Package org.eclipse.nebula.widgets.nattable.summaryrow

Interface ISummaryProvider

All Known Implementing Classes:

SummationSummaryProvider

public interface ISummaryProvider

Summarizes the values in a column. Used by the SummaryRowLayer to calculate summary values.

Field Summary

Fields

Modifier and Type	Field	Description
static final ISummaryProvider	DEFAULT	This instance will always return DEFAULT_SUMMARY_VALUE and does not perform a calculation.
static final Object	DEFAULT_SUMMARY_VALUE
static final ISummaryProvider	NONE	Register this instance to indicate that a summary is not required.

Method Summary

Modifier and Type	Method	Description
Object	summarize(int columnIndex)

Field Details

DEFAULT_SUMMARY_VALUE

static final Object DEFAULT_SUMMARY_VALUE

NONE

static final ISummaryProvider NONE

Register this instance to indicate that a summary is not required. Doing so avoids calls to the ISummaryProvider and is a performance tweak.

DEFAULT

static final ISummaryProvider DEFAULT

This instance will always return DEFAULT_SUMMARY_VALUE and does not perform a calculation.

Method Details

summarize

Object summarize(int columnIndex)

Parameters:

columnIndex - The column index of the column for which the summary should be calculated.

Returns:

The calculated summary value for the column.