Package weka.knowledgeflow.steps

Class ImageViewer

java.lang.Object

weka.knowledgeflow.steps.BaseStep

weka.knowledgeflow.steps.ImageViewer

All Implemented Interfaces:

Serializable, BaseStepExtender, DataCollector, Step

@KFStep(name="ImageViewer",
        category="Visualization",
        toolTipText="View images",
        iconPath="weka/gui/knowledgeflow/icons/StripChart.gif")
public class ImageViewer
extends BaseStep
implements DataCollector

A step for collecting and viewing image data

Version:

$Revision: $

Author:

Mark Hall (mhall{[at]}pentaho{[dot]}com)

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
ImageViewer()

Method Summary

Modifier and Type	Method	Description
static Map<String,byte[]>	bufferedImageMapToSerializableByteMap(Map<String,BufferedImage> images)	Utility method to convert a map of BufferedImage to a map of byte arrays (that hold each image as png bytes)
static Map<String,BufferedImage>	byteArrayImageMapToBufferedImageMap(Map<String,byte[]> dataMap)	Utility method to convert a map of byte[] png image data to a map of BufferedImage
Map<String,BufferedImage>	getImages()	Get a map of named images that this step has collected
List<String>	getIncomingConnectionTypes()	Get a list of acceptable incoming connections - only StepManager.CON_IMAGE in this case
Map<String,String>	getInteractiveViewers()	Gets a list of classes of viewers that can be popped up in the GUI Knowledge Flow from this step, given that we have received and stored some image data.
List<String>	getOutgoingConnectionTypes()	Get a list of outgoing connections that can be generated given the current state of the step - will produce StepManager.CON_IMAGE data if we have at least one incoming image connection connection
void	processIncoming(Data data)	Process incoming image data
void	restoreData(Object data)	Restore data for this step.
Object	retrieveData()	Retrieve the data stored in this step.
void	stepInit()	Initialize the step.

Methods inherited from class weka.knowledgeflow.steps.BaseStep

environmentSubstitute, getCustomEditorForStep, getDefaultSettings, getInteractiveViewersImpls, getName, getStepManager, globalInfo, isResourceIntensive, isStopRequested, outputStructureForConnectionType, outputStructureForConnectionType, setName, setStepIsResourceIntensive, setStepManager, setStepMustRunSingleThreaded, start, stepMustRunSingleThreaded, stop

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ImageViewer

public ImageViewer()

Method Details

stepInit

public void stepInit()

Initialize the step. Nothing to do in the case of this step

Specified by:

stepInit in interface BaseStepExtender

Specified by:

stepInit in interface Step

getIncomingConnectionTypes

public List<String> getIncomingConnectionTypes()

Get a list of acceptable incoming connections - only StepManager.CON_IMAGE in this case

Specified by:

getIncomingConnectionTypes in interface BaseStepExtender

Specified by:

getIncomingConnectionTypes in interface Step

Returns:

a list of acceptable incoming connections

getOutgoingConnectionTypes

public List<String> getOutgoingConnectionTypes()

Get a list of outgoing connections that can be generated given the current state of the step - will produce StepManager.CON_IMAGE data if we have at least one incoming image connection connection

Specified by:

getOutgoingConnectionTypes in interface BaseStepExtender

Specified by:

getOutgoingConnectionTypes in interface Step

Returns:

a list of outgoing connections

processIncoming

public void processIncoming(Data data)
                     throws WekaException

Process incoming image data

Specified by:

processIncoming in interface BaseStepExtender

Specified by:

processIncoming in interface Step

Overrides:

processIncoming in class BaseStep

Parameters:

data - the data to process

Throws:

WekaException - if a problem occurs

getImages

public Map<String,BufferedImage> getImages()

Get a map of named images that this step has collected

Returns:

a map of named images

getInteractiveViewers

public Map<String,String> getInteractiveViewers()

Gets a list of classes of viewers that can be popped up in the GUI Knowledge Flow from this step, given that we have received and stored some image data.

Specified by:

getInteractiveViewers in interface Step

Overrides:

getInteractiveViewers in class BaseStep

Returns:

a list of viewer classes

retrieveData

public Object retrieveData()

Retrieve the data stored in this step. This is a map of png image data (as raw bytes), keyed by image name.

Specified by:

retrieveData in interface DataCollector

Returns:

the data stored in this step

restoreData

public void restoreData(Object data)
                 throws WekaException

Restore data for this step. Argument is expected to be a map of png image data (as raw bytes) keyed by image name

Specified by:

restoreData in interface DataCollector

Parameters:

data - the data to set

Throws:

WekaException - if a problem occurs

byteArrayImageMapToBufferedImageMap

public static Map<String,BufferedImage> byteArrayImageMapToBufferedImageMap(Map<String,byte[]> dataMap)
                                                                     throws IOException

Utility method to convert a map of byte[] png image data to a map of BufferedImage

Parameters:

dataMap - the map containing raw png byte arrays

Returns:

a map of BufferedImages

Throws:

IOException - if a problem occurs

bufferedImageMapToSerializableByteMap

public static Map<String,byte[]> bufferedImageMapToSerializableByteMap(Map<String,BufferedImage> images)

Utility method to convert a map of BufferedImage to a map of byte arrays (that hold each image as png bytes)

Parameters:

images - the map of BufferedImages to convert

Returns:

a map of png byte arrays