uk.ac.starlink.table.join
Class NullProgressIndicator

java.lang.Object
  extended by uk.ac.starlink.table.join.NullProgressIndicator
All Implemented Interfaces:
ProgressIndicator

public class NullProgressIndicator
extends Object
implements ProgressIndicator

Dummy progress indicator. All callbacks are no-ops.

Since:
24 Mar 2004

Constructor Summary
NullProgressIndicator()
           
 
Method Summary
 void endStage()
          Indicates that no more ProgressIndicator.setLevel(double) calls will be made until the next ProgressIndicator.startStage(java.lang.String).
 void logMessage(String msg)
          Registers a comment about the progress of the algorithm.
 void setLevel(double level)
          Specifies that the work of the most recently-started stage is a certain proportion complete.
 void startStage(String stage)
          Indicates that a number of ProgressIndicator.setLevel(double) calls may follow, followed by a ProgressIndicator.endStage() call.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

NullProgressIndicator

public NullProgressIndicator()
Method Detail

startStage

public void startStage(String stage)
Description copied from interface: ProgressIndicator
Indicates that a number of ProgressIndicator.setLevel(double) calls may follow, followed by a ProgressIndicator.endStage() call.

Specified by:
startStage in interface ProgressIndicator
Parameters:
stage - name/description of the processing stage

setLevel

public void setLevel(double level)
Description copied from interface: ProgressIndicator
Specifies that the work of the most recently-started stage is a certain proportion complete. Calls to this method must take place between paired calls to ProgressIndicator.startStage(java.lang.String) and ProgressIndicator.endStage(), preferably with non-decreasing values of level.

The method may throw an InterruptedException as a message to the caller that the work should be interrupted. A caller which receives such an exception should stop using resources and tidy up as soon as is convenient.

Specified by:
setLevel in interface ProgressIndicator
Parameters:
level - value between 0. and 1. indicating amount of completion

endStage

public void endStage()
Description copied from interface: ProgressIndicator
Indicates that no more ProgressIndicator.setLevel(double) calls will be made until the next ProgressIndicator.startStage(java.lang.String).

Specified by:
endStage in interface ProgressIndicator

logMessage

public void logMessage(String msg)
Description copied from interface: ProgressIndicator
Registers a comment about the progress of the algorithm. This should not be called between calls to ProgressIndicator.startStage(java.lang.String) and ProgressIndicator.endStage().

Specified by:
logMessage in interface ProgressIndicator
Parameters:
msg - message

Copyright © 2004 CLRC: Central Laboratory of the Research Councils. All rights reserved.