rss090generator.html

解析RSS工具源码

<a name="134" href="#134">134</a>         Element  child = parent.getChild(childName,getFeedNamespace());
<a name="135" href="#135">135</a>         <strong>if</strong> (child != <strong>null</strong>) {
<a name="136" href="#136">136</a>             <strong>if</strong> (minLen>0 &amp;&amp; child.getText().length()&lt;minLen) {
<a name="137" href="#137">137</a>                 <strong>throw</strong> <strong>new</strong> <a href="../../../../../com/sun/syndication/io/FeedException.html">FeedException</a>(<span class="string">"Invalid "</span>+getType()+<span class="string">" feed, "</span>+parent.getName()+<span class="string">" "</span>+childName + <span class="string">"short of "</span>+minLen+<span class="string">" length"</span>);
<a name="138" href="#138">138</a>             }
<a name="139" href="#139">139</a>             <strong>if</strong> (maxLen>-1 &amp;&amp; child.getText().length()>maxLen) {
<a name="140" href="#140">140</a>                 <strong>throw</strong> <strong>new</strong> <a href="../../../../../com/sun/syndication/io/FeedException.html">FeedException</a>(<span class="string">"Invalid "</span>+getType()+<span class="string">" feed, "</span>+parent.getName()+<span class="string">" "</span>+childName + <span class="string">"exceeds "</span>+maxLen+<span class="string">" length"</span>);
<a name="141" href="#141">141</a>             }
<a name="142" href="#142">142</a>         }
<a name="143" href="#143">143</a>     }
<a name="144" href="#144">144</a> 
<a name="145" href="#145">145</a> 
<a name="146" href="#146">146</a>     <strong>protected</strong> <strong>void</strong> addImage(<a href="../../../../../com/sun/syndication/feed/rss/Channel.html">Channel</a> channel,Element parent) throws FeedException {
<a name="147" href="#147">147</a>         <a href="../../../../../com/sun/syndication/feed/rss/Image.html">Image</a> image = channel.getImage();
<a name="148" href="#148">148</a>         <strong>if</strong> (image!=<strong>null</strong>) {
<a name="149" href="#149">149</a>             Element eImage = <strong>new</strong> Element(<span class="string">"image"</span>, getFeedNamespace());
<a name="150" href="#150">150</a>             populateImage(image,eImage);
<a name="151" href="#151">151</a>             checkImageConstraints(eImage);
<a name="152" href="#152">152</a>             parent.addContent(eImage);
<a name="153" href="#153">153</a>         }
<a name="154" href="#154">154</a>     }
<a name="155" href="#155">155</a> 
<a name="156" href="#156">156</a>     <strong>protected</strong> <strong>void</strong> populateImage(<a href="../../../../../com/sun/syndication/feed/rss/Image.html">Image</a> image,Element eImage) {
<a name="157" href="#157">157</a>         String title = image.getTitle();
<a name="158" href="#158">158</a>         <strong>if</strong> (title!=<strong>null</strong>) {
<a name="159" href="#159">159</a>             eImage.addContent(generateSimpleElement(<span class="string">"title"</span>,title));
<a name="160" href="#160">160</a>         }
<a name="161" href="#161">161</a>         String url = image.getUrl();
<a name="162" href="#162">162</a>         <strong>if</strong> (url!=<strong>null</strong>) {
<a name="163" href="#163">163</a>             eImage.addContent(generateSimpleElement(<span class="string">"url"</span>,url));
<a name="164" href="#164">164</a>         }
<a name="165" href="#165">165</a>         String link = image.getLink();
<a name="166" href="#166">166</a>         <strong>if</strong> (link!=<strong>null</strong>) {
<a name="167" href="#167">167</a>             eImage.addContent(generateSimpleElement(<span class="string">"link"</span>,link));
<a name="168" href="#168">168</a>         }
<a name="169" href="#169">169</a>     }
<a name="170" href="#170">170</a> 
<a name="171" href="#171">171</a>     <em class="comment">// Thxs DW for this one</em>
<a name="172" href="#172">172</a>     <strong>protected</strong> String getTextInputLabel() {
<a name="173" href="#173">173</a>         <strong>return</strong> <span class="string">"textInput"</span>;
<a name="174" href="#174">174</a>     }
<a name="175" href="#175">175</a> 
<a name="176" href="#176">176</a>     <strong>protected</strong> <strong>void</strong> addTextInput(<a href="../../../../../com/sun/syndication/feed/rss/Channel.html">Channel</a> channel,Element parent) throws FeedException {
