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1
23
24 package org.objectweb.jorm.naming.lib;
25
26 import org.objectweb.jorm.naming.api.PExceptionNameCoding;
27 import org.objectweb.jorm.naming.api.PNCStringCoder;
28
29 import java.text.DateFormat  ;
30 import java.text.ParseException ;
31 import java.util.Date ;
32 import java.math.BigInteger ;
33 import java.math.BigDecimal ;
34
35
49 public class BasicStringCoder implements PNCStringCoder {
50 private String toDecode = null;
51 private int nextToDecode = 0;
52 private StringBuffer toEncode = null;
53
54 public BasicStringCoder() {
55 toEncode = new StringBuffer (64);
56 }
57
58 public BasicStringCoder(String en) {
59 toDecode = en;
60 }
61
62 private byte hex2int(char c) throws PExceptionNameCoding {
63 if ((c >= '0') && (c <= '9'))
64 return (byte) (c - '0');
65 if ((c >= 'A') && (c <= 'F'))
66 return (byte) (c - 'A' + 10);
67 throw new PExceptionNameCoding("Cannot decode: wrong hexadecimal code.");
68 }
69
70 private void long2hexIntoSB(long l, char[] ev) {
71 for (int i = ev.length - 1; i >= 0; i--) {
72 byte b = (byte) (l & 0xF);
73 if (b < 10)
74 ev[i] = (char) (b + '0');
75 else
76 ev[i] = (char) (b - 10 + 'A');
77 l >>= 4;
78 }
79 for (int i = 0; i < ev.length; i++)
80 toEncode.append(ev[i]);
81 }
82
83 public byte getByte() throws PExceptionNameCoding {
84 if (toDecode == null)
85 throw new PExceptionNameCoding("Cannot decode: this is an encoder object.");
86 if ((nextToDecode + 2) > toDecode.length())
87 throw new PExceptionNameCoding("Cannot decode: no more data.");
88 byte res = (byte) (hex2int(toDecode.charAt(nextToDecode++)) << 4);
89 res += hex2int(toDecode.charAt(nextToDecode++));
90 return res;
91 }
92
93 public Byte getObyte() throws PExceptionNameCoding {
94 return new Byte (getByte());
95 }
96
97 public char getChar() throws PExceptionNameCoding {
98 if (toDecode == null)
99 throw new PExceptionNameCoding("Cannot decode: this is an encoder object.");
100 if ((nextToDecode + 1) > toDecode.length())
101 throw new PExceptionNameCoding("Cannot decode: no more data.");
102 char res = toDecode.charAt(nextToDecode++);
103 return res;
104 }
105
106 public Character getOchar() throws PExceptionNameCoding {
107 return new Character (getChar());
108 }
109
110 public short getShort() throws PExceptionNameCoding {
111 if (toDecode == null)
112 throw new PExceptionNameCoding("Cannot decode: this is an encoder object.");
113 if ((nextToDecode + 4) > toDecode.length())
114 throw new PExceptionNameCoding("Cannot decode: no more data.");
115 short res = 0;
116 for (int i = 0; i < 4; i++) {
117 res <<= 4;
118 res += hex2int(toDecode.charAt(nextToDecode++));
119 }
120 return res;
121 }
122
123 public Short getOshort() throws PExceptionNameCoding {
124 return new Short (getShort());
125 }
126
127 public int getInt() throws PExceptionNameCoding {
128 if (toDecode == null)
129 throw new PExceptionNameCoding("Cannot decode: this is an encoder object.");
130 if ((nextToDecode + 8) > toDecode.length())
131 throw new PExceptionNameCoding("Cannot decode: no more data.");
132 int res = 0;
133 for (int i = 0; i < 8; i++) {
134 res <<= 4;
135 res += hex2int(toDecode.charAt(nextToDecode++));
136 }
137 return res;
138 }
139
140 public Integer getOint() throws PExceptionNameCoding {
141 return new Integer (getInt());
142 }
143
144 public long getLong() throws PExceptionNameCoding {
145 if (toDecode == null)
