forked from clojure/clojure
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathType.java
More file actions
895 lines (826 loc) · 28.6 KB
/
Type.java
File metadata and controls
895 lines (826 loc) · 28.6 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
/***
* ASM: a very small and fast Java bytecode manipulation framework
* Copyright (c) 2000-2011 INRIA, France Telecom
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
package clojure.asm;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
/**
* A Java field or method type. This class can be used to make it easier to
* manipulate type and method descriptors.
*
* @author Eric Bruneton
* @author Chris Nokleberg
*/
public class Type {
/**
* The sort of the <tt>void</tt> type. See {@link #getSort getSort}.
*/
public static final int VOID = 0;
/**
* The sort of the <tt>boolean</tt> type. See {@link #getSort getSort}.
*/
public static final int BOOLEAN = 1;
/**
* The sort of the <tt>char</tt> type. See {@link #getSort getSort}.
*/
public static final int CHAR = 2;
/**
* The sort of the <tt>byte</tt> type. See {@link #getSort getSort}.
*/
public static final int BYTE = 3;
/**
* The sort of the <tt>short</tt> type. See {@link #getSort getSort}.
*/
public static final int SHORT = 4;
/**
* The sort of the <tt>int</tt> type. See {@link #getSort getSort}.
*/
public static final int INT = 5;
/**
* The sort of the <tt>float</tt> type. See {@link #getSort getSort}.
*/
public static final int FLOAT = 6;
/**
* The sort of the <tt>long</tt> type. See {@link #getSort getSort}.
*/
public static final int LONG = 7;
/**
* The sort of the <tt>double</tt> type. See {@link #getSort getSort}.
*/
public static final int DOUBLE = 8;
/**
* The sort of array reference types. See {@link #getSort getSort}.
*/
public static final int ARRAY = 9;
/**
* The sort of object reference types. See {@link #getSort getSort}.
*/
public static final int OBJECT = 10;
/**
* The sort of method types. See {@link #getSort getSort}.
*/
public static final int METHOD = 11;
/**
* The <tt>void</tt> type.
*/
public static final Type VOID_TYPE = new Type(VOID, null, ('V' << 24)
| (5 << 16) | (0 << 8) | 0, 1);
/**
* The <tt>boolean</tt> type.
*/
public static final Type BOOLEAN_TYPE = new Type(BOOLEAN, null, ('Z' << 24)
| (0 << 16) | (5 << 8) | 1, 1);
/**
* The <tt>char</tt> type.
*/
public static final Type CHAR_TYPE = new Type(CHAR, null, ('C' << 24)
| (0 << 16) | (6 << 8) | 1, 1);
/**
* The <tt>byte</tt> type.
*/
public static final Type BYTE_TYPE = new Type(BYTE, null, ('B' << 24)
| (0 << 16) | (5 << 8) | 1, 1);
/**
* The <tt>short</tt> type.
*/
public static final Type SHORT_TYPE = new Type(SHORT, null, ('S' << 24)
| (0 << 16) | (7 << 8) | 1, 1);
/**
* The <tt>int</tt> type.
*/
public static final Type INT_TYPE = new Type(INT, null, ('I' << 24)
| (0 << 16) | (0 << 8) | 1, 1);
/**
* The <tt>float</tt> type.
*/
public static final Type FLOAT_TYPE = new Type(FLOAT, null, ('F' << 24)
| (2 << 16) | (2 << 8) | 1, 1);
/**
* The <tt>long</tt> type.
*/
public static final Type LONG_TYPE = new Type(LONG, null, ('J' << 24)
| (1 << 16) | (1 << 8) | 2, 1);
/**
* The <tt>double</tt> type.
*/
public static final Type DOUBLE_TYPE = new Type(DOUBLE, null, ('D' << 24)
| (3 << 16) | (3 << 8) | 2, 1);
// ------------------------------------------------------------------------
// Fields
// ------------------------------------------------------------------------
/**
* The sort of this Java type.
*/
private final int sort;
/**
* A buffer containing the internal name of this Java type. This field is
* only used for reference types.
*/
private final char[] buf;
/**
* The offset of the internal name of this Java type in {@link #buf buf} or,
* for primitive types, the size, descriptor and getOpcode offsets for this
* type (byte 0 contains the size, byte 1 the descriptor, byte 2 the offset
* for IALOAD or IASTORE, byte 3 the offset for all other instructions).
*/
private final int off;
/**
* The length of the internal name of this Java type.
*/
private final int len;
// ------------------------------------------------------------------------
// Constructors
// ------------------------------------------------------------------------
/**
* Constructs a reference type.
