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Viewing changes to TuxGuitar-compat/src/org/herac/tuxguitar/io/tg/v09/TGInputStream.java

  • Committer: Bazaar Package Importer
  • Author(s): Philippe Coval
  • Date: 2008-06-19 00:30:30 UTC
  • mto: (5.1.2 sid)
  • mto: This revision was merged to the branch mainline in revision 3.
  • Revision ID: james.westby@ubuntu.com-20080619003030-h719szrhsngou7c6
Tags: upstream-1.0
Import upstream version 1.0

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TuxGuitar-compat/src/org/herac/tuxguitar/io/tg/v09/TGInputStream.java
 
1
/*
 
2
 * Created on 16-dic-2005
 
3
 *
 
4
 * TODO To change the template for this generated file go to
 
5
 * Window - Preferences - Java - Code Style - Code Templates
 
6
 */
 
7
package org.herac.tuxguitar.io.tg.v09;
 
8
 
 
9
import java.io.DataInputStream;
 
10
import java.io.IOException;
 
11
import java.io.InputStream;
 
12
 
 
13
import org.herac.tuxguitar.io.base.TGFileFormat;
 
14
import org.herac.tuxguitar.io.base.TGFileFormatException;
 
15
import org.herac.tuxguitar.io.base.TGInputStreamBase;
 
16
import org.herac.tuxguitar.song.factory.TGFactory;
 
17
import org.herac.tuxguitar.song.models.TGBeat;
 
18
import org.herac.tuxguitar.song.models.TGChannel;
 
19
import org.herac.tuxguitar.song.models.TGColor;
 
20
import org.herac.tuxguitar.song.models.TGDuration;
 
21
import org.herac.tuxguitar.song.models.TGLyric;
 
22
import org.herac.tuxguitar.song.models.TGMarker;
 
23
import org.herac.tuxguitar.song.models.TGMeasure;
 
24
import org.herac.tuxguitar.song.models.TGMeasureHeader;
 
25
import org.herac.tuxguitar.song.models.TGNote;
 
26
import org.herac.tuxguitar.song.models.TGNoteEffect;
 
27
import org.herac.tuxguitar.song.models.TGSong;
 
28
import org.herac.tuxguitar.song.models.TGString;
 
29
import org.herac.tuxguitar.song.models.TGTempo;
 
30
import org.herac.tuxguitar.song.models.TGTimeSignature;
 
31
import org.herac.tuxguitar.song.models.TGTrack;
 
32
import org.herac.tuxguitar.song.models.TGTupleto;
 
33
import org.herac.tuxguitar.song.models.TGVelocities;
 
34
import org.herac.tuxguitar.song.models.effects.TGEffectBend;
 
35
import org.herac.tuxguitar.song.models.effects.TGEffectGrace;
 
36
import org.herac.tuxguitar.song.models.effects.TGEffectHarmonic;
 
37
import org.herac.tuxguitar.song.models.effects.TGEffectTremoloBar;
 
38
import org.herac.tuxguitar.song.models.effects.TGEffectTremoloPicking;
 
39
import org.herac.tuxguitar.song.models.effects.TGEffectTrill;
 
40
 
 
41
/**
 
42
 * @author julian
 
43
 *
 
44
 * TODO To change the template for this generated type comment go to
 
45
 * Window - Preferences - Java - Code Style - Code Templates
 
46
 */
 
47
public class TGInputStream extends TGStream implements TGInputStreamBase{
 
48
        
 
49
        private DataInputStream dataInputStream;
 
50
        private String version;
 
51
        private TGFactory factory;
 
52
        
 
53
        private int velocity;
 
54
        
 
55
        public TGInputStream() {
 
56
                super();
 
57
        }
 
58
        
 
59
        public void init(TGFactory factory,InputStream stream) {
 
60
                this.factory = factory;
 
61
                this.dataInputStream = new DataInputStream(stream);
 
62
                this.version = null;
 
63
        }
 
64
        
 
65
        public TGFileFormat getFileFormat(){
 
66
                return new TGFileFormat("TuxGuitar","*.tg");
 
67
        }
 
68
        
 
69
        public boolean isSupportedVersion(String version){
 
70
                return (version.equals(TG_VERSION));
 
71
        }
 
72
        
 
73
        public boolean isSupportedVersion(){
 
74
                try{
 
75
                        readVersion();
 
76
                        return isSupportedVersion(this.version);
 
