/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.catalina.util;
import java.util.regex.Pattern;
public class StringUtil {
/**
* {@link Pattern} for a comma delimited string that support whitespace characters
*/
private static final Pattern commaSeparatedValuesPattern = Pattern.compile("\\s*,\\s*");
/**
* Splits a comma-separated string into an array of String values. Whitespace around the commas is removed. Null or
* empty values will return a zero-element array.
*
* @param s The string to split by commas.
*
* @return An array of String values.
*/
public static String[] splitCommaSeparated(String s) {
return (s == null || s.isEmpty()) ? new String[0] : commaSeparatedValuesPattern.split(s);
}
}