Package org.geotoolkit.metadata.sql

An implementation of Metadata interfaces fetching the data from an SQL database.

See:
Description

Class Summary

MetadataSource	A connection to a metadata database in read-only mode.
MetadataWriter	A connection to a metadata database with write capabilities.

Exception Summary

MetadataException

Throws when a metadata method failed.

Package org.geotoolkit.metadata.sql Description

An implementation of Metadata interfaces fetching the data from an SQL database. Each metadata classes are mapped to a table, and each metadata attributes are mapped to a column in the appropriate table. Tables and columns are created only when first needed.

This package is not a replacement for more sophisticated metadata applications like MD-Web. This package provides only a direct mapping (i.e. no meta-model) of metadata interfaces and methods to database tables and columns with limited capability. This is suitable only for applications wanting a simple metadata schema. The restrictions are:

• Interfaces and methods must have UML annotations.
• Collections are not currently supported (only the first element is stored).
• InternationalString are stored only for the default locale.
• Cyclic graph (A references B which reference A) are not supported, unless foreigner key constraints are manualy disabled for the columns which contain the cyclic references.
• Metadata that are sub-interface of other metadata (for example GeographicDescription which extends GeographicExtent) can be stored only in databases supporting table inheritance, like PostgreSQL.

Since:

3.03 (derived from 2.1)

Version:

3.03

Author:

Touraïvane (IRD), Martin Desruisseaux (IRD, Geomatys)

Module:

metadata/geotk-metadata-sql (download)