Field Detail

• protected final String sql

• protected Statement statement

Constructor Detail

• protected AbstractQueryCommand(String sql)

Method Detail

• protected final void closeResources()

  After performing the execute operation and making use of its return, it's necessary to free the resources allocated for the statement.

• protected final void closeResources(ResultSet rs)

  After performing the execute operation and making use of its return, it's necessary to free the resources allocated for the statement.

  Parameters:

  rs - allows the caller to conveniently close its resource as well

• protected final ResultSet execute()

  Execute the command that's defined by the subclass following the Command pattern. Specialized parameters are held in the command instances.

  throws:

  SQLException if a database error occurs

  Returns:

  ResultSet from executing a query

• protected int getMaxRows()

  Get the maximum number of rows to return in the ResultSet

  Returns:

  the maximum number of rows

• protected abstract ResultSet runQuery(Connection connection)

  Perform the query. Must set statement field so that the main (execute()) method can clean up. This is the method that encloses the variant part of the code.

  throws:

  SQLException if a database error occurs

  Parameters:

  connection - the connection to use

  Returns:

  ResultSet from an executeQuery method.

• protected void setMaxRows(int maxRows)

  Set the maximum number of rows to return in the ResultSet

  Parameters:

  maxRows - the maximum number of rows