|
1
36 package org.columba.ristretto.io;
37
38 import java.io.IOException  ;
39
40
46 public class CharSequenceSource implements Source {
47
48 private CharSequence source;
49 private int start,end;
50 private int pos;
51
52
57 public CharSequenceSource( CharSequence source ) {
58 this.source = source;
59 pos = 0;
60 start = 0;
61 end = source.length();
62 }
63
64
67 public Source subSource(int start, int end) {
68 CharSequenceSource subsource = new CharSequenceSource(source);
69 subsource.start = this.start + start;
70 subsource.end = this.start + end;
71 subsource.pos = 0;
72 return subsource;
73 }
74
75
78 public CharSequence subSequence( int start, int end) {
79 return subSource(start, end);
80 }
81
82
85 public Source fromActualPosition() {
86 CharSequenceSource subsource = new CharSequenceSource(source);
87 subsource.start = start + pos;
88 subsource.end = end;
89 subsource.pos = 0;
90 return subsource;
91 }
92
93
96 public int getPosition() {
97 return pos;
98 }
99
100
103 public void seek(int position) throws IOException {
104 pos = position;
105 }
106
107
110 public char next() throws IOException {
111 return source.charAt(start + pos++);
112 }
113
114
117 public int length() {
118 return end - start;
119 }
120
121
124 public char charAt(int arg0) {
125 try {
126 pos = arg0;
127 return next();
128 } catch (IOException e) {
129 e.printStackTrace();
130 return 0;
131 }
132 }
133
134
135
138 public String toString() {
139 if (length() < 0) return "";
140 StringBuffer buffer = new StringBuffer (length());
141 for( int i=0; i < length(); i++) {
142 buffer.append(charAt(i));
143 }
144 return buffer.toString();
145 }
146
147
150 public boolean isEOF() {
151 return pos == end;
152 }
153
154
157 public void close() throws IOException {
158 source = null;
159 }
160
161
164 public void deepClose() throws IOException {
165 close();
166 }
167 }
168 |
Popular Tags |
Java API By Example, From Geeks To Geeks.