Mercurial > lasercutter
comparison src/clojure/asm/ClassWriter.java @ 10:ef7dbbd6452c
added clojure source goodness
author | Robert McIntyre <rlm@mit.edu> |
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date | Sat, 21 Aug 2010 06:25:44 -0400 |
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1 /*** | |
2 * ASM: a very small and fast Java bytecode manipulation framework | |
3 * Copyright (c) 2000-2005 INRIA, France Telecom | |
4 * All rights reserved. | |
5 * | |
6 * Redistribution and use in source and binary forms, with or without | |
7 * modification, are permitted provided that the following conditions | |
8 * are met: | |
9 * 1. Redistributions of source code must retain the above copyright | |
10 * notice, this list of conditions and the following disclaimer. | |
11 * 2. Redistributions in binary form must reproduce the above copyright | |
12 * notice, this list of conditions and the following disclaimer in the | |
13 * documentation and/or other materials provided with the distribution. | |
14 * 3. Neither the name of the copyright holders nor the names of its | |
15 * contributors may be used to endorse or promote products derived from | |
16 * this software without specific prior written permission. | |
17 * | |
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | |
28 * THE POSSIBILITY OF SUCH DAMAGE. | |
29 */ | |
30 package clojure.asm; | |
31 | |
32 /** | |
33 * A {@link ClassVisitor} that generates classes in bytecode form. More | |
34 * precisely this visitor generates a byte array conforming to the Java class | |
35 * file format. It can be used alone, to generate a Java class "from scratch", | |
36 * or with one or more {@link ClassReader ClassReader} and adapter class visitor | |
37 * to generate a modified class from one or more existing Java classes. | |
38 * | |
39 * @author Eric Bruneton | |
40 */ | |
41 public class ClassWriter implements ClassVisitor{ | |
42 | |
43 /** | |
44 * Flag to automatically compute the maximum stack size and the maximum | |
45 * number of local variables of methods. If this flag is set, then the | |
46 * arguments of the {@link MethodVisitor#visitMaxs visitMaxs} method of the | |
47 * {@link MethodVisitor} returned by the {@link #visitMethod visitMethod} | |
48 * method will be ignored, and computed automatically from the signature and | |
49 * the bytecode of each method. | |
50 * | |
51 * @see #ClassWriter(int) | |
52 */ | |
53 public final static int COMPUTE_MAXS = 1; | |
54 | |
55 /** | |
56 * Flag to automatically compute the stack map frames of methods from | |
57 * scratch. If this flag is set, then the calls to the | |
58 * {@link MethodVisitor#visitFrame} method are ignored, and the stack map | |
59 * frames are recomputed from the methods bytecode. The arguments of the | |
60 * {@link MethodVisitor#visitMaxs visitMaxs} method are also ignored and | |
61 * recomputed from the bytecode. In other words, computeFrames implies | |
62 * computeMaxs. | |
63 * | |
64 * @see #ClassWriter(int) | |
65 */ | |
66 public final static int COMPUTE_FRAMES = 2; | |
67 | |
68 /** | |
69 * The type of instructions without any argument. | |
70 */ | |
71 final static int NOARG_INSN = 0; | |
72 | |
73 /** | |
74 * The type of instructions with an signed byte argument. | |
75 */ | |
76 final static int SBYTE_INSN = 1; | |
77 | |
78 /** | |
79 * The type of instructions with an signed short argument. | |
80 */ | |
81 final static int SHORT_INSN = 2; | |
82 | |
83 /** | |
84 * The type of instructions with a local variable index argument. | |
85 */ | |
86 final static int VAR_INSN = 3; | |
87 | |
88 /** | |
89 * The type of instructions with an implicit local variable index argument. | |
90 */ | |
91 final static int IMPLVAR_INSN = 4; | |
92 | |
93 /** | |
94 * The type of instructions with a type descriptor argument. | |
95 */ | |
96 final static int TYPE_INSN = 5; | |
97 | |
98 /** | |
99 * The type of field and method invocations instructions. | |
100 */ | |
101 final static int FIELDORMETH_INSN = 6; | |
102 | |