146 throw new PExceptionNameCoding("Cannot decode: this is an encoder object.");
147 if ((nextToDecode + 16) > toDecode.length())
148 throw new PExceptionNameCoding("Cannot decode: no more data.");
149 long res = 0;
150 for (int i = 0; i < 16; i++) {
151 res <<= 4;
152 res += hex2int(toDecode.charAt(nextToDecode++));
153 }
154 return res;
155 }
156
157 public Long getOlong() throws PExceptionNameCoding {
158 return new Long (getLong());
159 }
160
161 public String getString() throws PExceptionNameCoding {
162 if (toDecode == null)
163 throw new PExceptionNameCoding("Cannot decode: this is an encoder object.");
164 int len = getShort();
165 if ((nextToDecode + len) > toDecode.length())
166 throw new PExceptionNameCoding("Cannot decode: no more data.");
167 String res = toDecode.substring(nextToDecode, nextToDecode + len);
168 nextToDecode += len;
169 return res;
170 }
171
172 public Date getDate() throws PExceptionNameCoding {
173 if (toDecode == null)
174 throw new PExceptionNameCoding("Cannot decode: this is an encoder object.");
175 int len = getByte();
176 if ((nextToDecode + len) > toDecode.length())
177 throw new PExceptionNameCoding("Cannot decode: no more data.");
178 try {
179 Date res = DateFormat.getDateTimeInstance().parse(toDecode.substring(nextToDecode, nextToDecode + len));
180 nextToDecode += len;
181 return res;
182 } catch (ParseException pe) {
183 throw new PExceptionNameCoding(pe, "Cannot decode: wrong Date format.");
184 }
185 }
186
187 public BigInteger getBigInteger() throws PExceptionNameCoding {
188 if (toDecode == null)
189 throw new PExceptionNameCoding("Cannot decode: this is an encoder object.");
190 int len = getByte();
191 if ((nextToDecode + len) > toDecode.length())
192 throw new PExceptionNameCoding("Cannot decode: no more data.");
193 BigInteger res = new BigInteger (toDecode.substring(nextToDecode, nextToDecode + len));
194 nextToDecode += len;
195 return res;
196 }
197
198 public BigDecimal getBigDecimal() throws PExceptionNameCoding {
199 if (toDecode == null)
200 throw new PExceptionNameCoding("Cannot decode: this is an encoder object.");
201 int len = getByte();
202 if ((nextToDecode + len) > toDecode.length())
203 throw new PExceptionNameCoding("Cannot decode: no more data.");
204 BigDecimal res = new BigDecimal (toDecode.substring(nextToDecode, nextToDecode + len));
205 nextToDecode += len;
206 return res;
207 }
208
209 public byte[] getByteArray() throws PExceptionNameCoding {
210 if (toDecode == null)
211 throw new PExceptionNameCoding("Cannot decode: this is an encoder object.");
212 int len = getByte();
213 if ((nextToDecode + len) > toDecode.length())
214 throw new PExceptionNameCoding("Cannot decode: no more data.");
215 return new byte[0];
217 }
218
219 public char[] getCharArray() throws PExceptionNameCoding {
220 if (toDecode == null)
221 throw new PExceptionNameCoding("Cannot decode: this is an encoder object.");
222 int len = getByte();
223 if ((nextToDecode + len) > toDecode.length())
224 throw new PExceptionNameCoding("Cannot decode: no more data.");
225 return new char[0];
227 }
228
229 public void putByte(byte val) throws PExceptionNameCoding {
230 if (toEncode == null)
231 throw new PExceptionNameCoding("Cannot encode: this is a decoder object.");
232 long2hexIntoSB(val, new char[2]);
233 }
234
235 public void putObyte(Byte val) throws PExceptionNameCoding {
236 putByte(val.byteValue());
237 }
238
239 public void putChar(char val) throws PExceptionNameCoding {
