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| <?php
/**
* AdoDB layer for DBO.
*
* PHP versions 4 and 5
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright 2005-2009, Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright 2005-2009, Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @package datasources
* @subpackage datasources.models.datasources.dbo
* @since CakePHP Datasources v 0.1
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
*/
//App::import('Datasource','DboSource');
App::uses('DboSource', 'Model/Datasource');
/**
* Include AdoDB files.
*/
App::import('Vendor', 'NewADOConnection', array('file' => 'adodb' . DS . 'adodb.inc.php'));
/**
* AdoDB DBO implementation.
*
* Database abstraction implementation for the AdoDB library.
*
* @package cake
* @subpackage cake.cake.libs.model.datasources.dbo
*/
class DboAdodb extends DboSource {
/**
* Enter description here...
*
* @var string
*/
var $description = "ADOdb DBO Driver";
/**
* ADOConnection object with which we connect.
*
* @var ADOConnection The connection object.
* @access private
*/
var $_adodb = null;
/**
* Array translating ADOdb column MetaTypes to cake-supported metatypes
*
* @var array
* @access private
*/
var $_adodbColumnTypes = array(
'string' => 'C',
'text' => 'X',
'date' => 'D',
'timestamp' => 'T',
'time' => 'T',
'datetime' => 'T',
'boolean' => 'L',
'float' => 'N',
'integer' => 'I',
'binary' => 'R',
);
/**
* ADOdb column definition
*
* @var array
*/
var $columns = array(
'primary_key' => array('name' => 'R', 'limit' => 11),
'string' => array('name' => 'C', 'limit' => '255'),
'text' => array('name' => 'X'),
'integer' => array('name' => 'I', 'limit' => '11', 'formatter' => 'intval'),
'float' => array('name' => 'N', 'formatter' => 'floatval'),
'timestamp' => array('name' => 'T', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
'time' => array('name' => 'T', 'format' => 'H:i:s', 'formatter' => 'date'),
'datetime' => array('name' => 'T', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
'date' => array('name' => 'D', 'format' => 'Y-m-d', 'formatter' => 'date'),
'binary' => array('name' => 'B'),
'boolean' => array('name' => 'L', 'limit' => '1')
);
/**
* Connects to the database using options in the given configuration array.
*
* @param array $config Configuration array for connecting
*/
function connect() {
$config = $this->config;
$persistent = strrpos($config['connect'], '|p');
if ($persistent === false) {
$adodb_driver = $config['connect'];
$connect = 'Connect';
} else {
$adodb_driver = substr($config['connect'], 0, $persistent);
$connect = 'PConnect';
}
if (!$this->enabled()) {
return false;
}
$this->_adodb = NewADOConnection($adodb_driver);
$this->_adodbDataDict = NewDataDictionary($this->_adodb, $adodb_driver);
$this->startQuote = $this->_adodb->nameQuote;
$this->endQuote = $this->_adodb->nameQuote;
$this->connected = $this->_adodb->$connect($config['host'], $config['login'], $config['password'], $config['database']);
$this->_adodbMetatyper = &$this->_adodb->execute('Select 1');
return $this->connected;
}
/**
* Check that AdoDB is available.
*
* @return boolean
*/
function enabled() {
return function_exists('NewADOConnection');
}
/**
* Disconnects from database.
*
* @return boolean True if the database could be disconnected, else false
*/
function disconnect() {
return $this->_adodb->Close();
}
/**
* Executes given SQL statement.
*
* @param string $sql SQL statement
* @return resource Result resource identifier
*/
function _execute($sql, $params = array(), $prepareOptions = array()) {
global $ADODB_FETCH_MODE;
$ADODB_FETCH_MODE = ADODB_FETCH_ASSOC;
return $this->_adodb->execute($sql, $params, $prepareOptions);
}
/**
* Returns a row from current resultset as an array .
*
* @return array The fetched row as an array
*/
function fetchRow($sql = null) {
if (!empty($sql) && is_string($sql) && strlen($sql) > 5) {
if (!$this->execute($sql)) {
return null;
}
}
if (!$this->hasResult()) {
return null;
} else {
$resultRow = $this->_result->FetchRow();
$this->resultSet($resultRow);
return $this->fetchResult();
}
}
/**
* Begin a transaction
*
* @param unknown_type $model
* @return boolean True on success, false on fail
* (i.e. if the database/model does not support transactions).
*/
function begin() {
if (parent::begin()) {
if ($this->_adodb->BeginTrans()) {
$this->_transactionStarted = true;
return true;
}
}
return false;
}
/**
* Commit a transaction
*
* @param unknown_type $model
* @return boolean True on success, false on fail
* (i.e. if the database/model does not support transactions,
* or a transaction has not started).
