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Class weka.gui.streams.InstanceJoiner

java.lang.Object
   |
   +----weka.gui.streams.InstanceJoiner

public class InstanceJoiner

extends Object

implements Serializable, InstanceProducer, SerialInstanceListener

Version:

$Revision: 1.1 $

Author:

Len Trigg (trigg@cs.waikato.ac.nz)

InstanceJoiner()

Setup the initial states of the member variables

addInstanceListener(InstanceListener)

batchFinished()

Signify that this batch of input to the filter is finished.

getDebug()

input(Instance)

inputFormat(Instances)

Sets the format of the input instances.

instanceProduced(InstanceEvent)

outputFormat()

Gets the format of the output instances.

outputPeek()

Output an instance after filtering but do not remove from the output queue.

removeInstanceListener(InstanceListener)

secondInstanceProduced(InstanceEvent)

setDebug(boolean)

 public InstanceJoiner()

Setup the initial states of the member variables

 public boolean inputFormat(Instances instanceInfo)

Sets the format of the input instances. If the filter is able to determine the output format before seeing any input instances, it does so here. This default implementation assumes the output format is determined when batchFinished() is called.

Parameters:

instanceInfo - an Instances object containing the input instance structure (any instances contained in the object are ignored - only the structure is required).

Returns:

true if the outputFormat may be collected immediately

 public Instances outputFormat() throws Exception

Gets the format of the output instances. This should only be called after input() or batchFinished() has returned true.

Returns:

an Instances object containing the output instance structure only.

Throws: Exception

if no input structure has been defined (or the output format hasn't been determined yet)

 public boolean input(Instance instance) throws Exception

 public void batchFinished() throws Exception

Signify that this batch of input to the filter is finished. If the filter requires all instances prior to filtering, output() may now be called to retrieve the filtered instances. Any subsequent instances filtered should be filtered based on setting obtained from the first batch (unless the inputFormat has been re-assigned or new options have been set). This default implementation assumes all instance processing occurs during inputFormat() and input().

Returns:

true if there are instances pending output

Throws: Exception

if no input structure has been defined

 public Instance outputPeek() throws Exception

Output an instance after filtering but do not remove from the output queue.

Returns:

the instance that has most recently been filtered (or null if the queue is empty).

Throws: Exception

if no input structure has been defined

 public void setDebug(boolean debug)

 public boolean getDebug()

 public synchronized void addInstanceListener(InstanceListener ipl)

 public synchronized void removeInstanceListener(InstanceListener ipl)

 public void instanceProduced(InstanceEvent e)

 public void secondInstanceProduced(InstanceEvent e)

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