/* | |
* 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 = '"'; | |
/** | |
* 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(new String[tokens.size()]); | |
} | |
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; | |
} | |
} |