org.knime.base.node.preproc.filter.row.rowfilter
Class MissingCellRowFilter

java.lang.Object
  extended by org.knime.base.node.preproc.filter.row.rowfilter.RowFilter
      extended by org.knime.base.node.preproc.filter.row.rowfilter.MissingCellRowFilter
All Implemented Interfaces:
Cloneable

public class MissingCellRowFilter
extends RowFilter

A simple RowFilter implementation that filters rows containing missing cells.

Author:
Kilian Thiel, University of Konstanz

Constructor Summary
MissingCellRowFilter()
           
 
Method Summary
 DataTableSpec configure(DataTableSpec inSpec)
          Called when a new DataTableSpec is available.
static boolean hasMissingCells(DataRow row)
          Checks if given row contains missing cells and returns true, otherwise false.
 void loadSettingsFrom(NodeSettingsRO cfg)
          Load your internal settings from the configuration object.
 boolean matches(DataRow row, int rowIndex)
          Return true if the specified row matches the criteria set in the filter.
protected  void saveSettings(NodeSettingsWO cfg)
          Do not call this function - rather call RowFilter.saveSettingsTo(NodeSettingsWO).
 
Methods inherited from class org.knime.base.node.preproc.filter.row.rowfilter.RowFilter
clone, saveSettingsTo
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

MissingCellRowFilter

public MissingCellRowFilter()
Method Detail

configure

public DataTableSpec configure(DataTableSpec inSpec)
                        throws InvalidSettingsException
Called when a new DataTableSpec is available. The filters can grab whatever they need from that new config (e.g. a comparator), should do some error checking (e.g. col number against number of columns) - throw an InvalidSettingsException if settings are invalid, and can return a new table spec according to their settings - if they can. If a filter cannot tell how it would modify the spec, it should return null. (Returned table specs are not used right now anyway.)

Specified by:
configure in class RowFilter
Parameters:
inSpec - the new spec propagated into the row filter node. Could be null or empty!
Returns:
a new table spec, if you can
Throws:
InvalidSettingsException - if the settings in the row filter are not compatible with the table spec coming in

loadSettingsFrom

public void loadSettingsFrom(NodeSettingsRO cfg)
                      throws InvalidSettingsException
Load your internal settings from the configuration object. Throw an exception if the config is invalid/incorrect/inconsistent.

Specified by:
loadSettingsFrom in class RowFilter
Parameters:
cfg - the object holding the settings to load
Throws:
InvalidSettingsException - if cfg contains invalid/incorrect/inconsistent settings

matches

public boolean matches(DataRow row,
                       int rowIndex)
                throws EndOfTableException,
                       IncludeFromNowOn
Return true if the specified row matches the criteria set in the filter. Can throw a EndOfTableException if the filter can tell that no more rows of the table will be able to fulfill the criteria.

Specified by:
matches in class RowFilter
Parameters:
row - the row to test
rowIndex - the row index of the passed row in the original table
Returns:
true if the row matches the criteria set in the filter, false if not
Throws:
EndOfTableException - if there is no chance that any of the rows coming (including the current rowIndex) will fulfill the criteria, thus no further row in the original table will be a match to this filter. (In general this is hard to tell, but a row number filter can certainly use it.) If the exception is received the row filter table iterator will flag an end of table.
IncludeFromNowOn - if the current and all following rows from now on are to be included into the result table

hasMissingCells

public static final boolean hasMissingCells(DataRow row)
Checks if given row contains missing cells and returns true, otherwise false.

Parameters:
row - The row to check for missing cells
Returns:
true if row contains missing cells, otherwise false

saveSettings

protected void saveSettings(NodeSettingsWO cfg)
Do not call this function - rather call RowFilter.saveSettingsTo(NodeSettingsWO). This is just a helper function for RowFilter.saveSettingsTo(NodeSettingsWO). Row filters implement this and do the work usually done in RowFilter.saveSettingsTo(NodeSettingsWO). The passed config is prepared in a way that the factory will be able to recreate this object from it.

Specified by:
saveSettings in class RowFilter
Parameters:
cfg - object to add the current internal settings to


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University of Konstanz, Germany.
Chair for Bioinformatics and Information Mining, Prof. Dr. Michael R. Berthold.
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