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

    sql.append("select * ");
    sql.append("from communities ");
    sql.append("where community_id=? ");
    sql.append("and project_id=? ");


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


    try {
      Configuration.getConnectionPool().executeQuery(qp);
    } catch (SQLException e) {
      Logger.fatal("Couldn't execute query", e);
      throw new NoSuchCommunityException("A SQLException was the cause: "
          + e.getMessage());
    }


    if (qp.getResultCount() > 0) {
      return createObjectFromQueryParser(Community.class, qp);
    } else {
      throw new NoSuchCommunityException("The requested community ID ("
          + communityId + ") doesn't exist.");
    }

View Full Code Here

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


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


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


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

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    sql.append("update communities ");
    sql.append("set active=?, status=?, expires=? ");
    sql.append("where community_id=? ");
    sql.append("and project_id=? ");


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


    try {
      if (!Configuration.getConnectionPool().executeInsertOrUpdate(qp)) {
        throw new NoSuchCommunityException("Community "
            + community.getId() + " in project "

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    sql.append("and community_id not in ");
    sql.append(" (select community_id ");
    sql.append("  from item2community ");
    sql.append("  where community_id=?) ");


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


    try {
      if (!Configuration.getConnectionPool().executeInsertOrUpdate(qp)) {
        throw new NoSuchCommunityException("Childless community "
            + community.getId() + " in project "

View Full Code Here

   */
  private int getNextCommunityId() throws NoSuchCommunityException {
    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(
              "Community ID couldn't be retrieved b/c of SQLException",
              e);

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    sql.append("select count(*) as theCount ");
    sql.append("from community2community ");
    sql.append("where child_id=? ");
    sql.append("and parent_id=? ");


    QueryParser qp = new QueryParser(sql.toString());
    qp.addPreparedStmtElementDefinition(childId);
    qp.addPreparedStmtElementDefinition(parentId);
    if (connection != null) {
      qp.setConnection(connection);
    }


    int preInsertCheck = -1;
    try {
      Configuration.getConnectionPool().executeQuery(qp);
      preInsertCheck = qp.getResult(Integer.class, "theCount");
    } catch (DataTypeMismatchException e) {
      Logger.error("Couldn't create an int out of an integer "
          + "db result.  Shouldn't happen, but...", e);
    }


    if (preInsertCheck == 0) {
      sql = new StringBuffer();
      sql.append("insert into community2community ");
      sql.append("(child_id, parent_id) values (?, ?) ");


      qp.clearForNewSQL();
      qp.setSql(sql.toString());
      qp.addPreparedStmtElementDefinition(childId);
      qp.addPreparedStmtElementDefinition(parentId);


      Configuration.getConnectionPool().executeInsertOrUpdate(qp);
    }
  }

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    StringBuffer sql = new StringBuffer();
    sql.append("select parent_id ");
    sql.append("from community2community ");
    sql.append("where child_id=? ");


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


    Configuration.getConnectionPool().executeQuery(qp);
    return qp.getResults(Integer.class, "parent_id");
  }

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    sql.append("from collections c, collection2collection c2c ");
    sql.append("where ((c.expires is null) or (c.expires>now())) ");
    sql.append("and c.collection_id=c2c.child_id ");
    sql.append("and c2c.parent_id=? ");


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


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

View Full Code Here

    sql.append("and collection_id in ");
    sql.append("   (select collection_id ");
    sql.append("    from collection2community ");
    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 createObjectsFromQueryParser(Collection.class, qp);
      }
    } catch (SQLException e) {

View Full Code Here

    sql.append("select * ");
    sql.append("from collections ");
    sql.append("where collection_id=? ");
    sql.append("and project_id=? ");


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


    try {
      Configuration.getConnectionPool().executeQuery(qp);
    } catch (SQLException e) {
      Logger.fatal("Couldn't execute query", e);
      throw new NoSuchCollectionException(
          "A SQLException was the cause: " + e.getMessage());
    }


    if (qp.getResultCount() > 0) {
      return createObjectFromQueryParser(Collection.class, qp);
    } else {
      throw new NoSuchCollectionException("The requested collection ID ("
          + collectionId + ") doesn't exist.");
    }

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