basewirefeedgenerator.html
来自「rsslibj-1_0RC2,RSS阅读」· HTML 代码 · 共 135 行
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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>BaseWireFeedGenerator xref</title><link type="text/css" rel="stylesheet" href="../../../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../../../apidocs/com/sun/syndication/io/impl/BaseWireFeedGenerator.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <strong>package</strong> <a href="../../../../../com/sun/syndication/io/impl/package-summary.html">com.sun.syndication.io.impl</a>;<a name="2" href="#2">2</a> <a name="3" href="#3">3</a> <strong>import</strong> com.sun.syndication.io.WireFeedGenerator;<a name="4" href="#4">4</a> <strong>import</strong> org.jdom.Element;<a name="5" href="#5">5</a> <strong>import</strong> org.jdom.Namespace;<a name="6" href="#6">6</a> <strong>import</strong> org.jdom.Parent;<a name="7" href="#7">7</a> <a name="8" href="#8">8</a> <strong>import</strong> java.util.HashSet;<a name="9" href="#9">9</a> <strong>import</strong> java.util.Iterator;<a name="10" href="#10">10</a> <strong>import</strong> java.util.List;<a name="11" href="#11">11</a> <strong>import</strong> java.util.Set;<a name="12" href="#12">12</a> <a name="13" href="#13">13</a> <em>/**<em>*</em></em><a name="14" href="#14">14</a> <em> * @author Alejandro Abdelnur</em><a name="15" href="#15">15</a> <em> */</em><a name="16" href="#16">16</a> <strong>public</strong> <strong>abstract</strong> <strong>class</strong> <a href="../../../../../com/sun/syndication/io/impl/BaseWireFeedGenerator.html">BaseWireFeedGenerator</a> implements <a href="../../../../../com/sun/syndication/io/WireFeedGenerator.html">WireFeedGenerator</a> {<a name="17" href="#17">17</a> <a name="18" href="#18">18</a> <em>/**<em>*</em></em><a name="19" href="#19">19</a> <em> * [TYPE].feed.ModuleParser.classes= [className] ...</em><a name="20" href="#20">20</a> <em> */</em><a name="21" href="#21">21</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> String FEED_MODULE_GENERATORS_POSFIX_KEY = <span class="string">".feed.ModuleGenerator.classes"</span>;<a name="22" href="#22">22</a> <a name="23" href="#23">23</a> <em>/**<em>*</em></em><a name="24" href="#24">24</a> <em> * [TYPE].item.ModuleParser.classes= [className] ...</em><a name="25" href="#25">25</a> <em> */</em><a name="26" href="#26">26</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> String ITEM_MODULE_GENERATORS_POSFIX_KEY = <span class="string">".item.ModuleGenerator.classes"</span>;<a name="27" href="#27">27</a> <a name="28" href="#28">28</a> <a name="29" href="#29">29</a> <strong>private</strong> String _type;<a name="30" href="#30">30</a> <strong>private</strong> <a href="../../../../../com/sun/syndication/io/impl/ModuleGenerators.html">ModuleGenerators</a> _feedModuleGenerators;<a name="31" href="#31">31</a> <strong>private</strong> <a href="../../../../../com/sun/syndication/io/impl/ModuleGenerators.html">ModuleGenerators</a> _itemModuleGenerators;<a name="32" href="#32">32</a> <strong>private</strong> Namespace[] _allModuleNamespaces;<a name="33" href="#33">33</a> <a name="34" href="#34">34</a> <strong>protected</strong> <a href="../../../../../com/sun/syndication/io/impl/BaseWireFeedGenerator.html">BaseWireFeedGenerator</a>(String type) {<a name="35" href="#35">35</a> _type = type;<a name="36" href="#36">36</a> _feedModuleGenerators = <strong>new</strong> <a href="../../../../../com/sun/syndication/io/impl/ModuleGenerators.html">ModuleGenerators</a>(type + FEED_MODULE_GENERATORS_POSFIX_KEY, <strong>this</strong>);<a name="37" href="#37">37</a> _itemModuleGenerators = <strong>new</strong> <a href="../../../../../com/sun/syndication/io/impl/ModuleGenerators.html">ModuleGenerators</a>(type + ITEM_MODULE_GENERATORS_POSFIX_KEY, <strong>this</strong>);<a name="38" href="#38">38</a> Set allModuleNamespaces = <strong>new</strong> HashSet();<a name="39" href="#39">39</a> Iterator i = _feedModuleGenerators.getAllNamespaces().iterator();<a name="40" href="#40">40</a> <strong>while</strong> (i.hasNext()) {<a name="41" href="#41">41</a> allModuleNamespaces.add(i.next());<a name="42" href="#42">42</a> }<a name="43" href="#43">43</a> i = _itemModuleGenerators.getAllNamespaces().iterator();<a name="44" href="#44">44</a> <strong>while</strong> (i.hasNext()) {<a name="45" href="#45">45</a> allModuleNamespaces.add(i.next());<a name="46" href="#46">46</a> }<a name="47" href="#47">47</a> _allModuleNamespaces = <strong>new</strong> Namespace[allModuleNamespaces.size()];<a name="48" href="#48">48</a> allModuleNamespaces.toArray(_allModuleNamespaces);<a name="49" href="#49">49</a> }<a name="50" href="#50">50</a> <a name="51" href="#51">51</a> <strong>public</strong> String getType() {<a name="52" href="#52">52</a> <strong>return</strong> _type;<a name="53" href="#53">53</a> }<a name="54" href="#54">54</a> <a name="55" href="#55">55</a> <strong>protected</strong> <strong>void</strong> generateModuleNamespaceDefs(Element root) {<a name="56" href="#56">56</a> <strong>for</strong> (<strong>int</strong> i = 0; i < _allModuleNamespaces.length; i++) {<a name="57" href="#57">57</a> root.addNamespaceDeclaration(_allModuleNamespaces[i]);<a name="58" href="#58">58</a> }<a name="59" href="#59">59</a> }<a name="60" href="#60">60</a> <a name="61" href="#61">61</a> <strong>protected</strong> <strong>void</strong> generateFeedModules(List modules, Element feed) {<a name="62" href="#62">62</a> _feedModuleGenerators.generateModules(modules, feed);<a name="63" href="#63">63</a> }<a name="64" href="#64">64</a> <a name="65" href="#65">65</a> <strong>public</strong> <strong>void</strong> generateItemModules(List modules, Element item) {<a name="66" href="#66">66</a> _itemModuleGenerators.generateModules(modules, item);<a name="67" href="#67">67</a> }<a name="68" href="#68">68</a> <a name="69" href="#69">69</a> <strong>protected</strong> <strong>void</strong> generateForeignMarkup(Element e, List foreignMarkup) {<a name="70" href="#70">70</a> <strong>if</strong> (foreignMarkup != <strong>null</strong>) {<a name="71" href="#71">71</a> Iterator elems = (Iterator) foreignMarkup.iterator();<a name="72" href="#72">72</a> <strong>while</strong> (elems.hasNext()) {<a name="73" href="#73">73</a> Element elem = (Element) elems.next();<a name="74" href="#74">74</a> Parent parent = elem.getParent();<a name="75" href="#75">75</a> <strong>if</strong> (parent != <strong>null</strong>) {<a name="76" href="#76">76</a> parent.removeContent(elem);<a name="77" href="#77">77</a> }<a name="78" href="#78">78</a> e.addContent(elem);<a name="79" href="#79">79</a> }<a name="80" href="#80">80</a> }<a name="81" href="#81">81</a> }<a name="82" href="#82">82</a> <a name="83" href="#83">83</a> <em>/**<em>*</em></em><a name="84" href="#84">84</a> <em> * Purging unused declarations is less optimal, performance-wise, than never adding them in the first place. So, we</em><a name="85" href="#85">85</a> <em> * should still ask the ROME guys to fix their code (not adding dozens of unnecessary module declarations). Having</em><a name="86" href="#86">86</a> <em> * said that: purging them here, before XML generation, is more efficient than parsing and re-molding the XML after</em><a name="87" href="#87">87</a> <em> * ROME generates it.</em><a name="88" href="#88">88</a> <em> * <p/></em><a name="89" href="#89">89</a> <em> * Note that the calling app could still add declarations/modules to the Feed tree after this. Which is fine. But</em><a name="90" href="#90">90</a> <em> * those modules are then responsible for crawling to the root of the tree, at generate() time, to make sure their</em><a name="91" href="#91">91</a> <em> * namespace declarations are present.</em><a name="92" href="#92">92</a> <em> */</em><a name="93" href="#93">93</a> <strong>protected</strong> <strong>static</strong> <strong>void</strong> purgeUnusedNamespaceDeclarations(Element root) {<a name="94" href="#94">94</a> java.util.Set usedPrefixes = <strong>new</strong> java.util.HashSet();<a name="95" href="#95">95</a> collectUsedPrefixes(root, usedPrefixes);<a name="96" href="#96">96</a> <a name="97" href="#97">97</a> List list = root.getAdditionalNamespaces();<a name="98" href="#98">98</a> List additionalNamespaces = <strong>new</strong> java.util.ArrayList();<a name="99" href="#99">99</a> additionalNamespaces.addAll(list); <em class="comment">// the duplication will prevent a ConcurrentModificationException below</em><a name="100" href="#100">100</a> <a name="101" href="#101">101</a> <strong>for</strong> (<strong>int</strong> i = 0; i < additionalNamespaces.size(); i++) {<a name="102" href="#102">102</a> Namespace ns = (Namespace) additionalNamespaces.get(i);<a name="103" href="#103">103</a> String prefix = ns.getPrefix();<a name="104" href="#104">104</a> <strong>if</strong> (prefix != <strong>null</strong> && prefix.length() > 0 && !usedPrefixes.contains(prefix)) {<a name="105" href="#105">105</a> root.removeNamespaceDeclaration(ns);<a name="106" href="#106">106</a> }<a name="107" href="#107">107</a> }<a name="108" href="#108">108</a> }<a name="109" href="#109">109</a> <a name="110" href="#110">110</a> <strong>private</strong> <strong>static</strong> <strong>void</strong> collectUsedPrefixes(Element el, java.util.Set collector) {<a name="111" href="#111">111</a> String prefix = el.getNamespacePrefix();<a name="112" href="#112">112</a> <strong>if</strong> (prefix != <strong>null</strong> && prefix.length() > 0 && !collector.contains(prefix)) {<a name="113" href="#113">113</a> collector.add(prefix);<a name="114" href="#114">114</a> }<a name="115" href="#115">115</a> List kids = el.getChildren();<a name="116" href="#116">116</a> <strong>for</strong> (<strong>int</strong> i = 0; i < kids.size(); i++) {<a name="117" href="#117">117</a> collectUsedPrefixes((Element) kids.get(i), collector); <em class="comment">// recursion - worth it</em><a name="118" href="#118">118</a> }<a name="119" href="#119">119</a> }<a name="120" href="#120">120</a> <a name="121" href="#121">121</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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