net.ontopia.topicmaps.db2tm
Interface DataSourceIF

All Known Implementing Classes:

CSVDataSource, JDBCDataSource

public interface DataSourceIF

INTERNAL: A data source interface. This interface is used to represent a data source that is capable of returning a stream of tuples for a limited number of relations.

Method Summary

void	close() INTERNAL: Closes the data source so that it can release any open resources.
ChangelogReaderIF	getChangelogReader(Changelog changelog, java.lang.String startOrder) INTERNAL: Returns a changelog reader.
java.lang.String	getMaxOrderValue(Changelog changelog) INTERNAL: Returns the maximum value of the order column for the specified changelog.
TupleReaderIF	getReader(java.lang.String relation) INTERNAL: Returns a tuple reader for the given relation.
java.util.Collection	getRelations() INTERNAL: Returns the relations that the data source knows of.

Method Detail

getRelations

java.util.Collection getRelations()

INTERNAL: Returns the relations that the data source knows of. The collection return contains Relation instances.

getReader

TupleReaderIF getReader(java.lang.String relation)

INTERNAL: Returns a tuple reader for the given relation.

getChangelogReader

ChangelogReaderIF getChangelogReader(Changelog changelog,
                                     java.lang.String startOrder)

INTERNAL: Returns a changelog reader.

getMaxOrderValue

java.lang.String getMaxOrderValue(Changelog changelog)

INTERNAL: Returns the maximum value of the order column for the specified changelog.

close

void close()

INTERNAL: Closes the data source so that it can release any open resources.