77
                }catch(Throwable throwable){
 
78
                        return false;
 
79
                }
 
80
        }
 
81
        
 
82
        private void readVersion(){
 
83
                if(this.version == null){
 
84
                        this.version = readString();
 
85
                }
 
86
        }
 
87
        
 
88
        public TGSong readSong() throws TGFileFormatException{
 
89
                try {
 
90
                        if(this.isSupportedVersion()){
 
91
                                TGSong song = this.read();
 
92
                                this.dataInputStream.close();
 
93
                                return song;
 
94
                        }
 
95
                        throw new TGFileFormatException("Unsopported Version");
 
96
                } catch (Throwable throwable) {
 
97
                        throw new TGFileFormatException(throwable);
 
98
                }
 
99
        }
 
100
        
 
101
        private TGSong read(){
 
102
                TGSong song = this.factory.newSong();
 
103
                
 
104
                //leo el nombre
 
105
                song.setName(readString());
 
106
                
 
107
                //leo el artista
 
108
                song.setArtist(readString());
 
109
                
 
110
                //leo el album
 
111
                song.setAlbum(readString());
 
112
                
 
113
                //leo el autor
 
114
                song.setAuthor(readString());
 
115
                
 
116
                //leo la cantidad de measure headers
 
117
                int headerCount = readShort();
 
118
                
 
119
                //leo las pistas
 
120
                long headerStart = TGDuration.QUARTER_TIME;
 
121
                TGMeasureHeader lastHeader = null;
 
122
                for(int i = 0;i < headerCount;i++){
 
123
                        TGMeasureHeader header = readMeasureHeader(i + 1,headerStart,lastHeader);
 
124
                        song.addMeasureHeader(header);
 
125
                        headerStart += header.getLength();
 
126
                        lastHeader = header;
 
127
                }
 
128
                
 
129
                //leo la cantidad de pistas
 
130
                int trackCount = readByte();
 
131
                
 
132
                //leo las pistas
 
133
                for(int i = 0;i < trackCount;i++){
 
134
                        song.addTrack(readTrack(i + 1,song) );
 
135
                }
 
136
                
 
137
                return song;
 
138
        }
 
139
        
 
140
        private TGTrack readTrack(int number,TGSong song){
 
141
                //header
 
142
                int header = readHeader();
 
143
                
 
144
                TGTrack track = this.factory.newTrack();
 
145
                
 
146
                track.setNumber(number);
 
147
                
 
148
                //leo el nombre
 
149
                track.setName( readString() );
 
150
                
 
151
                //leo el canal
 
152
                readChannel(track.getChannel());
 
153
                
 
154
                //leo la cantidad de compases
 
155
                int measureCount = song.countMeasureHeaders();
 
156
                
 
157
                //leo los compases
 
158
                TGMeasure lastMeasure = null;
 
159
                for(int i = 0;i < measureCount;i++){
 
160
                        TGMeasure measure = readMeasure(song.getMeasureHeader(i),lastMeasure);
 
161
                        track.addMeasure(measure);
 
162
                        lastMeasure = measure;
 
163
                }
 
164
                
 
165
                //leo la cantidad de cuerdas
 
166
                int stringCount = readByte();
 
167
                
 
168
                //leo las cuerdas
 
169
                for(int i = 0;i < stringCount;i++){
 
170
                        track.getStrings().add(readInstrumentString(i + 1));
 
171
                }
 
172
                
 
173
                //leo el offset
 
174
                track.setOffset( (TGTrack.MIN_OFFSET + readByte()) );
 
175
                
 
176
                //leo el color
 
177
                readColor(track.getColor());
 
178
                
 
179
                //leo el lyrics
 
180
                if(((header & TRACK_LYRICS) != 0)){
 
181
                        readLyrics(track.getLyrics());
 
182
                }
 
183
                
 
184
                return track;
 
185
        }
 
186
        
 
187
        private TGMeasureHeader readMeasureHeader(int number,long start,TGMeasureHeader lastMeasureHeader){
 
188
                int header = readHeader();
 
189
                
 
190
                TGMeasureHeader measureHeader = this.factory.newHeader();
 
191
                measureHeader.setNumber(number);
 
192
                measureHeader.setStart(start);
 
193
                
 
194
                //leo el time signature
 
195
                if(((header & MEASURE_HEADER_TIMESIGNATURE) != 0)){
 
196
                        readTimeSignature(measureHeader.getTimeSignature());
 
