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<a name="1" href="#1">1</a> <em class="jxr_comment">/*</em>
<a name="2" href="#2">2</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one or more</em>
<a name="3" href="#3">3</a> <em class="jxr_comment"> * contributor license agreements. See the NOTICE file distributed with</em>
<a name="4" href="#4">4</a> <em class="jxr_comment"> * this work for additional information regarding copyright ownership.</em>
<a name="5" href="#5">5</a> <em class="jxr_comment"> * The ASF licenses this file to You under the Apache License, Version 2.0</em>
<a name="6" href="#6">6</a> <em class="jxr_comment"> * (the "License"); you may not use this file except in compliance with</em>
<a name="7" href="#7">7</a> <em class="jxr_comment"> * the License. You may obtain a copy of the License at</em>
<a name="8" href="#8">8</a> <em class="jxr_comment"> * </em>
<a name="9" href="#9">9</a> <em class="jxr_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="10" href="#10">10</a> <em class="jxr_comment"> * </em>
<a name="11" href="#11">11</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a name="12" href="#12">12</a> <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em>
<a name="13" href="#13">13</a> <em class="jxr_comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
<a name="14" href="#14">14</a> <em class="jxr_comment"> * See the License for the specific language governing permissions and</em>
<a name="15" href="#15">15</a> <em class="jxr_comment"> * limitations under the License.</em>
<a name="16" href="#16">16</a> <em class="jxr_comment"> */</em>
<a name="17" href="#17">17</a>
<a name="18" href="#18">18</a> <strong class="jxr_keyword">package</strong> org.apache.log4j.config;
<a name="19" href="#19">19</a>
<a name="20" href="#20">20</a> <strong class="jxr_keyword">import</strong> org.apache.log4j.Priority;
<a name="21" href="#21">21</a> <strong class="jxr_keyword">import</strong> org.apache.log4j.helpers.LogLog;
<a name="22" href="#22">22</a>
<a name="23" href="#23">23</a> <strong class="jxr_keyword">import</strong> java.beans.BeanInfo;
<a name="24" href="#24">24</a> <strong class="jxr_keyword">import</strong> java.beans.IntrospectionException;
<a name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> java.beans.Introspector;
<a name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> java.beans.PropertyDescriptor;
<a name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> java.io.InterruptedIOException;
<a name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> java.lang.reflect.InvocationTargetException;
<a name="29" href="#29">29</a> <strong class="jxr_keyword">import</strong> java.lang.reflect.Method;
<a name="30" href="#30">30</a>
<a name="31" href="#31">31</a>
<a name="32" href="#32">32</a> <em class="jxr_javadoccomment">/**</em>
<a name="33" href="#33">33</a> <em class="jxr_javadoccomment"> Used for inferring configuration information for a log4j's component.</em>
<a name="34" href="#34">34</a>
<a name="35" href="#35">35</a> <em class="jxr_javadoccomment"> @author Anders Kristensen</em>
<a name="36" href="#36">36</a> <em class="jxr_javadoccomment"> */</em>
<a name="37" href="#37">37</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/log4j/config/PropertyGetter.html">PropertyGetter</a> {
<a name="38" href="#38">38</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Object[] NULL_ARG = <strong class="jxr_keyword">new</strong> Object[] {};
<a name="39" href="#39">39</a> <strong class="jxr_keyword">protected</strong> Object obj;
<a name="40" href="#40">40</a> <strong class="jxr_keyword">protected</strong> PropertyDescriptor[] props;
<a name="41" href="#41">41</a>
<a name="42" href="#42">42</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">interface</strong> <a href="../../../../org/apache/log4j/config/PropertyGetter.html">PropertyCallback</a> {
<a name="43" href="#43">43</a> <strong class="jxr_keyword">void</strong> foundProperty(Object obj, String prefix, String name, Object value);
<a name="44" href="#44">44</a> }
<a name="45" href="#45">45</a>
<a name="46" href="#46">46</a> <em class="jxr_javadoccomment">/**</em>
<a name="47" href="#47">47</a> <em class="jxr_javadoccomment"> Create a new PropertyGetter for the specified Object. This is done</em>
<a name="48" href="#48">48</a> <em class="jxr_javadoccomment"> in prepartion for invoking {@link</em>
<a name="49" href="#49">49</a> <em class="jxr_javadoccomment"> #getProperties(PropertyGetter.PropertyCallback, String)} one or</em>
<a name="50" href="#50">50</a> <em class="jxr_javadoccomment"> more times.</em>
<a name="51" href="#51">51</a>
<a name="52" href="#52">52</a> <em class="jxr_javadoccomment"> @param obj the object for which to set properties */</em>
<a name="53" href="#53">53</a> <strong class="jxr_keyword">public</strong>
