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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>CopyFromHelper xref</title><link type="text/css" rel="stylesheet" href="../../../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../../../apidocs/com/sun/syndication/feed/impl/CopyFromHelper.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> com.sun.syndication.feed.CopyFrom;<a name="20" href="#20">20</a> <strong>import</strong> com.sun.syndication.feed.impl.BeanIntrospector;<a name="21" href="#21">21</a> <a name="22" href="#22">22</a> <strong>import</strong> java.beans.PropertyDescriptor;<a name="23" href="#23">23</a> <strong>import</strong> java.lang.reflect.Array;<a name="24" href="#24">24</a> <strong>import</strong> java.lang.reflect.Method;<a name="25" href="#25">25</a> <strong>import</strong> java.util.*;<a name="26" href="#26">26</a> <a name="27" href="#27">27</a> <em>/**<em>*</em></em><a name="28" href="#28">28</a> <em> * @author Alejandro Abdelnur</em><a name="29" href="#29">29</a> <em> */</em><a name="30" href="#30">30</a> <strong>public</strong> <strong>class</strong> <a href="../../../../../com/sun/syndication/feed/impl/CopyFromHelper.html">CopyFromHelper</a> {<a name="31" href="#31">31</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> Object[] NO_PARAMS = <strong>new</strong> Object[0];<a name="32" href="#32">32</a> <a name="33" href="#33">33</a> <strong>private</strong> Class _beanInterfaceClass;<a name="34" href="#34">34</a> <strong>private</strong> Map _baseInterfaceMap; <em class="comment">//ENTRIES(propertyName,interface.class)</em><a name="35" href="#35">35</a> <strong>private</strong> Map _baseImplMap; <em class="comment">//ENTRIES(interface.class,implementation.class)</em><a name="36" href="#36">36</a> <a name="37" href="#37">37</a> <strong>public</strong> <a href="../../../../../com/sun/syndication/feed/impl/CopyFromHelper.html">CopyFromHelper</a>(Class beanInterfaceClass,Map basePropInterfaceMap,Map basePropClassImplMap) {<a name="38" href="#38">38</a> _beanInterfaceClass = beanInterfaceClass;<a name="39" href="#39">39</a> _baseInterfaceMap = basePropInterfaceMap;<a name="40" href="#40">40</a> _baseImplMap = basePropClassImplMap;<a name="41" href="#41">41</a> }<a name="42" href="#42">42</a> <a name="43" href="#43">43</a> <strong>public</strong> <strong>void</strong> copy(Object target,Object source) {<a name="44" href="#44">44</a> <strong>try</strong> {<a name="45" href="#45">45</a> PropertyDescriptor[] pds = BeanIntrospector.getPropertyDescriptors(_beanInterfaceClass);<a name="46" href="#46">46</a> <strong>if</strong> (pds!=<strong>null</strong>) {<a name="47" href="#47">47</a> <strong>for</strong> (<strong>int</strong> i=0;i<pds.length;i++) {<a name="48" href="#48">48</a> String propertyName = pds[i].getName();<a name="49" href="#49">49</a> Method pReadMethod = pds[i].getReadMethod();<a name="50" href="#50">50</a> Method pWriteMethod = pds[i].getWriteMethod();<a name="51" href="#51">51</a> <strong>if</strong> (pReadMethod!=<strong>null</strong> && pWriteMethod!=<strong>null</strong> && <em class="comment">// ensure it has getter and setter methods</em><a name="52" href="#52">52</a> pReadMethod.getDeclaringClass()!=Object.<strong>class</strong> && <em class="comment">// filter Object.class getter methods</em><a name="53" href="#53">53</a> pReadMethod.getParameterTypes().length==0 && <em class="comment">// filter getter methods that take parameters</em><a name="54" href="#54">54</a> _baseInterfaceMap.containsKey(propertyName)) { <em class="comment">// only copies properties defined as copyFrom-able</em><a name="55" href="#55">55</a> Object value = pReadMethod.invoke(source,NO_PARAMS);<a name="56" href="#56">56</a> <strong>if</strong> (value!=<strong>null</strong>) {<a name="57" href="#57">57</a> Class baseInterface = (Class) _baseInterfaceMap.get(propertyName);<a name="58" href="#58">58</a> value = doCopy(value,baseInterface);<a name="59" href="#59">59</a> pWriteMethod.invoke(target,<strong>new</strong> Object[]{value});<a name="60" href="#60">60</a> }<a name="61" href="#61">61</a> }<a name="62" href="#62">62</a> }<a name="63" href="#63">63</a> }<a name="64" href="#64">64</a> }<a name="65" href="#65">65</a> <strong>catch</strong> (Exception ex) {<a name="66" href="#66">66</a> <strong>throw</strong> <strong>new</strong> RuntimeException(<span class="string">"Could not do a copyFrom "</span>+ex, 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>private</strong> <a href="../../../../../com/sun/syndication/feed/CopyFrom.html">CopyFrom</a> createInstance(Class interfaceClass) throws Exception {<a name="71" href="#71">71</a> <strong>if</strong>( _baseImplMap.get(interfaceClass) == <strong>null</strong> ){<a name="72" href="#72">72</a> <strong>return</strong> <strong>null</strong>;<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>return</strong> (CopyFrom) ((Class)_baseImplMap.get(interfaceClass)).newInstance();<a name="76" href="#76">76</a> }<a name="77" href="#77">77</a> }<a name="78" href="#78">78</a> <a name="79" href="#79">79</a> <strong>private</strong> Object doCopy(Object value,Class baseInterface) throws Exception {<a name="80" href="#80">80</a> <strong>if</strong> (value!=<strong>null</strong>) {<a name="81" href="#81">81</a> Class vClass = value.getClass();<a name="82" href="#82">82</a> <strong>if</strong> (vClass.isArray()) {<a name="83" href="#83">83</a> value = doCopyArray(value,baseInterface);⌨️ 快捷键说明
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