103 /** | |
104 * The type of the INVOKEINTERFACE instruction. | |
105 */ | |
106 final static int ITFMETH_INSN = 7; | |
107 | |
108 /** | |
109 * The type of instructions with a 2 bytes bytecode offset label. | |
110 */ | |
111 final static int LABEL_INSN = 8; | |
112 | |
113 /** | |
114 * The type of instructions with a 4 bytes bytecode offset label. | |
115 */ | |
116 final static int LABELW_INSN = 9; | |
117 | |
118 /** | |
119 * The type of the LDC instruction. | |
120 */ | |
121 final static int LDC_INSN = 10; | |
122 | |
123 /** | |
124 * The type of the LDC_W and LDC2_W instructions. | |
125 */ | |
126 final static int LDCW_INSN = 11; | |
127 | |
128 /** | |
129 * The type of the IINC instruction. | |
130 */ | |
131 final static int IINC_INSN = 12; | |
132 | |
133 /** | |
134 * The type of the TABLESWITCH instruction. | |
135 */ | |
136 final static int TABL_INSN = 13; | |
137 | |
138 /** | |
139 * The type of the LOOKUPSWITCH instruction. | |
140 */ | |
141 final static int LOOK_INSN = 14; | |
142 | |
143 /** | |
144 * The type of the MULTIANEWARRAY instruction. | |
145 */ | |
146 final static int MANA_INSN = 15; | |
147 | |
148 /** | |
149 * The type of the WIDE instruction. | |
150 */ | |
151 final static int WIDE_INSN = 16; | |
152 | |
153 /** | |
154 * The instruction types of all JVM opcodes. | |
155 */ | |
156 static byte[] TYPE; | |
157 | |
158 /** | |
159 * The type of CONSTANT_Class constant pool items. | |
160 */ | |
161 final static int CLASS = 7; | |
162 | |
163 /** | |
164 * The type of CONSTANT_Fieldref constant pool items. | |
165 */ | |
166 final static int FIELD = 9; | |
167 | |
168 /** | |
169 * The type of CONSTANT_Methodref constant pool items. | |
170 */ | |
171 final static int METH = 10; | |
172 | |
173 /** | |
174 * The type of CONSTANT_InterfaceMethodref constant pool items. | |
175 */ | |
176 final static int IMETH = 11; | |
177 | |
178 /** | |
179 * The type of CONSTANT_String constant pool items. | |
180 */ | |
181 final static int STR = 8; | |
182 | |
183 /** | |
184 * The type of CONSTANT_Integer constant pool items. | |
185 */ | |
186 final static int INT = 3; | |
187 | |
188 /** | |
189 * The type of CONSTANT_Float constant pool items. | |
190 */ | |
191 final static int FLOAT = 4; | |
192 | |
193 /** | |
194 * The type of CONSTANT_Long constant pool items. | |
195 */ | |
196 final static int LONG = 5; | |
197 | |
198 /** | |
199 * The type of CONSTANT_Double constant pool items. | |
200 */ | |
201 final static int DOUBLE = 6; | |
202 | |
203 /** | |
204 * The type of CONSTANT_NameAndType constant pool items. | |
205 */ | |
206 final static int NAME_TYPE = 12; | |
207 | |
208 /** | |
209 * The type of CONSTANT_Utf8 constant pool items. | |
210 */ | |
211 final static int UTF8 = 1; | |
212 | |
213 /** | |
214 * Normal type Item stored in the ClassWriter {@link ClassWriter#typeTable}, | |
215 * instead of the constant pool, in order to avoid clashes with normal | |
216 * constant pool items in the ClassWriter constant pool's hash table. | |
217 */ | |
218 final static int TYPE_NORMAL = 13; | |
219 | |
220 /** | |
221 * Uninitialized type Item stored in the ClassWriter | |
222 * {@link ClassWriter#typeTable}, instead of the constant pool, in order to | |
223 * avoid clashes with normal constant pool items in the ClassWriter constant | |
224 * pool's hash table. | |
225 */ | |
226 final static int TYPE_UNINIT = 14; | |
227 | |
228 /** | |
229 * Merged type Item stored in the ClassWriter {@link ClassWriter#typeTable}, | |
230 * instead of the constant pool, in order to avoid clashes with normal | |
231 * constant pool items in the ClassWriter constant pool's hash table. | |
232 */ | |
233 final static int TYPE_MERGED = 15; | |
234 | |
235 /** | |
236 * The class reader from which this class writer was constructed, if any. | |
237 */ | |
238 ClassReader cr; | |
239 | |
240 /** | |
241 * Minor and major version numbers of the class to be generated. | |
242 */ | |
243 int version; | |
244 | |
245 /** | |
