jetx.ext.springmvc.SpringMvcFunctions.java Source code

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Here is the source code for jetx.ext.springmvc.SpringMvcFunctions.java

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/*
 * Copyright 2002-2012 Zhuo Ying. All rights reserved.
 * Email: yingzhor@gmail.com
 *
 * 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 jetx.ext.springmvc;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import jetbrick.template.JetAnnotations.Functions;
import jetbrick.template.runtime.JetPageContext;
import jetx.ext.internal.ExtendUtils;
import jetx.ext.internal.FunctionUtils;

import org.springframework.context.MessageSource;
import org.springframework.context.NoSuchMessageException;
import org.springframework.ui.context.Theme;
import org.springframework.ui.context.ThemeSource;
import org.springframework.validation.Errors;
import org.springframework.validation.FieldError;
import org.springframework.validation.ObjectError;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import org.springframework.web.servlet.FlashMapManager;
import org.springframework.web.servlet.LocaleResolver;
import org.springframework.web.servlet.ThemeResolver;
import org.springframework.web.servlet.support.RequestContextUtils;

/**
 * SpringMVC
 * 
 * @author ?(yingzhor@gmail.com)
 * @since 1.0.0
 */
@Functions
public final class SpringMvcFunctions {

    private static final List<String> EMPTY_STRING_LIST = Collections.unmodifiableList(new ArrayList<String>());

    /* common
     ------------------------------------------------------------------------------------------------------------------- */

    /**
     * ?Spring ROOT 
     */
    public static WebApplicationContext getWebApplicationContext(JetPageContext ctx) {
        return WebApplicationContextUtils.getWebApplicationContext(ExtendUtils.getServletContext(ctx),
                WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE);
    }

    /**
     * ?MessageSource
     */
    public static MessageSource getMessageSource(JetPageContext ctx) {
        return getWebApplicationContext(ctx);
    }

    /**
     * ??Locale 
     */
    public static Locale getLocale(JetPageContext ctx) {
        HttpServletRequest request = ExtendUtils.getHttpServletRequest(ctx);
        return RequestContextUtils.getLocale(request);
    }

    /**
     * ?LocaleResolver
     */
    public static LocaleResolver getLocaleResolver(JetPageContext ctx) {
        HttpServletRequest request = ExtendUtils.getHttpServletRequest(ctx);
        return RequestContextUtils.getLocaleResolver(request);
    }

    /**
     * ?FlashMapManager
     */
    public static FlashMapManager getFlashMapManager(JetPageContext ctx) {
        HttpServletRequest request = ExtendUtils.getHttpServletRequest(ctx);
        return RequestContextUtils.getFlashMapManager(request);
    }

    /**
     * ?InputFlashMap
     */
    public static Map<String, ?> getInputFlashMap(JetPageContext ctx) {
        HttpServletRequest request = ExtendUtils.getHttpServletRequest(ctx);
        return RequestContextUtils.getInputFlashMap(request);
    }

    /**
     * ?OutputFlashMap
     */
    public static Map<String, ?> getOutputFlashMap(JetPageContext ctx) {
        HttpServletRequest request = ExtendUtils.getHttpServletRequest(ctx);
        return RequestContextUtils.getOutputFlashMap(request);
    }

    /**
     * ?Theme
     */
    public static Theme getTheme(JetPageContext ctx) {
        HttpServletRequest request = ExtendUtils.getHttpServletRequest(ctx);
        return RequestContextUtils.getTheme(request);
    }

    /**
     * ?ThemeResolver
     */
    public static ThemeResolver getThemeResolver(JetPageContext ctx) {
        HttpServletRequest request = ExtendUtils.getHttpServletRequest(ctx);
        return RequestContextUtils.getThemeResolver(request);
    }

    /**
     * ?ThemeSource 
     */
    public static ThemeSource getThemeSource(JetPageContext ctx) {
        HttpServletRequest request = ExtendUtils.getHttpServletRequest(ctx);
        return RequestContextUtils.getThemeSource(request);
    }

    /* validation
     ------------------------------------------------------------------------------------------------------------------- */

    /**
     * ?
     */
    public static boolean hasFieldErrors(JetPageContext ctx, String fieldName) {
        return countFieldErrors(ctx, fieldName) != 0;
    }

    /**
     * ? 
     */
    public static int countFieldErrors(JetPageContext ctx, String fieldName) {
        Errors errors = FunctionUtils.findErrors(ctx.getContext());
        return errors != null ? errors.getFieldErrorCount(fieldName) : 0;
    }

    /**
     * ??
     */
    public static List<String> fieldErrors(JetPageContext ctx, String fieldName) {

        Errors errors = FunctionUtils.findErrors(ctx.getContext());
        if (errors == null) {
            return EMPTY_STRING_LIST;
        }

        List<FieldError> fes = errors.getFieldErrors(fieldName);
        List<String> msgs = new ArrayList<String>(0);

        for (FieldError fe : fes) {
            String[] codes = fe.getCodes();
            String defaultMsg = fe.getDefaultMessage();
            Object[] args = fe.getArguments();
            Locale locale = getLocale(ctx);
            MessageSource ms = getMessageSource(ctx);

            if (codes == null || codes.length == 0 || ms == null) {
                msgs.add(defaultMsg);
            } else {
                String msg = null;
                for (int i = 0; i < codes.length; i++) {
                    try {
                        msg = ms.getMessage(codes[i], args, locale);
                    } catch (NoSuchMessageException e) {
                        // 
                    }
                    if (msg == null) {
                        msg = defaultMsg;
                    }
                }
                msgs.add(msg);
            }
        }
        return Collections.unmodifiableList(msgs);
    }

    /**
     * ?
     */
    public static boolean hasGlobalErrors(JetPageContext ctx) {
        return countGlobalErrors(ctx) != 0;
    }

    /**
     * ? 
     */
    public static int countGlobalErrors(JetPageContext ctx) {
        Errors errors = FunctionUtils.findErrors(ctx.getContext());
        return errors != null ? errors.getGlobalErrorCount() : 0;
    }

    /**
     * ??
     */
    public static List<String> globalErrors(JetPageContext ctx) {

        Errors errors = FunctionUtils.findErrors(ctx.getContext());
        if (errors == null) {
            return EMPTY_STRING_LIST;
        }

        List<ObjectError> oes = errors.getGlobalErrors();
        List<String> msgs = new ArrayList<String>(0);

        for (ObjectError oe : oes) {
            String[] codes = oe.getCodes();
            String defaultMsg = oe.getDefaultMessage();
            Object[] args = oe.getArguments();
            Locale locale = getLocale(ctx);
            MessageSource ms = getMessageSource(ctx);

            if (codes == null || codes.length == 0 || ms == null) {
                msgs.add(defaultMsg);
            } else {
                String msg = null;
                for (int i = 0; i < codes.length; i++) {
                    try {
                        msg = ms.getMessage(codes[i], args, locale);
                    } catch (NoSuchMessageException e) {
                        // 
                    }
                    if (msg == null) {
                        msg = defaultMsg;
                    }
                }
                msgs.add(msg);
            }
        }
        return Collections.unmodifiableList(msgs);
    }

}