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<a name="1" href="#1">1</a> <em class="comment">/*</em>
<a name="2" href="#2">2</a> <em class="comment"> * $Header: /cvsroot/struts-menu/navigator/src/java/net/sf/navigator/util/PropertyMessageResources.java,v 1.2 2006/07/09 08:08:10 mraible Exp $</em>
<a name="3" href="#3">3</a> <em class="comment"> * $Revision: 1.2 $</em>
<a name="4" href="#4">4</a> <em class="comment"> * $Date: 2006/07/09 08:08:10 $</em>
<a name="5" href="#5">5</a> <em class="comment"> *</em>
<a name="6" href="#6">6</a> <em class="comment"> * Copyright 1999-2004 The Apache Software Foundation.</em>
<a name="7" href="#7">7</a> <em class="comment"> * </em>
<a name="8" href="#8">8</a> <em class="comment"> * Licensed under the Apache License, Version 2.0 (the "License");</em>
<a name="9" href="#9">9</a> <em class="comment"> * you may not use this file except in compliance with the License.</em>
<a name="10" href="#10">10</a> <em class="comment"> * You may obtain a copy of the License at</em>
<a name="11" href="#11">11</a> <em class="comment"> * </em>
<a name="12" href="#12">12</a> <em class="comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a name="13" href="#13">13</a> <em class="comment"> * </em>
<a name="14" href="#14">14</a> <em class="comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a name="15" href="#15">15</a> <em class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em>
<a name="16" href="#16">16</a> <em class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
<a name="17" href="#17">17</a> <em class="comment"> * See the License for the specific language governing permissions and</em>
<a name="18" href="#18">18</a> <em class="comment"> * limitations under the License.</em>
<a name="19" href="#19">19</a> <em class="comment"> */</em>
<a name="20" href="#20">20</a>
<a name="21" href="#21">21</a> <strong>package</strong> net.sf.navigator.util;
<a name="22" href="#22">22</a>
<a name="23" href="#23">23</a> <strong>import</strong> java.io.IOException;
<a name="24" href="#24">24</a> <strong>import</strong> java.io.InputStream;
<a name="25" href="#25">25</a> <strong>import</strong> java.util.HashMap;
<a name="26" href="#26">26</a> <strong>import</strong> java.util.Iterator;
<a name="27" href="#27">27</a> <strong>import</strong> java.util.Locale;
<a name="28" href="#28">28</a> <strong>import</strong> java.util.Properties;
<a name="29" href="#29">29</a>
<a name="30" href="#30">30</a> <strong>import</strong> org.apache.commons.logging.Log;
<a name="31" href="#31">31</a> <strong>import</strong> org.apache.commons.logging.LogFactory;
<a name="32" href="#32">32</a>
<a name="33" href="#33">33</a> <em>/**</em>
<a name="34" href="#34">34</a> <em> * Concrete subclass of <code>MessageResources</code> that reads message keys</em>
<a name="35" href="#35">35</a> <em> * and corresponding strings from named property resources in the same manner</em>
<a name="36" href="#36">36</a> <em> * that <code>java.util.PropertyResourceBundle</code> does. The</em>
<a name="37" href="#37">37</a> <em> * <code>base</code> property defines the base property resource name, and</em>
<a name="38" href="#38">38</a> <em> * must be specified.</em>
<a name="39" href="#39">39</a> <em> * <p></em>
<a name="40" href="#40">40</a> <em> * <strong>IMPLEMENTATION NOTE</strong> - This class trades memory for</em>
<a name="41" href="#41">41</a> <em> * speed by caching all messages located via generalizing the Locale under</em>
<a name="42" href="#42">42</a> <em> * the original locale as well.</em>
<a name="43" href="#43">43</a> <em> * This results in specific messages being stored in the message cache</em>
<a name="44" href="#44">44</a> <em> * more than once, but improves response time on subsequent requests for</em>
<a name="45" href="#45">45</a> <em> * the same locale + key combination.</em>
