surtprefixscope.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="109" href="#109">109</a> <em class="comment">     * @see org.archive.crawler.framework.CrawlScope#initialize(org.archive.crawler.framework.CrawlController)</em>
<a name="110" href="#110">110</a> <em class="comment">     */</em>
<a name="111" href="#111">111</a>     <strong>public</strong> <strong>void</strong> initialize(<a href="../../../../org/archive/crawler/framework/CrawlController.html">CrawlController</a> controller) {
<a name="112" href="#112">112</a>         <strong>super</strong>.initialize(controller);
<a name="113" href="#113">113</a>         readPrefixes();
<a name="114" href="#114">114</a>     }
<a name="115" href="#115">115</a>     
<a name="116" href="#116">116</a>     <em>/**<em>*</em></em>
<a name="117" href="#117">117</a> <em>     * Check if a URI is part of this scope.</em>
<a name="118" href="#118">118</a> <em>     * </em>
<a name="119" href="#119">119</a> <em>     * @param object</em>
<a name="120" href="#120">120</a> <em>     *            An instance of UURI or of CandidateURI.</em>
<a name="121" href="#121">121</a> <em>     * @return True if focus filter accepts passed object.</em>
<a name="122" href="#122">122</a> <em>     */</em>
<a name="123" href="#123">123</a>     <strong>protected</strong> <strong>synchronized</strong> <strong>boolean</strong> focusAccepts(Object object) {
<a name="124" href="#124">124</a>         <em class="comment">// TODO: eliminate duplication wrt/SurtPrefixedDecideRule.evaluate</em>
<a name="125" href="#125">125</a>         <strong>if</strong> (surtPrefixes == <strong>null</strong>) {
<a name="126" href="#126">126</a>             readPrefixes();
<a name="127" href="#127">127</a>         }
<a name="128" href="#128">128</a>         <strong>if</strong> ( (object instanceof CandidateURI) &amp;&amp; 
<a name="129" href="#129">129</a>                 ((Boolean) getUncheckedAttribute(<strong>null</strong>, ATTR_ALSO_CHECK_VIA))
<a name="130" href="#130">130</a>                     .booleanValue()) {
<a name="131" href="#131">131</a>             <strong>if</strong>(focusAccepts(((CandidateURI)object).getVia())) {
<a name="132" href="#132">132</a>                 <strong>return</strong> <strong>true</strong>;
<a name="133" href="#133">133</a>             }
<a name="134" href="#134">134</a>         }
<a name="135" href="#135">135</a>         String candidateSurt = SurtPrefixSet.getCandidateSurt(object);
<a name="136" href="#136">136</a>         <strong>if</strong>(candidateSurt == <strong>null</strong>) {
<a name="137" href="#137">137</a>             <strong>return</strong> false; 
<a name="138" href="#138">138</a>         }
<a name="139" href="#139">139</a>         <strong>return</strong> surtPrefixes.containsPrefixOf(candidateSurt);
<a name="140" href="#140">140</a>     }
<a name="141" href="#141">141</a>     
<a name="142" href="#142">142</a>     <strong>private</strong> <strong>void</strong> readPrefixes() {
<a name="143" href="#143">143</a>         surtPrefixes = <strong>new</strong> <a href="../../../../org/archive/util/SurtPrefixSet.html">SurtPrefixSet</a>(); 
<a name="144" href="#144">144</a>         FileReader fr = <strong>null</strong>;
<a name="145" href="#145">145</a>         
<a name="146" href="#146">146</a>         <em class="comment">// read SURTs from file, if appropriate </em>
<a name="147" href="#147">147</a>         String sourcePath = (String) getUncheckedAttribute(<strong>null</strong>,
<a name="148" href="#148">148</a>                 ATTR_SURTS_SOURCE_FILE);
<a name="149" href="#149">149</a>         <strong>if</strong>(sourcePath.length()>0) {
<a name="150" href="#150">150</a>             File source = <strong>new</strong> File(sourcePath);
<a name="151" href="#151">151</a>             <strong>if</strong> (!source.isAbsolute()) {
<a name="152" href="#152">152</a>                 source = <strong>new</strong> File(getSettingsHandler().getOrder()
<a name="153" href="#153">153</a>                         .getController().getDisk(), sourcePath);
<a name="154" href="#154">154</a>             }
<a name="155" href="#155">155</a>             <strong>try</strong> {
<a name="156" href="#156">156</a>                 fr = <strong>new</strong> FileReader(source);
<a name="157" href="#157">157</a>                 <strong>try</strong> {
<a name="158" href="#158">158</a>                     surtPrefixes.importFromMixed(fr,<strong>true</strong>);
<a name="159" href="#159">159</a>                 } <strong>finally</strong> {
<a name="160" href="#160">160</a>                     fr.close();
