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* The Apache Software License, Version 1.1
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* Copyright (c) 1999 The Apache Software Foundation. All rights
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* 3. The end-user documentation included with the redistribution, if
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* any, must include the following acknowlegement:
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* "This product includes software developed by the
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* Apache Software Foundation (http://www.apache.org/)."
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* Alternately, this acknowlegement may appear in the software itself,
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* if and wherever such third-party acknowlegements normally appear.
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* 4. The names "The Jakarta Project", "Ant", and "Apache Software
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* Foundation" must not be used to endorse or promote products derived
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* from this software without prior written permission. For written
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* permission, please contact apache@apache.org.
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* 5. Products derived from this software may not be called "Apache"
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* nor may "Apache" appear in their names without prior written
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* permission of the Apache Group.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* ====================================================================
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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package org.apache.tools.ant;
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* A Path tokenizer takes a path and returns the components that make up
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* The path can use path separators of either ':' or ';' and file separators
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* of either '/' or '\'
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* @author Conor MacNeill (conor@ieee.org)
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public class PathTokenizer {
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* A tokenizer to break the string up based on the ':' or ';' separators.
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private StringTokenizer tokenizer;
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* A String which stores any path components which have been read ahead.
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private String lookahead = null;
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* Flag to indicate whether we are running on a platform with a DOS style
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private boolean dosStyleFilesystem;
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public PathTokenizer(String path) {
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tokenizer = new StringTokenizer(path, ":;", false);
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dosStyleFilesystem = File.pathSeparatorChar == ';';
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public boolean hasMoreTokens() {
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if (lookahead != null) {
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return tokenizer.hasMoreTokens();
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public String nextToken() throws NoSuchElementException {
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if (lookahead != null) {
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token = tokenizer.nextToken().trim();
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if (token.length() == 1 && Character.isLetter(token.charAt(0))
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&& dosStyleFilesystem
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&& tokenizer.hasMoreTokens()) {
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// we are on a dos style system so this path could be a drive
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// spec. We look at the next token
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String nextToken = tokenizer.nextToken().trim();
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if (nextToken.startsWith("\\") || nextToken.startsWith("/")) {
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// we know we are on a DOS style platform and the next path starts with a
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// slash or backslash, so we know this is a drive spec
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token += ":" + nextToken;
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// store the token just read for next time
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lookahead = nextToken;