| /******************************************************************************* |
| * Copyright (c) 2009, 2017 Tasktop Technologies and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Tasktop Technologies - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.equinox.internal.p2.discovery.util; |
| |
| import java.util.Comparator; |
| import org.eclipse.equinox.internal.p2.discovery.model.*; |
| |
| /** |
| * A comparator that orders connectors by group and alphabetically by their name. |
| * |
| * @author David Green |
| */ |
| public class CatalogItemComparator implements Comparator<CatalogItem> { |
| |
| /** |
| * compute the index of the group id |
| * |
| * @param groupId |
| * the group id or null |
| * @return the index, or -1 if not found |
| */ |
| private int computeGroupIndex(CatalogCategory category, String groupId) { |
| if (groupId != null) { |
| int index = -1; |
| for (Group group : category.getGroup()) { |
| ++index; |
| if (group.getId().equals(groupId)) { |
| return index; |
| } |
| } |
| } |
| return -1; |
| } |
| |
| @Override |
| public int compare(CatalogItem o1, CatalogItem o2) { |
| if (o1.getCategory() != o2.getCategory()) { |
| throw new IllegalArgumentException(); |
| } |
| if (o1 == o2) { |
| return 0; |
| } |
| int g1 = computeGroupIndex(o1.getCategory(), o1.getGroupId()); |
| int g2 = computeGroupIndex(o2.getCategory(), o2.getGroupId()); |
| int i; |
| if (g1 != g2) { |
| if (g1 == -1) { |
| i = 1; |
| } else if (g2 == -1) { |
| i = -1; |
| } else { |
| i = g1 - g2; |
| } |
| } else { |
| i = o1.getName().compareToIgnoreCase(o2.getName()); |
| if (i == 0) { |
| i = o1.getId().compareTo(o2.getId()); |
| } |
| } |
| return i; |
| } |
| |
| } |