<a name="46" href="#46">46</a> <em> *</em>
<a name="47" href="#47">47</a> <em> * @version $Revision: 1.2 $ $Date: 2006/07/09 08:08:10 $</em>
<a name="48" href="#48">48</a> <em> */</em>
<a name="49" href="#49">49</a> <strong>public</strong> <strong>class</strong> <a href="../../../../net/sf/navigator/util/PropertyMessageResources.html">PropertyMessageResources</a> <strong>extends</strong> <a href="../../../../net/sf/navigator/util/MessageResources.html">MessageResources</a> {
<a name="50" href="#50">50</a>
<a name="51" href="#51">51</a>
<a name="52" href="#52">52</a> <em class="comment">// ----------------------------------------------------------- Constructors</em>
<a name="53" href="#53">53</a>
<a name="54" href="#54">54</a>
<a name="55" href="#55">55</a> <em>/**</em>
<a name="56" href="#56">56</a> <em> * Construct a new PropertyMessageResources according to the</em>
<a name="57" href="#57">57</a> <em> * specified parameters.</em>
<a name="58" href="#58">58</a> <em> *</em>
<a name="59" href="#59">59</a> <em> * @param factory The MessageResourcesFactory that created us</em>
<a name="60" href="#60">60</a> <em> * @param config The configuration parameter for this MessageResources</em>
<a name="61" href="#61">61</a> <em> */</em>
<a name="62" href="#62">62</a> <strong>public</strong> <a href="../../../../net/sf/navigator/util/PropertyMessageResources.html">PropertyMessageResources</a>(<a href="../../../../net/sf/navigator/util/MessageResourcesFactory.html">MessageResourcesFactory</a> factory,
<a name="63" href="#63">63</a> String config) {
<a name="64" href="#64">64</a>
<a name="65" href="#65">65</a> <strong>super</strong>(factory, config);
<a name="66" href="#66">66</a> log.trace(<span class="string">"Initializing, config='"</span> + config + <span class="string">"'"</span>);
<a name="67" href="#67">67</a>
<a name="68" href="#68">68</a> }
<a name="69" href="#69">69</a>
<a name="70" href="#70">70</a>
<a name="71" href="#71">71</a> <em>/**</em>
<a name="72" href="#72">72</a> <em> * Construct a new PropertyMessageResources according to the</em>
<a name="73" href="#73">73</a> <em> * specified parameters.</em>
<a name="74" href="#74">74</a> <em> *</em>
<a name="75" href="#75">75</a> <em> * @param factory The MessageResourcesFactory that created us</em>
<a name="76" href="#76">76</a> <em> * @param config The configuration parameter for this MessageResources</em>
<a name="77" href="#77">77</a> <em> * @param returnNull The returnNull property we should initialize with</em>
<a name="78" href="#78">78</a> <em> */</em>
<a name="79" href="#79">79</a> <strong>public</strong> <a href="../../../../net/sf/navigator/util/PropertyMessageResources.html">PropertyMessageResources</a>(<a href="../../../../net/sf/navigator/util/MessageResourcesFactory.html">MessageResourcesFactory</a> factory,
<a name="80" href="#80">80</a> String config, <strong>boolean</strong> returnNull) {
<a name="81" href="#81">81</a>
<a name="82" href="#82">82</a> <strong>super</strong>(factory, config, returnNull);
<a name="83" href="#83">83</a> log.trace(<span class="string">"Initializing, config='"</span> + config +
<a name="84" href="#84">84</a> <span class="string">"', returnNull="</span> + returnNull);
<a name="85" href="#85">85</a>
<a name="86" href="#86">86</a> }
<a name="87" href="#87">87</a>
<a name="88" href="#88">88</a>
<a name="89" href="#89">89</a> <em class="comment">// ------------------------------------------------------------- Properties</em>
<a name="90" href="#90">90</a>
<a name="91" href="#91">91</a>
<a name="92" href="#92">92</a> <em>/**</em>
<a name="93" href="#93">93</a> <em> * The set of locale keys for which we have already loaded messages, keyed</em>
<a name="94" href="#94">94</a> <em> * by the value calculated in <code>localeKey()</code>.</em>
<a name="95" href="#95">95</a> <em> */</em>