*
* @param sort
* the sort of the reference type to be constructed.
* @param buf
* a buffer containing the descriptor of the previous type.
* @param off
* the offset of this descriptor in the previous buffer.
* @param len
* the length of this descriptor.
*/
private Type(final int sort, final char[] buf, final int off, final int len) {
this.sort = sort;
this.buf = buf;
this.off = off;
this.len = len;
}
/**
* Returns the Java type corresponding to the given type descriptor.
*
* @param typeDescriptor
* a field or method type descriptor.
* @return the Java type corresponding to the given type descriptor.
*/
public static Type getType(final String typeDescriptor) {
return getType(typeDescriptor.toCharArray(), 0);
}
/**
* Returns the Java type corresponding to the given internal name.
*
* @param internalName
* an internal name.
* @return the Java type corresponding to the given internal name.
*/
public static Type getObjectType(final String internalName) {
char[] buf = internalName.toCharArray();
return new Type(buf[0] == '[' ? ARRAY : OBJECT, buf, 0, buf.length);
}
/**
* Returns the Java type corresponding to the given method descriptor.
* Equivalent to <code>Type.getType(methodDescriptor)</code>.
*
* @param methodDescriptor
* a method descriptor.
* @return the Java type corresponding to the given method descriptor.
*/
public static Type getMethodType(final String methodDescriptor) {
return getType(methodDescriptor.toCharArray(), 0);
}
/**
* Returns the Java method type corresponding to the given argument and
* return types.
*
* @param returnType
* the return type of the method.
* @param argumentTypes
* the argument types of the method.
* @return the Java type corresponding to the given argument and return
* types.
*/
public static Type getMethodType(final Type returnType,
final Type... argumentTypes) {
return getType(getMethodDescriptor(returnType, argumentTypes));
}
/**
* Returns the Java type corresponding to the given class.
*
* @param c
* a class.
* @return the Java type corresponding to the given class.
*/
public static Type getType(final Class<?> c) {
if (c.isPrimitive()) {
if (c == Integer.TYPE) {
return INT_TYPE;
} else if (c == Void.TYPE) {
return VOID_TYPE;
} else if (c == Boolean.TYPE) {
return BOOLEAN_TYPE;
} else if (c == Byte.TYPE) {
return BYTE_TYPE;
} else if (c == Character.TYPE) {
return CHAR_TYPE;
} else if (c == Short.TYPE) {
return SHORT_TYPE;
} else if (c == Double.TYPE) {
return DOUBLE_TYPE;
} else if (c == Float.TYPE) {
return FLOAT_TYPE;
} else /* if (c == Long.TYPE) */{
return LONG_TYPE;
}
} else {
return getType(getDescriptor(c));
}
}
/**
* Returns the Java method type corresponding to the given constructor.
*
* @param c
* a {@link Constructor Constructor} object.
* @return the Java method type corresponding to the given constructor.
*/
public static Type getType(final Constructor<?> c) {
return getType(getConstructorDescriptor(c));
}
/**
* Returns the Java method type corresponding to the given method.
*
* @param m
* a {@link Method Method} object.
* @return the Java method type corresponding to the given method.
*/
public static Type getType(final Method m) {
return getType(getMethodDescriptor(m));
}
/**
* Returns the Java types corresponding to the argument types of the given
* method descriptor.
*
* @param methodDescriptor
* a method descriptor.
* @return the Java types corresponding to the argument types of the given
* method descriptor.
*/
public static Type[] getArgumentTypes(final String methodDescriptor) {
char[] buf = methodDescriptor.toCharArray();
int off = 1;
int size = 0;
while (true) {
char car = buf[off++];
if (car == ')') {
break;
} else if (car == 'L') {
while (buf[off++] != ';') {
}
++size;
} else if (car != '[') {
++size;
}
}
Type[] args = new Type[size];
off = 1;
size = 0;
while (buf[off] != ')') {
args[size] = getType(buf, off);
off += args[size].len + (args[size].sort == OBJECT ? 2 : 0);
size += 1;
}
return args;
}
/**
* Returns the Java types corresponding to the argument types of the given
* method.
*
* @param method
* a method.
* @return the Java types corresponding to the argument types of the given
* method.
*/
public static Type[] getArgumentTypes(final Method method) {
Class<?>[] classes = method.getParameterTypes();
Type[] types = new Type[classes.length];
for (int i = classes.length - 1; i >= 0; --i) {
types[i] = getType(classes[i]);
}
return types;
}
/**
* Returns the Java type corresponding to the return type of the given
* method descriptor.
