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<?php
# ***** BEGIN LICENSE BLOCK *****
# This file is part of Clearbricks.
# Copyright (c) 2007 Olivier Meunier and contributors. All rights
# reserved.
#
# Clearbricks is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# Clearbricks is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Clearbricks; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# ***** END LICENSE BLOCK *****
interface i_dbSchema
{
/**
This method should return an array of all tables in database for the current
connection.
@return <b>array</b>
*/
function db_get_tables();
/**
This method should return an associative array of columns in given table
<var>$table</var> with column names in keys. Each line value is an array
with following values:
- [type] data type (string)
- [len] data length (integer or null)
- [null] is null? (boolean)
- [default] default value (string)
@param table <b>string</b> Table name
@return <b>array</b>
*/
function db_get_columns($table);
/**
This method should return an array of keys in given table
<var>$table</var>. Each line value is an array with following values:
- [name] index name (string)
- [primary] primary key (boolean)
- [unique] unique key (boolean)
- [cols] columns (array)
@param table <b>string</b> Table name
@return <b>array</b>
*/
function db_get_keys($table);
/**
This method should return an array of indexes in given table
<var>$table</var>. Each line value is an array with following values:
- [name] index name (string)
- [type] index type (string)
- [cols] columns (array)
@param table <b>string</b> Table name
@return <b>array</b>
*/
function db_get_indexes($table);
/**
This method should return an array of foreign keys in given table
<var>$table</var>. Each line value is an array with following values:
- [name] key name (string)
- [c_cols] child columns (array)
- [p_table] parent table (string)
- [p_cols] parent columns (array)
- [update] on update statement (string)
- [delete] on delete statement (string)
@param table <b>string</b> Table name
@return <b>array</b>
*/
function db_get_references($table);
function db_create_table($name,$fields);
function db_create_field($table,$name,$type,$len,$null,$default);
function db_create_primary($table,$name,$cols);
function db_create_unique($table,$name,$cols);
function db_create_index($table,$name,$type,$cols);
function db_create_reference($name,$c_table,$c_cols,$p_table,$p_cols,$update,$delete);
function db_alter_field($table,$name,$type,$len,$null,$default);
function db_alter_primary($table,$name,$newname,$cols);
function db_alter_unique($table,$name,$newname,$cols);
function db_alter_index($table,$name,$newname,$type,$cols);
function db_alter_reference($name,$newname,$c_table,$c_cols,$p_table,$p_cols,$update,$delete);
}
class dbSchema
{
protected $con;
public function __construct(&$con)
{
$this->con =& $con;
}
public static function init(&$con)
{
$driver = $con->driver();
$driver_class = $driver.'Schema';
if (!class_exists($driver_class))
{
if (file_exists(dirname(__FILE__).'/class.'.$driver.'.dbschema.php')) {
require dirname(__FILE__).'/class.'.$driver.'.dbschema.php';
} else {
trigger_error('Unable to load DB schema layer for '.$driver,E_USER_ERROR);
exit(1);
}
}
return new $driver_class($con);
}
/**
Database data type to universal data type conversion.
@param type <b>string</b> Type name
@param leng <b>integer</b> Field length (in/out)
@param default <b>string</b> Default field value (in/out)
@return <b>string</b>
*/
public function dbt2udt($type,&$len,&$default)
{
$c = array(
'bool' => 'boolean',
'int2' => 'smallint',
'int' => 'integer',
'int4' => 'integer',
'int8' => 'bigint',
'float4' => 'real',
'double precision' => 'float',
'float8' => 'float',
'decimal' => 'numeric',
'character varying' => 'varchar',
'character' => 'char'
);
if (isset($c[$type])) {
return $c[$type];
}
return $type;
}
/**
Universal data type to database data tye conversion.
@param type <b>string</b> Type name
@param leng <b>integer</b> Field length (in/out)
@param default <b>string</b> Default field value (in/out)
@return <b>string</b>
*/
public function udt2dbt($type,&$len,&$default)
{
return $type;
}
/**
Returns an array of all table names.
@see i_dbSchema::db_get_tables
@return <b>array</b>
*/
public function getTables()
{
return $this->db_get_tables();
}
/**
Returns an array of columns (name and type) of a given table.
@see i_dbSchema::db_get_columns
@param table <b>string</b> Table name
@return <b>array</b>
*/
public function getColumns($table)
{
return $this->db_get_columns($table);
}
/**
Returns an array of index of a given table.
@see i_dbSchema::db_get_keys
@param table <b>string</b> Table name
@return <b>array</b>
*/
public function getKeys($table)
{
return $this->db_get_keys($table);
}
/**
Returns an array of indexes of a given table.
@see i_dbSchema::db_get_index
@param table <b>string</b> Table name
@return <b>array</b>
*/
public function getIndexes($table)
{
return $this->db_get_indexes($table);
}
/**
Returns an array of foreign keys of a given table.
@see i_dbSchema::db_get_references
@param table <b>string</b> Table name
@return <b>array</b>
*/
public function getReferences($table)
{
return $this->db_get_references($table);
}
public function createTable($name,$fields)
{
return $this->db_create_table($name,$fields);
}
public function createField($table,$name,$type,$len,$null,$default)
{
return $this->db_create_field($table,$name,$type,$len,$null,$default);
}
public function createPrimary($table,$name,$cols)
{
return $this->db_create_primary($table,$name,$cols);
}
public function createUnique($table,$name,$cols)
{
return $this->db_create_unique($table,$name,$cols);
}
public function createIndex($table,$name,$type,$cols)
{
return $this->db_create_index($table,$name,$type,$cols);
}
public function createReference($name,$c_table,$c_cols,$p_table,$p_cols,$update,$delete)
{
return $this->db_create_reference($name,$c_table,$c_cols,$p_table,$p_cols,$update,$delete);
}
public function alterField($table,$name,$type,$len,$null,$default)
{
return $this->db_alter_field($table,$name,$type,$len,$null,$default);
}
public function alterPrimary($table,$name,$newname,$cols)
{
return $this->db_alter_primary($table,$name,$newname,$cols);
}
public function alterUnique($table,$name,$newname,$cols)
{
return $this->db_alter_unique($table,$name,$newname,$cols);
}
public function alterIndex($table,$name,$newname,$type,$cols)
{
return $this->db_alter_index($table,$name,$newname,$type,$cols);
}
public function alterReference($name,$newname,$c_table,$c_cols,$p_table,$p_cols,$update,$delete)
{
return $this->db_alter_reference($name,$newname,$c_table,$c_cols,$p_table,$p_cols,$update,$delete);
}
public function flushStack()
{
}
}
?>