feedbackdaoimpl.java

blog 系 统 （基 于 java ）

			int rows = stmt.executeUpdate();
			long t2 = System.currentTimeMillis();
			System.out.println( rows + " rows affected (" + (t2-t1) + " ms)" );
		}
		catch (SQLException _e) {
			_e.printStackTrace();
			throw new FeedbackDaoException( "SQLException: " + _e.getMessage(), _e );
		}
		catch (Exception _e) {
			_e.printStackTrace();
			throw new FeedbackDaoException( "Exception: " + _e.getMessage(), _e );
		}
		finally {
			ResourceManager.close(stmt);
			if (!isConnSupplied) {
				ResourceManager.close(conn);
			}
		
		}
		
	}

	/** 
	 * Returns the rows from the Feedback table that matches the specified primary-key value.
	 */
	public Feedback findByPrimaryKey(FeedbackPk pk) throws FeedbackDaoException
	{
		return findByPrimaryKey( pk.getArticleID() );
	}

	/** 
	 * Returns all rows from the Feedback table that match the criteria ''.
	 */
	public Feedback[] findAll() throws FeedbackDaoException
	{
		return findByDynamicSelect( SQL_SELECT + " ORDER BY ArticleID", null );
	}

	/** 
	 * Returns all rows from the Feedback table that match the criteria 'ArticleID = :articleID'.
	 */
	public Feedback findByPrimaryKey(int articleID) throws FeedbackDaoException
	{
		Feedback ret[] = findByDynamicSelect( SQL_SELECT + " WHERE ArticleID = ?", new Object[] {  new Integer(articleID) } );
		return ret.length==0 ? null : ret[0];
	}

	/** 
	 * Returns all rows from the Feedback table that match the criteria 'ArticleID = :articleID'.
	 */
	public Feedback[] findByArticle(int articleID) throws FeedbackDaoException
	{
		return findByDynamicSelect( SQL_SELECT + " WHERE ArticleID = ?", new Object[] {  new Integer(articleID) } );
	}

	/** 
	 * Returns all rows from the Feedback table that match the criteria 'ArticleID = :articleID'.
	 */
	public Feedback[] findWhereArticleIDEquals(int articleID) throws FeedbackDaoException
	{
		return findByDynamicSelect( SQL_SELECT + " WHERE ArticleID = ? ORDER BY ArticleID", new Object[] {  new Integer(articleID) } );
	}

	/** 
	 * Returns all rows from the Feedback table that match the criteria 'FeedBackID = :feedBackID'.
	 */
	public Feedback[] findWhereFeedBackIDEquals(int feedBackID) throws FeedbackDaoException
	{
		return findByDynamicSelect( SQL_SELECT + " WHERE FeedBackID = ? ORDER BY FeedBackID", new Object[] {  new Integer(feedBackID) } );
	}

	/** 
	 * Returns all rows from the Feedback table that match the criteria 'Subject = :subject'.
	 */
	public Feedback[] findWhereSubjectEquals(String subject) throws FeedbackDaoException
	{
		return findByDynamicSelect( SQL_SELECT + " WHERE Subject = ? ORDER BY Subject", new Object[] { subject } );
	}

	/** 
	 * Returns all rows from the Feedback table that match the criteria 'Content = :content'.
	 */
	public Feedback[] findWhereContentEquals(String content) throws FeedbackDaoException
	{
		return findByDynamicSelect( SQL_SELECT + " WHERE Content = ? ORDER BY Content", new Object[] { content } );
	}

	/**
	 * Method 'FeedbackDaoImpl'
	 * 
	 */
	public FeedbackDaoImpl()
	{
	}

	/**
	 * Method 'FeedbackDaoImpl'
	 * 
	 * @param userConn
	 */
	public FeedbackDaoImpl(final java.sql.Connection userConn)
	{
		this.userConn = userConn;
	}

	/** 
	 * Sets the value of maxRows
	 */
	public void setMaxRows(int maxRows)
	{
		this.maxRows = maxRows;
	}

	/** 
	 * Gets the value of maxRows
	 */
	public int getMaxRows()
	{
		return maxRows;
	}

	/**
	 * Method 'getTableName'
	 * 
	 * @return String
	 */
	public String getTableName()
	{
		return "MyBlog..Feedback";
	}