197
                }else if(lastMeasureHeader != null){
 
198
                        lastMeasureHeader.getTimeSignature().copy(measureHeader.getTimeSignature());
 
199
                }
 
200
                
 
201
                //leo el tempo
 
202
                if(((header & MEASURE_HEADER_TEMPO) != 0)){
 
203
                        readTempo(measureHeader.getTempo());
 
204
                }else if(lastMeasureHeader != null){
 
205
                        lastMeasureHeader.getTempo().copy(measureHeader.getTempo());
 
206
                }
 
207
                
 
208
                //leo el comienzo de la repeticion
 
209
                measureHeader.setRepeatOpen((header & MEASURE_HEADER_OPEN_REPEAT) != 0);
 
210
                
 
211
                //leo el numero de repeticiones
 
212
                if(((header & MEASURE_HEADER_CLOSE_REPEAT) != 0)){
 
213
                        measureHeader.setRepeatClose(readShort());
 
214
                }
 
215
                
 
216
                //leo el marker
 
217
                if(((header & MEASURE_HEADER_MARKER) != 0)){
 
218
                        measureHeader.setMarker(readMarker(number));
 
219
                }
 
220
                
 
221
                measureHeader.setTripletFeel ((lastMeasureHeader != null)?lastMeasureHeader.getTripletFeel():TGMeasureHeader.TRIPLET_FEEL_NONE);
 
222
                if(((header & MEASURE_HEADER_TRIPLET_FEEL) != 0)){
 
223
                        measureHeader.setTripletFeel( readByte() );
 
224
                }
 
225
                
 
226
                return measureHeader;
 
227
        }
 
228
        
 
229
        private TGMeasure readMeasure(TGMeasureHeader measureHeader,TGMeasure lastMeasure){
 
230
                this.velocity = TGVelocities.DEFAULT;
 
231
                
 
232
                int header = readHeader();
 
233
                
 
234
                TGMeasure measure = this.factory.newMeasure(measureHeader);
 
235
                
 
236
                //leo la cantidad de componentes
 
237
                TGBeat previous = null;
 
238
                int componentCount = readShort();
 
239
                for(int i = 0;i < componentCount;i++){
 
240
                        previous = readComponent(measure,previous);
 
241
                }
 
242
                
 
243
                //leo la clave
 
244
                measure.setClef( (lastMeasure == null)?TGMeasure.CLEF_TREBLE:lastMeasure.getClef());
 
245
                if(((header & MEASURE_CLEF) != 0)){
 
246
                        measure.setClef( readByte() );
 
247
                }
 
248
                
 
249
                //leo el key signature
 
250
                measure.setKeySignature((lastMeasure == null)?0:lastMeasure.getKeySignature());
 
251
                if(((header & MEASURE_KEYSIGNATURE) != 0)){
 
252
                        measure.setKeySignature(readByte());
 
253
                }
 
254
                
 
255
                return measure;
 
256
                
 
257
        }
 
258
        
 
259
        private void readChannel(TGChannel channel){
 
260
                int header = readHeader();
 
261
                
 
262
                //leo el canal
 
263
                channel.setChannel( (short)readByte() );
 
264
                
 
265
                //leo el canal de efectos
 
266
                channel.setEffectChannel( (short)readByte() );
 
267
                
 
268
                //leo el instrumento
 
269
                channel.setInstrument( (short)readByte() );
 
270
                
 
271
                //leo el volumen
 
272
                channel.setVolume( (short)readByte() );
 
273
                
 
274
                //leo el balance
 
275
                channel.setBalance( (short)readByte() );
 
276
                
 
277
                //leo el chorus
 
278
                channel.setChorus( (short)readByte() );
 
279
                
 
280
                //leo el reverb
 
281
                channel.setReverb( (short)readByte() );
 
282
                
 
283
                //leo el phaser
 
284
                channel.setPhaser( (short)readByte() );
 
285
                
 
286
                //leo el tremolo
 
287
                channel.setTremolo( (short)readByte() );
 
288
                
 
289
                //leo el solo
 
290
                channel.setSolo( ((header & CHANNEL_SOLO) != 0) );
 
291
                
 
292
                //leo el mute
 
293
                channel.setMute( ((header & CHANNEL_MUTE) != 0) );
 
