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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>ClassicScope xref</title><link type="text/css" rel="stylesheet" href="../../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../../apidocs/org/archive/crawler/scope/ClassicScope.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <em class="comment">/*<em class="comment"> Copyright (C) 2005 Internet Archive.</em></em><a name="2" href="#2">2</a> <em class="comment"> *</em><a name="3" href="#3">3</a> <em class="comment"> * This file is part of the Heritrix web crawler (crawler.archive.org).</em><a name="4" href="#4">4</a> <em class="comment"> *</em><a name="5" href="#5">5</a> <em class="comment"> * Heritrix is free software; you can redistribute it and/or modify</em><a name="6" href="#6">6</a> <em class="comment"> * it under the terms of the GNU Lesser Public License as published by</em><a name="7" href="#7">7</a> <em class="comment"> * the Free Software Foundation; either version 2.1 of the License, or</em><a name="8" href="#8">8</a> <em class="comment"> * any later version.</em><a name="9" href="#9">9</a> <em class="comment"> *</em><a name="10" href="#10">10</a> <em class="comment"> * Heritrix is distributed in the hope that it will be useful,</em><a name="11" href="#11">11</a> <em class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</em><a name="12" href="#12">12</a> <em class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</em><a name="13" href="#13">13</a> <em class="comment"> * GNU Lesser Public License for more details.</em><a name="14" href="#14">14</a> <em class="comment"> *</em><a name="15" href="#15">15</a> <em class="comment"> * You should have received a copy of the GNU Lesser Public License</em><a name="16" href="#16">16</a> <em class="comment"> * along with Heritrix; if not, write to the Free Software</em><a name="17" href="#17">17</a> <em class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</em><a name="18" href="#18">18</a> <em class="comment"> *</em><a name="19" href="#19">19</a> <em class="comment"> * ClassicScope.java</em><a name="20" href="#20">20</a> <em class="comment"> * Created on Apr 1, 2003</em><a name="21" href="#21">21</a> <em class="comment"> *</em><a name="22" href="#22">22</a> <em class="comment"> * $Header: /cvsroot/archive-crawler/ArchiveOpenCrawler/src/java/org/archive/crawler/scope/ClassicScope.java,v 1.5 2005/09/22 00:19:17 gojomo Exp $</em><a name="23" href="#23">23</a> <em class="comment"> */</em><a name="24" href="#24">24</a> <strong>package</strong> <a href="../../../../org/archive/crawler/scope/package-summary.html">org.archive.crawler.scope</a>;<a name="25" href="#25">25</a> <a name="26" href="#26">26</a> <strong>import</strong> java.util.logging.Logger;<a name="27" href="#27">27</a> <a name="28" href="#28">28</a> <strong>import</strong> javax.management.AttributeNotFoundException;<a name="29" href="#29">29</a> <a name="30" href="#30">30</a> <strong>import</strong> org.archive.crawler.datamodel.CandidateURI;<a name="31" href="#31">31</a> <strong>import</strong> org.archive.crawler.extractor.Link;<a name="32" href="#32">32</a> <strong>import</strong> org.archive.crawler.filter.OrFilter;<a name="33" href="#33">33</a> <strong>import</strong> org.archive.crawler.framework.CrawlScope;<a name="34" href="#34">34</a> <strong>import</strong> org.archive.crawler.settings.SimpleType;<a name="35" href="#35">35</a> <a name="36" href="#36">36</a> <em>/**<em>*</em></em><a name="37" href="#37">37</a> <em> * ClassicScope: superclass with shared Scope behavior for</em><a name="38" href="#38">38</a> <em> * most common scopes. </em><a name="39" href="#39">39</a> <em> *</em><a name="40" href="#40">40</a> <em> * Roughly, its logic is captured in innerAccept(). A URI is </em><a name="41" href="#41">41</a> <em> * included if:</em><a name="42" href="#42">42</a> <em> * <pre></em><a name="43" href="#43">43</a> <em> * forceAccepts(uri)</em><a name="44" href="#44">44</a> <em> * || (((isSeed(uri) </em><a name="45" href="#45">45</a> <em> * || focusAccepts(uri)) </em><a name="46" href="#46">46</a> <em> * || additionalFocusAccepts(uri) </em><a name="47" href="#47">47</a> <em> * || transitiveAccepts(uri))</em><a name="48" href="#48">48</a> <em> * && !excludeAccepts(uri));</pre></em><a name="49" href="#49">49</a> <em> *</em><a name="50" href="#50">50</a> <em> * Subclasses should override focusAccepts, additionalFocusAccepts,</em><a name="51" href="#51">51</a> <em> * and transitiveAccepts. </em><a name="52" href="#52">52</a> <em> *</em><a name="53" href="#53">53</a> <em> * The excludeFilter may be specified by supplying</em><a name="54" href="#54">54</a> <em> * a <code>exclude</code> subelement. If unspecified, a</em><a name="55" href="#55">55</a> <em> * accepts-none filter will be used -- meaning that</em><a name="56" href="#56">56</a> <em> * no URIs will pass the filter and thus be excluded.</em><a name="57" href="#57">57</a> <em> * </em><a name="58" href="#58">58</a> <em> * @author gojomo</em><a name="59" href="#59">59</a> <em> */</em><a name="60" href="#60">60</a> <strong>public</strong> <strong>class</strong> <a href="../../../../org/archive/crawler/scope/ClassicScope.html">ClassicScope</a> <strong>extends</strong> <a href="../../../../org/archive/crawler/framework/CrawlScope.html">CrawlScope</a> {<a name="61" href="#61">61</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> Logger logger = Logger.getLogger(ClassicScope.