001    /**
002     * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.taglib.util;
016    
017    import com.liferay.portal.kernel.util.AggregateResourceBundle;
018    import com.liferay.portal.kernel.util.JavaConstants;
019    import com.liferay.portal.kernel.util.ResourceBundleUtil;
020    import com.liferay.portal.util.PortalUtil;
021    
022    import java.util.Collections;
023    import java.util.Enumeration;
024    import java.util.Locale;
025    import java.util.MissingResourceException;
026    import java.util.ResourceBundle;
027    
028    import javax.portlet.PortletConfig;
029    
030    import javax.servlet.http.HttpServletRequest;
031    import javax.servlet.jsp.PageContext;
032    
033    /**
034     * @author Adolfo P??rez
035     */
036    public class TagResourceBundleUtil {
037    
038            public static ResourceBundle getResourceBundle(PageContext pageContext) {
039                    ResourceBundle resourceBundle =
040                            (ResourceBundle)pageContext.getAttribute("resourceBundle");
041    
042                    if (resourceBundle != null) {
043                            return resourceBundle;
044                    }
045    
046                    HttpServletRequest request =
047                            (HttpServletRequest)pageContext.getRequest();
048    
049                    Locale locale = PortalUtil.getLocale(request);
050    
051                    return getResourceBundle(pageContext, "content.Language", locale);
052            }
053    
054            public static ResourceBundle getResourceBundle(
055                    PageContext pageContext, String baseName, Locale locale) {
056    
057                    ResourceBundle pageResourceBundle = getPageResourceBundle(
058                            pageContext, baseName, locale);
059    
060                    HttpServletRequest request =
061                            (HttpServletRequest)pageContext.getRequest();
062    
063                    ResourceBundle portletResourceBundle = getPortletResourceBundle(
064                            request, locale);
065    
066                    ResourceBundle portalResourceBundle = PortalUtil.getResourceBundle(
067                            locale);
068    
069                    if (pageResourceBundle.equals(portletResourceBundle)) {
070                            return new AggregateResourceBundle(
071                                    portletResourceBundle, portalResourceBundle);
072                    }
073    
074                    return new AggregateResourceBundle(
075                            pageResourceBundle, portletResourceBundle, portalResourceBundle);
076            }
077    
078            protected static ResourceBundle getPageResourceBundle(
079                    PageContext pageContext, String baseName, Locale locale) {
080    
081                    try {
082                            Object page = pageContext.getPage();
083    
084                            return ResourceBundleUtil.getBundle(
085                                    baseName, locale, page.getClass());
086                    }
087                    catch (MissingResourceException mre) {
088                            return _emptyResourceBundle;
089                    }
090            }
091    
092            protected static ResourceBundle getPortletResourceBundle(
093                    HttpServletRequest request, Locale locale) {
094    
095                    PortletConfig portletConfig = (PortletConfig)request.getAttribute(
096                            JavaConstants.JAVAX_PORTLET_CONFIG);
097    
098                    if (portletConfig != null) {
099                            return portletConfig.getResourceBundle(locale);
100                    }
101    
102                    return _emptyResourceBundle;
103            }
104    
105            private static final ResourceBundle _emptyResourceBundle =
106                    new EmptyResourceBundle();
107    
108            private static class EmptyResourceBundle extends ResourceBundle {
109    
110                    @Override
111                    public boolean containsKey(String key) {
112                            return false;
113                    }
114    
115                    @Override
116                    public Enumeration<String> getKeys() {
117                            return Collections.emptyEnumeration();
118                    }
119    
120                    @Override
121                    protected Object handleGetObject(String key) {
122                            return null;
123                    }
124    
125            }
126    
127    }