Release 10.1A: OpenEdge Development:
Java Open Clients

Methods

The ProDataGraphMetaData class provides the following methods.

addTable( )

Adds the specified temp-table schema definition (ProDataObject meta data) to the ProDataGraphMetaData object:

Syntax

void addTable(ProDataObjectMetaData tablemd)

tablemd

Specifies a ProDataObjectMetaData object that defines the schema of a temp-table in a ProDataGraph.

You must call this method to define each required ProDataObject collection before attaching this ProDataGraphMetaData object to the ProDataGraph. Each ProDataObjectMetaData object describes the meta data for ProDataObject instances in a collection that maps to a temp-table in the corresponding Progress 4GL ProDataSet. When you call ProDataGraph.createProDataObject(), a OpenEdge returns a ProDataObject that contains column and type data as described by the corresponding ProDataObjectMetaData object.

addDataRelation( )

Adds the specified data-relation definition to the ProDataGraphMetaData object:

Syntax

void addDataRelation (ProDataRelatonMetaData drmd)

drmd

Specifies a ProDataRelationMetaData object that defines a data-relation for a ProDataGraph.

You can only call this method after you have already called the addTable() method to define the ProDataObject collections that participate in the specified data-relation. You must also call this method to define each required data-relation before attaching this ProDataGraphMetaData object to the ProDataGraph. This method throws an Exception if any table participating in the specified data-relation is not already a member of the ProDataGraphMetaData.

getNumTables( )

Returns the number of ProDataObjectMetaData objects defined in this ProDataGraphMetaData object:

Syntax

int getNumTables()

getTableNames( )

Returns a String array of the table names of the ProDataObjectMetaData objects defined in this ProDataGraphMetaData object:

Syntax

java.lang.String[] getTableNames()

getNumRelations( )

Returns the number of ProDataRelationMetaData objects in this ProDataGraphMetaData object:

Syntax

int getNumRelations()

getTableMetaData( )

Returns the specified ProDataObjectMetaData object in this ProDataGraphMetaData object:

Syntax

ProDataObjectMetaData getTableMetaData(int idx)

idx

Specifies a 0-based index of tables that can also reference an item in the array of table names returned by the getTableNames( ) method up to the limit specified by the getNumTables( ) method.

getRelationMetaData( )

Returns the specified ProDataRelationMetaData object in this ProDataGraphMetaData object:

Syntax

ProDataRelationMetaData getRelationMetaData(int idx)

idx

Specifies a 0-based index of data-relations up to the limit specified by the getNumRelations( ) method.