crawlsettingssaxhandler.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="499" href="#499">499</a>                 <a href="../../../../org/archive/crawler/settings/ModuleType.html">ModuleType</a> module = <a href="../../../../org/archive/crawler/settings/SettingsHandler.html">SettingsHandler</a>
<a name="500" href="#500">500</a>                         .instantiateModuleTypeFromClassName(moduleName,
<a name="501" href="#501">501</a>                                 moduleClass);
<a name="502" href="#502">502</a>                 <strong>try</strong> {
<a name="503" href="#503">503</a>                     parentModule.setAttribute(settings, module);
<a name="504" href="#504">504</a>                 } <strong>catch</strong> (AttributeNotFoundException e) {
<a name="505" href="#505">505</a>                     <em class="comment">// Attribute was not found, but the complex type might</em>
<a name="506" href="#506">506</a>                     <em class="comment">// be a MapType and then we are allowed to add new</em>
<a name="507" href="#507">507</a>                     <em class="comment">// elements.</em>
<a name="508" href="#508">508</a>                     <strong>try</strong> {
<a name="509" href="#509">509</a>                         parentModule.addElement(settings, module);
<a name="510" href="#510">510</a>                     } <strong>catch</strong> (IllegalStateException ise) {
<a name="511" href="#511">511</a>                         <em class="comment">// An attribute in the settings file is not in the</em>
<a name="512" href="#512">512</a>                         <em class="comment">// ComplexType's definition, log and skip.</em>
<a name="513" href="#513">513</a>                         logger.log(Level.WARNING,<span class="string">"Module '"</span> + moduleName + <span class="string">"' in '"</span>
<a name="514" href="#514">514</a>                                 + locator.getSystemId() + <span class="string">"', line: "</span>
<a name="515" href="#515">515</a>                                 + locator.getLineNumber() + <span class="string">", column: "</span>
<a name="516" href="#516">516</a>                                 + locator.getColumnNumber()
<a name="517" href="#517">517</a>                                 + <span class="string">" is not defined in '"</span>
<a name="518" href="#518">518</a>                                 + parentModule.getName() + <span class="string">"'."</span>,ise);
<a name="519" href="#519">519</a>                         <strong>throw</strong> <strong>new</strong> SAXException(<strong>new</strong> AttributeNotFoundException(
<a name="520" href="#520">520</a>                                 ise.getMessage()));
<a name="521" href="#521">521</a>                     }
<a name="522" href="#522">522</a>                 }
<a name="523" href="#523">523</a>                 stack.push(module);
<a name="524" href="#524">524</a>             } <strong>catch</strong> (InvocationTargetException e) {
<a name="525" href="#525">525</a>                 logger.log(Level.WARNING,<span class="string">"Couldn't instantiate "</span> + moduleName
<a name="526" href="#526">526</a>                         + <span class="string">", from class: "</span> + moduleClass + <span class="string">"' in '"</span>
<a name="527" href="#527">527</a>                         + locator.getSystemId() + <span class="string">"', line: "</span>
<a name="528" href="#528">528</a>                         + locator.getLineNumber() + <span class="string">", column: "</span>
<a name="529" href="#529">529</a>                         + locator.getColumnNumber(), e);
<a name="530" href="#530">530</a>                 <strong>throw</strong> <strong>new</strong> SAXException(e);
<a name="531" href="#531">531</a>             } <strong>catch</strong> (InvalidAttributeValueException e) {
<a name="532" href="#532">532</a>                 <strong>throw</strong> <strong>new</strong> SAXException(e);
<a name="533" href="#533">533</a>             }
<a name="534" href="#534">534</a>         }
<a name="535" href="#535">535</a> 
<a name="536" href="#536">536</a>         <strong>public</strong> <strong>void</strong> endElement(String name) throws SAXException {
<a name="537" href="#537">537</a>             stack.pop();
<a name="538" href="#538">538</a>         }
<a name="539" href="#539">539</a>     }
<a name="540" href="#540">540</a> 
<a name="541" href="#541">541</a>     <strong>private</strong> <strong>class</strong> MapHandler <strong>extends</strong> ElementHandler {
<a name="542" href="#542">542</a> 
<a name="543" href="#543">543</a>         <strong>public</strong> <strong>void</strong> startElement(String name, Attributes atts)
<a name="544" href="#544">544</a>                 throws SAXException {
<a name="545" href="#545">545</a>             String mapName = atts
<a name="546" href="#546">546</a>                     .getValue(XMLSettingsHandler.XML_ATTRIBUTE_NAME);
<a name="547" href="#547">547</a>             <a href="../../../../org/archive/crawler/settings/ComplexType.html">ComplexType</a> parentModule = (ComplexType) stack.peek();
<a name="548" href="#548">548</a>             <strong>try</strong> {
<a name="549" href="#549">549</a>                 stack.push(parentModule.getAttribute(settings, mapName));