294
        }
 
295
        
 
296
        private TGBeat readComponent(TGMeasure measure,TGBeat previous){
 
297
                TGBeat beat = previous;
 
298
                
 
299
                int header = readHeader();
 
300
                
 
301
                //leo el start
 
302
                if(beat == null){
 
303
                        beat = this.factory.newBeat();
 
304
                        beat.setStart(measure.getStart());
 
305
                        measure.addBeat(beat);
 
306
                }else if(((header & COMPONENT_NEXT_BEAT) != 0)){
 
307
                        beat = this.factory.newBeat();
 
308
                        beat.setStart(previous.getStart() + previous.getDuration().getTime());
 
309
                        measure.addBeat(beat);
 
310
                }
 
311
                
 
312
                //leo la duracion
 
313
                if(((header & COMPONENT_NEXT_DURATION) != 0)){
 
314
                        readDuration(beat.getDuration());
 
315
                }else if(previous != null && !previous.equals(beat)){
 
316
                        previous.getDuration().copy( beat.getDuration() );
 
317
                }
 
318
                
 
319
                if(((header & COMPONENT_NOTE) != 0)){
 
320
                        TGNote note = this.factory.newNote();
 
321
                        
 
322
                        //leo el valor
 
323
                        note.setValue(readByte());
 
324
                        
 
325
                        //leo la cuerda
 
326
                        note.setString(readByte());
 
327
                        
 
328
                        //leo la ligadura
 
329
                        note.setTiedNote((header & COMPONENT_TIEDNOTE) != 0);
 
330
                        
 
331
                        //leo el velocity
 
332
                        if(((header & COMPONENT_VELOCITY) != 0)){
 
333
                                this.velocity = readByte();
 
334
                        }
 
335
                        note.setVelocity(this.velocity);
 
336
                        
 
337
                        //leo los efectos
 
338
                        if(((header & COMPONENT_EFFECT) != 0)){
 
339
                                readNoteEffect(note.getEffect());
 
340
                        }
 
341
                        beat.addNote(note);
 
342
                }
 
343
                return beat;
 
344
        }
 
345
        
 
346
        private TGString readInstrumentString(int number){
 
347
                TGString string = this.factory.newString();
 
348
                
 
349
                string.setNumber(number);
 
350
                
 
351
                //leo el valor
 
352
                string.setValue( readByte() );
 
353
                
 
354
                return string;
 
355
        }
 
356
        
 
357
        private void readTempo(TGTempo tempo){
 
358
                //leo el valor
 
359
                tempo.setValue(readShort());
 
360
        }
 
361
        
 
362
        private void readTimeSignature(TGTimeSignature timeSignature){
 
363
                //leo el numerador
 
364
                timeSignature.setNumerator(readByte());
 
365
                
 
366
                //leo el denominador
 
367
                readDuration(timeSignature.getDenominator());
 
368
        }
 
369
        
 
370
        private void readDuration(TGDuration duration){
 
371
                int header = readHeader();
 
372
                
 
373
                // leo el puntillo
 
374
                duration.setDotted((header & DURATION_DOTTED) != 0);
 
375
                
 
376
                //leo el doble puntillo
 
377
                duration.setDoubleDotted((header & DURATION_DOUBLE_DOTTED) != 0);
 
378
                
 
379
                //leo el valor
 
380
                duration.setValue(readByte());
 
381
                
 
382
                //leo el tupleto
 
383
                if(((header & DURATION_TUPLETO) != 0)){
 
384
                        readTupleto(duration.getTupleto());
 
385
                }
 
386
        }
 
387
        
 
388
        private void readTupleto(TGTupleto tupleto){
 
389
                //leo los enters
 
390
                tupleto.setEnters(readByte());
 
391
                
 
392
                //leo los tiempos
 
393
                tupleto.setTimes(readByte());
 
394
        }
 
395
        
 
396
        private void readNoteEffect(TGNoteEffect effect){
 
397
                int header = readHeader(3);
 
398
                
 
399
                //leo el bend
 
400
                if(((header & EFFECT_BEND) != 0)){
 
401
                        effect.setBend(readBendEffect());
 
402
                }
 
403
                
 
404
                //leo el tremolo bar
 
405
                if(((header & EFFECT_TREMOLO_BAR) != 0)){
 
406
                        effect.setTremoloBar(readTremoloBarEffect());
 
407
                }
 
408
                
 
409
                //leo el harmonic
 
410
                if(((header & EFFECT_HARMONIC) != 0)){
 
411
                        effect.setHarmonic(readHarmonicEffect());
 