<a name="177" href="#177">177</a>         <a href="../../../../../com/sun/syndication/feed/rss/TextInput.html">TextInput</a> textInput = channel.getTextInput();
<a name="178" href="#178">178</a>         <strong>if</strong> (textInput!=<strong>null</strong>) {
<a name="179" href="#179">179</a>             Element eTextInput = <strong>new</strong> Element(getTextInputLabel(), getFeedNamespace());
<a name="180" href="#180">180</a>             populateTextInput(textInput,eTextInput);
<a name="181" href="#181">181</a>             checkTextInputConstraints(eTextInput);
<a name="182" href="#182">182</a>             parent.addContent(eTextInput);
<a name="183" href="#183">183</a>         }
<a name="184" href="#184">184</a>     }
<a name="185" href="#185">185</a> 
<a name="186" href="#186">186</a>     <strong>protected</strong> <strong>void</strong> populateTextInput(<a href="../../../../../com/sun/syndication/feed/rss/TextInput.html">TextInput</a> textInput,Element eTextInput) {
<a name="187" href="#187">187</a>         String title = textInput.getTitle();
<a name="188" href="#188">188</a>         <strong>if</strong> (title!=<strong>null</strong>) {
<a name="189" href="#189">189</a>             eTextInput.addContent(generateSimpleElement(<span class="string">"title"</span>,title));
<a name="190" href="#190">190</a>         }
<a name="191" href="#191">191</a>         String description = textInput.getDescription();
<a name="192" href="#192">192</a>         <strong>if</strong> (description!=<strong>null</strong>) {
<a name="193" href="#193">193</a>             eTextInput.addContent(generateSimpleElement(<span class="string">"description"</span>,description));
<a name="194" href="#194">194</a>         }
<a name="195" href="#195">195</a>         String name = textInput.getName();
<a name="196" href="#196">196</a>         <strong>if</strong> (name!=<strong>null</strong>) {
<a name="197" href="#197">197</a>             eTextInput.addContent(generateSimpleElement(<span class="string">"name"</span>,name));
<a name="198" href="#198">198</a>         }
<a name="199" href="#199">199</a>         String link = textInput.getLink();
<a name="200" href="#200">200</a>         <strong>if</strong> (link!=<strong>null</strong>) {
<a name="201" href="#201">201</a>             eTextInput.addContent(generateSimpleElement(<span class="string">"link"</span>,link));
<a name="202" href="#202">202</a>         }
<a name="203" href="#203">203</a>     }
<a name="204" href="#204">204</a> 
<a name="205" href="#205">205</a>     <strong>protected</strong> <strong>void</strong> addItems(<a href="../../../../../com/sun/syndication/feed/rss/Channel.html">Channel</a> channel,Element parent) throws FeedException {
<a name="206" href="#206">206</a>         List items = channel.getItems();
<a name="207" href="#207">207</a>         <strong>for</strong> (<strong>int</strong> i=0;i&lt;items.size();i++) {
<a name="208" href="#208">208</a>             addItem((Item)items.get(i),parent, i);
<a name="209" href="#209">209</a>         }
<a name="210" href="#210">210</a>         checkItemsConstraints(parent);
<a name="211" href="#211">211</a>     }
<a name="212" href="#212">212</a> 
<a name="213" href="#213">213</a>     <strong>protected</strong> <strong>void</strong> addItem(<a href="../../../../../com/sun/syndication/feed/rss/Item.html">Item</a> item, Element parent, <strong>int</strong> index) throws FeedException {
<a name="214" href="#214">214</a>         Element eItem = <strong>new</strong> Element(<span class="string">"item"</span>, getFeedNamespace());
<a name="215" href="#215">215</a>         populateItem(item,eItem, index);
<a name="216" href="#216">216</a>         checkItemConstraints(eItem);
<a name="217" href="#217">217</a>         generateItemModules(item.getModules(),eItem);
<a name="218" href="#218">218</a>         parent.addContent(eItem);
<a name="219" href="#219">219</a>     }
<a name="220" href="#220">220</a> 
<a name="221" href="#221">221</a>     <strong>protected</strong> <strong>void</strong> populateItem(<a href="../../../../../com/sun/syndication/feed/rss/Item.html">Item</a> item, Element eItem, <strong>int</strong> index) {
<a name="222" href="#222">222</a>         String title = item.getTitle();
<a name="223" href="#223">223</a>         <strong>if</strong> (title!=<strong>null</strong>) {
