org.griphyn.vdl.router
Interface Arbiter

All Known Implementing Classes:

PreferNamespace

public interface Arbiter

This interface defines an arbitration. If multiple derivations produce the same output file, one derivation must be chosen over all others. There is not yet any mean to declare that none will do.

Version:

$Revision $

Author:

Jens-S. V??ckler, Yong Zhao

Method Summary

Derivation

arbit(Collection dvlist, Map environment) The lone method of the arbitrarion receives some environmental information about the position in the call stack.

Method Detail

arbit

Derivation arbit(Collection dvlist,
                 Map environment)

The lone method of the arbitrarion receives some environmental information about the position in the call stack. Currently, this information is of limited nature. Furthermore, it receives the list of candidates. From this list, one candidate must be chosen, and returned to as the chosen one.

The environmental description currently contains the following entries:

key	type	meaning
lfn	String	Output filename produced by all.
cwns	String	Current working namespace, may be null.
level	Integer	Current recursion depth.

Parameters:

dvlist - is a set of candidates

environment - is a map describing the environment.

Returns:

the chosen candidate from the input set