	/** 
	 * Fetches a single row from the result set
	 */
	protected Feedback fetchSingleResult(ResultSet rs) throws SQLException
	{
		if (rs.next()) {
			Feedback dto = new Feedback();
			populateDto( dto, rs);
			return dto;
		} else {
			return null;
		}
		
	}

	/** 
	 * Fetches multiple rows from the result set
	 */
	protected Feedback[] fetchMultiResults(ResultSet rs) throws SQLException
	{
		Collection resultList = new ArrayList();
		while (rs.next()) {
			Feedback dto = new Feedback();
			populateDto( dto, rs);
			resultList.add( dto );
		}
		
		Feedback ret[] = new Feedback[ resultList.size() ];
		resultList.toArray( ret );
		return ret;
	}

	/** 
	 * Populates a DTO with data from a ResultSet
	 */
	protected void populateDto(Feedback dto, ResultSet rs) throws SQLException
	{
		dto.setArticleID( rs.getInt( COLUMN_ARTICLE_I_D ) );
		dto.setFeedBackID( rs.getInt( COLUMN_FEED_BACK_I_D ) );
		if (rs.wasNull()) {
			dto.setFeedBackIDNull( true );
		}
		
		dto.setSubject( rs.getString( COLUMN_SUBJECT ) );
		dto.setContent( rs.getString( COLUMN_CONTENT ) );
	}

	/** 
	 * Returns all rows from the Feedback table that match the specified arbitrary SQL statement
	 */
	public Feedback[] findByDynamicSelect(String sql, Object[] sqlParams) throws FeedbackDaoException
	{
		// declare variables
		final boolean isConnSupplied = (userConn != null);
		Connection conn = null;
		PreparedStatement stmt = null;
		ResultSet rs = null;
		
		try {
			// get the user-specified connection or get a connection from the ResourceManager
			conn = isConnSupplied ? userConn : ResourceManager.getConnection();
		
			// construct the SQL statement
			final String SQL = sql;
		
		
			System.out.println( "Executing " + SQL );
			// prepare statement
			stmt = conn.prepareStatement( SQL );
			stmt.setMaxRows( maxRows );
		
			// bind parameters
			for (int i=0; sqlParams!=null && i<sqlParams.length; i++ ) {
				stmt.setObject( i+1, sqlParams[i] );
			}
		
		
			rs = stmt.executeQuery();
		
			// fetch the results
			return fetchMultiResults(rs);
		}
		catch (SQLException _e) {
			_e.printStackTrace();
			throw new FeedbackDaoException( "SQLException: " + _e.getMessage(), _e );
		}
		catch (Exception _e) {
			_e.printStackTrace();
			throw new FeedbackDaoException( "Exception: " + _e.getMessage(), _e );
		}
		finally {
			ResourceManager.close(rs);
			ResourceManager.close(stmt);
			if (!isConnSupplied) {
				ResourceManager.close(conn);
			}
		
		}
		
	}

	/** 
	 * Returns all rows from the Feedback table that match the specified arbitrary SQL statement
	 */
	public Feedback[] findByDynamicWhere(String sql, Object[] sqlParams) throws FeedbackDaoException
	{
		// declare variables
		final boolean isConnSupplied = (userConn != null);
		Connection conn = null;
		PreparedStatement stmt = null;
		ResultSet rs = null;
		
		try {
			// get the user-specified connection or get a connection from the ResourceManager
			conn = isConnSupplied ? userConn : ResourceManager.getConnection();
		
			// construct the SQL statement
			final String SQL = SQL_SELECT + " WHERE " + sql;
		
		
			System.out.println( "Executing " + SQL );
			// prepare statement
			stmt = conn.prepareStatement( SQL );
			stmt.setMaxRows( maxRows );
		
			// bind parameters
			for (int i=0; sqlParams!=null && i<sqlParams.length; i++ ) {
				stmt.setObject( i+1, sqlParams[i] );
			}
		
		
			rs = stmt.executeQuery();
		
			// fetch the results
			return fetchMultiResults(rs);
		}
		catch (SQLException _e) {
			_e.printStackTrace();
			throw new FeedbackDaoException( "SQLException: " + _e.getMessage(), _e );
		}
		catch (Exception _e) {
			_e.printStackTrace();
			throw new FeedbackDaoException( "Exception: " + _e.getMessage(), _e );
		}
		finally {
			ResourceManager.close(rs);
			ResourceManager.close(stmt);
			if (!isConnSupplied) {
				ResourceManager.close(conn);
			}
		
		}
		
	}

}