儲存及擷取草稿信函

以下程式碼用於儲存信函例項。 信函例項的中繼資料儲存在 icdrafts 表格。 系統會產生唯一字串(draftID)並傳回。 然後，此唯一字串將用於擷取儲存的信函例項。

public String save(CCRDocumentInstance letterToSave) throws CCRDocumentException {
  String insertRowSQL = "INSERT INTO aemformstutorial.icdrafts(draftID,documentID,status,owner,name) VALUES(?,?,?,?,?)";
  log.debug(" in save IC Draft" + letterToSave.getDocumentId() + letterToSave.getName());
  UUID uuid = UUID.randomUUID();
  String uuidString = uuid.toString();
  Connection connection = getConnection();
  PreparedStatement pstmt = null;
  Document icData = letterToSave.getData();
  try {
    pstmt = connection.prepareStatement(insertRowSQL);
    pstmt.setString(1, uuidString);
    pstmt.setString(2, letterToSave.getDocumentId());
    pstmt.setString(3, "DRAFT");
    pstmt.setString(4, letterToSave.getCreatedBy());
    pstmt.setString(5, letterToSave.getName());
    icData.copyToFile(new File(uuidString + ".xml"));
    log.debug("Executing the insert statment  " + pstmt.executeUpdate());
    connection.commit();
  } catch (IOException | SQLException e) {
    log.debug("The error is " + e.getMessage());
  } finally {
    if (pstmt != null) {
      try {
        pstmt.close();
      } catch (SQLException e) {
        log.debug("Error in closing prepared statment" + e.getMessage());
      }
    }
    if (connection != null) {
      try {
        log.debug("Closing the connection in Save Letter Draft");
        connection.close();
      } catch (SQLException e) {
        log.debug("Error in closing connection" + e.getMessage());
      }
    }

  }

  return uuidString;
}

獲取信函

已編寫下列程式碼來擷取儲存的草稿信函。
若要載入儲存的信函例項，您需要提供draftID。 我們會根據此draftID查詢資料庫，以取得關於信函的其他中繼資料。 從檔案系統讀取適當的xml，以建立信函資料時會使用相同的draftID。 然後會建構並傳回CCRDocumentInstance物件。

@Override
public CCRDocumentInstance get(String draftID) throws CCRDocumentException {

  String selectStatement = "Select documentID from aemformstutorial.icdrafts where draftID='" + draftID + "'";
  log.debug("The select statement is " + selectStatement);
  Connection connection = getConnection();
  Statement statement = null;
  String documentID = "";
  try {
    statement = connection.createStatement();
    ResultSet rs = statement.executeQuery(selectStatement);
    while (rs.next()) {
      documentID = rs.getString("documentID");

    }
  } catch (SQLException e) {
    log.debug("The error is " + e.getMessage());
  }
  Document draftData = new Document(new File(draftID + ".xml"));
  CCRDocumentInstance draftInstance = new CCRDocumentInstance(draftData, "abc", documentID, CCRDocumentInstance.Status.DRAFT);
  draftInstance.setId(draftID);
  return draftInstance;
}

更新信函

以下代碼用於更新保存的信函實例。 更新的信函資料會使用信函ID寫入檔案系統。

public void update(CCRDocumentInstance letterInstanceToUpdate) throws CCRDocumentException {
        Document icData = letterInstanceToUpdate.getData();
        String draftID = letterInstanceToUpdate.getId();
        log.debug("updating letter instance with draft id =  "+draftID);
        try
            {
                icData.copyToFile(new File(draftID+".xml"));
            }
        catch (IOException e)
            {
                log.debug("Error updating "+e.getMessage());;
            }

    }

獲取所有已保存的信函

AEM Forms不會提供任何現成的使用者介面，以列出儲存的信函。 針對本文，我會使用最適化表單，以表格格式列出儲存的信函例項。
您可以自訂查詢，以擷取儲存的信函例項。 在此範例中，我由「管理員」查詢已儲存的信函例項。

    public List < CCRDocumentInstance > getAll(String arg0, Date arg1, Date arg2, Map < String, Object > arg3) throws CCRDocumentException {
      String selectStatement = "Select * from aemformstutorial.icdrafts where owner = 'admin'";
      Connection connection = getConnection();
      Statement statement = null;
      String documentID = "";
      List < CCRDocumentInstance > listOfDrafts = new ArrayList < CCRDocumentInstance > ();
      String draftID;
      String savedInstanceName = "";
      try {
        statement = connection.createStatement();
        ResultSet rs = statement.executeQuery(selectStatement);
        while (rs.next()) {
          documentID = rs.getString("documentID");
          draftID = rs.getString("draftID");
          savedInstanceName = rs.getString("name");
          Document draftData = new Document(new File(draftID + ".xml"));
          CCRDocumentInstance draftLetter = new CCRDocumentInstance(draftData, savedInstanceName, documentID, CCRDocumentInstance.Status.DRAFT);
          listOfDrafts.add(draftLetter);
        }
      } catch (SQLException e) {
        log.debug("The error is " + e.getMessage());
      } finally {
        if (statement != null) {
          try {
            statement.close();
          } catch (SQLException e) {
            log.debug("error in closing statement" + e.getMessage());
          }
        }
        if (connection != null) {
          try {
            connection.close();
          } catch (SQLException e) {
            log.debug("error in closing connection" + e.getMessage());
          }
        }
      }

      return listOfDrafts;
    }

Eclipse專案

包含範例實作的eclipse專案可以是 從此處下載

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