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1
9
10 package org.jboss.portal.format.parser.chars;
11
12 import java.io.CharArrayReader  ;
13 import java.io.IOException ;
14 import java.io.Reader ;
15 import java.io.Writer ;
16
17
21 public class MutableChars implements Chars
22 {
23
24 protected int index;
25 protected char[] chars;
26 protected Writer writer;
27
28 public MutableChars(int length)
29 {
30 this(new char[length]);
31 }
32
33 public MutableChars()
34 {
35 this(20);
36 }
37
38 public MutableChars(char[] chars)
39 {
40 this.index = 0;
41 this.chars = chars;
42 this.writer = new MyWriter();
43 }
44
45 public MutableChars(String s)
46 {
47 this(s.toCharArray());
48 }
49
50 private void increase()
51 {
52 char[] temp = new char[1 + chars.length * 2];
53 System.arraycopy(chars, 0, temp, 0, chars.length);
54 chars = temp;
55 }
56
57 public MutableChars append(String s)
58 {
59 int mark = index;
60 index += s.length();
61 while (index > chars.length - 1)
62 {
63 increase();
64 }
65 s.getChars(0, s.length(), chars, mark);
66 return this;
67 }
68
69 public MutableChars append(char cbuf[], int off, int len)
70 {
71 int mark = index;
72 index += len;
73 while (index > chars.length - 1)
74 {
75 increase();
76 }
77 System.arraycopy(cbuf, off, chars, mark, len);
78 return this;
79 }
80
81 public MutableChars append(char c)
82 {
83 if (index > chars.length - 1) {
85 increase();
86 }
87 chars[index++] = c;
88 return this;
89 }
90
91 public void reset()
92 {
93 index = 0;
94 }
95
96 public void appendTo(Writer writer) throws IOException
97 {
98 writer.write(chars, 0, index);
99 }
100
101 public String toString()
102 {
103 return new String (chars, 0, index);
104 }
105
106 public Reader getReader()
107 {
108 return new CharArrayReader (chars, 0, index);
109 }
110
111 public int length()
112 {
113 return index;
114 }
115
116 public Writer getWriter()
117 {
118 return writer;
119 }
120
121 public char[] chars()
122 {
123 return chars;
124 }
125
126 public class MyWriter extends Writer
127 {
128 public void write(char cbuf[], int off, int len) throws IOException
129 {
130 MutableChars.this.append(cbuf, off, len);
131 }
132 public void flush() throws IOException
133 {
134 }
135 public void close() throws IOException
136 {
137 }
138 }
139 }
140 |
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