git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/trunk@671 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c

2 files changed, 221 insertions, 0 deletions

diff --git a/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/i18n/LanguageDecoratorMapper.java b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/i18n/LanguageDecoratorMapper.java
new file mode 100644
index 0000000..42e6b03
--- /dev/null
+++ b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/i18n/LanguageDecoratorMapper.java
@@ -0,0 +1,125 @@
+package at.gv.egiz.pdfas.web.i18n;

+

+import java.io.File;

+import java.util.Locale;

+import java.util.Properties;

+

+import javax.servlet.http.HttpServletRequest;

+import javax.servlet.http.HttpSession;

+

+import org.apache.log4j.Logger;

+

+import com.opensymphony.module.sitemesh.Config;

+import com.opensymphony.module.sitemesh.Decorator;

+import com.opensymphony.module.sitemesh.DecoratorMapper;

+import com.opensymphony.module.sitemesh.Page;

+import com.opensymphony.module.sitemesh.mapper.AbstractDecoratorMapper;

+import com.opensymphony.module.sitemesh.mapper.DefaultDecorator;

+

+public class LanguageDecoratorMapper extends AbstractDecoratorMapper {

+   

+   

+   private String decoratorParameter = null;

+   

+   private static final Logger LOG = Logger.getLogger(LanguageDecoratorMapper.class);

+

+   public void init(Config config, Properties properties, DecoratorMapper parent) throws InstantiationException {

+      super.init(config, properties, parent);

+   }

+   

+   public static Object getFirstNotNull(Object[] objects) {

+      if (objects == null) {

+         return null;

+      }

+      for (int i = 0; i < objects.length; i++) {

+         if (objects[i] != null) {

+            return objects[i];

+         }

+      }

+      return null;

+   }

+   

+   public static Locale getLocale(HttpServletRequest request, String decoratorParameter) {

+      Locale locale = null;

+      HttpSession session = request.getSession();

+      

+      LOG.trace("Looking for locale in session (ID=" + session.getId() + ").");

+      locale = (Locale) session.getAttribute(LocaleParamFilter.LOCALE_SESSION_KEY);

+      if (locale == null) {

+         LOG.debug("Unable to find locale in session. Trying to create new locale based on Accept-Language header entry.");

+         String acceptLanguage = request.getHeader("Accept-Language");

+         if (acceptLanguage != null) {

+            LOG.trace("Accept-Language header entry: " + acceptLanguage);

+         } else {

+            LOG.trace("No header entry found.");

+         }

+         if (acceptLanguage != null && acceptLanguage.length() >= 2) {

+            locale = new Locale(acceptLanguage.substring(0, 2));

+            LOG.debug("New Locale created: " + locale);

+            LOG.trace("Setting language to " + locale.getDisplayLanguage() + ".");

+            session.setAttribute(LocaleParamFilter.LOCALE_SESSION_KEY, locale);

+         }

+      } else {

+         LOG.trace("Locale found: " + locale);

+      }

+

+      return locale;

+   }

+

+   public Decorator getDecorator(HttpServletRequest request, Page page) {

+      LOG.trace("SiteMesh language resource decorator mapper invoked.");

+      

+      try {

+         Decorator result = null;

+         final Decorator d = super.getDecorator(request, page);

+         Locale locale = getLocale(request, this.decoratorParameter);

+         

+         String path;

+         if (locale != null) {

+            path = modifyPath(d.getPage(), locale.getLanguage());

+         } else {

+            path = d.getPage();

+         }

+

+         File decFile = new File(config.getServletContext().getRealPath(path));

+         

+         LOG.trace("Looking for decorator \"" + path + "\".");

+         if (decFile.isFile()) {

+            result = new DefaultDecorator(d.getName(), path, null) {

+               public String getInitParameter(String paramName) {

+                  return d.getInitParameter(paramName);

+               }

+            };

+         }

+

+         if (result != null) {

+            LOG.trace("Decorator found (\"" + result.getName() + "\", \"" + getFirstNotNull(new Object[] { result.getURIPath(), result.getPage(), "<n/a>"}) + "\").");

+            return result;

+         } else {

+            LOG.trace("No decorator found. Delegating to super class.");

+            result = super.getDecorator(request, page);

+            if (result != null) {

+               LOG.trace("Super class returned decorator (\"" + result.getName() + "\", \"" + getFirstNotNull(new Object[] { result.getURIPath(), result.getPage(), "<n/a>"}) + "\").");

