Examples of edu.uga.galileo.voci.db.QueryParser

edu.uga.galileo.voci.db.QueryParser
A business object used with the executeQuery and executeInsertOrUpdate methods in the ConnectionPoolFactory. The parser is initialized with information on column name and type for data to be retieved from the ResultSet, or, if excluded, it will try to build the element info itself from ResultSet metadata. If necessary, one must also provide definitions for populating the PreparedStatement. The object can then be used to retrieve results by column name as String, int, Date, or boolean types.

The QueryParser can optionally accept a Connection object that will be used by the {@link edu.uga.galileo.voci.db.ConnectionPool} instead of using the pool'sdefault connection handling. This is useful for instances where manipulation of the connection is required prior to making database calls. For example, to allow rollback during failure at any point in a series of database calls, a connection could be retrieved, have its autoCommit set to false, and the query parser could be re-used for repeated calls until the transaction's complete. At that point, getting the connection from the parser and committing is possible, and the connection could then be returned by calling code to the pool. @author Mark Durant @version 1.0

    StringBuffer sql = new StringBuffer();
    sql.append("insert into user_preferences ");
    sql.append("(user_id, name, value) ");
    sql.append("values (?, ?, ?) ");


    QueryParser qp = new QueryParser(sql.toString());
    qp.addPreparedStmtElementDefinition(user.getUserId());
    qp.addPreparedStmtElementDefinition(name);
    qp.addPreparedStmtElementDefinition(value);


    try {
      Configuration.getConnectionPool().executeInsertOrUpdate(qp);
    } catch (SQLException e1) {
      Logger.error("Couldn't insert user preference (" + name + "/"

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    sql.append("delete from user_preferences ");
    sql.append("where user_id=? ");
    sql.append("and name=? ");


    QueryParser qp = new QueryParser(sql.toString());
    qp.addPreparedStmtElementDefinition(user.getUserId());
    qp.addPreparedStmtElementDefinition(name);


    try {
      Configuration.getConnectionPool().executeInsertOrUpdate(qp);
    } catch (SQLException e1) {
      Logger.error("Couldn't delete user preference (" + name + ")", e1);

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    sql.append("select name, value ");
    sql.append("from user_preferences ");
    sql.append("where user_id=? ");


    QueryParser qp = new QueryParser(sql.toString());
    qp.addPreparedStmtElementDefinition(user.getUserId());


    try {
      Configuration.getConnectionPool().executeQuery(qp);
      if (qp.getResultCount() == 0) {
        return null;
      }


      ArrayList row;
      for (int m = 0; m < qp.getResultCount(); m++) {
        row = qp.getRowResults(m);
        results.put((String) row.get(0), (String) row.get(1));
      }
    } catch (SQLException e1) {
      Logger.error("Couldn't get user preferences (" + user.getUserName()
          + ")", e1);

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    sql.append("       from projects ");
    sql.append("       where handle=?) ");
    sql.append("   ) ");
    sql.append("order by user_name asc ");
  
    QueryParser qp = new QueryParser(sql.toString());
    qp.addPreparedStmtElementDefinition(projectHandle);


    try {
      Configuration.getConnectionPool().executeQuery(qp);
      if (qp.getResultCount() == 0) {
        return null;
      }


      return createObjectsFromQueryParser(User.class, qp);
    } catch (SQLException e1) {

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    sql.append("and item_id in ");
    sql.append("   (select item_id ");
    sql.append("    from item2community ");
    sql.append("    where community_id=?) ");


    QueryParser qp = new QueryParser(sql.toString());
    qp.addPreparedStmtElementDefinition(projectId);
    qp.addPreparedStmtElementDefinition(community.getCommunityId());


    try {
      Configuration.getConnectionPool().executeQuery(qp);
      if (qp.getResultCount() == 0) {
        return null;
      } else {
        return createItemsFromQueryParser(qp);
      }
    } catch (SQLException e) {

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    sql.append("and item_id in ");
    sql.append("   (select item_id ");
    sql.append("    from item2collection ");
    sql.append("    where collection_id=?) ");


    QueryParser qp = new QueryParser(sql.toString());
    qp.addPreparedStmtElementDefinition(projectId);
    qp.addPreparedStmtElementDefinition(collection.getCollectionId());


    try {
      Configuration.getConnectionPool().executeQuery(qp);
      if (qp.getResultCount() == 0) {
        return null;
      } else {
        return createItemsFromQueryParser(qp);
      }
    } catch (SQLException e) {

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    sql.append("and item_id in ");
    sql.append("   (select item_id ");
    sql.append("    from item2bundle ");
    sql.append("    where bundle_id=?) ");


    QueryParser qp = new QueryParser(sql.toString());
    qp.addPreparedStmtElementDefinition(projectId);
    qp.addPreparedStmtElementDefinition(bundle.getBundleId());


    try {
      Configuration.getConnectionPool().executeQuery(qp);
      if (qp.getResultCount() == 0) {
        return null;
      } else {
        return createItemsFromQueryParser(qp);
      }
    } catch (SQLException e) {

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    sql.append("   active, status ");
    sql.append("from items ");
    sql.append("where item_id=? ");
    sql.append("and project_id=? ");


    QueryParser qp = new QueryParser(sql.toString());
    qp.addPreparedStmtElementDefinition(itemId);
    qp.addPreparedStmtElementDefinition(projectId);


    try {
      Configuration.getConnectionPool().executeQuery(qp);
      if (qp.getResultCount() > 0) {
        return createItemsFromQueryParser(qp).get(0);
      }
    } catch (SQLException e) {
      Logger.fatal("Couldn't execute query", e);
      throw new NoSuchItemException("A SQLException was the cause: "

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    sql.append("insert into items ");
    sql.append("(item_id, project_id, active, ");
    sql.append("status, created, expires) values ");
    sql.append("(?, ?, ?, ?, now(), ?) ");


    QueryParser qp = new QueryParser(sql.toString());
    qp.addPreparedStmtElementDefinition(item.getItemId());
    qp.addPreparedStmtElementDefinition(item.getProjectId());
    qp.addPreparedStmtElementDefinition(item.isActive());
    qp.addPreparedStmtElementDefinition(QueryParserElement.INT, item
        .getStatus() <= 0 ? null : item.getStatus());
    qp.addPreparedStmtElementDefinition(QueryParserElement.TIMESTAMP, item
        .getExpires());


    if (connection != null) {
      qp.setConnection(connection);
    }


    try {
      Configuration.getConnectionPool().executeInsertOrUpdate(qp);
    } catch (SQLException e) {

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   */
  private int getNextItemId() throws NoSuchItemException {
    StringBuffer sql = new StringBuffer();
    sql.append("select nextval('handle_id_seq') as nextVal ");


    QueryParser qp = new QueryParser(sql.toString());


    try {
      Configuration.getConnectionPool().executeQuery(qp);
      return qp.getResult(Integer.class, "nextVal");
    } catch (SQLException e) {
      Logger
          .error("Item ID couldn't be retrieved b/c of SQLException",
              e);
      throw new NoSuchItemException(

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edu.uga.galileo.voci.db.dao.PSQLAuditLogDAO

edu.uga.galileo.voci.db.dao.PSQLBundleDAO

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edu.uga.galileo.voci.db.dao.PSQLCommunityDAO

edu.uga.galileo.voci.db.dao.PSQLHelperDAO

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edu.uga.galileo.voci.db.dao.PSQLProjectDAO

edu.uga.galileo.voci.db.dao.PSQLRoleDAO

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