cherry.example.web.home.NaviControllerImpl.java Source code

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Here is the source code for cherry.example.web.home.NaviControllerImpl.java

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/*
 * Copyright 2015 agwlvssainokuni
 *
 * 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 cherry.example.web.home;

import static cherry.example.web.util.ModelAndViewBuilder.redirect;
import static org.springframework.web.servlet.mvc.method.annotation.MvcUriComponentsBuilder.fromMethodCall;
import static org.springframework.web.servlet.mvc.method.annotation.MvcUriComponentsBuilder.on;

import java.util.LinkedList;
import java.util.Locale;

import org.apache.commons.collections4.CollectionUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mobile.device.site.SitePreference;
import org.springframework.security.core.Authentication;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.support.SessionStatus;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.util.UriComponents;

import cherry.example.web.Config;

@Controller
public class NaviControllerImpl implements NaviController {

    @Autowired
    private Config config;

    @Override
    public ModelAndView back(NaviForm form, BindingResult binding, Authentication auth, Locale locale,
            SitePreference sitePref, NativeWebRequest request) {
        String uri = restoreHistory(form);
        if (StringUtils.isBlank(uri)) {
            return redirect(redirectToHome()).build();
        }
        return redirect(uri).build();
    }

    @Override
    public ModelAndView save1(String to, String fm, NaviForm form, BindingResult binding, Authentication auth,
            Locale locale, SitePreference sitePref, NativeWebRequest request) {
        saveHistory(form, fm);
        return redirect(to).build();
    }

    @Override
    public ModelAndView save2(String to, String referer, NaviForm form, BindingResult binding, Authentication auth,
            Locale locale, SitePreference sitePref, NativeWebRequest request) {
        saveHistory(form, referer);
        return redirect(to).build();
    }

    @Override
    public ModelAndView clear(NaviForm form, BindingResult binding, Authentication auth, Locale locale,
            SitePreference sitePref, NativeWebRequest request, SessionStatus status) {
        status.setComplete();
        return redirect(redirectToHome()).build();
    }

    private UriComponents redirectToHome() {
        return fromMethodCall(on(HomeController.class).start(null, null, null, null)).build();
    }

    private void saveHistory(NaviForm form, String uri) {
        if (form.getHistory() == null) {
            form.setHistory(new LinkedList<String>());
        }
        form.getHistory().add(uri);
        while (form.getHistory().size() > config.getHistorySize()) {
            form.getHistory().remove(0);
        }
    }

    private String restoreHistory(NaviForm form) {
        if (CollectionUtils.isEmpty(form.getHistory())) {
            return null;
        }
        return form.getHistory().remove(form.getHistory().size() - 1);
    }

}