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*
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* accompanied this code).
*
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package jdk.nashorn.internal.runtime;
import java.util.LinkedList;
import java.util.Stack;
import java.util.StringTokenizer;
/**
* A string tokenizer that supports entries with quotes and nested quotes. If
* the separators are quoted either by ' and ", or whatever quotes the user
* supplies they will be ignored and considered part of another token
*/
public final class QuotedStringTokenizer {
private final LinkedList<String> tokens;
private final char quotes[];
/**
* Constructor
*
* @param str string to tokenize
*/
public QuotedStringTokenizer(final String str) {
this(str, " ");
}
/**
* Create a quoted string tokenizer
*
* @param str
* a string to tokenize
* @param delim
* delimiters between tokens
*
*/
public QuotedStringTokenizer(final String str, final String delim) {
this(str, delim, new char[] { '"', '\'' });
}
/**
* Create a quoted string tokenizer
*
* @param str
* a string to tokenize
* @param delim
* delimiters between tokens
* @param quotes
* all the characters that should be accepted as quotes, default
* is ' or "
*/
private QuotedStringTokenizer(final String str, final String delim, final char[] quotes) {
this.quotes = quotes;
boolean delimIsWhitespace = true;
for (int i = 0; i < delim.length(); i++) {
if (!Character.isWhitespace(delim.charAt(i))) {
delimIsWhitespace = false;
break;
}
}
final StringTokenizer st = new StringTokenizer(str, delim);
tokens = new LinkedList<>();
while (st.hasMoreTokens()) {
String token = st.nextToken();
while (unmatchedQuotesIn(token)) {
if (!st.hasMoreTokens()) {
throw new IndexOutOfBoundsException(token);
}
token += (delimIsWhitespace ? " " : delim) + st.nextToken();
}
tokens.add(stripQuotes(token));
}
}
/**
* @return the number of tokens in the tokenizer
*/
public int countTokens() {
return tokens.size();
}
/**
* @return true if there are tokens left
*/
public boolean hasMoreTokens() {
return countTokens() > 0;
}
/**
* @return the next token in the tokenizer
*/
public String nextToken() {
return tokens.removeFirst();
}
private String stripQuotes(final String value0) {
String value = value0.trim();
for (final char q : quotes) {
if (value.length() >= 2 && value.startsWith("" + q) && value.endsWith("" + q)) {
// also go over the value and remove \q sequences. they are just
// plain q now
value = value.substring(1, value.length() - 1);
value = value.replace("\\" + q, "" + q);
}
}
return value;
}
private boolean unmatchedQuotesIn(final String str) {
final Stack<Character> quoteStack = new Stack<>();
for (int i = 0; i < str.length(); i++) {
final char c = str.charAt(i);
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