rss091userlandparser.html

解析RSS工具源码

<a name="121" href="#121">121</a>         <strong>if</strong> (e!=<strong>null</strong>) {
<a name="122" href="#122">122</a>             channel.setWebMaster(e.getText());
<a name="123" href="#123">123</a>         }
<a name="124" href="#124">124</a>         e = eChannel.getChild(<span class="string">"skipHours"</span>);
<a name="125" href="#125">125</a>         <strong>if</strong> (e!=<strong>null</strong>) {
<a name="126" href="#126">126</a>             List skipHours = <strong>new</strong> ArrayList();
<a name="127" href="#127">127</a>             List eHours = e.getChildren(<span class="string">"hour"</span>,getRSSNamespace());
<a name="128" href="#128">128</a>             <strong>for</strong> (<strong>int</strong> i=0;i&lt;eHours.size();i++) {
<a name="129" href="#129">129</a>                 Element eHour = (Element) eHours.get(i);
<a name="130" href="#130">130</a>                 skipHours.add(<strong>new</strong> Integer(eHour.getText().trim()));
<a name="131" href="#131">131</a>             }
<a name="132" href="#132">132</a>             channel.setSkipHours(skipHours);
<a name="133" href="#133">133</a>         }
<a name="134" href="#134">134</a> 
<a name="135" href="#135">135</a>         e = eChannel.getChild(<span class="string">"skipDays"</span>);
<a name="136" href="#136">136</a>         <strong>if</strong> (e!=<strong>null</strong>) {
<a name="137" href="#137">137</a>             List skipDays = <strong>new</strong> ArrayList();
<a name="138" href="#138">138</a>             List eDays = e.getChildren(<span class="string">"day"</span>,getRSSNamespace());
<a name="139" href="#139">139</a>             <strong>for</strong> (<strong>int</strong> i=0;i&lt;eDays.size();i++) {
<a name="140" href="#140">140</a>                 Element eDay = (Element) eDays.get(i);
<a name="141" href="#141">141</a>                 skipDays.add(eDay.getText().trim());
<a name="142" href="#142">142</a>             }
<a name="143" href="#143">143</a>             channel.setSkipDays(skipDays);
<a name="144" href="#144">144</a>         }
<a name="145" href="#145">145</a>         <strong>return</strong> channel;
<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>     * Parses the root element of an RSS document looking for  image information.</em>
<a name="150" href="#150">150</a> <em>     * &lt;p/></em>
<a name="151" href="#151">151</a> <em>     * It first invokes super.parseImage and then parses and injects the following</em>
<a name="152" href="#152">152</a> <em>     * properties if present: url, link, width, height and description.</em>
<a name="153" href="#153">153</a> <em>     * &lt;p/></em>
<a name="154" href="#154">154</a> <em>     *</em>
<a name="155" href="#155">155</a> <em>     * @param rssRoot the root element of the RSS document to parse for image information.</em>
<a name="156" href="#156">156</a> <em>     * @return the parsed RSSImage bean.</em>
<a name="157" href="#157">157</a> <em>     */</em>
<a name="158" href="#158">158</a>     <strong>protected</strong> <a href="../../../../../com/sun/syndication/feed/rss/Image.html">Image</a> parseImage(Element rssRoot) {
<a name="159" href="#159">159</a>         <a href="../../../../../com/sun/syndication/feed/rss/Image.html">Image</a> image = <strong>super</strong>.parseImage(rssRoot);
<a name="160" href="#160">160</a>         <strong>if</strong> (image!=<strong>null</strong>) {
<a name="161" href="#161">161</a>             Element eImage = getImage(rssRoot);
<a name="162" href="#162">162</a>             Element e = eImage.getChild(<span class="string">"width"</span>,getRSSNamespace());
<a name="163" href="#163">163</a>             <strong>if</strong> (e!=<strong>null</strong>) {
<a name="164" href="#164">164</a>                 image.setWidth(Integer.parseInt(e.getText().trim()));
<a name="165" href="#165">165</a>             }
<a name="166" href="#166">166</a>             e = eImage.getChild(<span class="string">"height"</span>,getRSSNamespace());
<a name="167" href="#167">167</a>             <strong>if</strong> (e!=<strong>null</strong>) {
<a name="168" href="#168">168</a>                 image.setHeight(Integer.parseInt(e.getText().trim()));
<a name="169" href="#169">169</a>             }
<a name="170" href="#170">170</a>             e = eImage.getChild(<span class="string">"description"</span>,getRSSNamespace());
<a name="171" href="#171">171</a>             <strong>if</strong> (e!=<strong>null</strong>) {
<a name="172" href="#172">172</a>                 image.setDescription(e.getText());
<a name="173" href="#173">173</a>             }
<a name="174" href="#174">174</a>         }
<a name="175" href="#175">175</a>         <strong>return</strong> image;
<a name="176" href="#176">176</a>     }
<a name="177" href="#177">177</a> 
<a name="178" href="#178">178</a> 
<a name="179" href="#179">179</a>     <em>/**<em>*</em></em>
<a name="180" href="#180">180</a> <em>     * It looks for the 'item' elements under the 'channel' elemment.</em>
<a name="181" href="#181">181</a> <em>     */</em>
<a name="182" href="#182">182</a>     <strong>protected</strong> List getItems(Element rssRoot) {
<a name="183" href="#183">183</a>         Element eChannel = rssRoot.getChild(<span class="string">"channel"</span>,getRSSNamespace());
<a name="184" href="#184">184</a>         <strong>return</strong> (eChannel!=<strong>null</strong>) ? eChannel.getChildren(<span class="string">"item"</span>,getRSSNamespace()) : Collections.EMPTY_LIST;
