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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head><meta http-equiv="content-type" content="text/html; charset=ISO-8859-1" /><title>BeanIntrospector xref</title><link type="text/css" rel="stylesheet" href="../../../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../../../apidocs/com/sun/syndication/feed/impl/BeanIntrospector.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <em class="comment">/*</em><a name="2" href="#2">2</a> <em class="comment"> * Copyright 2004 Sun Microsystems, Inc.</em><a name="3" href="#3">3</a> <em class="comment"> *</em><a name="4" href="#4">4</a> <em class="comment"> * Licensed under the Apache License, Version 2.0 (the "License");</em><a name="5" href="#5">5</a> <em class="comment"> * you may not use this file except in compliance with the License.</em><a name="6" href="#6">6</a> <em class="comment"> * You may obtain a copy of the License at</em><a name="7" href="#7">7</a> <em class="comment"> *</em><a name="8" href="#8">8</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="9" href="#9">9</a> <em class="comment"> *</em><a name="10" href="#10">10</a> <em class="comment"> * Unless required by applicable law or agreed to in writing, software</em><a name="11" href="#11">11</a> <em class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em><a name="12" href="#12">12</a> <em class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em><a name="13" href="#13">13</a> <em class="comment"> * See the License for the specific language governing permissions and</em><a name="14" href="#14">14</a> <em class="comment"> * limitations under the License.</em><a name="15" href="#15">15</a> <em class="comment"> *</em><a name="16" href="#16">16</a> <em class="comment"> */</em><a name="17" href="#17">17</a> <strong>package</strong> <a href="../../../../../com/sun/syndication/feed/impl/package-summary.html">com.sun.syndication.feed.impl</a>;<a name="18" href="#18">18</a> <a name="19" href="#19">19</a> <strong>import</strong> java.beans.IntrospectionException;<a name="20" href="#20">20</a> <strong>import</strong> java.beans.Introspector;<a name="21" href="#21">21</a> <strong>import</strong> java.beans.PropertyDescriptor;<a name="22" href="#22">22</a> <strong>import</strong> java.lang.reflect.Method;<a name="23" href="#23">23</a> <strong>import</strong> java.lang.reflect.Modifier;<a name="24" href="#24">24</a> <strong>import</strong> java.util.*;<a name="25" href="#25">25</a> <a name="26" href="#26">26</a> <em>/**<em>*</em></em><a name="27" href="#27">27</a> <em> * Obtains all property descriptors from a bean (interface or implementation).</em><a name="28" href="#28">28</a> <em> * <p></em><a name="29" href="#29">29</a> <em> * The java.beans.Introspector does not process the interfaces hierarchy chain, this one does.</em><a name="30" href="#30">30</a> <em> * <p></em><a name="31" href="#31">31</a> <em> * @author Alejandro Abdelnur</em><a name="32" href="#32">32</a> <em> *</em><a name="33" href="#33">33</a> <em> */</em><a name="34" href="#34">34</a> <strong>public</strong> <strong>class</strong> <a href="../../../../../com/sun/syndication/feed/impl/BeanIntrospector.html">BeanIntrospector</a> {<a name="35" href="#35">35</a> <a name="36" href="#36">36</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> Map _introspected = <strong>new</strong> HashMap();<a name="37" href="#37">37</a> <a name="38" href="#38">38</a> <strong>public</strong> <strong>static</strong> <strong>synchronized</strong> PropertyDescriptor[] getPropertyDescriptors(Class klass) throws IntrospectionException {<a name="39" href="#39">39</a> PropertyDescriptor[] descriptors = (PropertyDescriptor[]) _introspected.get(klass);<a name="40" href="#40">40</a> <strong>if</strong> (descriptors==<strong>null</strong>) {<a name="41" href="#41">41</a> descriptors = getPDs(klass);<a name="42" href="#42">42</a> _introspected.put(klass,descriptors);<a name="43" href="#43">43</a> }<a name="44" href="#44">44</a> <strong>return</strong> descriptors;<a name="45" href="#45">45</a> }<a name="46" href="#46">46</a> <a name="47" href="#47">47</a> <strong>private</strong> <strong>static</strong> PropertyDescriptor[] getPDs(Class klass) throws IntrospectionException {<a name="48" href="#48">48</a> Method[] methods = klass.getMethods();<a name="49" href="#49">49</a> Map getters = getPDs(methods,false);<a name="50" href="#50">50</a> Map setters = getPDs(methods,<strong>true</strong>);<a name="51" href="#51">51</a> List pds = merge(getters,setters);<a name="52" href="#52">52</a> PropertyDescriptor[] array = <strong>new</strong> PropertyDescriptor[pds.size()];<a name="53" href="#53">53</a> pds.toArray(array);<a name="54" href="#54">54</a> <strong>return</strong> array;<a name="55" href="#55">55</a> }<a name="56" href="#56">56</a> <a name="57" href="#57">57</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> String SETTER = <span class="string">"set"</span>;<a name="58" href="#58">58</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> String