transclusionfilter.html

用JAVA编写的,在做实验的时候留下来的,本来想删的,但是传上来,大家分享吧

<a name="91" href="#91">91</a>                  ATTR_MAX_SPECULATIVE_HOPS,
<a name="92" href="#92">92</a>                  <span class="string">"Maximum number of consecutive speculative (i.e. URIs"</span> +
<a name="93" href="#93">93</a>                  <span class="string">" extracted that we are not sure if they are embeds or"</span> +
<a name="94" href="#94">94</a>                  <span class="string">" not) hops to allow.\nA value of -1 means no upper limit."</span>,
<a name="95" href="#95">95</a>                  <strong>new</strong> Integer(DEFAULT_MAX_SPECULATIVE_HOPS)));
<a name="96" href="#96">96</a>          addElementToDefinition(
<a name="97" href="#97">97</a>              <strong>new</strong> <a href="../../../../org/archive/crawler/settings/SimpleType.html">SimpleType</a>(
<a name="98" href="#98">98</a>                  ATTR_MAX_REFERRAL_HOPS,
<a name="99" href="#99">99</a>                  <span class="string">"Maximum number of consecutive referral hops to allow.\n"</span> +
<a name="100" href="#100">100</a>                 <span class="string">"A value of -1 means no upper limit."</span>,
<a name="101" href="#101">101</a>                 <strong>new</strong> Integer(DEFAULT_MAX_REFERRAL_HOPS)));
<a name="102" href="#102">102</a>         addElementToDefinition(
<a name="103" href="#103">103</a>             <strong>new</strong> <a href="../../../../org/archive/crawler/settings/SimpleType.html">SimpleType</a>(
<a name="104" href="#104">104</a>                 ATTR_MAX_EMBED_HOPS,
<a name="105" href="#105">105</a>                 <span class="string">"Maximum number of consecutive embed hops to allow.\n"</span> +
<a name="106" href="#106">106</a>                 <span class="string">"A value of -1 means no upper limit."</span>,
<a name="107" href="#107">107</a>                 <strong>new</strong> Integer(DEFAULT_MAX_EMBED_HOPS)));
<a name="108" href="#108">108</a>     }
<a name="109" href="#109">109</a> 
<a name="110" href="#110">110</a>     <em class="comment">/*<em class="comment"> (non-Javadoc)</em></em>
<a name="111" href="#111">111</a> <em class="comment">     * @see org.archive.crawler.framework.Filter#innerAccepts(java.lang.Object)</em>
<a name="112" href="#112">112</a> <em class="comment">     */</em>
<a name="113" href="#113">113</a>     <strong>protected</strong> <strong>boolean</strong> innerAccepts(Object o) {
<a name="114" href="#114">114</a>         <strong>if</strong>(! (o instanceof CandidateURI)) {
<a name="115" href="#115">115</a>             <strong>return</strong> false;
<a name="116" href="#116">116</a>         }
<a name="117" href="#117">117</a>         String path = ((CandidateURI)o).getPathFromSeed();
<a name="118" href="#118">118</a>         <strong>int</strong> transCount = 0;
<a name="119" href="#119">119</a>         <strong>int</strong> specCount = 0;
<a name="120" href="#120">120</a>         <strong>int</strong> refCount = 0;
<a name="121" href="#121">121</a>         <strong>int</strong> embedCount = 0;
<a name="122" href="#122">122</a>         loop: <strong>for</strong>(<strong>int</strong> i=path.length()-1;i>=0;i--) {
<a name="123" href="#123">123</a>             <em class="comment">// everything except 'L' is considered transitive</em>
<a name="124" href="#124">124</a>             <strong>switch</strong> (path.charAt(i)) {
<a name="125" href="#125">125</a>                 <strong>case</strong> Link.NAVLINK_HOP: {
<a name="126" href="#126">126</a>                     <strong>break</strong> loop;
<a name="127" href="#127">127</a>                 }
<a name="128" href="#128">128</a>                 <strong>case</strong> Link.PREREQ_HOP: {
<a name="129" href="#129">129</a>                     <strong>if</strong>(transCount==0) {
<a name="130" href="#130">130</a>                         <em class="comment">// always consider a trailing P as a 1-hop trans inclusion; disregard previous hops</em>
<a name="131" href="#131">131</a>                         transCount++;
<a name="132" href="#132">132</a>                         <strong>break</strong> loop;
<a name="133" href="#133">133</a>                     }
<a name="134" href="#134">134</a>                     <em class="comment">// otherwise, just count as another regular trans hop</em>
<a name="135" href="#135">135</a>                     <strong>break</strong>;