412
                }
 
413
                
 
414
                //leo el grace
 
415
                if(((header & EFFECT_GRACE) != 0)){
 
416
                        effect.setGrace(readGraceEffect());
 
417
                }
 
418
                
 
419
                //leo el trill
 
420
                if(((header & EFFECT_TRILL) != 0)){
 
421
                        effect.setTrill(readTrillEffect());
 
422
                }
 
423
                
 
424
                //leo el tremolo picking
 
425
                if(((header & EFFECT_TREMOLO_PICKING) != 0)){
 
426
                        effect.setTremoloPicking(readTremoloPickingEffect());
 
427
                }
 
428
                
 
429
                //vibrato
 
430
                effect.setVibrato(((header & EFFECT_VIBRATO) != 0));
 
431
                
 
432
                //dead note
 
433
                effect.setDeadNote(((header & EFFECT_DEAD) != 0));
 
434
                
 
435
                //slide
 
436
                effect.setSlide(((header & EFFECT_SLIDE) != 0));
 
437
                
 
438
                //hammer-on/pull-off
 
439
                effect.setHammer(((header & EFFECT_HAMMER) != 0));
 
440
                
 
441
                //ghost note
 
442
                effect.setGhostNote(((header & EFFECT_GHOST) != 0));
 
443
                
 
444
                //accentuated note
 
445
                effect.setAccentuatedNote(((header & EFFECT_ACCENTUATED) != 0));
 
446
                
 
447
                //heavy accentuated note
 
448
                effect.setHeavyAccentuatedNote(((header & EFFECT_HEAVY_ACCENTUATED) != 0));
 
449
                
 
450
                //palm mute
 
451
                effect.setPalmMute(((header & EFFECT_PALM_MUTE) != 0));
 
452
                
 
453
                //staccato
 
454
                effect.setStaccato(((header & EFFECT_STACCATO) != 0));
 
455
                
 
456
                //tapping
 
457
                effect.setTapping(((header & EFFECT_TAPPING) != 0));
 
458
                
 
459
                //slapping
 
460
                effect.setSlapping(((header & EFFECT_SLAPPING) != 0));
 
461
                
 
462
                //popping
 
463
                effect.setPopping(((header & EFFECT_POPPING) != 0));
 
464
                
 
465
                //fade in
 
466
                effect.setFadeIn(((header & EFFECT_FADE_IN) != 0));
 
467
        }
 
468
        
 
469
        private TGEffectBend readBendEffect(){
 
470
                TGEffectBend bend = this.factory.newEffectBend();
 
471
                
 
472
                //leo la cantidad de puntos
 
473
                int count = readByte();
 
474
                
 
475
                for(int i = 0;i < count;i++){
 
476
                        //leo la posicion
 
477
                        int position = readByte();
 
478
                        
 
479
                        //leo el valor
 
480
                        int value = readByte();
 
481
                        
 
482
                        //agrego el punto
 
483
                        bend.addPoint(position,value);
 
484
                }
 
485
                return bend;
 
486
        }
 
487
        
 
488
        private TGEffectTremoloBar readTremoloBarEffect(){
 
489
                TGEffectTremoloBar tremoloBar = this.factory.newEffectTremoloBar();
 
490
                
 
491
                //leo la cantidad de puntos
 
492
                int count = readByte();
 
493
                
 
494
                for(int i = 0;i < count;i++){
 
495
                        //leo la posicion
 
496
                        int position = readByte();
 
497
                        
 
498
                        //leo el valor
 
499
                        int value =  (readByte() - TGEffectTremoloBar.MAX_VALUE_LENGTH);
 
500
                        
 
501
                        //agrego el punto
 
502
                        tremoloBar.addPoint(position,value);
 
503
                }
 
504
                return tremoloBar;
 
505
        }
 
506
        
 
507
        private TGEffectHarmonic readHarmonicEffect(){
 
508
                TGEffectHarmonic harmonic = this.factory.newEffectHarmonic();
 
509
                
 
510
                //leo el tipo
 
511
                harmonic.setType(readByte());
 
512
                
 
513
                //leo la data
 
514
                if(harmonic.getType() == TGEffectHarmonic.TYPE_ARTIFICIAL){
 
515
                        harmonic.setData(TGEffectHarmonic.MIN_ARTIFICIAL_OFFSET + readByte());
 