GETTER = <span class="string">"get"</span>;<a name="59" href="#59">59</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> String BOOLEAN_GETTER = <span class="string">"is"</span>;<a name="60" href="#60">60</a> <a name="61" href="#61">61</a> <strong>private</strong> <strong>static</strong> Map getPDs(Method[] methods,<strong>boolean</strong> setters) throws IntrospectionException {<a name="62" href="#62">62</a> Map pds = <strong>new</strong> HashMap();<a name="63" href="#63">63</a> <strong>for</strong> (<strong>int</strong> i=0;i<methods.length;i++) {<a name="64" href="#64">64</a> String pName = <strong>null</strong>;<a name="65" href="#65">65</a> PropertyDescriptor pDescriptor = <strong>null</strong>;<a name="66" href="#66">66</a> <strong>if</strong> ((methods[i].getMod<strong>if</strong>iers()&Mod<strong>if</strong>ier.PUBLIC)!=0) {<a name="67" href="#67">67</a> <strong>if</strong> (setters) {<a name="68" href="#68">68</a> <strong>if</strong> (methods[i].getName().startsWith(SETTER) &&<a name="69" href="#69">69</a> methods[i].getReturnType()==<strong>void</strong>.<strong>class</strong> && methods[i].getParameterTypes().length==1) {<a name="70" href="#70">70</a> pName = Introspector.decapitalize(methods[i].getName().substring(3));<a name="71" href="#71">71</a> pDescriptor = <strong>new</strong> PropertyDescriptor(pName,<strong>null</strong>,methods[i]);<a name="72" href="#72">72</a> }<a name="73" href="#73">73</a> }<a name="74" href="#74">74</a> <strong>else</strong> {<a name="75" href="#75">75</a> <strong>if</strong> (methods[i].getName().startsWith(GETTER) &&<a name="76" href="#76">76</a> methods[i].getReturnType()!=<strong>void</strong>.<strong>class</strong> && methods[i].getParameterTypes().length==0) {<a name="77" href="#77">77</a> pName = Introspector.decapitalize(methods[i].getName().substring(3));<a name="78" href="#78">78</a> pDescriptor = <strong>new</strong> PropertyDescriptor(pName,methods[i],<strong>null</strong>);<a name="79" href="#79">79</a> }<a name="80" href="#80">80</a> <strong>else</strong><a name="81" href="#81">81</a> <strong>if</strong> (methods[i].getName().startsWith(BOOLEAN_GETTER) &&<a name="82" href="#82">82</a> methods[i].getReturnType()==<strong>boolean</strong>.<strong>class</strong> && methods[i].getParameterTypes().length==0) {<a name="83" href="#83">83</a> pName = Introspector.decapitalize(methods[i].getName().substring(2));<a name="84" href="#84">84</a> pDescriptor = <strong>new</strong> PropertyDescriptor(pName,methods[i],<strong>null</strong>);<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> <strong>if</strong> (pName!=<strong>null</strong>) {<a name="89" href="#89">89</a> pds.put(pName,pDescriptor);<a name="90" href="#90">90</a> }<a name="91" href="#91">91</a> }<a name="92" href="#92">92</a> <strong>return</strong> pds;<a name="93" href="#93">93</a> }<a name="94" href="#94">94</a> <a name="95" href="#95">95</a> <strong>private</strong> <strong>static</strong> List merge(Map getters,Map setters) throws IntrospectionException {<a name="96" href="#96">96</a> List props = <strong>new</strong> ArrayList();<a name="97" href="#97">97</a> Set processedProps = <strong>new</strong> HashSet();<a name="98" href="#98">98</a> Iterator gs = getters.keySet().iterator();<a name="99" href="#99">99</a> <strong>while</strong> (gs.hasNext()) {<a name="100" href="#100">100</a> String name = (String) gs.next();<a name="101" href="#101">101</a> PropertyDescriptor getter = (PropertyDescriptor) getters.get(name);<a name="102" href="#102">102</a> PropertyDescriptor setter = (PropertyDescriptor) setters.get(name);<a name="103" href="#103">103</a> <strong>if</strong> (setter!=<strong>null</strong>) {<a name="104" href="#104">104</a> processedProps.add(name);<a name="105" href="#105">105</a> PropertyDescriptor prop = <strong>new</strong> PropertyDescriptor(name,getter.getReadMethod(),setter.getWriteMethod());<a name="106" href="#106">106</a> props.add(prop);<a name="107" href="#107">107</a> }<a name="108" href="#108">108</a> <strong>else</strong> {<a name="109" href="#109">109</a> props.add(getter);<a name="110" href="#110">110</a> }<a name="111" href="#111">111</a> }<a name="112" href="#112">112</a> Set writeOnlyProps = <strong>new</strong> HashSet(setters.keySet());<a name="113" href="#113">113</a> writeOnlyProps.removeAll(processedProps);<a name="114" href="#114">114</a> Iterator ss = writeOnlyProps.iterator();<a name="115" href="#115">115</a> <strong>while</strong> (ss.hasNext()) {<a name="116" href="#116">116</a> String name = (String) ss.next();<a name="117" href="#117">117</a> PropertyDescriptor setter = (PropertyDescriptor) setters.get(name);<a name="118" href="#118">118</a> props.add(setter);<a name="119" href="#119">119</a> }<a name="120" href="#120">120</a> <strong>return</strong> props;<a name="121" href="#121">121</a> }<a name="122" href="#122">122</a> <a name="123" href="#123">123</a> }</pre><hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body></html>⌨️ 快捷键说明
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