com.liferay.petra.string.StringUtil Maven / Gradle / Ivy
/**
* Copyright (c) 2000-present Liferay, Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*/
package com.liferay.petra.string;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* The String utility class.
*
* @author Brian Wing Shun Chan
* @author Sandeep Soni
* @author Ganesh Ram
* @author Shuyang Zhou
* @author Hugo Huijser
*/
public class StringUtil {
public static List split(String s) {
return split(s, CharPool.COMMA);
}
public static List split(String s, char delimiter) {
if ((s == null) || s.isEmpty()) {
return Collections.emptyList();
}
s = s.trim();
if (s.isEmpty()) {
return Collections.emptyList();
}
List elements = new ArrayList<>();
_split(elements, s, delimiter);
return elements;
}
private static void _split(List values, String s, char delimiter) {
int offset = 0;
int pos;
while ((pos = s.indexOf(delimiter, offset)) != -1) {
if (offset < pos) {
values.add(s.substring(offset, pos));
}
offset = pos + 1;
}
if (offset < s.length()) {
values.add(s.substring(offset));
}
}
}