<a name="550" href="#550">550</a>             } <strong>catch</strong> (AttributeNotFoundException e) {
<a name="551" href="#551">551</a>                 <strong>throw</strong> <strong>new</strong> SAXException(e);
<a name="552" href="#552">552</a>             }
<a name="553" href="#553">553</a>         }
<a name="554" href="#554">554</a> 
<a name="555" href="#555">555</a>         <strong>public</strong> <strong>void</strong> endElement(String name) throws SAXException {
<a name="556" href="#556">556</a>             stack.pop();
<a name="557" href="#557">557</a>         }
<a name="558" href="#558">558</a>     }
<a name="559" href="#559">559</a> 
<a name="560" href="#560">560</a>     <strong>private</strong> <strong>class</strong> SimpleElementHandler <strong>extends</strong> ElementHandler {
<a name="561" href="#561">561</a> 
<a name="562" href="#562">562</a>         <strong>public</strong> <strong>void</strong> startElement(String name, Attributes atts)
<a name="563" href="#563">563</a>                 throws SAXException {
<a name="564" href="#564">564</a>             stack.push(atts.getValue(XMLSettingsHandler.XML_ATTRIBUTE_NAME));
<a name="565" href="#565">565</a>         }
<a name="566" href="#566">566</a> 
<a name="567" href="#567">567</a>         <strong>public</strong> <strong>void</strong> endElement(String name) throws SAXException {
<a name="568" href="#568">568</a>             String elementName = (String) stack.pop();
<a name="569" href="#569">569</a>             Object container = stack.peek();
<a name="570" href="#570">570</a>             <strong>if</strong> (container instanceof ComplexType) {
<a name="571" href="#571">571</a>                 <strong>try</strong> {
<a name="572" href="#572">572</a>                     <strong>try</strong> {
<a name="573" href="#573">573</a>                         ((<a href="../../../../org/archive/crawler/settings/ComplexType.html">ComplexType</a>) container).setAttribute(settings,
<a name="574" href="#574">574</a>                                 <strong>new</strong> Attribute(elementName, value));
<a name="575" href="#575">575</a>                     } <strong>catch</strong> (AttributeNotFoundException e) {
<a name="576" href="#576">576</a>                         <em class="comment">// Attribute was not found, but the complex type might</em>
<a name="577" href="#577">577</a>                         <em class="comment">// be a MapType and then we are allowed to add new</em>
<a name="578" href="#578">578</a>                         <em class="comment">// elements.</em>
<a name="579" href="#579">579</a>                         <strong>try</strong> {
<a name="580" href="#580">580</a>                             ((<a href="../../../../org/archive/crawler/settings/ComplexType.html">ComplexType</a>) container).addElement(settings,
<a name="581" href="#581">581</a>                                     <strong>new</strong> <a href="../../../../org/archive/crawler/settings/SimpleType.html">SimpleType</a>(elementName, <span class="string">""</span>, value));
<a name="582" href="#582">582</a>                         } <strong>catch</strong> (IllegalStateException ise) {
<a name="583" href="#583">583</a>                             logger.warning(<span class="string">"Unknown attribute '"</span> + elementName
<a name="584" href="#584">584</a>                                     + <span class="string">"' in '"</span> + locator.getSystemId()
<a name="585" href="#585">585</a>                                     + <span class="string">"', line: "</span> + locator.getLineNumber()
<a name="586" href="#586">586</a>                                     + <span class="string">", column: "</span> + locator.getColumnNumber());
<a name="587" href="#587">587</a>                         }
<a name="588" href="#588">588</a>                     }
<a name="589" href="#589">589</a>                 } <strong>catch</strong> (InvalidAttributeValueException e) {
<a name="590" href="#590">590</a>                     <strong>try</strong> {
<a name="591" href="#591">591</a>                         logger.warning(<span class="string">"Illegal value '"</span>
<a name="592" href="#592">592</a>                                 + value
<a name="593" href="#593">593</a>                                 + <span class="string">"' for attribute '"</span>
<a name="594" href="#594">594</a>                                 + elementName
<a name="595" href="#595">595</a>                                 + <span class="string">"' in '"</span>
<a name="596" href="#596">596</a>                                 + locator.getSystemId()
<a name="597" href="#597">597</a>                                 + <span class="string">"', line: "</span>
<a name="598" href="#598">598</a>                                 + locator.getLineNumber()
<a name="599" href="#599">599</a>                                 + <span class="string">", column: "</span>
<a name="600" href="#600">600</a>                                 + locator.getColumnNumber()
<a name="601" href="#601">601</a>                                 + <span class="string">", Value reset to default value: "</span>
<a name="602" href="#602">602</a>                                 + ((ComplexType) container).getAttribute(
