SDO_DAS_Relational::__construct
(No version information available, might be only in CVS)
SDO_DAS_Relational::__construct —
Creates an instance of a Relational Data Access Service
Description
SDO_DAS_Relational
SDO_DAS_Relational::__construct
(
array
$database_metadata
[,
string
$application_root_type
[,
array
$SDO_containment_references_metadata
]] )
WarningThis function is
EXPERIMENTAL. The behaviour of this function, its name, and
surrounding documentation may change without notice in a future release of PHP.
This function should be used at your own risk.
Constructs an instance of a Relational Data Access Service
from the passed metadata.
Parameters
-
database_metadata
-
An array containing one or more table definitions,
each of which is an associative array containing the keys
name,
columns,
PK, and optionally,
FK.
For a full discussion of the metadata, see the
metadata
section in the general information about the Relational DAS.
-
application_root_type
-
The root of each data graph is an object of a special root type and
the application data objects come below that.
Of the various application types in the SDO model,
one has to be the the application type immediately
below the root of the data graph.
If there is only one table in the database metadata,
so the application root type can be inferred, this argument can be omitted.
-
SDO_containment_references_metadata
-
An array containing one or more definitions of a containment relation,
each of which is an associative array containing the keys
parent
and
child.
The containment relations describe how the types in the model
are connected to form a tree.
The type specified as the application root type must be present
as one of the parent types in the containment references.
If the application only needs to work with one table at a time,
and there are no containment relations in the model,
this argument can be omitted.
For a full discussion of the metadata, see the
metadata
section in the general information about the Relational DAS.
Return Values
Returns an SDO_DAS_Relational object on success.
Errors/Exceptions
SDO_DAS_Relational::__construct()
throws a SDO_DAS_Relational_Exception if
any problems are found in the metadata.
Examples
For a full discussion of the metadata, see the
metadata
section in the general information about the Relational DAS.
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