added print_field_descending_meters_above_sea_level command

Author: worthant

lab5/src/README.md

@@ -48,7 +48,7 @@
   - [x] make history command
   - [x] make sum_of_meters_above_sea_level command
   - [ ] make print_descending command
-  - [ ] make print_field_descending_meters_above_sea_level command
+  - [x] make print_field_descending_meters_above_sea_level command
 
 #
 

lab5/src/collection/comparators/CityComparatorByMetersAboveSeaLevel.java

@@ -0,0 +1,19 @@
+package collection.comparators;
+
+import collection.City.City;
+
+import java.util.Comparator;
+
+public class CityComparatorByMetersAboveSeaLevel implements Comparator<City> {
+    @Override
+    public int compare(City o1, City o2) {
+        if (o1 == null) {
+            if (o2 == null) {
+                return 0;
+            } else {
+                return -1;
+            }
+        }
+        return o1.getMetersAboveSeaLevel().compareTo(o2.getMetersAboveSeaLevel());
+    }
+}

lab5/src/command/CommandManager.java

@@ -27,7 +27,7 @@ public class CommandManager {
         commandMap.put("history", new History());
         commandMap.put("sum_of_meters_above_sea_level", new SumOfMetersAboveSeaLevel());
 //        commandMap.put("print_descending", new PrintDescending());
-//        commandMap.put("print_field_descending_meters_above_sea_level", new PrintFieldDescendingMetersAboveSeaLevel());
+        commandMap.put("print_field_descending_meters_above_sea_level", new PrintFieldDescendingMetersAboveSeaLevel());
     }
 
     public static HashMap<String, Command> getCommandMap() {

lab5/src/command/commands/PrintFieldAscendingColor.java

@@ -0,0 +1,42 @@
+package command.commands;
+
+import collection.City.City;
+import collection.comparators.CityComparatorByMetersAboveSeaLevel;
+import collectionManagers.CollectionManager;
+import command.Command;
+
+import java.util.Comparator;
+import java.util.TreeSet;
+
+public class PrintFieldDescendingMetersAboveSeaLevel extends Command {
+
+    public PrintFieldDescendingMetersAboveSeaLevel() {
+        super(false);
+    }
+
+    @Override
+    public void execute() {
+        if (checkArgument(getArgument())) {
+            TreeSet<City> cities2 = new TreeSet<>(new CityComparatorByMetersAboveSeaLevel());
+            TreeSet<City> cities = CollectionManager.getCityCollection();
+            for (City city: cities) {
+                cities2.add(city);
+            }
+
+            for (City city2: cities2) {
+                System.out.println(city2.getMetersAboveSeaLevel());
+            }
+        }
+    }
+
+    @Override
+    public boolean checkArgument(Object inputArgument) {
+        if (inputArgument == null)
+            return true;
+        else {
+            System.out.println("Команда print_field_ascending_color не имеет аргументов!");
+            return false;
+        }
+    }
+
+}