infinispan.com.mchange.util.impl.QuotesAndWhitespaceTokenizer Maven / Gradle / Ivy
/*
* Distributed as part of mchange-commons-java 0.2.7
*
* Copyright (C) 2014 Machinery For Change, Inc.
*
* Author: Steve Waldman
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of EITHER:
*
* 1) The GNU Lesser General Public License (LGPL), version 2.1, as
* published by the Free Software Foundation
*
* OR
*
* 2) The Eclipse Public License (EPL), version 1.0
*
* You may choose which license to accept if you wish to redistribute
* or modify this work. You may offer derivatives of this work
* under the license you have chosen, or you may provide the same
* choice of license which you have been offered here.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received copies of both LGPL v2.1 and EPL v1.0
* along with this software; see the files LICENSE-EPL and LICENSE-LGPL.
* If not, the text of these licenses are currently available at
*
* LGPL v2.1: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* EPL v1.0: http://www.eclipse.org/org/documents/epl-v10.php
*
*/
package com.mchange.util.impl;
import java.util.*;
import com.mchange.util.*;
public class QuotesAndWhitespaceTokenizer extends StringEnumerationHelperBase
{
Object current;
LinkedList list = new LinkedList();
public QuotesAndWhitespaceTokenizer(String string) throws IllegalArgumentException
{
int i = 0;
int len = string.length();
while (i < len)
{
int q = string.indexOf ('"', i);
if (q >= 0)
{
StringTokenizer toks = new StringTokenizer(string.substring(i, q));
if (toks.hasMoreTokens()) list.add(toks);
int q2 = string.indexOf('"', q + 1);
if (q2 == -1)
throw new IllegalArgumentException("Badly quoted string: " + string);
list.add(string.substring(q + 1, q2));
i = q2 + 1;
}
else
{
StringTokenizer toks = new StringTokenizer(string.substring(i));
if (toks.hasMoreTokens()) list.add(toks);
break;
}
}
advance();
}
public synchronized boolean hasMoreStrings()
{return current != null;}
public synchronized String nextString()
{
if (current instanceof String)
{
String out = (String) current;
advance();
return out;
}
else
{
StringTokenizer toks = (StringTokenizer) current;
String out = toks.nextToken();
if (!toks.hasMoreTokens()) advance();
return out;
}
}
private void advance()
{
if (list.isEmpty())
current = null;
else
{
current = list.getFirst();
list.removeFirst();
}
}
public static void main(String[] argv)
{
String test = "\t \n\r";
//String test = "This is \"only a\" frigging \t\"test\".";
for (StringEnumeration se = new QuotesAndWhitespaceTokenizer(test); se.hasMoreStrings();)
System.out.println(se.nextString());
}
}