<?php
/**
* @package DATA_MySQL5
*/
/**
* This class is the abstraction of a MySQL5 database implementing the
* array access behavior.
*
* Example:
* <code>
* // connect to MySQL
* $DB->connect($server, $user, $pass);
* // select database
* $DB->selectSchema($schema);
* // access a table
* $DB['table']...;
* </code>
*
* @todo Implement table existence check.
*/
class DATA_MySQL5_Database implements ArrayAccess {
/**
* Disables inboxing in this object.
* @var bool
*/
protected $inboxingDisabled;
/**
* Constructor.
*/
public function __construct() {
$this->inboxingDisabled = false;
}
/**
* isset(..) handler. Indicates if table exists in current schema.
* Not implemented yet.
* Will throw {@link DATA_NotImplemented DATA_NotImplemented exception}.
* @param string $offset The table name.
* @return bool True if table exists, false otherwise.
*/
public function offsetExists($offset) {
throw new DATA_NotImplemented("DATA_MySQL5_Database::offsetExists");
}
/**
* [..] handler. Returns a table object corresponding to the array offset.
* Must be a valid table (won't be checked).
* @param string $offset The table name.
* @return DATA_MySQL5_Table The table object.
*/
public function offsetGet($offset) {
$table = new DATA_MySQL5_Table($offset);
if ($this->inboxingDisabled) {
$table = $table->withoutInboxing;
}
return $table;
}
/**
* [..] = handler. Table creation is not available.
* Will throw {@link DATA_ReadOnly DATA_ReadOnly exception}.
*/
public function offsetSet($offset, $value) {
throw new DATA_ReadOnly();
}
/**
* unset(..) handler. Table dropping is not available.
* Will throw {@link DATA_ReadOnly DATA_ReadOnly exception}.
*/
public function offsetUnset($offset) {
throw new DATA_ReadOnly();
}
/**
* Member property overloading.
*
* withoutInboxing property returns a db object with inboxing of
* mysql types disabled.
*
* @param string $propname Property name.
* @return mixed Property value.
*/
public function __get($propname) {
if ($propname == 'withoutInboxing') {
$newDB = clone $this;
$newDB->inboxingDisabled = true;
return $newDB;
}
throw new Exception("Undefined property: {$propname}");
}
/**
* Function call overload. Proxies the calls to the common database
* functions, if present.
* @see DATA_MySQL5_Access
*/
public function __call($methodName, $arguments) {
if (is_callable(array('DATA_MySQL5_Access', $methodName))) {
return call_user_func_array(array('DATA_MySQL5_Access', $methodName), $arguments);
}
}
}
?>
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