Add basic support for overriden methods

Author: prokopyl

src/main/java/fr/zcraft/quartzlib/components/commands/CommandEndpoint.java

@@ -4,6 +4,7 @@
 import java.util.ArrayList;
 import java.util.List;
 import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.Nullable;
 
 class CommandEndpoint extends CommandNode {
     private final List<CommandMethod> methods = new ArrayList<>();
@@ -14,7 +15,12 @@ class CommandEndpoint extends CommandNode {
 
     @Override
     void run(Object parentInstance, CommandSender sender, String[] args) throws CommandException {
-        this.methods.get(0).run(parentInstance, sender, args);
+        CommandMethod method = findMatchingMethod(args);
+        method.run(parentInstance, sender, args);
+    }
+
+    @Nullable CommandMethod findMatchingMethod(String[] args) {
+        return this.methods.stream().filter(m -> m.getArguments().length == args.length).findFirst().orElse(null);
     }
 
     void addMethod(CommandMethod method) {

src/main/java/fr/zcraft/quartzlib/components/commands/CommandMethod.java

@@ -10,13 +10,15 @@
 import java.util.ArrayList;
 import java.util.List;
 import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 class CommandMethod {
-    private final Method method;
-    private final String name;
-    private final CommandMethodArgument[] arguments;
+    @NotNull private final Method method;
+    @NotNull private final String name;
+    @NotNull private final CommandMethodArgument[] arguments;
     private final int parameterCount;
-    private CommandMethodSenderArgument senderArgument = null;
+    @Nullable private CommandMethodSenderArgument senderArgument = null;
 
     CommandMethod(Method method, TypeCollection typeCollection) {
         this.method = method;
@@ -37,7 +39,7 @@ class CommandMethod {
         this.parameterCount = parameters.length;
     }
 
-    public String getName() {
+    public @NotNull String getName() {
         return name;
     }
 
@@ -66,11 +68,11 @@ private Object[] parseArguments(CommandSender sender, String[] args)
         return parsed;
     }
 
-    public CommandMethodArgument[] getArguments() {
+    public @NotNull CommandMethodArgument[] getArguments() {
         return arguments;
     }
 
-    public Method getMethod() {
+    public @NotNull Method getMethod() {
         return method;
     }
 }

src/test/java/fr/zcraft/quartzlib/components/commands/CommandGraphTests.java

@@ -160,6 +160,29 @@ public void add() {
         Assert.assertArrayEquals(new boolean[] {true}, ran);
     }
 
+    @Test
+    public void canHandleOverrides() throws CommandException {
+        final String[] argValue = {""};
+
+        class FooCommand {
+            public void add(String arg) {
+                argValue[0] = arg;
+            }
+
+            public void add() {
+                argValue[0] = "bar";
+            }
+        }
+
+        commands.addCommand("foo", FooCommand.class, () -> new FooCommand());
+
+        commands.run(server.addPlayer(), "foo", "add", "pomf");
+        Assert.assertArrayEquals(new String[] {"pomf"}, argValue);
+
+        commands.run(server.addPlayer(), "foo", "add");
+        Assert.assertArrayEquals(new String[] {"bar"}, argValue);
+    }
+
     enum FooEnum {
         FOO, BAR
     }