credentialavatar.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="115" href="#115">115</a>     <em>/**<em>*</em></em>
<a name="116" href="#116">116</a> <em>     * Shutdown default constructor.</em>
<a name="117" href="#117">117</a> <em>     */</em>
<a name="118" href="#118">118</a>     <strong>private</strong> <a href="../../../../../org/archive/crawler/datamodel/credential/CredentialAvatar.html">CredentialAvatar</a>() {
<a name="119" href="#119">119</a>         <strong>super</strong>();
<a name="120" href="#120">120</a>         <strong>this</strong>.key = <strong>null</strong>;
<a name="121" href="#121">121</a>         <strong>this</strong>.type = <strong>null</strong>;
<a name="122" href="#122">122</a>         <strong>this</strong>.payload = <strong>null</strong>;
<a name="123" href="#123">123</a>     }
<a name="124" href="#124">124</a> 
<a name="125" href="#125">125</a>     <em>/**<em>*</em></em>
<a name="126" href="#126">126</a> <em>     * @param candidateType Type to check.</em>
<a name="127" href="#127">127</a> <em>     * @return True if this is a known credential type.</em>
<a name="128" href="#128">128</a> <em>     */</em>
<a name="129" href="#129">129</a>     <strong>protected</strong> <strong>boolean</strong> checkType(Class candidateType) {
<a name="130" href="#130">130</a>         <strong>boolean</strong> result = false;
<a name="131" href="#131">131</a>         List types = CredentialStore.getCredentialTypes();
<a name="132" href="#132">132</a>         <strong>for</strong> (Iterator i = types.iterator(); i.hasNext();) {
<a name="133" href="#133">133</a>             <strong>if</strong> (((Class)i.next()).equals(candidateType)) {
<a name="134" href="#134">134</a>                 result = <strong>true</strong>;
<a name="135" href="#135">135</a>                 <strong>break</strong>;
<a name="136" href="#136">136</a>             }
<a name="137" href="#137">137</a>         }
<a name="138" href="#138">138</a>         <strong>return</strong> result;
<a name="139" href="#139">139</a>     }
<a name="140" href="#140">140</a> 
<a name="141" href="#141">141</a>     <em>/**<em>*</em></em>
<a name="142" href="#142">142</a> <em>     * @return Returns the payload. May be null.</em>
<a name="143" href="#143">143</a> <em>     */</em>
<a name="144" href="#144">144</a>     <strong>public</strong> String getPayload() {
<a name="145" href="#145">145</a>         <strong>return</strong> <strong>this</strong>.payload;
<a name="146" href="#146">146</a>     }
<a name="147" href="#147">147</a> 
<a name="148" href="#148">148</a>     <em>/**<em>*</em></em>
<a name="149" href="#149">149</a> <em>     * @return Returns the key.</em>
<a name="150" href="#150">150</a> <em>     */</em>
<a name="151" href="#151">151</a>     <strong>public</strong> String getKey() {
<a name="152" href="#152">152</a>         <strong>return</strong> <strong>this</strong>.key;
<a name="153" href="#153">153</a>     }
<a name="154" href="#154">154</a> 
<a name="155" href="#155">155</a>     <em>/**<em>*</em></em>
<a name="156" href="#156">156</a> <em>     * @return Type represented by this avatar.</em>
<a name="157" href="#157">157</a> <em>     */</em>
<a name="158" href="#158">158</a>     <strong>public</strong> Class getType() {
<a name="159" href="#159">159</a>         <strong>return</strong> <strong>this</strong>.type;
<a name="160" href="#160">160</a>     }
<a name="161" href="#161">161</a> 
<a name="162" href="#162">162</a> 	<em>/**<em>*</em></em>
<a name="163" href="#163">163</a> <em>	 * @param otherType Class to match.</em>
<a name="164" href="#164">164</a> <em>	 * @return True if this credential avatar is of same type.</em>
<a name="165" href="#165">165</a> <em>	 */</em>
<a name="166" href="#166">166</a> 	<strong>public</strong> <strong>boolean</strong> match(Class otherType) {
<a name="167" href="#167">167</a> 		<strong>return</strong> <strong>this</strong>.type.equals(otherType);
<a name="168" href="#168">168</a> 	}
<a name="169" href="#169">169</a> 
<a name="170" href="#170">170</a>     <em>/**<em>*</em></em>
<a name="171" href="#171">171</a> <em>     * @param otherType Credential to match.</em>
<a name="172" href="#172">172</a> <em>     * @param otherKey Key to test.</em>
<a name="173" href="#173">173</a> <em>     * @return True if this is avatar for passed credential.</em>
<a name="174" href="#174">174</a> <em>     */</em>
<a name="175" href="#175">175</a>     <strong>public</strong> <strong>boolean</strong> match(Class otherType, String otherKey) {
<a name="176" href="#176">176</a>         <strong>return</strong> match(otherType) &amp;&amp;
<a name="177" href="#177">177</a>             (otherKey != <strong>null</strong> &amp;&amp; <strong>this</strong>.key != <strong>null</strong> &amp;&amp;
