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33 package com.sun.enterprise.admin.util;
34
35 import java.util.NoSuchElementException  ;
36
37 public class QuotedStringTokenizer
38 {
39 private final char[] ca;
40 private String delimiters = "\t ";
41 private final int numTokens;
42 private int curToken = 0;
43 private final CharIterator iterator;
44
45 public QuotedStringTokenizer(String s)
46 {
47 this(s, null);
48 }
49
50 public QuotedStringTokenizer(String s, String delim)
51 {
52 if (null == s)
53 {
54 throw new IllegalArgumentException ("null param");
55 }
56 ca = s.toCharArray();
57 if (delim != null && delim.length() > 0)
58 {
59 delimiters = delim;
60 }
61 numTokens = _countTokens();
62 iterator = new CharIterator(ca);
63 }
64
65 public int countTokens()
66 {
67 return numTokens;
68 }
69
70 public boolean hasMoreTokens()
71 {
72 return curToken < numTokens;
73 }
74
75 public String nextToken()
76 {
77 if (curToken == numTokens)
78 throw new NoSuchElementException ();
79 final StringBuffer sb = new StringBuffer ();
80 boolean bQuote = false;
81 boolean bEscaped = false;
82 char c;
83 while ((c = iterator.next()) != CharIterator.EOF)
84 {
85 boolean isDelimiter = isDelimiter(c);
86 if (!isDelimiter && !bEscaped)
87 {
88 sb.append(c);
89 if (c == '\"')
90 bQuote = !bQuote;
91 char next = iterator.peekNext();
92 if (next == CharIterator.EOF || (isDelimiter(next) && !bQuote))
93 break;
94 }
95 else if (bQuote || bEscaped)
96 {
97 sb.append(c);
98 }
99 if(c=='\\')
100 bEscaped = !bEscaped;
101 else
102 bEscaped = false;
103 }
104 curToken++;
105 return sb.toString();
106 }
107
108 boolean isDelimiter(char c)
109 {
110 return delimiters.indexOf(c) >= 0;
111 }
112
113 private int _countTokens()
114 {
115 int tokens = 0;
116 boolean bQuote = false;
117 boolean bEscaped = false;
118 final CharIterator it = new CharIterator(ca);
119 char c;
120
121 while ((c = it.next()) != CharIterator.EOF)
122 {
123 char next = it.peekNext();
124 if (!isDelimiter(c) && !bEscaped)
125 {
126 if (c == '\"')
127 bQuote = !bQuote;
128 if (next == CharIterator.EOF || (isDelimiter(next) && !bQuote))
129 tokens++;
130 }
131 else if (next == CharIterator.EOF && bQuote) tokens++;
133 if(c=='\\')
134 bEscaped = !bEscaped;
135 else
136 bEscaped = false;
137 }
138 return tokens;
139 }
140
141 private static final class CharIterator
142 {
143 static final char EOF = '\uFFFF';
144
145 private final char[] carr;
146 private int index = 0;
147
148 private CharIterator(char[] ca)
149 {
150 carr = ca;
151 }
152
153 char next()
154 {
155 if (index >= carr.length)
156 return EOF;
157 char c = carr[index];
158 ++index;
159 return c;
160 }
161
162 char peekNext()
163 {
164 if (index >= carr.length)
165 return EOF;
166 return carr[index];
167 }
168 }
169 }
170 |
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