<a name="136" href="#136">136</a>                 }
<a name="137" href="#137">137</a>                 <strong>case</strong> Link.SPECULATIVE_HOP: {
<a name="138" href="#138">138</a>                     specCount++;
<a name="139" href="#139">139</a>                     <strong>break</strong>;
<a name="140" href="#140">140</a>                 }
<a name="141" href="#141">141</a>                 <strong>case</strong> Link.REFER_HOP: {
<a name="142" href="#142">142</a>                     refCount++;
<a name="143" href="#143">143</a>                     <strong>break</strong>;
<a name="144" href="#144">144</a>                 }
<a name="145" href="#145">145</a>                 <strong>case</strong> Link.EMBED_HOP: {
<a name="146" href="#146">146</a>                     embedCount++;
<a name="147" href="#147">147</a>                     <strong>break</strong>;
<a name="148" href="#148">148</a>                 }
<a name="149" href="#149">149</a>                 <em class="comment">// FIXME: what is 'D'?</em>
<a name="150" href="#150">150</a>                 <em class="comment">// 'D's get a free pass</em>
<a name="151" href="#151">151</a>             }
<a name="152" href="#152">152</a>             transCount++;
<a name="153" href="#153">153</a>         }
<a name="154" href="#154">154</a> 
<a name="155" href="#155">155</a>         readMaxValues(o);
<a name="156" href="#156">156</a> 
<a name="157" href="#157">157</a>         <em class="comment">// This is a case of possible transclusion</em>
<a name="158" href="#158">158</a>         <strong>return</strong> (transCount > 0) 
<a name="159" href="#159">159</a>             <em class="comment">// ...and the overall number of hops isn't too high</em>
<a name="160" href="#160">160</a>             &amp;&amp; (transCount &lt;= <strong>this</strong>.maxTransHops) 
<a name="161" href="#161">161</a>             <em class="comment">// ...and the number of spec-hops isn't too high</em>
<a name="162" href="#162">162</a>             &amp;&amp; (<strong>this</strong>.maxSpeculativeHops &lt; 0 ||  specCount &lt;= <strong>this</strong>.maxSpeculativeHops) 
<a name="163" href="#163">163</a>             <em class="comment">// ...and the number of referral-hops isn't too high</em>
<a name="164" href="#164">164</a>             &amp;&amp; (<strong>this</strong>.maxReferralHops &lt; 0 || refCount &lt;= <strong>this</strong>.maxReferralHops)
<a name="165" href="#165">165</a>             <em class="comment">// ...and the number of embed-hops isn't too high</em>
<a name="166" href="#166">166</a>             &amp;&amp; (<strong>this</strong>.maxEmbedHops &lt; 0 || embedCount &lt;= <strong>this</strong>.maxEmbedHops);
<a name="167" href="#167">167</a>     }
<a name="168" href="#168">168</a> 
<a name="169" href="#169">169</a>     <strong>public</strong> <strong>void</strong> readMaxValues(Object o) {
<a name="170" href="#170">170</a>         <strong>try</strong> {
<a name="171" href="#171">171</a>             <a href="../../../../org/archive/crawler/framework/CrawlScope.html">CrawlScope</a> scope =
<a name="172" href="#172">172</a>                 (<a href="../../../../org/archive/crawler/framework/CrawlScope.html">CrawlScope</a>) globalSettings().getModule(CrawlScope.ATTR_NAME);
<a name="173" href="#173">173</a>             <strong>this</strong>.maxTransHops = ((Integer) scope.getAttribute(o, ClassicScope.ATTR_MAX_TRANS_HOPS)).intValue();
<a name="174" href="#174">174</a>             <strong>this</strong>.maxSpeculativeHops = ((Integer) getAttribute(o, ATTR_MAX_SPECULATIVE_HOPS)).intValue();
<a name="175" href="#175">175</a>             <strong>this</strong>.maxReferralHops = ((Integer) getAttribute(o, ATTR_MAX_REFERRAL_HOPS)).intValue();
<a name="176" href="#176">176</a>             <strong>this</strong>.maxEmbedHops = ((Integer) getAttribute(o, ATTR_MAX_EMBED_HOPS)).intValue();
<a name="177" href="#177">177</a>         } <strong>catch</strong> (AttributeNotFoundException e) {
<a name="178" href="#178">178</a>             <em class="comment">// TODO Auto-generated catch block</em>
<a name="179" href="#179">179</a>             e.printStackTrace();
<a name="180" href="#180">180</a>         }
<a name="181" href="#181">181</a>     }
<a name="182" href="#182">182</a> 
<a name="183" href="#183">183</a> }
</pre>
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