*
* @param methodDescriptor
* a method descriptor.
* @return the Java type corresponding to the return type of the given
* method descriptor.
*/
public static Type getReturnType(final String methodDescriptor) {
char[] buf = methodDescriptor.toCharArray();
return getType(buf, methodDescriptor.indexOf(')') + 1);
}
/**
* Returns the Java type corresponding to the return type of the given
* method.
*
* @param method
* a method.
* @return the Java type corresponding to the return type of the given
* method.
*/
public static Type getReturnType(final Method method) {
return getType(method.getReturnType());
}
/**
* Computes the size of the arguments and of the return value of a method.
*
* @param desc
* the descriptor of a method.
* @return the size of the arguments of the method (plus one for the
* implicit this argument), argSize, and the size of its return
* value, retSize, packed into a single int i =
* <tt>(argSize << 2) | retSize</tt> (argSize is therefore equal to
* <tt>i >> 2</tt>, and retSize to <tt>i & 0x03</tt>).
*/
public static int getArgumentsAndReturnSizes(final String desc) {
int n = 1;
int c = 1;
while (true) {
char car = desc.charAt(c++);
if (car == ')') {
car = desc.charAt(c);
return n << 2
| (car == 'V' ? 0 : (car == 'D' || car == 'J' ? 2 : 1));
} else if (car == 'L') {
while (desc.charAt(c++) != ';') {
}
n += 1;
} else if (car == '[') {
while ((car = desc.charAt(c)) == '[') {
++c;
}
if (car == 'D' || car == 'J') {
n -= 1;
}
} else if (car == 'D' || car == 'J') {
n += 2;
} else {
n += 1;
}
}
}
/**
* Returns the Java type corresponding to the given type descriptor. For
* method descriptors, buf is supposed to contain nothing more than the
* descriptor itself.
*
* @param buf
* a buffer containing a type descriptor.
* @param off
* the offset of this descriptor in the previous buffer.
* @return the Java type corresponding to the given type descriptor.
*/
private static Type getType(final char[] buf, final int off) {
int len;
switch (buf[off]) {
case 'V':
return VOID_TYPE;
case 'Z':
return BOOLEAN_TYPE;
case 'C':
return CHAR_TYPE;
case 'B':
return BYTE_TYPE;
case 'S':
return SHORT_TYPE;
case 'I':
return INT_TYPE;
case 'F':
return FLOAT_TYPE;
case 'J':
return LONG_TYPE;
case 'D':
return DOUBLE_TYPE;
case '[':
len = 1;
while (buf[off + len] == '[') {
++len;
}
if (buf[off + len] == 'L') {
++len;
while (buf[off + len] != ';') {
++len;
}
}
return new Type(ARRAY, buf, off, len + 1);
case 'L':
len = 1;
while (buf[off + len] != ';') {
++len;
}
return new Type(OBJECT, buf, off + 1, len - 1);
// case '(':
default:
return new Type(METHOD, buf, off, buf.length - off);
}
}
// ------------------------------------------------------------------------
// Accessors
// ------------------------------------------------------------------------
/**
* Returns the sort of this Java type.
*
* @return {@link #VOID VOID}, {@link #BOOLEAN BOOLEAN}, {@link #CHAR CHAR},
* {@link #BYTE BYTE}, {@link #SHORT SHORT}, {@link #INT INT},
* {@link #FLOAT FLOAT}, {@link #LONG LONG}, {@link #DOUBLE DOUBLE},
* {@link #ARRAY ARRAY}, {@link #OBJECT OBJECT} or {@link #METHOD
* METHOD}.
*/
public int getSort() {
return sort;
}
/**
* Returns the number of dimensions of this array type. This method should
* only be used for an array type.
*
* @return the number of dimensions of this array type.
*/
public int getDimensions() {
int i = 1;
while (buf[off + i] == '[') {
++i;
}
return i;
}
/**
* Returns the type of the elements of this array type. This method should
* only be used for an array type.
*
* @return Returns the type of the elements of this array type.
*/
public Type getElementType() {
return getType(buf, off + getDimensions());
}
/**
* Returns the binary name of the class corresponding to this type. This
* method must not be used on method types.
*
* @return the binary name of the class corresponding to this type.