*/
function commit() {
if (parent::commit()) {
$this->_transactionStarted = false;
return $this->_adodb->CommitTrans();
}
return false;
}
/**
* Rollback a transaction
*
* @param unknown_type $model
* @return boolean True on success, false on fail
* (i.e. if the database/model does not support transactions,
* or a transaction has not started).
*/
function rollback() {
if (parent::rollback()) {
return $this->_adodb->RollbackTrans();
}
return false;
}
/**
* Returns an array of tables in the database. If there are no tables, an error is raised and the application exits.
*
* @return array Array of tablenames in the database
*/
function listSources($data = null) {
$tables = $this->_adodb->MetaTables('TABLES');
if (!count($tables) > 0) {
trigger_error(ERROR_NO_TABLE_LIST, E_USER_NOTICE);
exit;
}
return $tables;
}
/**
* Returns an array of the fields in the table used by the given model.
*
* @param AppModel $model Model object
* @return array Fields in table. Keys are name and type
*/
function describe($model) {
$cache = parent::describe($model);
if ($cache != null) {
return $cache;
}
$fields = false;
$cols = $this->_adodb->MetaColumns($this->fullTableName($model, false));
foreach ($cols as $column) {
$fields[$column->name] = array(
'type' => $this->column($column->type),
'null' => !$column->not_null,
'length' => $column->max_length,
);
if ($column->has_default) {
$fields[$column->name]['default'] = $column->default_value;
}
if ($column->primary_key == 1) {
$fields[$column->name]['key'] = 'primary';
}
}
$this->__cacheDescription($this->fullTableName($model, false), $fields);
return $fields;
}
/**
* Returns a formatted error message from previous database operation.
*
* @return string Error message
*/
function lastError(PDOStatement $query = null) {
return $this->_adodb->ErrorMsg();
}
/**
* Returns number of affected rows in previous database operation, or false if no previous operation exists.
*
* @return integer Number of affected rows
*/
function lastAffected($source = null) {
return $this->_adodb->Affected_Rows();
}
/**
* Returns number of rows in previous resultset, or false if no previous resultset exists.
*
* @return integer Number of rows in resultset
*/
function lastNumRows($source = null) {
return $this->_result ? $this->_result->RecordCount() : false;
}
/**
* Returns the ID generated from the previous INSERT operation.
*
* @return int
*
* @Returns the last autonumbering ID inserted. Returns false if function not supported.
*/
function lastInsertId($source = null) {
return $this->_adodb->Insert_ID();
}
/**
* Returns a LIMIT statement in the correct format for the particular database.
*
* @param integer $limit Limit of results returned
* @param integer $offset Offset from which to start results
* @return string SQL limit/offset statement
* @todo Please change output string to whatever select your database accepts. adodb doesn't allow us to get the correct limit string out of it.
*/
function limit($limit, $offset = null) {
if ($limit) {
$rt = '';
if (!strpos(strtolower($limit), 'limit') || strpos(strtolower($limit), 'limit') === 0) {
$rt = ' LIMIT';
}
if ($offset) {
$rt .= ' ' . $offset . ',';
}
$rt .= ' ' . $limit;
return $rt;
}
return null;
// please change to whatever select your database accepts
// adodb doesn't allow us to get the correct limit string out of it
}
/**
* Converts database-layer column types to basic types
*
* @param string $real Real database-layer column type (i.e. "varchar(255)")
* @return string Abstract column type (i.e. "string")
*/
function column($real) {
$metaTypes = array_flip($this->_adodbColumnTypes);
$interpreted_type = $this->_adodbMetatyper->MetaType($real);
if (!isset($metaTypes[$interpreted_type])) {
return 'text';
}
return $metaTypes[$interpreted_type];
}
/**
* Returns a quoted and escaped string of $data for use in an SQL statement.
*
* @param string $data String to be prepared for use in an SQL statement
* @param string $column_type The type of the column into which this data will be inserted
* @param boolean $safe Whether or not numeric data should be handled automagically if no column data is provided
* @return string Quoted and escaped data
*/
function value($data, $column = null, $safe = false) {
$parent = parent::value($data, $column, $safe);
if ($parent != null) {
return $parent;
}
if ($data === null || (is_array($data) && empty($data))) {
return 'NULL';
}
if ($data === '') {
return "''";
}
return $this->_adodb->qstr($data);
}
/**
* Generates the fields list of an SQL query.
