charger.db

Interface CGDatabase

All Known Implementing Classes:

TextDatabase

public interface CGDatabase

Defines a "database" for purposes of the <lookup> actor. Subclasses

Method Summary

Modifier and Type	Method and Description
void	closeDB() Makes the database no longer accessible to CharGer.
String	doLookup(String keytype, String keyvalue, String targettype) Perform the actual lookup for a key.
String	getName() Accesses the name by which the database will be known to graphs.
void	resetDB() Opens and resets the given database so that it is ready to be accessed from its beginning.

Method Detail

getName

String getName()

Accesses the name by which the database will be known to graphs. This means a valid referent for a "Database" concept in an editor frame.

Returns:

name of the database

See Also:

GraphUpdater

resetDB

void resetDB()

Opens and resets the given database so that it is ready to be accessed from its beginning.

closeDB

void closeDB()

Makes the database no longer accessible to CharGer.

doLookup

String doLookup(String keytype,
                String keyvalue,
                String targettype)

Perform the actual lookup for a key. The keytype and targettype can be considered as field names in a typical relation. doLookup find the target value that corresponds with the keyvalue that appears in the keytype field of a record. Returns the first one that matches if there are muliple occurrences of the keyvalue.

Parameters:

keytype - Actually the CharGer type for what a particular key is; e.g., "Birth Date" or "Gender"

keyvalue - The CharGer referent value for a concept of type keytype

targettype - the CharGer type for the key value to be looked up, as in keytype

Returns:

target value that corresponds to the targettype associated with the keytype and value, null if there isn't one.