| /******************************************************************************* |
| * Copyright (c) 2000, 2006 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.team.internal.ccvs.ui; |
| |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| /** |
| * Collator to compare two CVS revisions |
| */ |
| public class VersionCollator { |
| public int compare(String revision1, String revision2) { |
| if (revision1 == null && revision2 == null) return 0; |
| if (revision1 == null) return -1; |
| if (revision2 == null) return 1; |
| int[] revision1Segments = getIntSegments(revision1); |
| int[] revision2Segments = getIntSegments(revision2); |
| for (int i = 0; i < revision1Segments.length && i < revision2Segments.length; i++) { |
| int i1 = revision1Segments[i]; |
| int i2 = revision2Segments[i]; |
| if (i1 != i2) { |
| return i1 > i2 ? 1 : -1; |
| } |
| } |
| if (revision1Segments.length != revision2Segments.length) { |
| return revision1Segments.length > revision2Segments.length ? 1 : -1; |
| } |
| return 0; |
| } |
| |
| int[] getIntSegments(String string) { |
| int size = string.length(); |
| if (size == 0) return new int[0]; |
| StringBuffer buffer = new StringBuffer(); |
| List list = new ArrayList(); |
| for (int i = 0; i < size; i++) { |
| char ch = string.charAt(i); |
| if (ch == '.') { |
| list.add(Integer.valueOf(buffer.toString())); |
| buffer = new StringBuffer(); |
| } else { |
| buffer.append(ch); |
| } |
| } |
| list.add(Integer.valueOf(buffer.toString())); |
| int[] result = new int[list.size()]; |
| Iterator it = list.iterator(); |
| for (int i = 0; i < result.length; i++) { |
| result[i] = ((Integer)it.next()).intValue(); |
| } |
| return result; |
| } |
| } |
| |