org.wallride.web.support.PathVariableLocaleResolver.java Source code

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Here is the source code for org.wallride.web.support.PathVariableLocaleResolver.java

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/*
 * Copyright 2014 Tagbangers, Inc.
 *
 * 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 org.wallride.web.support;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.servlet.HandlerMapping;
import org.springframework.web.servlet.LocaleResolver;
import org.wallride.domain.Blog;
import org.wallride.domain.BlogLanguage;
import org.wallride.service.BlogService;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Locale;
import java.util.Map;

public class PathVariableLocaleResolver implements LocaleResolver {

    private BlogService blogService;

    private static Logger logger = LoggerFactory.getLogger(PathVariableLocaleResolver.class);

    public void setBlogService(BlogService blogService) {
        this.blogService = blogService;
    }

    @Override
    public Locale resolveLocale(HttpServletRequest request) {
        Blog blog = blogService.getBlogById(Blog.DEFAULT_ID);
        String defaultLanguage = (blog != null) ? blog.getDefaultLanguage() : null;

        Map<String, Object> pathVariables = (Map<String, Object>) request
                .getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
        String currentLanguage = (String) pathVariables.get("language");
        if (currentLanguage == null) {
            currentLanguage = defaultLanguage;
        } else {
            boolean correct = false;
            if (blog != null) {
                for (BlogLanguage blogLanguage : blog.getLanguages()) {
                    if (blogLanguage.getLanguage().equals(currentLanguage)) {
                        correct = true;
                        break;
                    }
                }
            }
            if (!correct) {
                currentLanguage = defaultLanguage;
            }
        }

        return (currentLanguage != null) ? Locale.forLanguageTag(currentLanguage) : request.getLocale();
    }

    @Override
    public void setLocale(HttpServletRequest request, HttpServletResponse response, Locale locale) {
        throw new UnsupportedOperationException(
                "Cannot change fixed locale - use a different locale resolution strategy");
    }
}