*
* @param Model $model
* @param string $alias Alias tablename
* @param mixed $fields
* @return array
*/
function fields(Model $model, $alias = null, $fields = array(), $quote = true) {
if (empty($alias)) {
$alias = $model->alias;
}
$fields = parent::fields($model, $alias, $fields, false);
if (!$quote) {
return $fields;
}
$count = count($fields);
if ($count >= 1 && $fields[0] != '*' && strpos($fields[0], 'COUNT(*)') === false) {
for ($i = 0; $i < $count; $i++) {
if (!preg_match('/^.+\\(.*\\)/', $fields[$i]) && !preg_match('/\s+AS\s+/', $fields[$i])) {
$prepend = '';
if (strpos($fields[$i], 'DISTINCT') !== false) {
$prepend = 'DISTINCT ';
$fields[$i] = trim(str_replace('DISTINCT', '', $fields[$i]));
}
if (strrpos($fields[$i], '.') === false) {
$fields[$i] = $prepend . $this->name($alias) . '.' . $this->name($fields[$i]) . ' AS ' . $this->name($alias . '__' . $fields[$i]);
} else {
$build = explode('.', $fields[$i]);
$fields[$i] = $prepend . $this->name($build[0]) . '.' . $this->name($build[1]) . ' AS ' . $this->name($build[0] . '__' . $build[1]);
}
}
}
}
return $fields;
}
/**
* Build ResultSets and map data
*
* @param array $results
*/
function resultSet(&$results) {
$num_fields = count($results);
$fields = array_keys($results);
$this->results =& $results;
$this->map = array();
$index = 0;
$j = 0;
while ($j < $num_fields) {
$columnName = $fields[$j];
if (strpos($columnName, '__')) {
$parts = explode('__', $columnName);
$this->map[$index++] = array($parts[0], $parts[1]);
} else {
$this->map[$index++] = array(0, $columnName);
}
$j++;
}
}
/**
* Fetches the next row from the current result set
*
* @return unknown
*/
function fetchResult() {
if (!empty($this->results)) {
$row = $this->results;
$this->results = null;
} else {
$row = $this->_result->FetchRow();
}
if (empty($row)) {
return false;
}
$resultRow = array();
$fields = array_keys($row);
$count = count($fields);
$i = 0;
for ($i = 0; $i < $count; $i++) { //$row as $index => $field) {
list($table, $column) = $this->map[$i];
$resultRow[$table][$column] = $row[$fields[$i]];
}
return $resultRow;
}
/**
* Generate a database-native column schema string
*
* @param array $column An array structured like the following: array('name'=>'value', 'type'=>'value'[, options]),
* where options can be 'default', 'length', or 'key'.
* @return string
*/
function buildColumn($column) {
$name = $type = null;
extract(array_merge(array('null' => true), $column));
if (empty($name) || empty($type)) {
trigger_error('Column name or type not defined in schema', E_USER_WARNING);
return null;
}
//$metaTypes = array_flip($this->_adodbColumnTypes);
if (!isset($this->_adodbColumnTypes[$type])) {
trigger_error("Column type {$type} does not exist", E_USER_WARNING);
return null;
}
$metaType = $this->_adodbColumnTypes[$type];
$concreteType = $this->_adodbDataDict->ActualType($metaType);
$real = $this->columns[$type];
//UUIDs are broken so fix them.
if ($type == 'string' && isset($real['length']) && $real['length'] == 36) {
$concreteType = 'CHAR';
}
$out = $this->name($name) . ' ' . $concreteType;
if (isset($real['limit']) || isset($real['length']) || isset($column['limit']) || isset($column['length'])) {
if (isset($column['length'])) {
$length = $column['length'];
} elseif (isset($column['limit'])) {
$length = $column['limit'];
} elseif (isset($real['length'])) {
$length = $real['length'];
} else {
$length = $real['limit'];
}
$out .= '(' . $length . ')';
}
$_notNull = $_default = $_autoInc = $_constraint = $_unsigned = false;
if (isset($column['key']) && $column['key'] == 'primary' && $type == 'integer') {
$_constraint = '';
$_autoInc = true;
} elseif (isset($column['key']) && $column['key'] == 'primary') {
$_notNull = '';
} elseif (isset($column['default']) && isset($column['null']) && $column['null'] == false) {
$_notNull = true;
$_default = $column['default'];
} elseif ( isset($column['null']) && $column['null'] == true) {
$_notNull = false;
$_default = 'NULL';
}
if (isset($column['default']) && $_default == false) {
$_default = $this->value($column['default']);
}
if (isset($column['null']) && $column['null'] == false) {
$_notNull = true;
}
//use concrete instance of DataDict to make the suffixes for us.
$out .= $this->_adodbDataDict->_CreateSuffix($out, $metaType, $_notNull, $_default, $_autoInc, $_constraint, $_unsigned);
return $out;
}
/**
* Checks if the result is valid
*
* @return boolean True if the result is valid, else false
*/
function hasResult() {
return is_object($this->_result) && !$this->_result->EOF;
}
} |
