Initial checkin of filter to intercept & set the locale

git-svn-id: http://svn.igniterealtime.org/svn/repos/messenger/trunk@1017 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/util/LocaleFilter.java

+/*
+ * $RCSfile$
+ * $Revision$
+ * $Date$
+ *
+ * Copyright (C) 2004-2005 Jive Software. All rights reserved.
+ *
+ * This software is published under the terms of the GNU Public License (GPL),
+ * a copy of which is included in this distribution.
+ */
+
+package org.jivesoftware.util;
+
+import org.jivesoftware.messenger.JiveGlobals;
+
+import javax.servlet.*;
+import javax.servlet.jsp.jstl.core.Config;
+import java.io.IOException;
+
+/**
+ * Sets the locale context-wide.
+ */
+public class LocaleFilter implements Filter {
+
+    private ServletContext context;
+
+    public void init(FilterConfig config) throws ServletException {
+        this.context = config.getServletContext();
+    }
+
+    /**
+     * Ssets the locale context-wide based on a call to {@link JiveGlobals#getLocale()}.
+     */
+    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
+            throws IOException, ServletException
+    {
+        // Note, putting the locale in the application at this point is a little overkill
+        // (ie, every user who hits this filter will do this). Eventually, it might make
+        // sense to just set the locale in the user's session and if that's done we might
+        // want to honor a preference to get the user's locale based on request headers.
+        // For now, this is just a convenient place to set the locale globally.
+        Config.set(context, Config.FMT_LOCALE, JiveGlobals.getLocale());
+
+        // Move along:
+        chain.doFilter(request, response);
+    }
+
+    /** Does nothing */
+    public void destroy() {
+    }
+}