+            } else {

+               LOG.trace("Super class did not return a decorator.");

+            }

+            return result;

+         }

+      } catch (NullPointerException e) {

+         return super.getDecorator(request, page);

+      }

+   }

+

+   private static String modifyPath(String path, String ext) {

+      if (ext == null || ext.length() == 0) {

+         return path;

+      }

+      int dot = path.lastIndexOf('.');

+      if (dot > -1) {

+         return path.substring(0, dot) + '-' + ext + path.substring(dot);

+      } else {

+         return path + '-' + ext;

+      }

+   }

+

+}

diff --git a/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/i18n/LocaleParamFilter.java b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/i18n/LocaleParamFilter.java
new file mode 100644
index 0000000..598b23b
--- /dev/null
+++ b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/i18n/LocaleParamFilter.java
@@ -0,0 +1,96 @@
+package at.gv.egiz.pdfas.web.i18n;

+

+import java.io.IOException;

+import java.util.Locale;

+import java.util.StringTokenizer;

+

+import javax.servlet.Filter;

+import javax.servlet.FilterChain;

+import javax.servlet.FilterConfig;

+import javax.servlet.ServletException;

+import javax.servlet.ServletRequest;

+import javax.servlet.ServletResponse;

+import javax.servlet.http.HttpServletRequest;

+import javax.servlet.http.HttpSession;

+

+import org.apache.commons.lang.LocaleUtils;

+import org.apache.commons.lang.StringUtils;

+import org.apache.log4j.Logger;

+

+public class LocaleParamFilter implements Filter {

+

+   private static final Logger LOG = Logger.getLogger(LocaleParamFilter.class);

+   public static final String LOCALE_SESSION_KEY = "at.gv.egiz.pdfas.web.i18n:currentLocale";

+   public static final String LOCALE_PARAM_KEY = "locale";

+   

+   public void destroy() {

+   }

+

+   public static String normalizeLocaleString(String localeString) {

+      if (localeString == null) {

+         return null;

+      }

+      int jsessionIdIndex = localeString.toLowerCase().indexOf(";jsessionid");

+      if (jsessionIdIndex != -1) {

+         localeString = localeString.substring(0, jsessionIdIndex);

+      }

+      StringTokenizer tokenizer = new StringTokenizer(localeString, "_", false);

+      StringBuffer buffer = new StringBuffer();

+      int index = 0;

+      while (tokenizer.hasMoreTokens()) {

+         String token = tokenizer.nextToken();

+         switch (++index) {

+         case 1:

+            buffer.append(token.toLowerCase());

+            break;

+         case 2:

+            buffer.append(token.toUpperCase());

+            break;

+         default:

+            buffer.append(token);

+            break;

+         }

+         if (tokenizer.hasMoreTokens()) {

+            buffer.append("_");

+         }

+      }

+      return buffer.toString();

+   }

+   

+   public static Locale getLocale(HttpServletRequest request) {

+      Locale locale = null;

+      HttpSession session = request.getSession();

+      

+      LOG.trace("Looking for locale parameter \"" + LOCALE_PARAM_KEY + "\".");

+      String language = request.getParameter(LOCALE_PARAM_KEY);

+      if (!StringUtils.isEmpty(language)) {

+         LOG.debug("Locale parameter \"" + language + "\" found.");

+         String code = normalizeLocaleString(language.trim());

+         LOG.debug("Normalizing locale -> " + code);

+         try {

+            locale = LocaleUtils.toLocale(code);

+            LOG.info("Setting locale flag in session (ID=" + session.getId() + ") to \"" + locale.toString() + "\".");

+            session.setAttribute(LOCALE_SESSION_KEY, locale);

+         } catch (IllegalArgumentException e) {

+            LOG.error("Locale \"" + code + "\" is not valid. Flag will not be set.");

+         }

+      } else {

+         LOG.trace("No locale parameter found.");

+      }

+      

+      return locale;

+   }

+

+   public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

+      HttpServletRequest request = (HttpServletRequest) servletRequest;

+      

+      LOG.trace("LocaleParamFilter invoked.");

+      getLocale(request);

+      

+      filterChain.doFilter(servletRequest, servletResponse);

+   }

+

+   public void init(FilterConfig filterConfig) throws ServletException {

+   }

+

+}