| /******************************************************************************* |
| * 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.CatalogCategory; |
| |
| /** |
| * A comparator that orders categories by relevance and name. |
| * |
| * @author David Green |
| * @author Steffen Pingel |
| */ |
| public class CatalogCategoryComparator implements Comparator<CatalogCategory> { |
| |
| @Override |
| public int compare(CatalogCategory o1, CatalogCategory o2) { |
| if (o1 == o2) { |
| return 0; |
| } |
| String r1 = o1.getRelevance(); |
| String r2 = o2.getRelevance(); |
| int i = 0; |
| if (r1 != null && r2 != null) { |
| // don't have to worry about format, since they were already validated |
| // note that higher relevance appears first, thus the reverse order of |
| // the comparison. |
| i = Integer.valueOf(r2).compareTo(Integer.valueOf(r1)); |
| } else if (r1 == null && r2 != null) { |
| return 1; |
| } else if (r2 == null && r1 != null) { |
| return -1; |
| } |
| if (i == 0) { |
| i = o1.getName().compareToIgnoreCase(o2.getName()); |
| if (i == 0) { |
| i = o1.getId().compareTo(o2.getId()); |
| } |
| } |
| return i; |
| } |
| |
| } |