Java tutorial
/* * ItemParser.java * * Created on April 29, 2006, 4:27 PM * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.rometools.feed.module.sle.io; import com.sun.syndication.feed.module.Module; import org.rometools.feed.module.sle.SleEntryImpl; import org.rometools.feed.module.sle.types.DateValue; import org.rometools.feed.module.sle.types.EntryValue; import org.rometools.feed.module.sle.types.NumberValue; import org.rometools.feed.module.sle.types.Sort; import org.rometools.feed.module.sle.types.StringValue; import com.sun.syndication.io.impl.DateParser; import org.jdom2.Element; import java.math.BigDecimal; import java.util.ArrayList; import java.util.Date; import java.util.List; import org.jdom2.Namespace; /** * * @author <a href="mailto:cooper@screaming-penguin.com">Robert "kebernet" Cooper</a> */ public class ItemParser implements com.sun.syndication.io.ModuleParser { /** Creates a new instance of ItemParser */ public ItemParser() { super(); } /** * Returns the namespace URI this parser handles. * <p> * * @return the namespace URI. */ public String getNamespaceUri() { return ModuleParser.TEMP.getURI(); } /** * Parses the XML node (JDOM element) extracting module information. * <p> * * @param element the XML node (JDOM element) to extract module information from. * @return a module instance, <b>null</b> if the element did not have module information. */ public Module parse(Element element) { SleEntryImpl sle = new SleEntryImpl(); ArrayList values = new ArrayList(); List groups = element.getChildren("group", ModuleParser.TEMP); for (int i = 0; (groups != null) && (i < groups.size()); i++) { Element group = (Element) groups.get(i); StringValue value = new StringValue(); value.setElement(group.getAttributeValue("element")); value.setLabel(group.getAttributeValue("label")); value.setValue(group.getAttributeValue("value")); if (group.getAttributeValue("ns") != null) value.setNamespace(Namespace.getNamespace(group.getAttributeValue("ns"))); else { value.setNamespace(element.getDocument().getRootElement().getNamespace()); } values.add(value); element.removeContent(group); } sle.setGroupValues((EntryValue[]) values.toArray(new EntryValue[values.size()])); values = (values.size() == 0) ? values : new ArrayList(); List sorts = new ArrayList(element.getChildren("sort", ModuleParser.TEMP)); //System.out.println("]]] sorts on element"+sorts.size()); for (int i = 0; (sorts != null) && (i < sorts.size()); i++) { Element sort = (Element) sorts.get(i); String dataType = sort.getAttributeValue("data-type"); //System.out.println("Doing datatype "+dataType +" :: "+sorts.size()); if ((dataType == null) || dataType.equals(Sort.TEXT_TYPE)) { StringValue value = new StringValue(); value.setElement(sort.getAttributeValue("element")); value.setLabel(sort.getAttributeValue("label")); value.setValue(sort.getAttributeValue("value")); if (sort.getAttributeValue("ns") != null) value.setNamespace(Namespace.getNamespace(sort.getAttributeValue("ns"))); else value.setNamespace(element.getDocument().getRootElement().getNamespace()); values.add(value); element.removeContent(sort); } else if (dataType.equals(Sort.DATE_TYPE)) { DateValue value = new DateValue(); value.setElement(sort.getAttributeValue("element")); value.setLabel(sort.getAttributeValue("label")); if (sort.getAttributeValue("ns") != null) value.setNamespace(Namespace.getNamespace(sort.getAttributeValue("ns"))); else value.setNamespace(element.getDocument().getRootElement().getNamespace()); Date dateValue = null; try { dateValue = DateParser.parseRFC822(sort.getAttributeValue("value")); dateValue = (dateValue == null) ? DateParser.parseW3CDateTime(sort.getAttributeValue("value")) : dateValue; } catch (Exception e) { ; // ignore parse exceptions } value.setValue(dateValue); values.add(value); element.removeContent(sort); } else if (dataType.equals(Sort.NUMBER_TYPE)) { NumberValue value = new NumberValue(); value.setElement(sort.getAttributeValue("element")); value.setLabel(sort.getAttributeValue("label")); if (sort.getAttributeValue("ns") != null) value.setNamespace(Namespace.getNamespace(sort.getAttributeValue("ns"))); else value.setNamespace(element.getDocument().getRootElement().getNamespace()); try { value.setValue(new BigDecimal(sort.getAttributeValue("value"))); } catch (NumberFormatException nfe) { ; // ignore values.add(value); element.removeContent(sort); } } else { throw new RuntimeException("Unknown datatype"); } } //System.out.println("Values created "+values.size()+" from sorts" +sorts.size()); sle.setSortValues((EntryValue[]) values.toArray(new EntryValue[values.size()])); return sle; } }