<a name="96" href="#96">96</a> <strong>protected</strong> HashMap locales = <strong>new</strong> HashMap();
<a name="97" href="#97">97</a>
<a name="98" href="#98">98</a>
<a name="99" href="#99">99</a> <em>/**</em>
<a name="100" href="#100">100</a> <em> * The <code>Log</code> instance for this class.</em>
<a name="101" href="#101">101</a> <em> */</em>
<a name="102" href="#102">102</a> <strong>protected</strong> <strong>static</strong> <strong>final</strong> Log log =
<a name="103" href="#103">103</a> LogFactory.getLog(PropertyMessageResources.<strong>class</strong>);
<a name="104" href="#104">104</a>
<a name="105" href="#105">105</a>
<a name="106" href="#106">106</a> <em>/**</em>
<a name="107" href="#107">107</a> <em> * The cache of messages we have accumulated over time, keyed by the</em>
<a name="108" href="#108">108</a> <em> * value calculated in <code>messageKey()</code>.</em>
<a name="109" href="#109">109</a> <em> */</em>
<a name="110" href="#110">110</a> <strong>protected</strong> HashMap messages = <strong>new</strong> HashMap();
<a name="111" href="#111">111</a>
<a name="112" href="#112">112</a>
<a name="113" href="#113">113</a> <em class="comment">// --------------------------------------------------------- Public Methods</em>
<a name="114" href="#114">114</a>
<a name="115" href="#115">115</a>
<a name="116" href="#116">116</a> <em>/**</em>
<a name="117" href="#117">117</a> <em> * Returns a text message for the specified key, for the default Locale.</em>
<a name="118" href="#118">118</a> <em> * A null string result will be returned by this method if no relevant</em>
<a name="119" href="#119">119</a> <em> * message resource is found for this key or Locale, if the</em>
<a name="120" href="#120">120</a> <em> * <code>returnNull</code> property is set. Otherwise, an appropriate</em>
<a name="121" href="#121">121</a> <em> * error message will be returned.</em>
<a name="122" href="#122">122</a> <em> * <p></em>
<a name="123" href="#123">123</a> <em> * This method must be implemented by a concrete subclass.</em>
<a name="124" href="#124">124</a> <em> *</em>
<a name="125" href="#125">125</a> <em> * @param locale The requested message Locale, or <code>null</code></em>
<a name="126" href="#126">126</a> <em> * for the system default Locale</em>
<a name="127" href="#127">127</a> <em> * @param key The message key to look up</em>
<a name="128" href="#128">128</a> <em> * @return text message for the specified key and locale</em>
<a name="129" href="#129">129</a> <em> */</em>
<a name="130" href="#130">130</a> <strong>public</strong> String getMessage(Locale locale, String key) {
<a name="131" href="#131">131</a>
<a name="132" href="#132">132</a> <strong>if</strong> (log.isDebugEnabled()) {
<a name="133" href="#133">133</a> log.debug(<span class="string">"getMessage("</span> + locale + <span class="string">","</span> + key + <span class="string">")"</span>);
<a name="134" href="#134">134</a> }
<a name="135" href="#135">135</a>
<a name="136" href="#136">136</a> <em class="comment">// Initialize variables we will require</em>
<a name="137" href="#137">137</a> String localeKey = localeKey(locale);
<a name="138" href="#138">138</a> String originalKey = messageKey(localeKey, key);
<a name="139" href="#139">139</a> String messageKey = <strong>null</strong>;
<a name="140" href="#140">140</a> String message = <strong>null</strong>;
<a name="141" href="#141">141</a> <strong>int</strong> underscore = 0;
<a name="142" href="#142">142</a> <strong>boolean</strong> addIt = false; <em class="comment">// Add if not found under the original key</em>
<a name="143" href="#143">143</a>
<a name="144" href="#144">144</a> <em class="comment">// Loop from specific to general Locales looking for this message</em>
<a name="145" href="#145">145</a> <strong>while</strong> (<strong>true</strong>) {
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