240 if (toEncode == null)
241 throw new PExceptionNameCoding("Cannot encode: this is a decoder object.");
242 toEncode.append(val);
243 }
244
245 public void putOchar(Character val) throws PExceptionNameCoding {
246 putChar(val.charValue());
247 }
248
249 public void putShort(short val) throws PExceptionNameCoding {
250 if (toEncode == null)
251 throw new PExceptionNameCoding("Cannot encode: this is a decoder object.");
252 long2hexIntoSB(val, new char[4]);
253 }
254
255 public void putOshort(Short val) throws PExceptionNameCoding {
256 putShort(val.shortValue());
257 }
258
259 public void putInt(int val) throws PExceptionNameCoding {
260 if (toEncode == null)
261 throw new PExceptionNameCoding("Cannot encode: this is a decoder object.");
262 long2hexIntoSB(val, new char[8]);
263 }
264
265 public void putOint(Integer val) throws PExceptionNameCoding {
266 putInt(val.intValue());
267 }
268
269 public void putLong(long val) throws PExceptionNameCoding {
270 if (toEncode == null)
271 throw new PExceptionNameCoding("Cannot encode: this is a decoder object.");
272 long2hexIntoSB(val, new char[16]);
273 }
274
275 public void putOlong(Long val) throws PExceptionNameCoding {
276 putLong(val.longValue());
277 }
278
279 public void putString(String val) throws PExceptionNameCoding {
280 if (toEncode == null)
281 throw new PExceptionNameCoding("Cannot encode: this is a decoder object.");
282 if (val.length() > Short.MAX_VALUE)
283 throw new PExceptionNameCoding("Cannot encode: String field too long.");
284 putShort((short) val.length());
285 toEncode.append(val);
286 }
287
288 public void putDate(Date val) throws PExceptionNameCoding {
289 if (toEncode == null)
290 throw new PExceptionNameCoding("Cannot encode: this is a decoder object.");
291 String ds = DateFormat.getDateTimeInstance().format(val);
292 if (ds.length() > Byte.MAX_VALUE)
293 throw new PExceptionNameCoding("Cannot encode: Date field too long.");
294 putByte((byte) ds.length());
295 toEncode.append(ds);
296 }
297
298 public void putBigInteger(BigInteger val) throws PExceptionNameCoding {
299 if (toEncode == null)
300 throw new PExceptionNameCoding("Cannot encode: this is a decoder object.");
301 String ds = val.toString();
302 if (ds.length() > Byte.MAX_VALUE)
303 throw new PExceptionNameCoding("Cannot encode: BigInteger field too long.");
304 putByte((byte) ds.length());
305 toEncode.append(ds);
306 }
307
308 public void putBigDecimal(BigDecimal val) throws PExceptionNameCoding {
309 if (toEncode == null)
310 throw new PExceptionNameCoding("Cannot encode: this is a decoder object.");
311 String ds = val.toString();
312 if (ds.length() > Byte.MAX_VALUE)
313 throw new PExceptionNameCoding("Cannot encode: BigDecimal field too long.");
314 putByte((byte) ds.length());
315 toEncode.append(ds);
316 }
317
318 public void putByteArray(byte[] va) throws PExceptionNameCoding {
319 if (toEncode == null)
320 throw new PExceptionNameCoding("Cannot encode: this is a decoder object.");
321 }
323
324 public void putCharArray(char[] val) throws PExceptionNameCoding {
325 if (toEncode == null)
326 throw new PExceptionNameCoding("Cannot encode: this is a decoder object.");
327 }
329
330 public String getStringCode() throws PExceptionNameCoding {
331 if (toEncode == null)
332 throw new PExceptionNameCoding("Cannot encode: this is a decoder object.");
333 return toEncode.toString();
334 }
335 }
336 |
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