oracle.olapi.metadata.mdm
Class MdmMetadataProvider

java.lang.Object
  |
  +--oracle.olapi.metadata.BaseMetadataProvider
        |
        +--oracle.olapi.metadata.mdm.MdmMetadataProvider

public class MdmMetadataProvider

extends BaseMetadataProvider

implements MetadataProvider

An object that gives access to the metadata for a data store, assuming that the metadata supports the multidimensional model (MDM). For example, MDM is supported by OLAP Catalog metadata. You get an MdmMetadataProvider by calling the getDefaultMetadataProvider method of the ExpressDataProvider you are using.

To discover each MdmObject in the data store, you can perform the following steps, to navigate through the metadata.

1. Call the getRootSchema method to retrieve the root MdmSchema. This is the top-level MdmSchema in what might be a nested arrangement of MdmSchema objects.
2. Call the getMeasureDimension method of the root MdmSchema to get the MdmMeasureDimension, which contains all of the MdmMeasure objects that this MdmMetadataProvider provides.
3. Call the getDimensions method of the MdmSchema to retrieve a List of the MdmPrimaryDimension objects, except for the MdmMeasureDimension, that the MdmSchema contains.
4. Call the getHierarchies method of each MdmPrimaryDimension objects returned by the getDimensions method to get the MdmHierarchy objects that the MdmPrimaryDimension contains.
5. For each MdmPrimaryDimension and MdmHierarchy, call its methods for discovering related objects, such as its MdmAttribute objects.
6. Call the getSubSchemas method of the MdmSchema to retrieve a List of the MdmSchema objects that it contains.
7. On each subschema, call its getDimensions, getMeasures, and getSchemas methods to discover the objects that it contains.
8. For each MdmMeasure, call the getDimensions method to discover its MdmPrimaryDimension objects.

When an application references metadata through an MdmMetadataProvider, Oracle OLAP retrieves information about the metadata and caches that information using the resources of the application. If the metadata in the data store changes, either through changes made in the OLAP Catalog by a database administrator or by your application, then the cached information becomes obsolete. An application can call the update method to refresh the cached metadata. Optionally, after calling update, the application can call the flushDeletedObjects method to free the resources related to any deleted objects. Use the update and flushDeletedObjects methods if your applications has changed MdmObject objects that might be cached, or if a database administrator might change the data store.

getMetadataObject

public final MdmObject getMetadataObject(java.lang.String id)
                                  throws ObjectClosedException

Gets the MdmObject that has the specified identifier.

Parameters:

id - A String that uniquely identifies the MdmMetadataObject to be returned.

Returns:

The requested MdmObject.

getMetadataObjects

public final java.util.List getMetadataObjects(java.lang.String[] ids)
                                        throws ObjectClosedException

Gets a List in which each element is an MdmObject that has one of the specified identifiers.

Parameters:

id - An array of String objects, each of which uniquely identifies an MdmObject to be returned.

Returns:

A List that contains an MdmObject for each of the specified identifiers.

getRootSchema

public MdmSchema getRootSchema()

Gets the top-level MdmSchema in the data store to which this MdmMetadataProvider gives access.

Returns:

The top-level MdmSchema in the data store.

getMdmCustomObjectFactory

public final MdmCustomObjectFactory getMdmCustomObjectFactory()

Gets an MdmCustomObjectFactory, which you can use to create custom objects, such as an MdmMeasure or MdmDimension, for this MdmMetadataProvider.

Returns:

An MdmCustomObjectFactory for this MdmMetadataProvider.

getMtmCustomObjectFactory

public final MtmCustomObjectFactory getMtmCustomObjectFactory()

Gets an MtmCustomObjectFactory, which you can use to create custom objects such as an MtmBaseCube or an MtmSolveSpecification for this MdmMetadataProvider.

Returns:

An MtmCustomObjectFactory for this MdmMetadataProvider.