Package apollo.dataadapter.das.simple

Provides simple implementations of the interfaces defined in the apollo.dataadapter.das package.

See:
Description

Class Summary

DASDsnContentHandler	I am the ContentHandler used when SimpleDASServer parses the result of a 'dsn' call to a das data source.
DASEntryPointContentHandler	I am the ContentHandler used when SimpleDASServer parses the result of a 'entry_points' call to a das data source and dsn.
DASFeatureContentHandler	I am the ContentHandler used when SimpleDASServer parses the result of a 'features' call to a das data source (with a specified dsn and segment).
DASSequenceContentHandler	I am the ContentHandler used when SimpleDASServer parses the result of a 'dna' call to a das data source (passing in dsn and segment).
SimpleDASAdapter	I implement a AbstractDataAdapter, allowing Apollo to get information from DAS datasources, using 'simple' implementions of DASServerI, DASDsn etc.
SimpleDASAdapterGUI	I implement a AbstractDataAdapterUI, allowing Apollo to get information from DAS datasources, using 'simple' implementions of DASServerI, DASDsn etc.
SimpleDASDsn
SimpleDASFeature	I am a lightweight implementation of the DASFeature interface.
SimpleDASSegment	I am a lightweight implementation of the DASSegment interface.
SimpleDASSequence	I am a lightweight implementation of the DASSequence interface.
SimpleDASServer	2/2006: I am a little confused about why this is called *server*, since it is actually client-side--it gets data *from* a DAS server.

Package apollo.dataadapter.das.simple Description

Provides simple implementations of the interfaces defined in the apollo.dataadapter.das package. The goal is to minimize dependecy on other software packages. In particular,

• SimpleDASAdapterGUI is invoked by the Apollo framework: this in turn, this creates the SimpleDASAdapter. The adapter creates a...
• SimpleDASServer, which does direct SAX-parsing of requests, using the Content-handler classes DASDsnContentHandler, DASSegmentContentHandler, DASFeatureContentHandler and DASSequenceContentHandler. These handlers parse das-dsn, entry_points, features and dna requests respectively.
• In order to create requests, we create an instance of SimpleDASDsn and an array of SimpleDASSegment's to pass to the server. When the request is parsed, the result (obtained from the SimpleDASServer) is a list of SimpleDASDsn's or SimpleDASSegment's or SimpleDASFeature's.