com.qatickets.web.common.SessionParamArgumentResolver.java Source code

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Here is the source code for com.qatickets.web.common.SessionParamArgumentResolver.java

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/*
The MIT License (MIT)
    
Copyright (c) 2015 QAXML Pty Ltd
    
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
    
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
    
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
package com.qatickets.web.common;

import java.lang.annotation.Annotation;
import java.util.HashSet;
import java.util.Set;

import javax.inject.Inject;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.math.NumberUtils;
import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import org.springframework.core.MethodParameter;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.ModelAndViewContainer;

import com.qatickets.service.TicketService;
import com.qatickets.web.Attr;

@Component
public class SessionParamArgumentResolver implements HandlerMethodArgumentResolver {

    @Inject
    private TicketService ticketService;

    private static final String HTML5_DATE_PATTERN = "yyyy-MM-dd";
    private static final DateTimeFormatter HTML5_DATE_PARSER = DateTimeFormat.forPattern(HTML5_DATE_PATTERN);

    public static final String UI_DATE_FORMAT = "EEEE, dd MMM yyyy";
    private static final DateTimeFormatter UI_DATE_PARSER = DateTimeFormat.forPattern(UI_DATE_FORMAT);

    @SuppressWarnings({ "rawtypes", "serial" })
    private static final Set<Class> supported = new HashSet<Class>() {
        {
            add(SessionUser.class);
            add(ParamTicket.class);
            add(HTML5Date.class);
            add(Checkbox.class);
            add(IntParam.class);
        }
    };

    @SuppressWarnings("rawtypes")
    @Override
    public boolean supportsParameter(MethodParameter parameter) {

        final Annotation[] paramAnns = parameter.getParameterAnnotations();

        for (final Annotation paramAnn : paramAnns) {

            for (Class c : supported) {
                if (c.isInstance(paramAnn)) {
                    return true;
                }
            }
        }

        return false;

    }

    @Override
    public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
            NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {

        Annotation[] paramAnns = parameter.getParameterAnnotations();

        HttpServletRequest req = (HttpServletRequest) webRequest.getNativeRequest();
        HttpSession session = req.getSession(false);

        Object result = null;

        // parameter
        if (session != null) {
            for (Annotation paramAnn : paramAnns) {

                if (SessionUser.class.isInstance(paramAnn)) {
                    result = session.getAttribute(UserHelper.USER);
                } else if (ParamTicket.class.isInstance(paramAnn)) {

                    int ticketId = 0;

                    if (NumberUtils.isDigits(req.getParameter(Attr.PARAM_TICKET_ID))) {
                        ticketId = Integer.parseInt(req.getParameter(Attr.PARAM_TICKET_ID));
                    }

                    result = this.ticketService.findById(ticketId);

                } else if (HTML5Date.class.isInstance(paramAnn)) {
                    HTML5Date html5Date = (HTML5Date) paramAnn;
                    String html5DateParameterName = null;
                    if (StringUtils.isNotBlank(html5Date.value())) {
                        html5DateParameterName = html5Date.value();
                    } else {
                        html5DateParameterName = parameter.getParameterName();
                    }
                    String date = req.getParameter(html5DateParameterName);
                    if (StringUtils.isNotBlank(date)) {
                        if (date.contains(",")) {
                            // UI date
                            result = DateTime.parse(date, UI_DATE_PARSER).toDate();
                        } else {
                            // native picker date
                            result = DateTime.parse(date, HTML5_DATE_PARSER).toDate();
                        }
                    }

                } else if (Checkbox.class.isInstance(paramAnn)) {
                    Checkbox checkbox = (Checkbox) paramAnn;
                    String checkboxParameterName = null;
                    if (StringUtils.isNotBlank(checkbox.value())) {
                        checkboxParameterName = checkbox.value();
                    } else {
                        checkboxParameterName = parameter.getParameterName();
                    }
                    String checkboxValue = req.getParameter(checkboxParameterName);
                    if (StringUtils.isNotBlank(checkboxValue)) {
                        result = Boolean.TRUE;
                    } else {
                        result = Boolean.FALSE;
                    }
                } else if (IntParam.class.isInstance(paramAnn)) {
                    IntParam intParam = (IntParam) paramAnn;
                    String parameterName = null;
                    if (StringUtils.isNotBlank(intParam.value())) {
                        parameterName = intParam.value();
                    } else {
                        parameterName = parameter.getParameterName();
                    }
                    String value = req.getParameter(parameterName);
                    if (value != null && NumberUtils.isDigits(value)) {
                        result = Integer.parseInt(value);
                    } else {
                        result = 0;
                    }
                }

            }
        }

        return result;

    }

}