*/
public String getClassName() {
switch (sort) {
case VOID:
return "void";
case BOOLEAN:
return "boolean";
case CHAR:
return "char";
case BYTE:
return "byte";
case SHORT:
return "short";
case INT:
return "int";
case FLOAT:
return "float";
case LONG:
return "long";
case DOUBLE:
return "double";
case ARRAY:
StringBuffer b = new StringBuffer(getElementType().getClassName());
for (int i = getDimensions(); i > 0; --i) {
b.append("[]");
}
return b.toString();
case OBJECT:
return new String(buf, off, len).replace('/', '.');
default:
return null;
}
}
/**
* Returns the internal name of the class corresponding to this object or
* array type. The internal name of a class is its fully qualified name (as
* returned by Class.getName(), where '.' are replaced by '/'. This method
* should only be used for an object or array type.
*
* @return the internal name of the class corresponding to this object type.
*/
public String getInternalName() {
return new String(buf, off, len);
}
/**
* Returns the argument types of methods of this type. This method should
* only be used for method types.
*
* @return the argument types of methods of this type.
*/
public Type[] getArgumentTypes() {
return getArgumentTypes(getDescriptor());
}
/**
* Returns the return type of methods of this type. This method should only
* be used for method types.
*
* @return the return type of methods of this type.
*/
public Type getReturnType() {
return getReturnType(getDescriptor());
}
/**
* Returns the size of the arguments and of the return value of methods of
* this type. This method should only be used for method types.
*
* @return the size of the arguments (plus one for the implicit this
* argument), argSize, and the size of the return value, retSize,
* packed into a single int i = <tt>(argSize << 2) | retSize</tt>
* (argSize is therefore equal to <tt>i >> 2</tt>, and retSize to
* <tt>i & 0x03</tt>).
*/
public int getArgumentsAndReturnSizes() {
return getArgumentsAndReturnSizes(getDescriptor());
}
// ------------------------------------------------------------------------
// Conversion to type descriptors
// ------------------------------------------------------------------------
/**
* Returns the descriptor corresponding to this Java type.
*
* @return the descriptor corresponding to this Java type.
*/
public String getDescriptor() {
StringBuffer buf = new StringBuffer();
getDescriptor(buf);
return buf.toString();
}
/**
* Returns the descriptor corresponding to the given argument and return
* types.
*
* @param returnType
* the return type of the method.
* @param argumentTypes
* the argument types of the method.
* @return the descriptor corresponding to the given argument and return
* types.
*/
public static String getMethodDescriptor(final Type returnType,
final Type... argumentTypes) {
StringBuffer buf = new StringBuffer();
buf.append('(');
for (int i = 0; i < argumentTypes.length; ++i) {
argumentTypes[i].getDescriptor(buf);
}
buf.append(')');
returnType.getDescriptor(buf);
return buf.toString();
}
/**
* Appends the descriptor corresponding to this Java type to the given
* string buffer.
*
* @param buf
* the string buffer to which the descriptor must be appended.
*/
private void getDescriptor(final StringBuffer buf) {
if (this.buf == null) {
// descriptor is in byte 3 of 'off' for primitive types (buf ==
// null)
buf.append((char) ((off & 0xFF000000) >>> 24));
} else if (sort == OBJECT) {
buf.append('L');
buf.append(this.buf, off, len);
buf.append(';');
} else { // sort == ARRAY || sort == METHOD
buf.append(this.buf, off, len);
}
}
// ------------------------------------------------------------------------
// Direct conversion from classes to type descriptors,
// without intermediate Type objects
// ------------------------------------------------------------------------
/**
* Returns the internal name of the given class. The internal name of a
* class is its fully qualified name, as returned by Class.getName(), where
* '.' are replaced by '/'.
*
* @param c
* an object or array class.
* @return the internal name of the given class.
*/
public static String getInternalName(final Class<?> c) {
return c.getName().replace('.', '/');
}
/**
* Returns the descriptor corresponding to the given Java type.
*
* @param c
* an object class, a primitive class or an array class.
* @return the descriptor corresponding to the given class.
*/
public static String getDescriptor(final Class<?> c) {
StringBuffer buf = new StringBuffer();
getDescriptor(buf, c);
return buf.toString();
}
/**
* Returns the descriptor corresponding to the given constructor.
*
* @param c
* a {@link Constructor Constructor} object.
* @return the descriptor of the given constructor.
*/
public static String getConstructorDescriptor(final Constructor<?> c) {
Class<?>[] parameters = c.getParameterTypes();
StringBuffer buf = new StringBuffer();
buf.append('(');
for (int i = 0; i < parameters.length; ++i) {
getDescriptor(buf, parameters[i]);
}
return buf.append(")V").toString();
}
/**
* Returns the descriptor corresponding to the given method.
