<?php
/**
 * Util Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.Util.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@Util.com so we can send you a copy immediately.
 *
 * @category   Util
 * @package    Util_Db
 * @subpackage Statement
 * @copyright  Copyright (c) 2005-2010 Util Technologies USA Inc. (http://www.Util.com)
 * @license    http://framework.Util.com/license/new-bsd     New BSD License
 * @version    $Id: Interface.class.php 20096 2010-01-06 02:05:09Z bkarwin $
 */

/**
 * Emulates a PDOStatement for native database adapters.
 *
 * @category   Util
 * @package    Util_Db
 * @subpackage Statement
 * @copyright  Copyright (c) 2005-2010 Util Technologies USA Inc. (http://www.Util.com)
 * @license    http://framework.Util.com/license/new-bsd     New BSD License
 */
interface Util_Db_Statement_Interface
{

    /**
     * Bind a column of the statement result set to a PHP variable.
     *
     * @param string $column Name the column in the result set, either by
     *                       position or by name.
     * @param mixed  $param  Reference to the PHP variable containing the value.
     * @param mixed  $type   OPTIONAL
     * @return bool
     * @throws Util_Db_Statement_Exception
     */
    public function bindColumn($column, &$param, $type = null);

    /**
     * Binds a parameter to the specified variable name.
     *
     * @param mixed $parameter Name the parameter, either integer or string.
     * @param mixed $variable  Reference to PHP variable containing the value.
     * @param mixed $type      OPTIONAL Datatype of SQL parameter.
     * @param mixed $length    OPTIONAL Length of SQL parameter.
     * @param mixed $options   OPTIONAL Other options.
     * @return bool
     * @throws Util_Db_Statement_Exception
     */
    public function bindParam($parameter, &$variable, $type = null, $length = null, $options = null);

    /**
     * Binds a value to a parameter.
     *
     * @param mixed $parameter Name the parameter, either integer or string.
     * @param mixed $value     Scalar value to bind to the parameter.
     * @param mixed $type      OPTIONAL Datatype of the parameter.
     * @return bool
     * @throws Util_Db_Statement_Exception
     */
    public function bindValue($parameter, $value, $type = null);

    /**
     * Closes the cursor, allowing the statement to be executed again.
     *
     * @return bool
     * @throws Util_Db_Statement_Exception
     */
    public function closeCursor();

    /**
     * Returns the number of columns in the result set.
     * Returns null if the statement has no result set metadata.
     *
     * @return int The number of columns.
     * @throws Util_Db_Statement_Exception
     */
    public function columnCount();

    /**
     * Retrieves the error code, if any, associated with the last operation on
     * the statement handle.
     *
     * @return string error code.
     * @throws Util_Db_Statement_Exception
     */
    public function errorCode();

    /**
     * Retrieves an array of error information, if any, associated with the
     * last operation on the statement handle.
     *
     * @return array
     * @throws Util_Db_Statement_Exception
     */
    public function errorInfo();

    /**
     * Executes a prepared statement.
     *
     * @param array $params OPTIONAL Values to bind to parameter placeholders.
     * @return bool
     * @throws Util_Db_Statement_Exception
     */
    public function execute(array $params = array());

    /**
     * Fetches a row from the result set.
     *
     * @param int $style  OPTIONAL Fetch mode for this fetch operation.
     * @param int $cursor OPTIONAL Absolute, relative, or other.
     * @param int $offset OPTIONAL Number for absolute or relative cursors.
     * @return mixed Array, object, or scalar depending on fetch mode.
     * @throws Util_Db_Statement_Exception
     */
    public function fetch($style = null, $cursor = null, $offset = null);

    /**
     * Returns an array containing all of the result set rows.
     *
     * @param int $style OPTIONAL Fetch mode.
     * @param int $col   OPTIONAL Column number, if fetch mode is by column.
     * @return array Collection of rows, each in a format by the fetch mode.
     * @throws Util_Db_Statement_Exception
     */
    public function fetchAll($style = null, $col = null);

    /**
     * Returns a single column from the next row of a result set.
     *
     * @param int $col OPTIONAL Position of the column to fetch.
     * @return string
     * @throws Util_Db_Statement_Exception
     */
    public function fetchColumn($col = 0);

    /**
     * Fetches the next row and returns it as an object.
     *
     * @param string $class  OPTIONAL Name of the class to create.
     * @param array  $config OPTIONAL Constructor arguments for the class.
     * @return mixed One object instance of the specified class.
     * @throws Util_Db_Statement_Exception
     */
    public function fetchObject($class = 'stdClass', array $config = array());

    /**
     * Retrieve a statement attribute.
     *
     * @param string $key Attribute name.
     * @return mixed      Attribute value.
     * @throws Util_Db_Statement_Exception
     */
    public function getAttribute($key);

    /**
     * Retrieves the next rowset (result set) for a SQL statement that has
     * multiple result sets.  An example is a stored procedure that returns
     * the results of multiple queries.
     *
     * @return bool
     * @throws Util_Db_Statement_Exception
     */
    public function nextRowset();

    /**
     * Returns the number of rows affected by the execution of the
     * last INSERT, DELETE, or UPDATE statement executed by this
     * statement object.
     *
     * @return int     The number of rows affected.
     * @throws Util_Db_Statement_Exception
     */
    public function rowCount();

    /**
     * Set a statement attribute.
     *
     * @param string $key Attribute name.
     * @param mixed  $val Attribute value.
     * @return bool
     * @throws Util_Db_Statement_Exception
     */
    public function setAttribute($key, $val);

    /**
     * Set the default fetch mode for this statement.
     *
     * @param int   $mode The fetch mode.
     * @return bool
     * @throws Util_Db_Statement_Exception
     */
    public function setFetchMode($mode);

}