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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=UTF-8" /><title>MatchesListRegExpDecideRule xref</title><link type="text/css" rel="stylesheet" href="../../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../../apidocs/org/archive/crawler/deciderules/MatchesListRegExpDecideRule.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <em class="comment">/*<em class="comment"> MatchesListRegExpDecideRule</em></em><a name="2" href="#2">2</a> <em class="comment"> * </em><a name="3" href="#3">3</a> <em class="comment"> * $Id: MatchesListRegExpDecideRule.java 4649 2006-09-25 17:16:55Z paul_jack $</em><a name="4" href="#4">4</a> <em class="comment"> * </em><a name="5" href="#5">5</a> <em class="comment"> * Created on 30.5.2005</em><a name="6" href="#6">6</a> <em class="comment"> *</em><a name="7" href="#7">7</a> <em class="comment"> * Copyright (C) 2005 Kristinn Sigurdsson</em><a name="8" href="#8">8</a> <em class="comment"> * </em><a name="9" href="#9">9</a> <em class="comment"> * This file is part of the Heritrix web crawler (crawler.archive.org).</em><a name="10" href="#10">10</a> <em class="comment"> * </em><a name="11" href="#11">11</a> <em class="comment"> * Heritrix is free software; you can redistribute it and/or modify</em><a name="12" href="#12">12</a> <em class="comment"> * it under the terms of the GNU Lesser Public License as published by</em><a name="13" href="#13">13</a> <em class="comment"> * the Free Software Foundation; either version 2.1 of the License, or</em><a name="14" href="#14">14</a> <em class="comment"> * any later version.</em><a name="15" href="#15">15</a> <em class="comment"> * </em><a name="16" href="#16">16</a> <em class="comment"> * Heritrix is distributed in the hope that it will be useful, </em><a name="17" href="#17">17</a> <em class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</em><a name="18" href="#18">18</a> <em class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</em><a name="19" href="#19">19</a> <em class="comment"> * GNU Lesser Public License for more details.</em><a name="20" href="#20">20</a> <em class="comment"> * </em><a name="21" href="#21">21</a> <em class="comment"> * You should have received a copy of the GNU Lesser Public License</em><a name="22" href="#22">22</a> <em class="comment"> * along with Heritrix; if not, write to the Free Software</em><a name="23" href="#23">23</a> <em class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</em><a name="24" href="#24">24</a> <em class="comment"> */</em><a name="25" href="#25">25</a> <strong>package</strong> <a href="../../../../org/archive/crawler/deciderules/package-summary.html">org.archive.crawler.deciderules</a>;<a name="26" href="#26">26</a> <a name="27" href="#27">27</a> <strong>import</strong> java.util.Iterator;<a name="28" href="#28">28</a> <strong>import</strong> java.util.List;<a name="29" href="#29">29</a> <strong>import</strong> java.util.logging.Level;<a name="30" href="#30">30</a> <strong>import</strong> java.util.logging.Logger;<a name="31" href="#31">31</a> <a name="32" href="#32">32</a> <strong>import</strong> javax.management.AttributeNotFoundException;<a name="33" href="#33">33</a> <a name="34" href="#34">34</a> <strong>import</strong> org.archive.crawler.settings.SimpleType;<a name="35" href="#35">35</a> <strong>import</strong> org.archive.crawler.settings.StringList;<a name="36" href="#36">36</a> <strong>import</strong> org.archive.util.TextUtils;<a name="37" href="#37">37</a> <a name="38" href="#38">38</a> <a name="39" href="#39">39</a> <em>/**<em>*</em></em><a name="40" href="#40">40</a> <em> * Rule applies configured decision to any CrawlURIs whose String URI</em><a name="41" href="#41">41</a> <em> * matches the supplied regexps.</em><a name="42" href="#42">42</a> <em> * <p></em><a name="43" href="#43">43</a> <em> * The list of regular expressions can be considered logically AND or OR.