com.sun.enterprise.admin.util.QuotedStringTokenizer Maven / Gradle / Ivy
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package com.sun.enterprise.admin.util;
import java.util.NoSuchElementException;
public class QuotedStringTokenizer
{
private final char[] ca;
private String delimiters = "\t ";
private final int numTokens;
private int curToken = 0;
private final CharIterator iterator;
public QuotedStringTokenizer(String s)
{
this(s, null);
}
public QuotedStringTokenizer(String s, String delim)
{
if (null == s)
{
throw new IllegalArgumentException("null param");
}
ca = s.toCharArray();
if (delim != null && delim.length() > 0)
{
delimiters = delim;
}
numTokens = _countTokens();
iterator = new CharIterator(ca);
}
public int countTokens()
{
return numTokens;
}
public boolean hasMoreTokens()
{
return curToken < numTokens;
}
public String nextToken()
{
if (curToken == numTokens)
throw new NoSuchElementException();
final StringBuffer sb = new StringBuffer();
boolean bQuote = false;
boolean bEscaped = false;
char c;
while ((c = iterator.next()) != CharIterator.EOF)
{
boolean isDelimiter = isDelimiter(c);
if (!isDelimiter && !bEscaped)
{
sb.append(c);
if (c == '\"')
bQuote = !bQuote;
char next = iterator.peekNext();
if (next == CharIterator.EOF || (isDelimiter(next) && !bQuote))
break;
}
else if (bQuote || bEscaped)
{
sb.append(c);
}
if(c=='\\')
bEscaped = !bEscaped;
else
bEscaped = false;
}
curToken++;
return sb.toString();
}
boolean isDelimiter(char c)
{
return delimiters.indexOf(c) >= 0;
}
private int _countTokens()
{
int tokens = 0;
boolean bQuote = false;
boolean bEscaped = false;
final CharIterator it = new CharIterator(ca);
char c;
while ((c = it.next()) != CharIterator.EOF)
{
char next = it.peekNext();
if (!isDelimiter(c) && !bEscaped)
{
if (c == '\"')
bQuote = !bQuote;
if (next == CharIterator.EOF || (isDelimiter(next) && !bQuote))
tokens++;
}
else if (next == CharIterator.EOF && bQuote) //eg :- "\" "
tokens++;
if(c=='\\')
bEscaped = !bEscaped;
else
bEscaped = false;
}
return tokens;
}
private static final class CharIterator
{
static final char EOF = '\uFFFF';
private final char[] carr;
private int index = 0;
private CharIterator(char[] ca)
{
carr = ca;
}
char next()
{
if (index >= carr.length)
return EOF;
char c = carr[index];
++index;
return c;
}
char peekNext()
{
if (index >= carr.length)
return EOF;
return carr[index];
}
}
}