Java tutorial
/* * Copyright 2016 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package se.omegapoint.facepalm.client.controllers; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import se.omegapoint.facepalm.client.adapters.FriendAdapter; import static java.lang.String.format; import static org.apache.commons.lang3.Validate.notNull; @Controller public class FriendController { private final FriendAdapter friendAdapter; @Autowired public FriendController(final FriendAdapter friendAdapter) { this.friendAdapter = notNull(friendAdapter); } @RequestMapping("/friends") public String friends(final Model model) { model.addAttribute("friends", friendAdapter.friendsForCurrentUser()); return "friends"; } @RequestMapping("/addfriend") public String addFriend(final @RequestParam(name = "friend") String friend) { friendAdapter.addFriend(friend); return format("redirect:/profile?user=%s", friend); } }