| /* |
| 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.commons.cli; |
| |
| /** |
| * Contains useful helper methods for classes within this package. |
| */ |
| final class Util { |
| |
| /** |
| * An empty immutable {@code String} array. |
| */ |
| static final String[] EMPTY_STRING_ARRAY = {}; |
| |
| /** |
| * Remove the leading and trailing quotes from {@code str}. E.g. if str is '"one two"', then 'one two' is returned. |
| * |
| * @param str The string from which the leading and trailing quotes should be removed. |
| * |
| * @return The string without the leading and trailing quotes. |
| */ |
| static String stripLeadingAndTrailingQuotes(String str) { |
| final int length = str.length(); |
| if (length > 1 && str.startsWith("\"") && str.endsWith("\"") && str.substring(1, length - 1).indexOf('"') == -1) { |
| str = str.substring(1, length - 1); |
| } |
| |
| return str; |
| } |
| |
| /** |
| * Remove the hyphens from the beginning of {@code str} and return the new String. |
| * |
| * @param str The string from which the hyphens should be removed. |
| * |
| * @return the new String. |
| */ |
| static String stripLeadingHyphens(final String str) { |
| if (str == null) { |
| return null; |
| } |
| if (str.startsWith("--")) { |
| return str.substring(2); |
| } |
| if (str.startsWith("-")) { |
| return str.substring(1); |
| } |
| |
| return str; |
| } |
| } |