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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>CloneableBean xref</title><link type="text/css" rel="stylesheet" href="../../../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../../../apidocs/com/sun/syndication/feed/impl/CloneableBean.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.PropertyDescriptor;<a name="20" href="#20">20</a> <strong>import</strong> java.io.Serializable;<a name="21" href="#21">21</a> <strong>import</strong> java.lang.reflect.Array;<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> * Provides deep <b>Bean</b> clonning support.</em><a name="28" href="#28">28</a> <em> * <p></em><a name="29" href="#29">29</a> <em> * It works on all read/write properties, recursively. It support all primitive types, Strings, Collections,</em><a name="30" href="#30">30</a> <em> * Cloneable objects and multi-dimensional arrays of any of them.</em><a name="31" href="#31">31</a> <em> * <p></em><a name="32" href="#32">32</a> <em> * @author Alejandro Abdelnur</em><a name="33" href="#33">33</a> <em> *</em><a name="34" href="#34">34</a> <em> */</em><a name="35" href="#35">35</a> <strong>public</strong> <strong>class</strong> <a href="../../../../../com/sun/syndication/feed/impl/CloneableBean.html">CloneableBean</a> implements Serializable, Cloneable {<a name="36" href="#36">36</a> <a name="37" href="#37">37</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> Class[] NO_PARAMS_DEF = <strong>new</strong> Class[0];<a name="38" href="#38">38</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> Object[] NO_PARAMS = <strong>new</strong> Object[0];<a name="39" href="#39">39</a> <a name="40" href="#40">40</a> <strong>private</strong> Object _obj;<a name="41" href="#41">41</a> <strong>private</strong> Set _ignoreProperties;<a name="42" href="#42">42</a> <a name="43" href="#43">43</a> <em>/**<em>*</em></em><a name="44" href="#44">44</a> <em> * Default constructor.</em><a name="45" href="#45">45</a> <em> * <p></em><a name="46" href="#46">46</a> <em> * To be used by classes extending CloneableBean only.</em><a name="47" href="#47">47</a> <em> * <p></em><a name="48" href="#48">48</a> <em> *</em><a name="49" href="#49">49</a> <em> */</em><a name="50" href="#50">50</a> <strong>protected</strong> <a href="../../../../../com/sun/syndication/feed/impl/CloneableBean.html">CloneableBean</a>() {<a name="51" href="#51">51</a> _obj = <strong>this</strong>;<a name="52" href="#52">52</a> }<a name="53" href="#53">53</a> <a name="54" href="#54">54</a> <em>/**<em>*</em></em><a name="55" href="#55">55</a> <em> * Creates a CloneableBean to be used in a delegation pattern.</em><a name="56" href="#56">56</a> <em> * <p></em><a name="57" href="#57">57</a> <em> * For example:</em><a name="58" href="#58">58</a> <em> * <p></em><a name="59" href="#59">59</a> <em> * <code></em><a name="60" href="#60">60</a> <em> * public class Foo implements Cloneable {</em><a name="61" href="#61">61</a> <em> * private CloneableBean _cloneableBean;</em><a name="62" href="#62">62</a> <em> *</em><a name="63" href="#63">63</a> <em> * public Foo() {</em><a name="64" href="#64">64</a> <em> * _cloneableBean = new CloneableBean(this);</em><a name="65" href="#65">65</a> <em> * }</em><a name="66" href="#66">66</a> <em> *</em><a name="67" href="#67">67</a> <em> * public Object clone() throws CloneNotSupportedException {</em><a name="68" href="#68">68</a> <em> * return _cloneableBean.beanClone();</em><a name="69" href="#69">69</a> <em> * }</em><a name="70" href="#70">70</a> <em> *</em><a name="71" href="#71">71</a> <em> * }</em><a name="72" href="#72">72</a> <em> * </code></em><a name="73" href="#73">73</a> <em> * <p></em><a name="74" href="#74">74</a> <em> * @param obj object bean to clone.</em><a name="75" href="#75">75</a> <em> *</em><a name="76" href="#76">76</a> <em> */</em><a name="77" href="#77">77</a> <strong>public</strong> <a href="../../../../../com/sun/syndication/feed/impl/CloneableBean.html">CloneableBean</a>(Object obj) {<a name="78" href="#78">78</a> <strong>this</strong>(obj,<strong>null</strong>);<a name="79" href="#79">79</a> }<a name="80" href="#80">80</a> <a name="81" href="#81">81</a> <em>/**<em>*</em></em><a name="82" href="#82">82</a> <em> * Creates a CloneableBean to be used in a delegation pattern.