<a name="185" href="#185">185</a>     }
<a name="186" href="#186">186</a> 
<a name="187" href="#187">187</a>     <em>/**<em>*</em></em>
<a name="188" href="#188">188</a> <em>     * It looks for the 'image' elements under the 'channel' elemment.</em>
<a name="189" href="#189">189</a> <em>     */</em>
<a name="190" href="#190">190</a>     <strong>protected</strong> Element getImage(Element rssRoot) {
<a name="191" href="#191">191</a>         Element eChannel = rssRoot.getChild(<span class="string">"channel"</span>,getRSSNamespace());
<a name="192" href="#192">192</a>         <strong>return</strong> (eChannel!=<strong>null</strong>) ? eChannel.getChild(<span class="string">"image"</span>,getRSSNamespace()) : <strong>null</strong>;
<a name="193" href="#193">193</a>     }
<a name="194" href="#194">194</a> 
<a name="195" href="#195">195</a>     <em>/**<em>*</em></em>
<a name="196" href="#196">196</a> <em>     * To be overriden by RSS 0.91 Netscape parser</em>
<a name="197" href="#197">197</a> <em>     */</em>
<a name="198" href="#198">198</a>     <strong>protected</strong> String getTextInputLabel() {
<a name="199" href="#199">199</a>         <strong>return</strong> <span class="string">"textInput"</span>;
<a name="200" href="#200">200</a>     }
<a name="201" href="#201">201</a> 
<a name="202" href="#202">202</a>     <em>/**<em>*</em></em>
<a name="203" href="#203">203</a> <em>     * It looks for the 'textinput' elements under the 'channel' elemment.</em>
<a name="204" href="#204">204</a> <em>     */</em>
<a name="205" href="#205">205</a>     <strong>protected</strong> Element getTextInput(Element rssRoot) {
<a name="206" href="#206">206</a>         String elementName = getTextInputLabel();
<a name="207" href="#207">207</a>         Element eChannel = rssRoot.getChild(<span class="string">"channel"</span>,getRSSNamespace());
<a name="208" href="#208">208</a>         <strong>return</strong> (eChannel!=<strong>null</strong>) ? eChannel.getChild(elementName,getRSSNamespace()) : <strong>null</strong>;
<a name="209" href="#209">209</a>     }
<a name="210" href="#210">210</a> 
<a name="211" href="#211">211</a>     <em>/**<em>*</em></em>
<a name="212" href="#212">212</a> <em>     * Parses an item element of an RSS document looking for item information.</em>
<a name="213" href="#213">213</a> <em>     * &lt;p/></em>
<a name="214" href="#214">214</a> <em>     * It first invokes super.parseItem and then parses and injects the description property if present.</em>
<a name="215" href="#215">215</a> <em>     * &lt;p/></em>
<a name="216" href="#216">216</a> <em>     *</em>
<a name="217" href="#217">217</a> <em>     * @param rssRoot the root element of the RSS document in case it's needed for context.</em>
<a name="218" href="#218">218</a> <em>     * @param eItem the item element to parse.</em>
<a name="219" href="#219">219</a> <em>     * @return the parsed RSSItem bean.</em>
<a name="220" href="#220">220</a> <em>     */</em>
<a name="221" href="#221">221</a>     <strong>protected</strong> <a href="../../../../../com/sun/syndication/feed/rss/Item.html">Item</a> parseItem(Element rssRoot, Element eItem) {
<a name="222" href="#222">222</a>         <a href="../../../../../com/sun/syndication/feed/rss/Item.html">Item</a> item = <strong>super</strong>.parseItem(rssRoot,eItem);
<a name="223" href="#223">223</a>         Element e = eItem.getChild(<span class="string">"description"</span>, getRSSNamespace());
<a name="224" href="#224">224</a>         <strong>if</strong> (e!=<strong>null</strong>) {
<a name="225" href="#225">225</a>             item.setDescription(parseItemDescription(rssRoot,e));
<a name="226" href="#226">226</a>         }
<a name="227" href="#227">227</a>         Element ce = eItem.getChild(<span class="string">"encoded"</span>, getContentNamespace());
<a name="228" href="#228">228</a>         <strong>if</strong> (ce != <strong>null</strong>) {
<a name="229" href="#229">229</a>             <a href="../../../../../com/sun/syndication/feed/rss/Content.html">Content</a> content = <strong>new</strong> <a href="../../../../../com/sun/syndication/feed/rss/Content.html">Content</a>();
<a name="230" href="#230">230</a>             content.setType(Content.HTML);
<a name="231" href="#231">231</a>             content.setValue(ce.getText());
<a name="232" href="#232">232</a>             item.setContent(content);
<a name="233" href="#233">233</a>         }
<a name="234" href="#234">234</a>         <strong>return</strong> item;
<a name="235" href="#235">235</a>     }
<a name="236" href="#236">236</a> 
<a name="237" href="#237">237</a>     <strong>protected</strong> <a href="../../../../../com/sun/syndication/feed/rss/Description.html">Description</a> parseItemDescription(Element rssRoot,Element eDesc) {
<a name="238" href="#238">238</a>         <a href="../../../../../com/sun/syndication/feed/rss/Description.html">Description</a> desc = <strong>new</strong> <a href="../../../../../com/sun/syndication/feed/rss/Description.html">Description</a>();
<a name="239" href="#239">239</a>         desc.setType(<span class="string">"text/plain"</span>);
<a name="240" href="#240">240</a>         desc.setValue(eDesc.getText());
<a name="241" href="#241">241</a>         <strong>return</strong> desc;
<a name="242" href="#242">242</a>     }
<a name="243" href="#243">243</a> 
<a name="244" href="#244">244</a> }
</pre>
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