| /******************************************************************************* |
| * Copyright (c) 2000, 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.debug.internal.core.sourcelookup; |
| |
| import java.util.Comparator; |
| |
| /** |
| * Comparator for source locator mementors. Ignores whitespace differences. |
| * |
| * @since 3.0 |
| */ |
| public class SourceLocatorMementoComparator implements Comparator { |
| /* (non-Javadoc) |
| * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object) |
| */ |
| public int compare(Object o1, Object o2) { |
| String m1 = (String)o1; |
| String m2 = (String)o2; |
| int i1 = 0, i2 = 0; |
| while (i1 < m1.length()) { |
| i1 = skipWhitespace(m1, i1); |
| i2 = skipWhitespace(m2, i2); |
| if (i1 < m1.length() && i2 < m2.length()) { |
| if (m1.charAt(i1) != m2.charAt(i2)) { |
| return -1; |
| } |
| i1++; |
| i2++; |
| } else { |
| if (i2 < m2.length()) { |
| return -1; |
| } |
| return 0; |
| } |
| } |
| return 0; |
| } |
| |
| private int skipWhitespace(String string, int offset) { |
| while (offset < string.length() && Character.isWhitespace(string.charAt(offset))) { |
| offset++; |
| } |
| return offset; |
| } |
| } |