<a name="54" href="#54">54</a> <a href="../../../../org/apache/log4j/config/PropertyGetter.html">PropertyGetter</a>(Object obj) <strong class="jxr_keyword">throws</strong> IntrospectionException {
<a name="55" href="#55">55</a> BeanInfo bi = Introspector.getBeanInfo(obj.getClass());
<a name="56" href="#56">56</a> props = bi.getPropertyDescriptors();
<a name="57" href="#57">57</a> <strong class="jxr_keyword">this</strong>.obj = obj;
<a name="58" href="#58">58</a> }
<a name="59" href="#59">59</a>
<a name="60" href="#60">60</a> <strong class="jxr_keyword">public</strong>
<a name="61" href="#61">61</a> <strong class="jxr_keyword">static</strong>
<a name="62" href="#62">62</a> <strong class="jxr_keyword">void</strong> getProperties(Object obj, <a href="../../../../org/apache/log4j/config/PropertyGetter.html">PropertyCallback</a> callback, String prefix) {
<a name="63" href="#63">63</a> <strong class="jxr_keyword">try</strong> {
<a name="64" href="#64">64</a> <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/log4j/config/PropertyGetter.html">PropertyGetter</a>(obj).getProperties(callback, prefix);
<a name="65" href="#65">65</a> } <strong class="jxr_keyword">catch</strong> (IntrospectionException ex) {
<a name="66" href="#66">66</a> LogLog.error(<span class="jxr_string">"Failed to introspect object "</span> + obj, ex);
<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> <strong class="jxr_keyword">public</strong>
<a name="71" href="#71">71</a> <strong class="jxr_keyword">void</strong> getProperties(<a href="../../../../org/apache/log4j/config/PropertyGetter.html">PropertyCallback</a> callback, String prefix) {
<a name="72" href="#72">72</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; props.length; i++) {
<a name="73" href="#73">73</a> Method getter = props[i].getReadMethod();
<a name="74" href="#74">74</a> <strong class="jxr_keyword">if</strong> (getter == <strong class="jxr_keyword">null</strong>) <strong class="jxr_keyword">continue</strong>;
<a name="75" href="#75">75</a> <strong class="jxr_keyword">if</strong> (!isHandledType(getter.getReturnType())) {
<a name="76" href="#76">76</a> <em class="jxr_comment">//System.err.println("Ignoring " + props[i].getName() +" " + getter.getReturnType());</em>
<a name="77" href="#77">77</a> <strong class="jxr_keyword">continue</strong>;
<a name="78" href="#78">78</a> }
<a name="79" href="#79">79</a> String name = props[i].getName();
<a name="80" href="#80">80</a> <strong class="jxr_keyword">try</strong> {
<a name="81" href="#81">81</a> Object result = getter.invoke(obj, NULL_ARG);
<a name="82" href="#82">82</a> <em class="jxr_comment">//System.err.println("PROP " + name +": " + result);</em>
<a name="83" href="#83">83</a> <strong class="jxr_keyword">if</strong> (result != <strong class="jxr_keyword">null</strong>) {
<a name="84" href="#84">84</a> callback.foundProperty(obj, prefix, name, result);
<a name="85" href="#85">85</a> }
<a name="86" href="#86">86</a> } <strong class="jxr_keyword">catch</strong> (IllegalAccessException ex) {
<a name="87" href="#87">87</a> LogLog.warn(<span class="jxr_string">"Failed to get value of property "</span> + name);
<a name="88" href="#88">88</a> } <strong class="jxr_keyword">catch</strong> (InvocationTargetException ex) {
<a name="89" href="#89">89</a> <strong class="jxr_keyword">if</strong> (ex.getTargetException() instanceof InterruptedException
<a name="90" href="#90">90</a> || ex.getTargetException() instanceof InterruptedIOException) {
<a name="91" href="#91">91</a> Thread.currentThread().interrupt();
<a name="92" href="#92">92</a> }
<a name="93" href="#93">93</a> LogLog.warn(<span class="jxr_string">"Failed to get value of property "</span> + name);
<a name="94" href="#94">94</a> } <strong class="jxr_keyword">catch</strong> (RuntimeException ex) {
<a name="95" href="#95">95</a> LogLog.warn(<span class="jxr_string">"Failed to get value of property "</span> + name);
<a name="96" href="#96">96</a> }
<a name="97" href="#97">97</a> }
<a name="98" href="#98">98</a> }
<a name="99" href="#99">99</a>
<a name="100" href="#100">100</a> <strong class="jxr_keyword">protected</strong>
<a name="101" href="#101">101</a> <strong class="jxr_keyword">boolean</strong> isHandledType(Class type) {
<a name="102" href="#102">102</a> <strong class="jxr_keyword">return</strong> String.<strong class="jxr_keyword">class</strong>.isAssignableFrom(type) ||
<a name="103" href="#103">103</a> Integer.TYPE.isAssignableFrom(type) ||
<a name="104" href="#104">104</a> Long.TYPE.isAssignableFrom(type) ||
<a name="105" href="#105">105</a> Boolean.TYPE.isAssignableFrom(type) ||
<a name="106" href="#106">106</a> Priority.<strong class="jxr_keyword">class</strong>.isAssignableFrom(type);
<a name="107" href="#107">107</a> }
<a name="108" href="#108">108</a> }
</pre>
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