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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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* language governing permissions and limitations under the License.
*
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* file and include the License file at packager/legal/LICENSE.txt.
*
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* exception as provided by Oracle in the GPL Version 2 section of the License
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*
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*/
package com.sun.enterprise.admin.cli;
import java.io.*;
import java.util.*;
import com.sun.enterprise.universal.i18n.LocalStringsImpl;
public class ArgumentTokenizer {
protected int currentPosition;
protected int maxPosition;
protected String str;
protected StringBuilder token = new StringBuilder();
private static final LocalStringsImpl strings =
new LocalStringsImpl(ArgumentTokenizer.class);
public static class ArgumentException extends Exception {
public ArgumentException(String s) {
super(s);
}
}
/**
* Construct a tokenizer for the specified string.
*
* @param str a string to be parsed.
*/
public ArgumentTokenizer(String str) {
currentPosition = 0;
this.str = str;
maxPosition = str.length();
}
/**
* Skip white space.
*/
protected void skipWhiteSpace() {
while ((currentPosition < maxPosition) &&
Character.isWhitespace(str.charAt(currentPosition))) {
currentPosition++;
}
}
/**
* Test if there are more tokens available from this tokenizer's string.
*
* @return true if there are more tokens available from this
* tokenizer's string; false otherwise.
*/
public boolean hasMoreTokens() {
skipWhiteSpace();
return (currentPosition < maxPosition);
}
/**
* Return the next token from this tokenizer.
*
* @return the next token from this tokenizer.
* @exception NoSuchElementException if there are no more tokens in this
* tokenizer's string.
*/
public String nextToken() throws ArgumentTokenizer.ArgumentException {
skipWhiteSpace();
if (currentPosition >= maxPosition) {
throw new NoSuchElementException(strings.get("token.noMoreTokens"));
}
return scanToken();
}
/**
* Return the next token starting at the current position,
* assuming whitespace has already been skipped.
*/
protected String scanToken() throws ArgumentTokenizer.ArgumentException {
while (currentPosition < maxPosition) {
char c = str.charAt(currentPosition++);
if (c == '"' || c == '\'') {
char quote = c;
while (currentPosition < maxPosition) {
c = str.charAt(currentPosition++);
if (c == '\\' && quote == '"') {
if (currentPosition >= maxPosition)
throw new ArgumentTokenizer.ArgumentException(
strings.get("token.escapeAtEOL"));
c = str.charAt(currentPosition++);
if (!(c == '\\' || c == '"' || c == '\''))
token.append('\\');
} else if (c == quote) {
break;
}
token.append(c);
}
if (c != quote)
throw new ArgumentTokenizer.ArgumentException(
strings.get("token.unbalancedQuotes"));
} else if (c == '\\') {
if (currentPosition >= maxPosition)
throw new ArgumentTokenizer.ArgumentException(
strings.get("token.escapeAtEOL"));
c = str.charAt(currentPosition++);
token.append(c);
} else if (Character.isWhitespace(c)) {
break;
} else {
token.append(c);
}
}
String s = token.toString();
token.setLength(0);
return s;
}
}