<a name="178" href="#178">178</a>             		<strong>this</strong>.key.equals(otherKey));
<a name="179" href="#179">179</a>     }
<a name="180" href="#180">180</a> 
<a name="181" href="#181">181</a>     <strong>public</strong> String toString() {
<a name="182" href="#182">182</a>         <strong>return</strong> getType() + <span class="string">"."</span> + <strong>this</strong>.getKey();
<a name="183" href="#183">183</a>     }
<a name="184" href="#184">184</a> 
<a name="185" href="#185">185</a>     <em>/**<em>*</em></em>
<a name="186" href="#186">186</a> <em>     * @param handler Settings handler.</em>
<a name="187" href="#187">187</a> <em>     * @param curi CrawlURI to use for context.</em>
<a name="188" href="#188">188</a> <em>     * @return The credential this avatar represents.</em>
<a name="189" href="#189">189</a> <em>     */</em>
<a name="190" href="#190">190</a>     <strong>public</strong> <a href="../../../../../org/archive/crawler/datamodel/credential/Credential.html">Credential</a> getCredential(<a href="../../../../../org/archive/crawler/settings/SettingsHandler.html">SettingsHandler</a> handler, <a href="../../../../../org/archive/crawler/datamodel/CrawlURI.html">CrawlURI</a> curi) {
<a name="191" href="#191">191</a>         <a href="../../../../../org/archive/crawler/datamodel/credential/Credential.html">Credential</a> result = <strong>null</strong>;
<a name="192" href="#192">192</a> 
<a name="193" href="#193">193</a>         <a href="../../../../../org/archive/crawler/datamodel/CredentialStore.html">CredentialStore</a> cs = CredentialStore.getCredentialStore(handler);
<a name="194" href="#194">194</a>         <strong>if</strong> (cs == <strong>null</strong>) {
<a name="195" href="#195">195</a>             logger.severe(<span class="string">"No credential store for "</span> + curi);
<a name="196" href="#196">196</a>             <strong>return</strong> result;
<a name="197" href="#197">197</a>         }
<a name="198" href="#198">198</a> 
<a name="199" href="#199">199</a>         Iterator i = cs.iterator(curi);
<a name="200" href="#200">200</a>         <strong>if</strong> (i == <strong>null</strong>) {
<a name="201" href="#201">201</a>             logger.severe(<span class="string">"Have CredentialAvatar "</span> + toString() +
<a name="202" href="#202">202</a>                 <span class="string">" but no iterator: "</span> + curi);
<a name="203" href="#203">203</a>             <strong>return</strong> result;
<a name="204" href="#204">204</a>         }
<a name="205" href="#205">205</a> 
<a name="206" href="#206">206</a>         <strong>while</strong> (i.hasNext()) {
<a name="207" href="#207">207</a>             <a href="../../../../../org/archive/crawler/datamodel/credential/Credential.html">Credential</a> c = (Credential)i.next();
<a name="208" href="#208">208</a>             <strong>if</strong> (!<strong>this</strong>.type.isInstance(c)) {
<a name="209" href="#209">209</a>                 <strong>continue</strong>;
<a name="210" href="#210">210</a>             }
<a name="211" href="#211">211</a>             String credKey = <strong>null</strong>;
<a name="212" href="#212">212</a>             <strong>try</strong> {
<a name="213" href="#213">213</a>                 credKey = c.getKey(curi);
<a name="214" href="#214">214</a>             }
<a name="215" href="#215">215</a>             <strong>catch</strong> (AttributeNotFoundException e) {
<a name="216" href="#216">216</a>                 logger.severe(<span class="string">"Failed to get key for "</span> + c + <span class="string">" from "</span> + curi);
<a name="217" href="#217">217</a>             }
<a name="218" href="#218">218</a>             <strong>if</strong> (credKey != <strong>null</strong> &amp;&amp; credKey.equals(getKey())) {
<a name="219" href="#219">219</a>                 result = c;
<a name="220" href="#220">220</a>                 <strong>break</strong>;
<a name="221" href="#221">221</a>             }
<a name="222" href="#222">222</a>         }
<a name="223" href="#223">223</a> 
<a name="224" href="#224">224</a>         <strong>if</strong> (result == <strong>null</strong>) {
<a name="225" href="#225">225</a>             logger.severe(<span class="string">"Have CredentialAvatar "</span> + toString() +
<a name="226" href="#226">226</a>                 <span class="string">" but no corresponding credential: "</span> + curi);
<a name="227" href="#227">227</a>         }
<a name="228" href="#228">228</a> 
<a name="229" href="#229">229</a>         <strong>return</strong> result;
<a name="230" href="#230">230</a>     }
<a name="231" href="#231">231</a> }
</pre>
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