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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* ident "%Z%%M% %I% %E% SMI"
*
* Copyright 2002 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
*/
/**
* This is a replacement for StringTokenizer since there
* is an incompatibility between JDK 1.2 and JDK 1.3.1
* and beyond which breaks slp.jar support for apps which
* could use either JDK.
*/
package com.sun.slp;
import java.util.Enumeration;
import java.util.NoSuchElementException;
public class SLPTokenizer implements Enumeration
{
private String str;
private String delims;
private boolean bRetDel;
private int index;
private void initialize(String s, String d, boolean b)
{
str = s;
delims = d;
bRetDel = b;
index = 0;
}
public SLPTokenizer(String s)
{
initialize(s, "", false);
}
public SLPTokenizer(String s, String delim)
{
initialize(s, delim, false);
}
public SLPTokenizer(String s, String delim, boolean returnDelims)
{
initialize(s, delim, returnDelims);
}
/**
* Calculates the number of times that this tokenizer's
* nextToken method can be called before it generates an
* exception.
*/
public int countTokens()
{
int i = 0;
if (str.length() < 1) {
return 0;
}
char c = str.charAt(0);
boolean inToken = false;
// a token starts if
// (a) next character is a non delimiter
// (b) there are more characters
for (int j = 0; j < str.length(); j++)
{
c = str.charAt(j);
if (delims.indexOf(c) != -1) {
if (bRetDel) {
i++;
}
if (inToken == true) {
i++; // we were in a token, now completed it
inToken = false;
}
} else {
// To get here, we must be in a token.
inToken = true;
}
}
if (inToken) {
i++;
}
return i;
}
/**
* Returns the same value as the hasMoreTokens method.
*/
public boolean hasMoreElements()
{
if (str.length() < 1) {
return false;
}
if (index >= str.length()) {
return false;
}
if (bRetDel == false) {
// Check to see if all there is left are delimiters.
// If so there are no more elements.
for (int i = index; i < str.length(); i++) {
if (delims.indexOf(str.charAt(i)) == -1) {
return true; // A non-delim char found!
}
}
return false; // No non-delim chars remain!
}
return true; // Something remains.
}
/**
* Tests if there are more tokens available from this
* tokenizer's string.
*/
public boolean hasMoreTokens()
{
return hasMoreElements();
}
/**
* Returns the same value as the nextToken method,
* except that its declared return value is Object
* rather than String.
*/
public Object nextElement()
throws NoSuchElementException
{
return (Object) nextToken();
}
/**
* Returns the next token from this string tokenizer.
*
*/
public String nextToken()
throws NoSuchElementException
{
if (index >= str.length()) throw new NoSuchElementException();
StringBuffer sb = new StringBuffer();
char c = str.charAt(index);
if (bRetDel == true)
{
if (delims.indexOf(c) != -1) {
// We begin at a delimiter. Return it & advance over.
sb.append(str.charAt(index));
index++;
return sb.toString();
} else {
// Advance to next delimiter and stop. Return string.
while (index < str.length()) {
c = str.charAt(index);
if (delims.indexOf(c) != -1) {
return sb.toString();
} else {
sb.append(c);
}
index++;
}
// We get here only if this is the last token.
return sb.toString();
}
} else {
// 3 cases
// token till the end
// token till a delimiter
// only delimiters till the end (exception!)
while (index < str.length()) {
c = str.charAt(index);
if (delims.indexOf(c) != -1) {
if (sb.length() != 0) {
index++; // Skip past the delimiter.
return sb.toString();
}
index++; // Do not include delimiters if no content yet.
} else { // Not the delimiter yet.
sb.append(c);
index++;
}
}
if (sb.length() == 0) {
throw new NoSuchElementException();
}
return sb.toString();
}
}
/**
* Returns the next token in this string tokenizer's string.
*/
public String nextToken(String delim)
throws NoSuchElementException
{
String saveDelims = delims;
delims = delim;
try
{
// This is not thread safe, but it will String.
// There are no guarantees StringTokenizer is
// thread safe either.
String ret = nextToken();
delims = saveDelims;
return ret;
}
catch (NoSuchElementException nsee)
{
delims = saveDelims;
throw nsee;
}
}
}
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