| /******************************************************************************* |
| * Copyright (c) 2013, 2020 Alexandre Pauzies and others. |
| * |
| * This program and the accompanying materials are made |
| * available under the terms of the Eclipse Public License 2.0 |
| * which is available at https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Alexandre Pauzies <alexandre@pauzies.com> - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.nebula.widgets.nattable.extension.glazedlists.groupBy.summary; |
| |
| import java.util.List; |
| |
| public interface IGroupBySummaryProvider<T> { |
| |
| public static final Object DEFAULT_SUMMARY_VALUE = "..."; //$NON-NLS-1$ |
| |
| /** |
| * @param columnIndex |
| * The column index of the column for which the summary should be |
| * calculated. |
| * @param children |
| * The child objects to operate on. |
| * @return The calculated summary value for the column. |
| */ |
| public Object summarize(int columnIndex, List<T> children); |
| } |