</em><a name="44" href="#44">44</a> <em> *</em><a name="45" href="#45">45</a> <em> * @author Kristinn Sigurdsson</em><a name="46" href="#46">46</a> <em> * </em><a name="47" href="#47">47</a> <em> * @see MatchesRegExpDecideRule</em><a name="48" href="#48">48</a> <em> */</em><a name="49" href="#49">49</a> <strong>public</strong> <strong>class</strong> <a href="../../../../org/archive/crawler/deciderules/MatchesListRegExpDecideRule.html">MatchesListRegExpDecideRule</a> <strong>extends</strong> <a href="../../../../org/archive/crawler/deciderules/PredicatedDecideRule.html">PredicatedDecideRule</a> {<a name="50" href="#50">50</a> <a name="51" href="#51">51</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> <strong>long</strong> serialVersionUID = 3011579758573454930L;<a name="52" href="#52">52</a> <a name="53" href="#53">53</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> Logger logger =<a name="54" href="#54">54</a> Logger.getLogger(MatchesListRegExpDecideRule.<strong>class</strong>.getName());<a name="55" href="#55">55</a> <a name="56" href="#56">56</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATTR_REGEXP_LIST = <span class="string">"regexp-list"</span>;<a name="57" href="#57">57</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATTR_LIST_LOGIC= <span class="string">"list-logic"</span>;<a name="58" href="#58">58</a> <a name="59" href="#59">59</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String DEFAULT_LIST_LOGIC = <span class="string">"OR"</span>;<a name="60" href="#60">60</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String[] LEGAL_LIST_LOGIC = {<span class="string">"OR"</span>,<span class="string">"AND"</span>};<a name="61" href="#61">61</a> <a name="62" href="#62">62</a> <em>/**<em>*</em></em><a name="63" href="#63">63</a> <em> * Usual constructor. </em><a name="64" href="#64">64</a> <em> * @param name</em><a name="65" href="#65">65</a> <em> */</em><a name="66" href="#66">66</a> <strong>public</strong> <a href="../../../../org/archive/crawler/deciderules/MatchesListRegExpDecideRule.html">MatchesListRegExpDecideRule</a>(String name) {<a name="67" href="#67">67</a> <strong>super</strong>(name);<a name="68" href="#68">68</a> setDescription(<span class="string">"MatchesListRegExpDecideRule. Applies the configured "</span> +<a name="69" href="#69">69</a> <span class="string">"decision to URIs matching the supplied regular expressions.\n"</span> +<a name="70" href="#70">70</a> <span class="string">"The list of regular expressions can be considered logically AND "</span> +<a name="71" href="#71">71</a> <span class="string">"or OR."</span>);<a name="72" href="#72">72</a> addElementToDefinition(<a name="73" href="#73">73</a> <strong>new</strong> <a href="../../../../org/archive/crawler/settings/SimpleType.html">SimpleType</a>(ATTR_LIST_LOGIC, <span class="string">"Should the list of regular "</span> +<a name="74" href="#74">74</a> <span class="string">"expressions be considered as logically AND or OR when "</span> +<a name="75" href="#75">75</a> <span class="string">"matching."</span>, <a name="76" href="#76">76</a> DEFAULT_LIST_LOGIC, LEGAL_LIST_LOGIC));<a name="77" href="#77">77</a> addElementToDefinition(<strong>new</strong> <a href="../../../../org/archive/crawler/settings/StringList.html">StringList</a>(ATTR_REGEXP_LIST,<span class="string">"The list of "</span> +<a name="78" href="#78">78</a> <span class="string">"regular expressions to evalute against the URI."</span>));<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> * Evaluate whether given object's string version</em><a name="83" href="#83">83</a> <em> * matches configured regexps</em><a name="84" href="#84">84</a> <em> * </em><a name="85" href="#85">85</a> <em> * @param o</em><a name="86" href="#86">86</a> <em> * @return true if regexps are matched</em><a name="87" href="#87">87</a> <em> */</em><a name="88" href="#88">88</a> <strong>protected</strong> <strong>boolean</strong> evaluate(Object o) {<a name="89" href="#89">89</a> <strong>try</strong> {<a name="90" href="#90">90</a> List regexps = getRegexp(o);<a name="91" href="#91">91</a> <strong>if</strong>(regexps.size()==0){<a name="92" href="#92">92</a> <strong>return</strong> false;<a name="93" href="#93">93</a> }<a name="94" href="#94">94</a> String str = o.toString();<a name="95" href="#95">95</a> Iterator it = regexps.iterator();<a name="96" href="#96">96</a> <a name="97" href="#97">97</a> <strong>boolean</strong> listLogicOR = isListLogicOR(o);<a name="98" href="#98">98</a> <em class="comment">// Result is initialized so that if OR based the default assumption is</em><a name="99" href="#99">99</a> <em class="comment">// false (find no matches) but if AND based the default assumption is</em><a name="100" href="#100">100</a> <em class="comment">// true (finds no non-matches)</em><a name="101" href="#101">101</a> <strong>boolean</strong> result = listLogicOR == false;<a