Java Document.getRootElement方法代碼示例

import nu.xom.Document; //導入方法依賴的package包/類
/**
 * imports data from an xml file into the master psp file
 * @param filePath the xml file to import
 * @param overrideExistingElements determines if existing psp elements will be written over
 * @return returns true if successful or false if the import process failed
 */
public static boolean importData(String filePath, boolean overrideExistingElements) {
  PSP.refresh();
  Document importDocument = null;
  Element importRoot = null;   
  
  if (filePath == null || filePath.isEmpty()) {
    Util.debug("The file path parameter passed to DataImporter.importData is null or empty.");
    return false;
  }
  
  try {
    if (new File(filePath).exists()) {      
      importDocument = FileStorage.openDocument(filePath);  
      importRoot = importDocument.getRootElement();
      
      if (importRoot.getLocalName().equals("psp")) {
        Elements importProjects = importRoot.getChildElements(PSP.ELEMENT_NAME);
                  
        if (importProjects != null) {     
          for (int i = 0; i < importProjects.size(); i++) {
            Element importProject = importProjects.get(i);
            String importProjectId = importProject.getAttributeValue(PSP.ID_ATTRIBUTE);
                                                 
            Elements homeProjects = PSP.root.getChildElements(PSP.ELEMENT_NAME);
            boolean isNew = true;
            Element homeProject = null;
            
            if (homeProjects != null) {
              for (int n = 0; n < homeProjects.size(); n++) {
                String homeProjectId = homeProjects.get(n).getAttributeValue(PSP.ID_ATTRIBUTE);
                
                if (homeProjectId.equals(importProjectId)) {
                  isNew = false;
                  homeProject = homeProjects.get(n);
                  break;
                }
              }
            }
            
            if (isNew) {
              Node newProject = importProject.copy();
              PSP.root.appendChild(newProject);
            } else {
              updateProject(importProject, homeProject, overrideExistingElements);
            }
          }     
        }
      }
      else {
        throw new Exception("The root element is not psp.");
      }
    } else {
      throw new Exception("The file " + filePath + " does not exist.");
    }
  }
  catch (Exception e) {
    Util.debug(e.getMessage() + " " + filePath);
    e.printStackTrace();
    return false;
  }
  return true;
}
 

import nu.xom.Document; //導入方法依賴的package包/類
private static void upgrade1_1d1(String[] projectIds) {
        for (int i = 0; i < projectIds.length; i++) {
            Util.debug("Upgrading project " + projectIds[i] + " from version 1.0 to version 1.1d1");
        
            String filePath = FileStorage.JN_DOCPATH + projectIds[i] + File.separator + ".tasklist";
            Document doc = FileStorage.openDocument(filePath);
                        
            Element root = doc.getRootElement();
            Elements tasks = root.getChildElements("task");
                        
            for (int j = 0; j < tasks.size(); j++) {                                
                Element task = tasks.get(j );

//	Decided not to change the date format after all but I'm leaving this code here 
//	in case we need it later. Ryan
//                SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
//
//                Attribute startDateAttr = task.getAttribute("startDate");
//                Date startDate = (new CalendarDate(startDateAttr.getValue(),"/")).getDate();
//                startDateAttr.setValue(sdf.format(startDate));
//
//                Attribute endDateAttr = task.getAttribute("endDate");
//                if (endDateAttr != null) {
//                    Date endDate = (new CalendarDate(endDateAttr.getValue(),"/")).getDate();
//                    endDateAttr.setValue(sdf.format(endDate));                    
//                }
                
                Attribute parentAttr = task.getAttribute("parent");
            	if ((parentAttr == null) || (parentAttr.getValue() == "")) {
            		// no parent, do nothing here
            	}
            	else {
                	// put the task under the parent task
                    String parentId = parentAttr.getValue();
                    for (int k = 0; k < tasks.size(); k++) {
                        Element potentialParent = tasks.get(k);
                        if(parentId.equals(potentialParent.getAttribute("id").getValue())) {
                            // found parent, put self under it
                            task.removeAttribute(parentAttr);
                            task.detach();
                            potentialParent.appendChild(task);                            
                        }
                    }
            	}            	
            }
            doc.setDocType(getCurrentDocType());
            FileStorage.saveDocument(doc,filePath);
        }        
    }
 

import nu.xom.Document; //導入方法依賴的package包/類
public XomReader(final Document document) {
    super(document.getRootElement());
}