</em><a name="83" href="#83">83</a> <em> * <p></em><a name="84" href="#84">84</a> <em> * The property names in the ignoreProperties Set will not be copied into</em><a name="85" href="#85">85</a> <em> * the cloned instance. This is useful for cases where the Bean has convenience</em><a name="86" href="#86">86</a> <em> * properties (properties that are actually references to other properties or</em><a name="87" href="#87">87</a> <em> * properties of properties). For example SyndFeed and SyndEntry beans have</em><a name="88" href="#88">88</a> <em> * convenience properties, publishedDate, author, copyright and categories all</em><a name="89" href="#89">89</a> <em> * of them mapped to properties in the DC Module.</em><a name="90" href="#90">90</a> <em> * <p></em><a name="91" href="#91">91</a> <em> * @param obj object bean to clone.</em><a name="92" href="#92">92</a> <em> * @param ignoreProperties properties to ignore when cloning.</em><a name="93" href="#93">93</a> <em> *</em><a name="94" href="#94">94</a> <em> */</em><a name="95" href="#95">95</a> <strong>public</strong> <a href="../../../../../com/sun/syndication/feed/impl/CloneableBean.html">CloneableBean</a>(Object obj,Set ignoreProperties) {<a name="96" href="#96">96</a> _obj = obj;<a name="97" href="#97">97</a> _ignoreProperties = (ignoreProperties!=<strong>null</strong>) ? ignoreProperties : Collections.EMPTY_SET;<a name="98" href="#98">98</a> }<a name="99" href="#99">99</a> <a name="100" href="#100">100</a> <em>/**<em>*</em></em><a name="101" href="#101">101</a> <em> * Makes a deep bean clone of the object.</em><a name="102" href="#102">102</a> <em> * <p></em><a name="103" href="#103">103</a> <em> * To be used by classes extending CloneableBean. Although it works also for classes using</em><a name="104" href="#104">104</a> <em> * CloneableBean in a delegation pattern, for correctness those classes should use the</em><a name="105" href="#105">105</a> <em> * @see #beanClone() beanClone method.</em><a name="106" href="#106">106</a> <em> * <p></em><a name="107" href="#107">107</a> <em> * @return a clone of the object bean.</em><a name="108" href="#108">108</a> <em> * @throws CloneNotSupportedException thrown if the object bean could not be cloned.</em><a name="109" href="#109">109</a> <em> *</em><a name="110" href="#110">110</a> <em> */</em><a name="111" href="#111">111</a> <strong>public</strong> Object clone() throws CloneNotSupportedException {<a name="112" href="#112">112</a> <strong>return</strong> beanClone();<a name="113" href="#113">113</a> }<a name="114" href="#114">114</a> <a name="115" href="#115">115</a> <em>/**<em>*</em></em><a name="116" href="#116">116</a> <em> * Makes a deep bean clone of the object passed in the constructor.</em><a name="117" href="#117">117</a> <em> * <p></em><a name="118" href="#118">118</a> <em> * To be used by classes using CloneableBean in a delegation pattern,</em><a name="119" href="#119">119</a> <em> * @see #CloneableBean(Object) constructor.</em><a name="120" href="#120">120</a> <em> *</em><a name="121" href="#121">121</a> <em> * @return a clone of the object bean.</em><a name="122" href="#122">122</a> <em> * @throws CloneNotSupportedException thrown if the object bean could not be cloned.</em><a name="123" href="#123">123</a> <em> *</em><a name="124" href="#124">124</a> <em> */</em><a name="125" href="#125">125</a> <strong>public</strong> Object beanClone() throws CloneNotSupportedException {<a name="126" href="#126">126</a> Object clonedBean;<a name="127" href="#127">127</a> <strong>try</strong> {<a name="128" href="#128">128</a> clonedBean = _obj.getClass().newInstance();<a name="129" href="#129">129</a> PropertyDescriptor[] pds = BeanIntrospector.getPropertyDescriptors(_obj.getClass());<a name="130" href="#130">130</a> <strong>if</strong> (pds!=<strong>null</strong>) {<a name="131" href="#131">131</a> <strong>for</strong> (<strong>int</strong> i=0;i<pds.length;i++) {<a name="132" href="#132">132</a> Method pReadMethod = pds[i].getReadMethod();<a name="133" href="#133">133</a> Method pWriteMethod = pds[i].getWriteMethod();<a name="134" href="#134">134</a> <strong>if</strong> (pReadMethod!=<strong>null</strong> && pWriteMethod!=<strong>null</strong> && <em class="comment">// ensure it has getter and setter methods</em>⌨️ 快捷键说明
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