<a name="224" href="#224">224</a>             eItem.addContent(generateSimpleElement(<span class="string">"title"</span>,title));
<a name="225" href="#225">225</a>         }
<a name="226" href="#226">226</a>         String link = item.getLink();
<a name="227" href="#227">227</a>         <strong>if</strong> (link!=<strong>null</strong>) {
<a name="228" href="#228">228</a>             eItem.addContent(generateSimpleElement(<span class="string">"link"</span>,link));
<a name="229" href="#229">229</a>         }
<a name="230" href="#230">230</a>         generateForeignMarkup(eItem, (List)item.getForeignMarkup());
<a name="231" href="#231">231</a>     }
<a name="232" href="#232">232</a> 
<a name="233" href="#233">233</a>     <strong>protected</strong> Element generateSimpleElement(String name, String value) {
<a name="234" href="#234">234</a>         Element element = <strong>new</strong> Element(name, getFeedNamespace());
<a name="235" href="#235">235</a>         element.addContent(value);
<a name="236" href="#236">236</a>         <strong>return</strong> element;
<a name="237" href="#237">237</a>     }
<a name="238" href="#238">238</a> 
<a name="239" href="#239">239</a>     <strong>protected</strong> <strong>void</strong> checkChannelConstraints(Element eChannel) throws FeedException {
<a name="240" href="#240">240</a>         checkNotNullAndLength(eChannel,<span class="string">"title"</span>, 0, 40);
<a name="241" href="#241">241</a>         checkNotNullAndLength(eChannel,<span class="string">"description"</span>, 0, 500);
<a name="242" href="#242">242</a>         checkNotNullAndLength(eChannel,<span class="string">"link"</span>, 0, 500);
<a name="243" href="#243">243</a>     }
<a name="244" href="#244">244</a> 
<a name="245" href="#245">245</a>     <strong>protected</strong> <strong>void</strong> checkImageConstraints(Element eImage) throws FeedException {
<a name="246" href="#246">246</a>         checkNotNullAndLength(eImage,<span class="string">"title"</span>, 0, 40);
<a name="247" href="#247">247</a>         checkNotNullAndLength(eImage,<span class="string">"url"</span>, 0, 500);
<a name="248" href="#248">248</a>         checkNotNullAndLength(eImage,<span class="string">"link"</span>, 0, 500);
<a name="249" href="#249">249</a>     }
<a name="250" href="#250">250</a> 
<a name="251" href="#251">251</a>     <strong>protected</strong> <strong>void</strong> checkTextInputConstraints(Element eTextInput) throws FeedException {
<a name="252" href="#252">252</a>         checkNotNullAndLength(eTextInput,<span class="string">"title"</span>, 0, 40);
<a name="253" href="#253">253</a>         checkNotNullAndLength(eTextInput,<span class="string">"description"</span>, 0, 100);
<a name="254" href="#254">254</a>         checkNotNullAndLength(eTextInput,<span class="string">"name"</span>, 0, 500);
<a name="255" href="#255">255</a>         checkNotNullAndLength(eTextInput,<span class="string">"link"</span>, 0, 500);
<a name="256" href="#256">256</a>     }
<a name="257" href="#257">257</a> 
<a name="258" href="#258">258</a>     <strong>protected</strong> <strong>void</strong> checkItemsConstraints(Element parent) throws FeedException {
<a name="259" href="#259">259</a>         <strong>int</strong> count = parent.getChildren(<span class="string">"item"</span>,getFeedNamespace()).size();
<a name="260" href="#260">260</a>         <strong>if</strong> (count&lt;1 || count>15) {
<a name="261" href="#261">261</a>             <strong>throw</strong> <strong>new</strong> <a href="../../../../../com/sun/syndication/io/FeedException.html">FeedException</a>(<span class="string">"Invalid "</span>+getType()+<span class="string">" feed, item count is "</span>+count+<span class="string">" it must be between 1 an 15"</span>);
<a name="262" href="#262">262</a>         }
<a name="263" href="#263">263</a>     }
<a name="264" href="#264">264</a> 
<a name="265" href="#265">265</a>     <strong>protected</strong> <strong>void</strong> checkItemConstraints(Element eItem) throws FeedException {
<a name="266" href="#266">266</a>         checkNotNullAndLength(eItem,<span class="string">"title"</span>, 0, 100);
<a name="267" href="#267">267</a>         checkNotNullAndLength(eItem,<span class="string">"link"</span>, 0, 500);
<a name="268" href="#268">268</a>     }
<a name="269" href="#269">269</a> 
<a name="270" href="#270">270</a> }
</pre>
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