refactoring: State

protocol-new/src/main/java/mc/protocol/State.java

@@ -0,0 +1,68 @@
+package mc.protocol;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import mc.protocol.packets.ClientSidePacket;
+import mc.protocol.packets.ServerSidePacket;
+
+import javax.annotation.Nullable;
+import java.util.Collections;
+import java.util.Map;
+
+@RequiredArgsConstructor
+public enum State {
+
+	HANDSHAKING(0,
+			// client side
+			Collections.emptyMap(),
+			// server side
+			Collections.emptyMap()
+	),
+
+	STATUS(1,
+			// client side
+			Collections.emptyMap(),
+			// server side
+			Collections.emptyMap()
+	),
+
+	LOGIN(2,
+			// client side
+			Collections.emptyMap(),
+			// server side
+			Collections.emptyMap()
+	),
+
+	PLAY(3,
+			// client side
+			Collections.emptyMap(),
+			// server side
+			Collections.emptyMap()
+	);
+
+	public static State getById(int id) {
+		// а зачем усложнять?
+		//@formatter:off
+		if      (id == 1) return STATUS;
+		else if (id == 2) return LOGIN;
+		else if (id == 3) return PLAY;
+		else              return HANDSHAKING;
+		//@formatter:on
+	}
+
+	@Getter
+	private final int id;
+
+	private final Map<Integer, Class<? extends ClientSidePacket>> clientSidePackets;
+	private final Map<Class<? extends ServerSidePacket>, Integer> serverSidePackets;
+
+	@Nullable
+	public Class<? extends ClientSidePacket> getClientSidePacketById(int id) {
+		return clientSidePackets == null ? null : clientSidePackets.get(id);
+	}
+
+	@Nullable
+	public Integer getServerSidePacketId(Class<? extends ServerSidePacket> clazz) {
+		return serverSidePackets == null ? null : serverSidePackets.get(clazz);
+	}
+}