| /* |
| * 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.codehaus.groovy.tools; |
| |
| import java.util.LinkedList; |
| import java.util.List; |
| |
| public class StringHelper { |
| private static final char |
| SPACE = ' ', SINGLE_QUOTE = '\'', DOUBLE_QUOTE = '"'; |
| private static final String[] EMPTY_STRING_ARRAY = new String[0]; |
| |
| /** |
| * This method tokenizes a string by space characters, |
| * but ignores spaces in quoted parts,that are parts in |
| * '' or "". The method does allows the usage of "" in '' |
| * and '' in "". The space character between tokens is not |
| * returned. |
| * |
| * @param s the string to tokenize |
| * @return the tokens |
| */ |
| public static String[] tokenizeUnquoted(String s) { |
| List tokens = new LinkedList(); |
| int first = 0; |
| while (first < s.length()) { |
| first = skipWhitespace(s, first); |
| int last = scanToken(s, first); |
| if (first < last) { |
| tokens.add(s.substring(first, last)); |
| } |
| first = last; |
| } |
| return (String[])tokens.toArray(EMPTY_STRING_ARRAY); |
| } |
| |
| private static int scanToken(String s, int pos0) { |
| int pos = pos0; |
| while (pos < s.length()) { |
| char c = s.charAt(pos); |
| if (SPACE==c) break; |
| pos++; |
| if (SINGLE_QUOTE == c) { |
| pos = scanQuoted(s, pos, SINGLE_QUOTE); |
| } else if (DOUBLE_QUOTE == c) { |
| pos = scanQuoted(s, pos, DOUBLE_QUOTE); |
| } |
| } |
| return pos; |
| } |
| |
| private static int scanQuoted(String s, int pos0, char quote) { |
| int pos = pos0; |
| while (pos < s.length()) { |
| char c = s.charAt(pos++); |
| if (quote == c) break; |
| } |
| return pos; |
| } |
| |
| private static int skipWhitespace(String s, int pos0) { |
| int pos = pos0; |
| while (pos < s.length()) { |
| char c = s.charAt(pos); |
| if (SPACE!=c) break; |
| pos++; |
| } |
| return pos; |
| } |
| } |