Class Loader

All Implemented Interfaces:
ImageObserver, MenuContainer, BeanContextChild, Serializable, Accessible, EnvironmentHandler, BeanCommon, DataSource, EventConstraints, Startable, StructureProducer, Visible, WekaWrapper

Loads data sets using weka.core.converter classes
Since:
1.0
Version:
$Revision: 10221 $
Author:
Mark Hall
See Also:
  • Constructor Details

    • Loader

      public Loader()
  • Method Details

    • globalInfo

      public String globalInfo()
      Global info (if it exists) for the wrapped loader
      Returns:
      the global info
    • setDB

      public void setDB(boolean flag)
    • setBeanContext

      public void setBeanContext(BeanContext bc)
      Set a bean context for this bean
      Specified by:
      setBeanContext in interface BeanContextChild
      Overrides:
      setBeanContext in class AbstractDataSource
      Parameters:
      bc - a BeanContext value
    • setLoader

      public void setLoader(Loader loader)
      Set the loader to use
      Parameters:
      loader - a weka.core.converters.Loader value
    • getStructure

      public Instances getStructure(String eventName)
      Get the structure of the output encapsulated in the named event. If the structure can't be determined in advance of seeing input, or this StructureProducer does not generate the named event, null should be returned.
      Specified by:
      getStructure in interface StructureProducer
      Parameters:
      eventName - the name of the output event that encapsulates the requested output.
      Returns:
      the structure of the output encapsulated in the named event or null if it can't be determined in advance of seeing input or the named event is not generated by this StructureProduce.
    • getLoader

      public Loader getLoader()
      Get the loader
      Returns:
      a weka.core.converters.Loader value
    • setWrappedAlgorithm

      public void setWrappedAlgorithm(Object algorithm)
      Set the loader
      Specified by:
      setWrappedAlgorithm in interface WekaWrapper
      Parameters:
      algorithm - a Loader
      Throws:
      IllegalArgumentException - if an error occurs
    • getWrappedAlgorithm

      public Object getWrappedAlgorithm()
      Get the loader
      Specified by:
      getWrappedAlgorithm in interface WekaWrapper
      Returns:
      a Loader
    • startLoading

      public void startLoading()
      Start loading data
    • start

      public void start() throws Exception
      Start loading
      Specified by:
      start in interface Startable
      Throws:
      Exception - if something goes wrong
    • getStartMessage

      public String getStartMessage()
      Gets a string that describes the start action. The KnowledgeFlow uses this in the popup contextual menu for the component. The string can be proceeded by a '$' character to indicate that the component can't be started at present.
      Specified by:
      getStartMessage in interface Startable
      Returns:
      a string describing the start action.
    • eventGeneratable

      public boolean eventGeneratable(String eventName)
      Returns true if the named event can be generated at this time
      Specified by:
      eventGeneratable in interface EventConstraints
      Parameters:
      eventName - the event
      Returns:
      a boolean value
    • addDataSourceListener

      public void addDataSourceListener(DataSourceListener dsl)
      Add a listener
      Specified by:
      addDataSourceListener in interface DataSource
      Overrides:
      addDataSourceListener in class AbstractDataSource
      Parameters:
      dsl - a DataSourceListener value
    • removeDataSourceListener

      public void removeDataSourceListener(DataSourceListener dsl)
      Remove a listener
      Specified by:
      removeDataSourceListener in interface DataSource
      Overrides:
      removeDataSourceListener in class AbstractDataSource
      Parameters:
      dsl - a DataSourceListener value
    • addInstanceListener

      public void addInstanceListener(InstanceListener dsl)
      Add an instance listener
      Specified by:
      addInstanceListener in interface DataSource
      Overrides:
      addInstanceListener in class AbstractDataSource
      Parameters:
      dsl - a InstanceListener value
    • removeInstanceListener

      public void removeInstanceListener(InstanceListener dsl)
      Remove an instance listener
      Specified by:
      removeInstanceListener in interface DataSource
      Overrides:
      removeInstanceListener in class AbstractDataSource
      Parameters:
      dsl - a InstanceListener value
    • main

      public static void main(String[] args)
    • setCustomName

      public void setCustomName(String name)
      Set a custom (descriptive) name for this bean
      Specified by:
      setCustomName in interface BeanCommon
      Parameters:
      name - the name to use
    • getCustomName

      public String getCustomName()
      Get the custom (descriptive) name for this bean (if one has been set)
      Specified by:
      getCustomName in interface BeanCommon
      Returns:
      the custom name (or the default name)
    • setLog

      public void setLog(Logger logger)
      Set a logger
      Specified by:
      setLog in interface BeanCommon
      Parameters:
      logger - a weka.gui.Logger value
    • setEnvironment

      public void setEnvironment(Environment env)
      Set environment variables to use.
      Specified by:
      setEnvironment in interface EnvironmentHandler
      Parameters:
      env - the environment variables to use
    • connectionAllowed

      public boolean connectionAllowed(EventSetDescriptor esd)
      Returns true if, at this time, the object will accept a connection via the supplied EventSetDescriptor. Always returns false for loader.
      Specified by:
      connectionAllowed in interface BeanCommon
      Parameters:
      esd - the EventSetDescriptor
      Returns:
      true if the object will accept a connection
    • connectionAllowed

      public boolean connectionAllowed(String eventName)
      Returns true if, at this time, the object will accept a connection via the named event
      Specified by:
      connectionAllowed in interface BeanCommon
      Parameters:
      eventName - the name of the event
      Returns:
      true if the object will accept a connection
    • connectionNotification

      public void connectionNotification(String eventName, Object source)
      Notify this object that it has been registered as a listener with a source for receiving events described by the named event This object is responsible for recording this fact.
      Specified by:
      connectionNotification in interface BeanCommon
      Parameters:
      eventName - the event
      source - the source with which this object has been registered as a listener
    • disconnectionNotification

      public void disconnectionNotification(String eventName, Object source)
      Notify this object that it has been deregistered as a listener with a source for named event. This object is responsible for recording this fact.
      Specified by:
      disconnectionNotification in interface BeanCommon
      Parameters:
      eventName - the event
      source - the source with which this object has been registered as a listener
    • stop

      public void stop()
      Stop any loading action.
      Specified by:
      stop in interface BeanCommon
    • isBusy

      public boolean isBusy()
      Returns true if. at this time, the bean is busy with some (i.e. perhaps a worker thread is performing some calculation).
      Specified by:
      isBusy in interface BeanCommon
      Returns:
      true if the bean is busy.