*
* @param m
* a {@link Method Method} object.
* @return the descriptor of the given method.
*/
public static String getMethodDescriptor(final Method m) {
Class<?>[] parameters = m.getParameterTypes();
StringBuffer buf = new StringBuffer();
buf.append('(');
for (int i = 0; i < parameters.length; ++i) {
getDescriptor(buf, parameters[i]);
}
buf.append(')');
getDescriptor(buf, m.getReturnType());
return buf.toString();
}
/**
* Appends the descriptor of the given class to the given string buffer.
*
* @param buf
* the string buffer to which the descriptor must be appended.
* @param c
* the class whose descriptor must be computed.
*/
private static void getDescriptor(final StringBuffer buf, final Class<?> c) {
Class<?> d = c;
while (true) {
if (d.isPrimitive()) {
char car;
if (d == Integer.TYPE) {
car = 'I';
} else if (d == Void.TYPE) {
car = 'V';
} else if (d == Boolean.TYPE) {
car = 'Z';
} else if (d == Byte.TYPE) {
car = 'B';
} else if (d == Character.TYPE) {
car = 'C';
} else if (d == Short.TYPE) {
car = 'S';
} else if (d == Double.TYPE) {
car = 'D';
} else if (d == Float.TYPE) {
car = 'F';
} else /* if (d == Long.TYPE) */{
car = 'J';
}
buf.append(car);
return;
} else if (d.isArray()) {
buf.append('[');
d = d.getComponentType();
} else {
buf.append('L');
String name = d.getName();
int len = name.length();
for (int i = 0; i < len; ++i) {
char car = name.charAt(i);
buf.append(car == '.' ? '/' : car);
}
buf.append(';');
return;
}
}
}
// ------------------------------------------------------------------------
// Corresponding size and opcodes
// ------------------------------------------------------------------------
/**
* Returns the size of values of this type. This method must not be used for
* method types.
*
* @return the size of values of this type, i.e., 2 for <tt>long</tt> and
* <tt>double</tt>, 0 for <tt>void</tt> and 1 otherwise.
*/
public int getSize() {
// the size is in byte 0 of 'off' for primitive types (buf == null)
return buf == null ? (off & 0xFF) : 1;
}
/**
* Returns a JVM instruction opcode adapted to this Java type. This method
* must not be used for method types.
*
* @param opcode
* a JVM instruction opcode. This opcode must be one of ILOAD,
* ISTORE, IALOAD, IASTORE, IADD, ISUB, IMUL, IDIV, IREM, INEG,
* ISHL, ISHR, IUSHR, IAND, IOR, IXOR and IRETURN.
* @return an opcode that is similar to the given opcode, but adapted to
* this Java type. For example, if this type is <tt>float</tt> and
* <tt>opcode</tt> is IRETURN, this method returns FRETURN.
*/
public int getOpcode(final int opcode) {
if (opcode == Opcodes.IALOAD || opcode == Opcodes.IASTORE) {
// the offset for IALOAD or IASTORE is in byte 1 of 'off' for
// primitive types (buf == null)
return opcode + (buf == null ? (off & 0xFF00) >> 8 : 4);
} else {
// the offset for other instructions is in byte 2 of 'off' for
// primitive types (buf == null)
return opcode + (buf == null ? (off & 0xFF0000) >> 16 : 4);
}
}
// ------------------------------------------------------------------------
// Equals, hashCode and toString
// ------------------------------------------------------------------------
/**
* Tests if the given object is equal to this type.
*
* @param o
* the object to be compared to this type.
* @return <tt>true</tt> if the given object is equal to this type.
*/
@Override
public boolean equals(final Object o) {
if (this == o) {
return true;
}
if (!(o instanceof Type)) {
return false;
}
Type t = (Type) o;
if (sort != t.sort) {
return false;
}
if (sort >= ARRAY) {
if (len != t.len) {
return false;
}
for (int i = off, j = t.off, end = i + len; i < end; i++, j++) {
if (buf[i] != t.buf[j]) {
return false;
}
}
}
return true;
}
/**
* Returns a hash code value for this type.
*
* @return a hash code value for this type.
*/
@Override
public int hashCode() {
int hc = 13 * sort;
if (sort >= ARRAY) {
for (int i = off, end = i + len; i < end; i++) {
hc = 17 * (hc + buf[i]);
}
}
return hc;
}
/**
* Returns a string representation of this type.
*
* @return the descriptor of this type.
*/
@Override
public String toString() {
return getDescriptor();
}
}