org.knime.base.node.preproc.groupby
Class MemoryGroupByTable

java.lang.Object
  org.knime.base.node.preproc.groupby.GroupByTable
      org.knime.base.node.preproc.groupby.MemoryGroupByTable

public class MemoryGroupByTable
extends GroupByTable

Author:

Tobias Koetter, University of Konstanz

Constructor Summary

protected

MemoryGroupByTable(ExecutionContext exec, BufferedDataTable inDataTable, List<String> groupByCols, ColumnAggregator[] colAggregators, GlobalSettings globalSettings, boolean sortInMemory, boolean enableHilite, ColumnNamePolicy colNamePolicy, boolean retainOrder) Constructor for class MemoryGroupByTable.

Method Summary

protected BufferedDataTable

createGroupByTable(ExecutionContext exec, BufferedDataTable dataTable, DataTableSpec resultSpec, int[] groupColIdx)

Methods inherited from class org.knime.base.node.preproc.groupby.GroupByTable

addHiliteMapping, addSkippedGroup, appendOrderColumn, checkGroupCols, createGroupByTableSpec, createSkippedGroupName, getBufferedTable, getColAggregators, getGlobalSettings, getGroupCols, getHiliteMapping, getSkippedGroupsByColName, getSkippedGroupsMessage, isEnableHilite, isRetainOrder, isSortInMemory, sortTable

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryGroupByTable

protected MemoryGroupByTable(ExecutionContext exec,
                             BufferedDataTable inDataTable,
                             List<String> groupByCols,
                             ColumnAggregator[] colAggregators,
                             GlobalSettings globalSettings,
                             boolean sortInMemory,
                             boolean enableHilite,
                             ColumnNamePolicy colNamePolicy,
                             boolean retainOrder)
                      throws CanceledExecutionException

Constructor for class MemoryGroupByTable.

Parameters:

exec - the ExecutionContext

inDataTable - the table to aggregate

groupByCols - the name of all columns to group by

colAggregators - the aggregation columns with the aggregation method to use in the order the columns should be appear in the result table numerical columns

globalSettings - the global settings

sortInMemory - true if the table should be sorted in the memory

enableHilite - true if a row key map should be maintained to enable hiliting

colNamePolicy - the ColumnNamePolicy for the aggregation columns input table if set to true

retainOrder - true if the original row order should be retained

Throws:

CanceledExecutionException - if the user has canceled the execution

Method Detail

createGroupByTable

protected BufferedDataTable createGroupByTable(ExecutionContext exec,
                                               BufferedDataTable dataTable,
                                               DataTableSpec resultSpec,
                                               int[] groupColIdx)
                                        throws CanceledExecutionException

Specified by:

createGroupByTable in class GroupByTable

Parameters:

exec - the ExecutionContext

dataTable - the data table to aggregate

resultSpec - the result DataTableSpec

groupColIdx - the group column indices

Returns:

the aggregated input table

Throws:

CanceledExecutionException - if the operation has been canceled