name="102" href="#102">102</a> <a name="103" href="#103">103</a> <strong>while</strong>(it.hasNext()){<a name="104" href="#104">104</a> String regexp = (String)it.next();<a name="105" href="#105">105</a> <strong>boolean</strong> matches = TextUtils.matches(regexp, str);<a name="106" href="#106">106</a> <a name="107" href="#107">107</a> <strong>if</strong> (logger.isLoggable(Level.FINER)) {<a name="108" href="#108">108</a> logger.finer(<span class="string">"Tested '"</span> + str + <span class="string">"' match with regex '"</span> +<a name="109" href="#109">109</a> regexp + <span class="string">" and result was "</span> + matches);<a name="110" href="#110">110</a> }<a name="111" href="#111">111</a> <a name="112" href="#112">112</a> <strong>if</strong>(matches){<a name="113" href="#113">113</a> <strong>if</strong>(listLogicOR){<a name="114" href="#114">114</a> <em class="comment">// OR based and we just got a match, done!</em><a name="115" href="#115">115</a> result = <strong>true</strong>;<a name="116" href="#116">116</a> <strong>break</strong>;<a name="117" href="#117">117</a> }<a name="118" href="#118">118</a> } <strong>else</strong> {<a name="119" href="#119">119</a> <strong>if</strong>(listLogicOR == false){<a name="120" href="#120">120</a> <em class="comment">// AND based and we just found a non-match, done!</em><a name="121" href="#121">121</a> result = false;<a name="122" href="#122">122</a> <strong>break</strong>;<a name="123" href="#123">123</a> }<a name="124" href="#124">124</a> }<a name="125" href="#125">125</a> }<a name="126" href="#126">126</a> <a name="127" href="#127">127</a> <strong>if</strong> (logger.isLoggable(Level.FINE) && result){<a name="128" href="#128">128</a> logger.fine(<span class="string">"Matched: "</span> + str);<a name="129" href="#129">129</a> }<a name="130" href="#130">130</a> <a name="131" href="#131">131</a> <strong>return</strong> result;<a name="132" href="#132">132</a> } <strong>catch</strong> (ClassCastException e) {<a name="133" href="#133">133</a> <em class="comment">// if not CrawlURI, always disregard</em><a name="134" href="#134">134</a> <strong>return</strong> false; <a name="135" href="#135">135</a> }<a name="136" href="#136">136</a> }<a name="137" href="#137">137</a> <a name="138" href="#138">138</a> <em>/**<em>* </em></em><a name="139" href="#139">139</a> <em> * Get the regular expressions list to match the URI against.</em><a name="140" href="#140">140</a> <em> *</em><a name="141" href="#141">141</a> <em> * @param o the object for which the regular expression should be</em><a name="142" href="#142">142</a> <em> * matched against.</em><a name="143" href="#143">143</a> <em> * @return the regular expression to match against.</em><a name="144" href="#144">144</a> <em> */</em><a name="145" href="#145">145</a> <strong>protected</strong> List getRegexp(Object o) {<a name="146" href="#146">146</a> <strong>try</strong> {<a name="147" href="#147">147</a> <strong>return</strong> (StringList) getAttribute(o, ATTR_REGEXP_LIST);<a name="148" href="#148">148</a> } <strong>catch</strong> (AttributeNotFoundException e) {<a name="149" href="#149">149</a> logger.severe(e.getMessage());<a name="150" href="#150">150</a> <em class="comment">// Basically the filter is inactive if this occurs</em><a name="151" href="#151">151</a> <em class="comment">// (The caller should be returning false when regexp is null).</em><a name="152" href="#152">152</a> <strong>return</strong> <strong>null</strong>; <a name="153" href="#153">153</a> }<a name="154" href="#154">154</a> }<a name="155" href="#155">155</a> <a name="156" href="#156">156</a> <strong>protected</strong> <strong>boolean</strong> isListLogicOR(Object o){<a name="157" href="#157">157</a> String logic = DEFAULT_LIST_LOGIC;<a name="158" href="#158">158</a> <strong>try</strong> {<a name="159" href="#159">159</a> logic = (String) getAttribute(o, ATTR_LIST_LOGIC);<a name="160" href="#160">160</a> } <strong>catch</strong> (AttributeNotFoundException e) {<a name="161" href="#161">161</a> logger.severe(e.getMessage());<a name="162" href="#162">162</a> }<a name="163" href="#163">163</a> <strong>return</strong> logic.equals(<span class="string">"OR"</span>) ? <strong>true</strong> : false;<a name="164" href="#164">164</a> }<a name="165" href="#165">165</a> }</pre><hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body></html>?? 快捷鍵說明
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