Java tutorial
/** * Copyright 2013 - 2017 WaveMaker, 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 com.wavemaker.commons.i18n; import org.springframework.context.support.ReloadableResourceBundleMessageSource; import org.springframework.core.io.Resource; import org.springframework.core.io.support.PathMatchingResourcePatternResolver; import java.io.IOException; import java.util.Properties; /** * Created by saddhamp on 23/3/16. */ public class MultipleReloadableResourceBundleMessageSource extends ReloadableResourceBundleMessageSource { private static final String PROPERTIES_SUFFIX = ".properties"; private static final String XML_SUFFIX = ".xml"; private PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(); @Override protected PropertiesHolder refreshProperties(String filename, PropertiesHolder propHolder) { if (filename.startsWith(PathMatchingResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX)) { return refreshClassPathProperties(filename, propHolder); } else { return super.refreshProperties(filename, propHolder); } } private PropertiesHolder refreshClassPathProperties(String filename, PropertiesHolder propHolder) { Properties properties = new Properties(); long lastModified = -1; try { Resource[] resources = null; Resource[] propertiesResources = resolver.getResources(filename + PROPERTIES_SUFFIX); Resource[] xmlResources = resolver.getResources(filename + XML_SUFFIX); resources = getMergedResources(propertiesResources, xmlResources); if (resources != null && resources.length > 0) { String sourcePath = null; PropertiesHolder holder = null; for (Resource resource : resources) { sourcePath = resource.getURI().toString().replace(PROPERTIES_SUFFIX, ""); holder = super.refreshProperties(sourcePath, propHolder); properties.putAll(holder.getProperties()); if (lastModified < resource.lastModified()) lastModified = resource.lastModified(); } } } catch (IOException ex) { if (logger.isDebugEnabled()) { logger.debug(filename + " could not be resolved in the file system", ex); } } return new PropertiesHolder(properties, lastModified); } private Resource[] getMergedResources(Resource[] resources1, Resource[] resources2) { if (resources1 == null && resources2 == null) { return null; } if (resources1 == null) { return resources2; } else if (resources2 == null) { return resources1; } Resource[] resources = new Resource[resources1.length + resources2.length]; int index = 0; int i; for (i = 0; i < resources1.length; i++, index++) { resources[index] = resources1[i]; } for (i = 0; i < resources2.length; i++, index++) { resources[index] = resources2[i]; } return resources; } }