weka.knowledgeflow.steps

## Class InstanceStreamToBatchMaker

- java.lang.Object
- - weka.knowledgeflow.steps.BaseStep
  - - weka.knowledgeflow.steps.InstanceStreamToBatchMaker

- All Implemented Interfaces:
    java.io.Serializable, BaseStepExtender, Step

      @KFStep(name="InstanceStreamToBatchMaker",
              category="Flow",
              toolTipText="Converts an incoming instance stream into a batch dataset",
              iconPath="weka/gui/knowledgeflow/icons/InstanceStreamToBatchMaker.gif")
      public class InstanceStreamToBatchMaker
      extends BaseStep

  Step that converts an incoming instance stream to a batch dataset
  Version:
    $Revision: $
  Author:
    Mark Hall (mhall{[at]}pentaho{[dot]}com)
  See Also:
    Serialized Form

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `InstanceStreamToBatchMaker()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `java.util.List<java.lang.String>` | `getIncomingConnectionTypes()` Get a list of incoming connection types that this step can accept.
    `java.util.List<java.lang.String>` | `getOutgoingConnectionTypes()` Get a list of outgoing connection types that this step can produce.
    `Instances` | `outputStructureForConnectionType(java.lang.String connectionName)` If possible, get the output structure for the named connection type as a header-only set of instances.
    `void` | `processIncoming(Data data)` Process incoming data
    `void` | `stepInit()` Initialize the step.

    - ### Methods inherited from class weka.knowledgeflow.steps.BaseStep

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

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### InstanceStreamToBatchMaker

          public InstanceStreamToBatchMaker()

  - ### Method Detail

    - #### stepInit

          public void stepInit()
                        throws WekaException

      Initialize the step.
      Throws:
        `WekaException` - if a problem occurs during initialization

    - #### getIncomingConnectionTypes

          public java.util.List<java.lang.String> getIncomingConnectionTypes()

      Get a list of incoming connection types that this step can accept. Ideally (and if appropriate), this should take into account the state of the step and any existing incoming connections. E.g. a step might be able to accept one (and only one) incoming batch data connection.
      Returns:
        a list of incoming connections that this step can accept given its current state

    - #### getOutgoingConnectionTypes

          public java.util.List<java.lang.String> getOutgoingConnectionTypes()

      Get a list of outgoing connection types that this step can produce. Ideally (and if appropriate), this should take into account the state of the step and the incoming connections. E.g. depending on what incoming connection is present, a step might be able to produce a trainingSet output, a testSet output or neither, but not both.
      Returns:
        a list of outgoing connections that this step can produce

    - #### processIncoming

          public void processIncoming(Data data)
                               throws WekaException

      Process incoming data
      Specified by:
        `processIncoming` in interface `BaseStepExtender`
      Specified by:
        `processIncoming` in interface `Step`
      Overrides:
        `processIncoming` in class `BaseStep`
      Parameters:
        `data` - the payload to process
      Throws:
        `WekaException`

    - #### outputStructureForConnectionType

          public Instances outputStructureForConnectionType(java.lang.String connectionName)
                                                     throws WekaException

      If possible, get the output structure for the named connection type as a header-only set of instances. Can return null if the specified connection type is not representable as Instances or cannot be determined at present.
      Specified by:
        `outputStructureForConnectionType` in interface `Step`
      Overrides:
        `outputStructureForConnectionType` in class `BaseStep`
      Parameters:
        `connectionName` - the name of the connection type to get the output structure for
      Returns:
        the output structure as a header-only Instances object
      Throws:
        `WekaException` - if a problem occurs