<a name="603" href="#603">603</a>                                         settings, elementName));
<a name="604" href="#604">604</a>                     } <strong>catch</strong> (AttributeNotFoundException e1) {
<a name="605" href="#605">605</a>                         <strong>throw</strong> <strong>new</strong> SAXException(e1);
<a name="606" href="#606">606</a>                     }
<a name="607" href="#607">607</a>                 }
<a name="608" href="#608">608</a>             } <strong>else</strong> {
<a name="609" href="#609">609</a>                 <strong>if</strong> (container == <strong>null</strong>) {
<a name="610" href="#610">610</a>                 	<em class="comment">// We can get here if an override is referring to a global</em>
<a name="611" href="#611">611</a>                     <em class="comment">// filter since removed.  Log it as severe; operator will</em>
<a name="612" href="#612">612</a>                     <em class="comment">// probably want to know of all overrides with references</em>
<a name="613" href="#613">613</a>                     <em class="comment">// to a global filter since removed.</em>
<a name="614" href="#614">614</a>                     logger.severe(<span class="string">"Empty container (Was a referenced parent"</span> +
<a name="615" href="#615">615</a>                         <span class="string">" filter removed?).  Element details: elementName "</span> +
<a name="616" href="#616">616</a>                         elementName + <span class="string">", name "</span> + name);
<a name="617" href="#617">617</a>                 } <strong>else</strong> {
<a name="618" href="#618">618</a>                 	((ListType) container).add(value);
<a name="619" href="#619">619</a>                 }
<a name="620" href="#620">620</a>             }
<a name="621" href="#621">621</a>         }
<a name="622" href="#622">622</a>     }
<a name="623" href="#623">623</a> 
<a name="624" href="#624">624</a>     <strong>private</strong> <strong>class</strong> ListHandler <strong>extends</strong> ElementHandler {
<a name="625" href="#625">625</a> 
<a name="626" href="#626">626</a>         <strong>public</strong> <strong>void</strong> startElement(String name, Attributes atts)
<a name="627" href="#627">627</a>                 throws SAXException {
<a name="628" href="#628">628</a>             String listName = atts
<a name="629" href="#629">629</a>                     .getValue(XMLSettingsHandler.XML_ATTRIBUTE_NAME);
<a name="630" href="#630">630</a>             <a href="../../../../org/archive/crawler/settings/ComplexType.html">ComplexType</a> parentModule = (ComplexType) stack.peek();
<a name="631" href="#631">631</a>             <a href="../../../../org/archive/crawler/settings/ListType.html">ListType</a> list;
<a name="632" href="#632">632</a>             <strong>try</strong> {
<a name="633" href="#633">633</a>                 list = (ListType) parentModule.getAttribute(settings, listName);
<a name="634" href="#634">634</a>             } <strong>catch</strong> (AttributeNotFoundException e) {
<a name="635" href="#635">635</a>                 <strong>throw</strong> <strong>new</strong> SAXException(e);
<a name="636" href="#636">636</a>             }
<a name="637" href="#637">637</a>             list.clear();
<a name="638" href="#638">638</a>             stack.push(list);
<a name="639" href="#639">639</a>         }
<a name="640" href="#640">640</a> 
<a name="641" href="#641">641</a>         <strong>public</strong> <strong>void</strong> endElement(String name) throws SAXException {
<a name="642" href="#642">642</a>             stack.pop();
<a name="643" href="#643">643</a>         }
<a name="644" href="#644">644</a>     }
<a name="645" href="#645">645</a> 
<a name="646" href="#646">646</a>     <em class="comment">/*</em>
<a name="647" href="#647">647</a> <em class="comment">     * (non-Javadoc)</em>
<a name="648" href="#648">648</a> <em class="comment">     *</em>
<a name="649" href="#649">649</a> <em class="comment">     * @see org.archive.crawler.settings.ValueErrorHandler#handleValueError(org.archive.crawler.settings.Constraint.FailedCheck)</em>
<a name="650" href="#650">650</a> <em class="comment">     */</em>
<a name="651" href="#651">651</a>     <strong>public</strong> <strong>void</strong> handleValueError(FailedCheck error) {
<a name="652" href="#652">652</a>         logger.warning(error.getMessage() + <span class="string">"\n Attribute: '"</span>
<a name="653" href="#653">653</a>                 + error.getOwner().getName() + <span class="string">":"</span>
<a name="654" href="#654">654</a>                 + error.getDefinition().getName() + <span class="string">"'\n Value:     '"</span> + value
<a name="655" href="#655">655</a>                 + <span class="string">"'\n File:      '"</span> + locator.getSystemId() + <span class="string">"', line: "</span>
<a name="656" href="#656">656</a>                 + locator.getLineNumber() + <span class="string">", column: "</span>
<a name="657" href="#657">657</a>                 + locator.getColumnNumber());
<a name="658" href="#658">658</a>     }
<a name="659" href="#659">659</a> }
</pre>
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