<strong>class</strong><a name="62" href="#62">62</a> .getName());<a name="63" href="#63">63</a> <a name="64" href="#64">64</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATTR_EXCLUDE_FILTER = <span class="string">"exclude-filter"</span>;<a name="65" href="#65">65</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATTR_FORCE_ACCEPT_FILTER = <span class="string">"force-accept-filter"</span>;<a name="66" href="#66">66</a> <a name="67" href="#67">67</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATTR_MAX_LINK_HOPS = <span class="string">"max-link-hops"</span>;<a name="68" href="#68">68</a> <a name="69" href="#69">69</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> String ATTR_MAX_TRANS_HOPS = <span class="string">"max-trans-hops"</span>;<a name="70" href="#70">70</a> <a name="71" href="#71">71</a> <strong>private</strong> <a href="../../../../org/archive/crawler/filter/OrFilter.html">OrFilter</a> excludeFilter;<a name="72" href="#72">72</a> <strong>private</strong> <a href="../../../../org/archive/crawler/filter/OrFilter.html">OrFilter</a> forceAcceptFilter;<a name="73" href="#73">73</a> <a name="74" href="#74">74</a> <em>/**<em>*</em></em><a name="75" href="#75">75</a> <em> * @param name</em><a name="76" href="#76">76</a> <em> * ignored by superclass</em><a name="77" href="#77">77</a> <em> */</em><a name="78" href="#78">78</a> <strong>public</strong> <a href="../../../../org/archive/crawler/scope/ClassicScope.html">ClassicScope</a>(String name) {<a name="79" href="#79">79</a> <strong>super</strong>(name);<a name="80" href="#80">80</a> addElementToDefinition(<strong>new</strong> <a href="../../../../org/archive/crawler/settings/SimpleType.html">SimpleType</a>(ATTR_MAX_LINK_HOPS,<a name="81" href="#81">81</a> <span class="string">"Max link hops to include. URIs more than this number "</span><a name="82" href="#82">82</a> + <span class="string">"of links from a seed will not be ruled in-scope. (Such "</span><a name="83" href="#83">83</a> + <span class="string">"determination does not preclude later inclusion if a "</span><a name="84" href="#84">84</a> + <span class="string">"shorter path is later discovered.)"</span>, <strong>new</strong> Integer(25)));<a name="85" href="#85">85</a> addElementToDefinition(<strong>new</strong> <a href="../../../../org/archive/crawler/settings/SimpleType.html">SimpleType</a>(ATTR_MAX_TRANS_HOPS,<a name="86" href="#86">86</a> <span class="string">"Max transitive hops (embeds, referrals, preconditions) to "</span> +<a name="87" href="#87">87</a> <span class="string">"include. URIs reached by more than this number of transitive "</span> +<a name="88" href="#88">88</a> <span class="string">"hops will not be ruled in-scope, even if otherwise on an "</span> +<a name="89" href="#89">89</a> <span class="string">"in-focus site. (Such determination does not preclude later "</span> +<a name="90" href="#90">90</a> <span class="string">" inclusion if a shorter path is later discovered.)"</span>, <a name="91" href="#91">91</a> <strong>new</strong> Integer(5)));<a name="92" href="#92">92</a> <strong>this</strong>.excludeFilter = (OrFilter)addElementToDefinition(<strong>new</strong> OrFilter(<a name="93" href="#93">93</a> ATTR_EXCLUDE_FILTER));<a name="94" href="#94">94</a> <strong>this</strong>.forceAcceptFilter = (OrFilter)addElementToDefinition(<a name="95" href="#95">95</a> <strong>new</strong> <a href="../../../../org/archive/crawler/filter/OrFilter.html">OrFilter</a>(ATTR_FORCE_ACCEPT_FILTER));<a name="96" href="#96">96</a> <strong>this</strong>.forceAcceptFilter.setExpertSetting(<strong>true</strong>);<a name="97" href="#97">97</a> <a name="98" href="#98">98</a> <em class="comment">// Try to preserve the values of these attributes when we exchange</em><a name="99" href="#99">99</a> <em class="comment">// scopes.</em><a name="100" href="#100">100</a> setPreservedFields(<strong>new</strong> String[] { ATTR_SEEDS, ATTR_MAX_LINK_HOPS,<a name="101" href="#101">101</a> ATTR_MAX_TRANS_HOPS, ATTR_EXCLUDE_FILTER,<a name="102" href="#102">102</a> ATTR_FORCE_ACCEPT_FILTER });<a name="103" href="#103">103</a> }<a name="104" href="#104">104</a> <a name="105" href="#105">105</a> <em>/**<em>*</em></em><a name="106" href="#106">106</a> <em> * Default constructor.</em><a name="107" href="#107">107</a> <em> */</em><a name="108" href="#108">108</a> <strong>public</strong> <a href="../../../../org/archive/crawler/scope/ClassicScope.html">ClassicScope</a>() {<a name="109" href="#109">109</a> <strong>this</strong>(CrawlScope.ATTR_NAME);<a name="110" href="#110">110</a> }<a name="111" href="#111">111</a> <a name="112" href="#112">112</a> <em>/**<em>*</em></em><a name="113" href="#113">113</a> <em> * Returns whether the given object (typically a CandidateURI) falls within</em><a name="114" href="#114">114</a> <em> * this scope.</em><a name="115" href="#115">115</a> <em> * </em>⌨️ 快捷键说明
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