<a name="161" href="#161">161</a>                 }
<a name="162" href="#162">162</a>         
<a name="163" href="#163">163</a>             } <strong>catch</strong> (IOException e) {
<a name="164" href="#164">164</a>                 e.printStackTrace();
<a name="165" href="#165">165</a>                 <strong>throw</strong> <strong>new</strong> RuntimeException(e);
<a name="166" href="#166">166</a>             } 
<a name="167" href="#167">167</a>         }
<a name="168" href="#168">168</a>         
<a name="169" href="#169">169</a>         <em class="comment">// interpret seeds as surts, if appropriate</em>
<a name="170" href="#170">170</a>         <strong>boolean</strong> deduceFromSeeds = 
<a name="171" href="#171">171</a>             ((Boolean) getUncheckedAttribute(<strong>null</strong>, ATTR_SEEDS_AS_SURT_PREFIXES))
<a name="172" href="#172">172</a>             .booleanValue();
<a name="173" href="#173">173</a>         <strong>try</strong> {
<a name="174" href="#174">174</a>             fr = <strong>new</strong> FileReader(getSeedfile());
<a name="175" href="#175">175</a>             <strong>try</strong> {
<a name="176" href="#176">176</a>                 surtPrefixes.importFromMixed(fr,deduceFromSeeds);
<a name="177" href="#177">177</a>             } <strong>finally</strong> {
<a name="178" href="#178">178</a>                 fr.close();
<a name="179" href="#179">179</a>             }
<a name="180" href="#180">180</a>         } <strong>catch</strong> (IOException e) {
<a name="181" href="#181">181</a>             e.printStackTrace();
<a name="182" href="#182">182</a>             <strong>throw</strong> <strong>new</strong> RuntimeException(e);
<a name="183" href="#183">183</a>         }  
<a name="184" href="#184">184</a> 
<a name="185" href="#185">185</a>         <em class="comment">// dump surts to file, if appropriate</em>
<a name="186" href="#186">186</a>         String dumpPath = (String) getUncheckedAttribute(<strong>null</strong>,
<a name="187" href="#187">187</a>                 ATTR_SURTS_DUMP_FILE);
<a name="188" href="#188">188</a>         <strong>if</strong>(dumpPath.length()>0) {
<a name="189" href="#189">189</a>             File dump = <strong>new</strong> File(dumpPath);
<a name="190" href="#190">190</a>             <strong>if</strong> (!dump.isAbsolute()) {
<a name="191" href="#191">191</a>                 dump = <strong>new</strong> File(getSettingsHandler().getOrder()
<a name="192" href="#192">192</a>                         .getController().getDisk(), dumpPath);
<a name="193" href="#193">193</a>             }
<a name="194" href="#194">194</a>             <strong>try</strong> {
<a name="195" href="#195">195</a>                 FileWriter fw = <strong>new</strong> FileWriter(dump);
<a name="196" href="#196">196</a>                 <strong>try</strong> {
<a name="197" href="#197">197</a>                     surtPrefixes.exportTo(fw);
<a name="198" href="#198">198</a>                 } <strong>finally</strong> {
<a name="199" href="#199">199</a>                     fw.close();
<a name="200" href="#200">200</a>                 }
<a name="201" href="#201">201</a>             } <strong>catch</strong> (IOException e) {
<a name="202" href="#202">202</a>                 e.printStackTrace();
<a name="203" href="#203">203</a>                 <strong>throw</strong> <strong>new</strong> RuntimeException(e);
<a name="204" href="#204">204</a>             }
<a name="205" href="#205">205</a>         }
<a name="206" href="#206">206</a>     }
<a name="207" href="#207">207</a> 
<a name="208" href="#208">208</a>     <em>/**<em>*</em></em>
<a name="209" href="#209">209</a> <em>     * Re-read prefixes after an update. </em>
<a name="210" href="#210">210</a> <em>     * </em>
<a name="211" href="#211">211</a> <em>     * @see org.archive.crawler.framework.CrawlScope#kickUpdate()</em>
<a name="212" href="#212">212</a> <em>     */</em>
<a name="213" href="#213">213</a>     <strong>public</strong> <strong>synchronized</strong> <strong>void</strong> kickUpdate() {
<a name="214" href="#214">214</a>         <strong>super</strong>.kickUpdate();
<a name="215" href="#215">215</a>         <em class="comment">// TODO: make conditional on file having actually changed,</em>
<a name="216" href="#216">216</a>         <em class="comment">// perhaps by remembering mod-time</em>
<a name="217" href="#217">217</a>         readPrefixes();
<a name="218" href="#218">218</a>     }
<a name="219" href="#219">219</a> }
</pre>
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