line.split(";");
+
+            String command = tokens[0];
+            String filterType = tokens[1];
+            String filterParameters = tokens[2];
+
+            if (command.equals("Add filter")) {
+                commands.add(line);
+            } else if (command.equals("Remove filter")) {
+                String commandToRemove = "Add filter;" + filterType + ";" + filterParameters;
+                commands.removeIf(s -> s.equals(commandToRemove));
+            }
+        }
+
+        for (String command : commands) {
+            String filterType = command.split(";")[1];
+            String filterParameters = command.split(";")[2];
+
+            switch (filterType) {
+                case "Starts with":
+                    predicate = str -> str.startsWith(filterParameters);
+                    break;
+                case "Ends with":
+                    predicate = str -> str.endsWith(filterParameters);
+                    break;
+                case "Length":
+                    predicate = str -> str.length() == Integer.parseInt(filterParameters);
+                    break;
+                default: //Contains
+                    predicate = str -> str.contains(filterParameters);
+                    break;
+            }
+
+            guests.removeIf(predicate);
+        }
+
+        System.out.println(guests.stream().collect(Collectors.joining(" ")).toString().replaceAll("([\\[\\]])", ""));
+    }
+}