1 /*
   2  * Copyright (c) 2005, 2010, 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  * Copyright (C) 2004-2011
  27  *
  28  * Permission is hereby granted, free of charge, to any person obtaining a copy
  29  * of this software and associated documentation files (the "Software"), to deal
  30  * in the Software without restriction, including without limitation the rights
  31  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  32  * copies of the Software, and to permit persons to whom the Software is
  33  * furnished to do so, subject to the following conditions:
  34  *
  35  * The above copyright notice and this permission notice shall be included in
  36  * all copies or substantial portions of the Software.
  37  *
  38  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  39  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  40  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  41  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  42  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  43  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  44  * THE SOFTWARE.
  45  */
  46 package com.sun.xml.internal.rngom.util;
  47 
  48 import java.text.MessageFormat;
  49 import java.util.MissingResourceException;
  50 import java.util.ResourceBundle;
  51 
  52 /**
  53  * Localizes messages.
  54  */
  55 public class Localizer {
  56     private final Class cls;
  57     private ResourceBundle bundle;
  58     /**
  59      * If non-null, any resources that weren't found in this localizer
  60      * will be delegated to the parent.
  61      */
  62     private final Localizer parent;
  63 
  64     public Localizer(Class cls) {
  65         this(null,cls);
  66     }
  67 
  68     public Localizer(Localizer parent, Class cls) {
  69         this.parent = parent;
  70         this.cls = cls;
  71     }
  72 
  73     private String getString(String key) {
  74         try {
  75             return getBundle().getString(key);
  76         } catch( MissingResourceException e ) {
  77             // delegation
  78             if(parent!=null)
  79                 return parent.getString(key);
  80             else
  81                 throw e;
  82         }
  83     }
  84 
  85     public String message(String key) {
  86         return MessageFormat.format(getString(key), new Object[]{});
  87     }
  88 
  89     public String message(String key, Object arg) {
  90         return MessageFormat.format(getString(key),
  91             new Object[]{arg});
  92     }
  93 
  94     public String message(String key, Object arg1, Object arg2) {
  95         return MessageFormat.format(getString(key), new Object[]{
  96                 arg1, arg2});
  97     }
  98 
  99     public String message(String key, Object[] args) {
 100         return MessageFormat.format(getString(key), args);
 101     }
 102 
 103     private ResourceBundle getBundle() {
 104         if (bundle == null) {
 105             String s = cls.getName();
 106             int i = s.lastIndexOf('.');
 107             if (i > 0)
 108                 s = s.substring(0, i + 1);
 109             else
 110                 s = "";
 111             bundle = ResourceBundle.getBundle(s + "Messages");
 112         }
 113         return bundle;
 114     }
 115 }