/*
* =============================================================================
*
* Copyright (c) 2011-2014, The THYMELEAF team (http://www.thymeleaf.org)
*
* 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.thymeleaf.standard;
import java.text.MessageFormat;
import java.util.Locale;
import java.util.Properties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.thymeleaf.Arguments;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.cache.ICache;
import org.thymeleaf.cache.ICacheManager;
import org.thymeleaf.resourceresolver.IResourceResolver;
import org.thymeleaf.util.MessageResolutionUtils;
import org.thymeleaf.util.Validate;
/**
*
* @author Daniel Fernández
*
* @since 1.0
*
*/
public final class StandardMessageResolutionUtils {
private static final Logger logger = LoggerFactory.getLogger(StandardMessageResolutionUtils.class);
private static final Object[] EMPTY_MESSAGE_PARAMETERS = new Object[0];
private static final String THYMELEAF_MARKUP_SUFFIX = ".thtml";
private static final String XML_SUFFIX = ".xml";
private static final String XHTML_SUFFIX = ".xhtml";
private static final String HTML_SUFFIX = ".html";
private static final String HTM_SUFFIX = ".htm";
private static final String JSP_SUFFIX = ".jsp";
private static final String TEMPLATE_CACHE_PREFIX = "{template_msg}";
public static String resolveMessageForTemplate(
final Arguments arguments, final String key, final Object[] messageParameters,
final Properties defaultMessages) {
Validate.notNull(arguments, "Arguments cannot be null");
Validate.notNull(arguments.getContext().getLocale(), "Locale in context cannot be null");
Validate.notNull(key, "Message key cannot be null");
final Locale locale = arguments.getContext().getLocale();
final String templateName = arguments.getTemplateResolution().getTemplateName();
final String cacheKey = TEMPLATE_CACHE_PREFIX + templateName + '_' + locale.toString();
Properties properties = null;
ICache<String,Properties> messagesCache = null;
final ICacheManager cacheManager = arguments.getConfiguration().getCacheManager();
if (cacheManager != null) {
messagesCache = cacheManager.getMessageCache();
if (messagesCache != null) {
properties = messagesCache.get(cacheKey);
}
}
if (properties == null) {
if (logger.isDebugEnabled()) {
logger.debug("[THYMELEAF][{}] Resolving uncached messages for template \"{}\" and locale \"{}\". Messages will be retrieved from files", new Object[] {TemplateEngine.threadIndex(), templateName, locale});
}
properties = loadMessagesForTemplate(arguments, defaultMessages);
if (messagesCache != null) {
messagesCache.put(cacheKey, properties);
}
} else {
if (logger.isTraceEnabled()) {
logger.trace("[THYMELEAF][{}] Resolving messages for template \"{}\" and locale \"{}\". Messages are CACHED", new Object[] {TemplateEngine.threadIndex(), templateName, locale});
}
}
final String messageValue = properties.getProperty(key);
if (messageValue == null) {
return null;
}
final MessageFormat messageFormat = new MessageFormat(messageValue, locale);
return messageFormat.format((messageParameters != null? messageParameters : EMPTY_MESSAGE_PARAMETERS));
}
private static Properties loadMessagesForTemplate(
final Arguments arguments, final Properties defaultMessages) {
Validate.notNull(arguments, "Arguments cannot be null");
Validate.notNull(arguments.getContext().getLocale(), "Locale in context cannot be null");
final String resourceName = arguments.getTemplateResolution().getResourceName();
final IResourceResolver resourceResolver = arguments.getTemplateResolution().getResourceResolver();
final Locale locale = arguments.getContext().getLocale();
final String templateBaseName = getTemplateFileNameBase(resourceName);
return MessageResolutionUtils.loadCombinedMessagesFilesFromBaseName(
arguments, resourceResolver, templateBaseName, locale, defaultMessages);
}
private static String getTemplateFileNameBase(final String templateFileName) {
if (templateFileName.endsWith(THYMELEAF_MARKUP_SUFFIX)) {
return templateFileName.substring(0, templateFileName.length() - THYMELEAF_MARKUP_SUFFIX.length());
}
if (templateFileName.endsWith(HTML_SUFFIX)) {
return templateFileName.substring(0, templateFileName.length() - HTML_SUFFIX.length());
}
if (templateFileName.endsWith(XHTML_SUFFIX)) {
return templateFileName.substring(0, templateFileName.length() - XHTML_SUFFIX.length());
}
if (templateFileName.endsWith(HTM_SUFFIX)) {
return templateFileName.substring(0, templateFileName.length() - HTM_SUFFIX.length());
}
if (templateFileName.endsWith(XML_SUFFIX)) {
return templateFileName.substring(0, templateFileName.length() - XML_SUFFIX.length());
}
if (templateFileName.endsWith(JSP_SUFFIX)) {
return templateFileName.substring(0, templateFileName.length() - JSP_SUFFIX.length());
}
return templateFileName;
}
private StandardMessageResolutionUtils() {
super();
}
}