1 /*
   2  * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.imageio.plugins.common;
  27 
  28 import java.io.InputStream;
  29 import java.util.PropertyResourceBundle;
  30 import java.net.URL;
  31 
  32 /**
  33  * Class to simplify use of internationalization message strings.
  34  * Property files are constructed in terms of content as for JAI with
  35  * one "key=value" pair per line. All such files however have the same
  36  * name "properties". The resource extractor resolves the extraction of
  37  * the file from the jar as the package name is included automatically.
  38  *
  39  * <p>Extenders need only provide a static method
  40  * <code>getString(String)</code> which calls the static method in this
  41  * class with the name of the invoking class and returns a
  42  * <code>String</code>.
  43  */
  44 public class I18NImpl {
  45     /**
  46      * Returns the message string with the specified key from the
  47      * "properties" file in the package containing the class with
  48      * the specified name.
  49      */
  50     protected static final String getString(String className, String resource_name, String key) {
  51         PropertyResourceBundle bundle = null;
  52         try {
  53             InputStream stream =
  54                 Class.forName(className).getResourceAsStream(resource_name);
  55             bundle = new PropertyResourceBundle(stream);
  56         } catch(Throwable e) {
  57             throw new RuntimeException(e); // Chain the exception.
  58         }
  59 
  60         return (String)bundle.handleGetObject(key);
  61     }
  62 }