516
                }else if(harmonic.getType() == TGEffectHarmonic.TYPE_TAPPED){
 
517
                        harmonic.setData(readByte());
 
518
                }
 
519
                return harmonic;
 
520
        }
 
521
        
 
522
        private TGEffectGrace readGraceEffect(){
 
523
                TGEffectGrace grace = this.factory.newEffectGrace();
 
524
                
 
525
                int header = readHeader();
 
526
                
 
527
                grace.setDead(((header & GRACE_FLAG_DEAD) != 0));
 
528
                
 
529
                grace.setOnBeat(((header & GRACE_FLAG_ON_BEAT) != 0));
 
530
                
 
531
                //leo el fret
 
532
                grace.setFret(readByte());
 
533
                
 
534
                //leo la duracion
 
535
                grace.setDuration(readByte());
 
536
                
 
537
                //leo el velocity
 
538
                grace.setDynamic(readByte());
 
539
                
 
540
                //leo la transicion
 
541
                grace.setTransition(readByte());
 
542
                
 
543
                return grace;
 
544
        }
 
545
        
 
546
        private TGEffectTremoloPicking readTremoloPickingEffect(){
 
547
                TGEffectTremoloPicking tremoloPicking = this.factory.newEffectTremoloPicking();
 
548
                
 
549
                //leo la duracion
 
550
                tremoloPicking.getDuration().setValue(readByte());
 
551
                
 
552
                return tremoloPicking;
 
553
        }
 
554
        
 
555
        private TGEffectTrill readTrillEffect(){
 
556
                TGEffectTrill trill = this.factory.newEffectTrill();
 
557
                
 
558
                //leo el fret
 
559
                trill.setFret(readByte());
 
560
                
 
561
                //leo la duracion
 
562
                trill.getDuration().setValue(readByte());
 
563
                
 
564
                return trill;
 
565
        }
 
566
        
 
567
        private TGMarker readMarker(int measure){
 
568
                TGMarker marker = this.factory.newMarker();
 
569
                
 
570
                marker.setMeasure(measure);
 
571
                
 
572
                //leo el titulo
 
573
                marker.setTitle(readString());
 
574
                
 
575
                //leo el color
 
576
                readColor(marker.getColor());
 
577
                
 
578
                return marker;
 
579
        }
 
580
        
 
581
        private void readColor(TGColor color){
 
582
                //leo el RGB
 
583
                color.setR(readShort());
 
584
                color.setG(readShort());
 
585
                color.setB(readShort());
 
586
        }
 
587
        
 
588
        private void readLyrics(TGLyric lyrics){
 
589
                //leo el compas de comienzo
 
590
                lyrics.setFrom(readShort());
 
591
                
 
592
                //leo el texto
 
593
                lyrics.setLyrics(readString());
 
594
        }
 
595
        
 
596
        private int readByte(){
 
597
                try {
 
598
                        return this.dataInputStream.read();
 
599
                } catch (IOException e) {
 
600
                        e.printStackTrace();
 
601
                }
 
602
                return 0;
 
603
        }
 
604
        
 
605
        private int readHeader(){
 
606
                try {
 
607
                        return this.dataInputStream.read();
 
608
                } catch (IOException e) {
 
609
                        e.printStackTrace();
 
610
                }
 
611
                return 0;
 
612
        }
 
613
        
 
614
        private int readHeader(int bCount){
 
615
                int header = 0;
 
616
                for(int i = bCount; i > 0; i --){
 
617
                        header += ( readHeader() << ( (8 * i) - 8 ) );
 
618
                }
 
619
                return header;
 
620
        }
 
621
        
 
622
        private short readShort(){
 
623
                try {
 
624
                        return this.dataInputStream.readShort();
 
625
                } catch (IOException e) {
 
626
                        e.printStackTrace();
 
627
                }
 
628
                return 0;
 
629
        }
 
630
        
 
631
        private String readString(){
 
632
                try {
 
633
                        int length = this.dataInputStream.read();
 
634
                        char[] chars = new char[length];
 
635
                        for(int i = 0;i < chars.length; i++){
 
636
                                chars[i] = this.dataInputStream.readChar();
 
637
                        }
 
638
                        return String.copyValueOf(chars);
 
639
                } catch (IOException e) {
 
640
                        e.printStackTrace();
 
641
                }
 
642
                return null;
 
643
                
 
644
        }
 
645
}