/*******************************************************************************
* Copyright (c) 2000, 2015 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.jdt.internal.launching;
import java.util.Comparator;
import java.util.List;
/**
* Compares lists of runtime classpath entry mementos.
*/
public class RuntimeClasspathEntryListComparator implements Comparator<Object> {
/**
* @see Comparator#compare(Object, Object)
*/
@Override
public int compare(Object o1, Object o2) {
List<?> list1 = (List<?>)o1;
List<?> list2 = (List<?>)o2;
if (list1.size() == list2.size()) {
for (int i = 0; i < list1.size(); i++) {
String memento1 = (String)list1.get(i);
String memento2 = (String)list2.get(i);
if (!equalsIgnoreWhitespace(memento1, memento2)) {
return -1;
}
}
return 0;
}
return -1;
}
protected boolean equalsIgnoreWhitespace(String one, String two) {
int i1 = 0;
int i2 = 0;
int l1 = one.length();
int l2 = two.length();
char ch1 = ' ';
char ch2 = ' ';
while (i1 < l1 && i2 < l2) {
while (i1 < l1 && Character.isWhitespace(ch1 = one.charAt(i1))) {
i1++;
}
while (i2 < l2 && Character.isWhitespace(ch2 = two.charAt(i2))) {
i2++;
}
if (i1 == l1 && i2 == l2) {
return true;
}
if (ch1 != ch2) {
return false;
}
i1++;
i2++;
}
return true;
}
}