Package weka.knowledgeflow.steps

Class SubstringLabeler

java.lang.Object
weka.knowledgeflow.steps.BaseStep
weka.knowledgeflow.steps.SubstringLabeler
All Implemented Interfaces:
Serializable, BaseStepExtender, Step
@KFStep(name="SubstringLabeler", category="Tools", toolTipText="Label instances according to substring matches in String attributes The user can specify the attributes to match against and associated label to create by defining \'match\' rules. A new attribute is appended to the data to contain the label. Rules are applied in order when processing instances, and the label associated with the first matching rule is applied. Non-matching instances can either receive a missing value for the label attribute or be \'consumed\' (i.e. they are not output).", iconPath="weka/gui/knowledgeflow/icons/DefaultFilter.gif") public class SubstringLabeler extends BaseStep
Step that appends a label to incoming instances according to substring matches in string attributes. Multiple match "rules" can be specified - these get applied in the order that they are defined. Each rule can be applied to one or more user-specified input String attributes. Attributes can be specified using either a range list (e.g 1,2-10,last) or by a comma separated list of attribute names (where "/first" and "/last" are special strings indicating the first and last attribute respectively).
Version:
$Revision: $
Author:
Mark Hall (mhall{[at]}pentaho{[dot]}com)
See Also:

  • Constructor Details

    • SubstringLabeler

      public SubstringLabeler()

  • Method Details

    • setMatchDetails

      @ProgrammaticProperty public void setMatchDetails(String details)
      Set internally encoded list of match rules
      Parameters:
      details - the list of match rules

    • getMatchDetails

      public String getMatchDetails()
      Get the internally encoded list of match rules
      Returns:
      the match rules

    • setNominalBinary

      @OptionMetadata(displayName="Make a nominal binary attribute", description="Whether to encode the new attribute as nominal when it is binary (as opposed to numeric)", displayOrder=1) public void setNominalBinary(boolean nom)
      Set whether the new attribute created should be a nominal binary attribute rather than a numeric binary attribute.
      Parameters:
      nom - true if the attribute should be a nominal binary one

    • getNominalBinary

      public boolean getNominalBinary()
      Get whether the new attribute created should be a nominal binary attribute rather than a numeric binary attribute.
      Returns:
      true if the attribute should be a nominal binary one

    • setConsumeNonMatching

      @OptionMetadata(displayName="Consume non matching instances", description="Instances that do not match any rules will be consumed, rather than being output with a missing value for the new attribute", displayOrder=2) public void setConsumeNonMatching(boolean consume)
      Set whether instances that do not match any of the rules should be "consumed" rather than output with a missing value set for the new attribute.
      Parameters:
      consume - true if non matching instances should be consumed by the component.

    • getConsumeNonMatching

      public boolean getConsumeNonMatching()
      Get whether instances that do not match any of the rules should be "consumed" rather than output with a missing value set for the new attribute.
      Returns:
      true if non matching instances should be consumed by the component.

    • setMatchAttributeName

      @OptionMetadata(displayName="Name of the new attribute", description="Name to give the new attribute", displayOrder=0) public void setMatchAttributeName(String name)
      Set the name of the new attribute that is created to indicate the match
      Parameters:
      name - the name of the new attribute

    • getMatchAttributeName

      public String getMatchAttributeName()
      Get the name of the new attribute that is created to indicate the match
      Returns:
      the name of the new attribute

    • stepInit

      public void stepInit() throws WekaException
      Initialize the step
      Throws:
      WekaException - if a problem occurs

    • getIncomingConnectionTypes

      public List<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 List<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 an incoming data payload (if the step accepts incoming connections)
      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

    • outputStructureForConnectionType

      public Instances outputStructureForConnectionType(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

    • getCustomEditorForStep

      public String getCustomEditorForStep()
      Return the fully qualified name of a custom editor component (JComponent) to use for editing the properties of the step. This method can return null, in which case the system will dynamically generate an editor using the GenericObjectEditor
      Specified by:
      getCustomEditorForStep in interface Step
      Overrides:
      getCustomEditorForStep in class BaseStep
      Returns:
      the fully qualified name of a step editor component