xml_database_importer Class Reference

XML format importer class (uses SAX for speed and low memory footprint). More...

Inheritance diagram for xml_database_importer:

Public Member Functions
	begin_database_import ($version, $timestamp)
	Callback function. More...
	begin_table_import ($tablename, $schemaHash)
	Callback function. More...
	finish_database_import ()
	Callback function. More...
	finish_table_import ($tablename)
	Callback function. More...
	import_database ()
	Common import method. More...
	import_table_data ($tablename, $data)
	Callback function. More...
	set_transaction_mode ($mode)
	How to use transactions during the import. More...

Protected Member Functions
	cdata ($parser, $data)
	Callback function. More...
	get_parser ()
	Creates and setups a SAX parser. More...
	tag_close ($parser, $tag)
	Callback function. More...
	tag_open ($parser, $tag, $attributes)
	Callback function. More...

Protected Attributes
bool	$check_schema
	Boolean flag - whether or not to check that XML database schema matches the RDBMS database schema before importing (used by. More...
	$current_data
	$current_data_is_null
	$current_field
	$current_row
	$current_table
database_manager	$manager
	Database manager of the target database (a. More...
moodle_database	$mdb
	Connection to the target database (a. More...
xmldb_structure	$schema
	Target database schema in XMLDB format (a. More...
moodle_transaction	$transaction
	Transaction object.
string	$transactionmode = 'allinone'
	How to use transactions.

Detailed Description

XML format importer class (uses SAX for speed and low memory footprint).

Provides logic for parsing XML data and calling appropriate callbacks. Subclasses should define XML data sources.

Member Function Documentation

begin_database_import()

database_importer::begin_database_import (   $version,   $timestamp  )

inherited

Callback function.

Should be called only once database per import operation, before any database changes are made. It will check the database schema if

See also

check_schema is true

Exceptions

dbtransfer_exception

if any checking (e.g. database schema, Moodle version) fails

Parameters

float	$version	the version of the system which generated the data
string	$timestamp	the timestamp of the data (in ISO 8601) format.

Return values

void

begin_table_import()

database_importer::begin_table_import (   $tablename,   $schemaHash  )

inherited

Callback function.

Should be called only once per table import operation, before any table changes are made. It will delete all table data.

Exceptions

dbtransfer_exception	an unknown table import is attempted
ddl_table_missing_exception	if the table is missing

Parameters

string	$tablename	- the name of the table that will be imported
string	$schemaHash	- the hash of the xmldb_table schema of the table

Return values

void

cdata()

xml_database_importer::cdata (   $parser,   $data  )

protected

Callback function.

Called by the XML parser for character data processing.

Parameters

resource	$parser	XML parser resource.
string	$data	character data to be processed

Return values

void

finish_database_import()

database_importer::finish_database_import ( )

inherited

Callback function.

Should be called only once database per import operation, after all database changes are made. It will commit changes.

Return values

void

finish_table_import()

database_importer::finish_table_import (   $tablename )

inherited

Callback function.

Should be called only once per table import operation, after all table changes are made. It will reset table sequences if any.

Parameters

string

$tablename

Return values

void

get_parser()

xml_database_importer::get_parser ( )

protected

Creates and setups a SAX parser.

Subclasses should use this method to create the XML parser.

Return values

resource

XML parser resource.

import_database()

database_importer::import_database ( )

inherited

Common import method.

Return values

void

Reimplemented in string_xml_database_importer, and file_xml_database_importer.

import_table_data()

database_importer::import_table_data (   $tablename,   $data  )

inherited

Callback function.

Should be called only once per record import operation, only between

See also

begin_table_import and

finish_table_import calls. It will insert table data.

Exceptions

dml_exception

if data insert operation failed

Parameters

string	$tablename	- the name of the table in which data will be imported
object	$data	- data object (fields and values will be inserted into table)

Return values

void

set_transaction_mode()

database_importer::set_transaction_mode (   $mode )

inherited

How to use transactions during the import.

Parameters

string

$mode

'pertable', 'allinone' or 'none'.

tag_close()

xml_database_importer::tag_close (   $parser,   $tag  )

protected

Callback function.

Called by the XML parser for closing tags processing.

Parameters

resource	$parser	XML parser resource.
string	$tag	name of opening tag

Return values

void

tag_open()

xml_database_importer::tag_open (   $parser,   $tag,   $attributes  )

protected

Callback function.

Called by the XML parser for opening tags processing.

Parameters

resource	$parser	XML parser resource.
string	$tag	name of opening tag
array	$attributes	set of opening tag XML attributes

Return values

void

Member Data Documentation

$check_schema

bool database_importer::$check_schema

protectedinherited

Boolean flag - whether or not to check that XML database schema matches the RDBMS database schema before importing (used by.

See also

begin_database_import).

$manager

database_manager database_importer::$manager

protectedinherited

Database manager of the target database (a.

See also

database_manager object).

$mdb

moodle_database database_importer::$mdb

protectedinherited

Connection to the target database (a.

See also

moodle_database object).

$schema

xmldb_structure database_importer::$schema

protectedinherited

Target database schema in XMLDB format (a.

See also

xmldb_structure object).

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The documentation for this class was generated from the following file:

• lib/dtl/xml_database_importer.php