246 * Index of the next item to be added in the constant pool. | |
247 */ | |
248 int index; | |
249 | |
250 /** | |
251 * The constant pool of this class. | |
252 */ | |
253 ByteVector pool; | |
254 | |
255 /** | |
256 * The constant pool's hash table data. | |
257 */ | |
258 Item[] items; | |
259 | |
260 /** | |
261 * The threshold of the constant pool's hash table. | |
262 */ | |
263 int threshold; | |
264 | |
265 /** | |
266 * A reusable key used to look for items in the {@link #items} hash table. | |
267 */ | |
268 Item key; | |
269 | |
270 /** | |
271 * A reusable key used to look for items in the {@link #items} hash table. | |
272 */ | |
273 Item key2; | |
274 | |
275 /** | |
276 * A reusable key used to look for items in the {@link #items} hash table. | |
277 */ | |
278 Item key3; | |
279 | |
280 /** | |
281 * A type table used to temporarily store internal names that will not | |
282 * necessarily be stored in the constant pool. This type table is used by | |
283 * the control flow and data flow analysis algorithm used to compute stack | |
284 * map frames from scratch. This array associates to each index <tt>i</tt> | |
285 * the Item whose index is <tt>i</tt>. All Item objects stored in this | |
286 * array are also stored in the {@link #items} hash table. These two arrays | |
287 * allow to retrieve an Item from its index or, conversly, to get the index | |
288 * of an Item from its value. Each Item stores an internal name in its | |
289 * {@link Item#strVal1} field. | |
290 */ | |
291 Item[] typeTable; | |
292 | |
293 /** | |
294 * Number of elements in the {@link #typeTable} array. | |
295 */ | |
296 private short typeCount; // TODO int? | |
297 | |
298 /** | |
299 * The access flags of this class. | |
300 */ | |
301 private int access; | |
302 | |
303 /** | |
304 * The constant pool item that contains the internal name of this class. | |
305 */ | |
306 private int name; | |
307 | |
308 /** | |
309 * The internal name of this class. | |
310 */ | |
311 String thisName; | |
312 | |
313 /** | |
314 * The constant pool item that contains the signature of this class. | |
315 */ | |
316 private int signature; | |
317 | |
318 /** | |
319 * The constant pool item that contains the internal name of the super class | |
320 * of this class. | |
321 */ | |
322 private int superName; | |
323 | |
324 /** | |
325 * Number of interfaces implemented or extended by this class or interface. | |
326 */ | |
327 private int interfaceCount; | |
328 | |
329 /** | |
330 * The interfaces implemented or extended by this class or interface. More | |
331 * precisely, this array contains the indexes of the constant pool items | |
332 * that contain the internal names of these interfaces. | |
333 */ | |
334 private int[] interfaces; | |
335 | |
336 /** | |
337 * The index of the constant pool item that contains the name of the source | |
338 * file from which this class was compiled. | |
339 */ | |
340 private int sourceFile; | |
341 | |
342 /** | |
343 * The SourceDebug attribute of this class. | |
344 */ | |
345 private ByteVector sourceDebug; | |
346 | |
347 /** | |
348 * The constant pool item that contains the name of the enclosing class of | |
349 * this class. | |
350 */ | |
351 private int enclosingMethodOwner; | |
352 | |
353 /** | |
354 * The constant pool item that contains the name and descriptor of the | |
355 * enclosing method of this class. | |
356 */ | |
357 private int enclosingMethod; | |
358 | |
359 /** | |
360 * The runtime visible annotations of this class. | |
361 */ | |
362 private AnnotationWriter anns; | |
363 | |
364 /** | |
365 * The runtime invisible annotations of this class. | |
366 */ | |
367 private AnnotationWriter ianns; | |
368 | |
369 /** | |
370 * The non standard attributes of this class. | |
371 */ | |
372 private Attribute attrs; | |
373 | |
374 /** | |
375 * The number of entries in the InnerClasses attribute. | |
376 */ | |
377 private int innerClassesCount; | |
378 | |
379 /** | |
380 * The InnerClasses attribute. | |
381 */ | |
382 private ByteVector innerClasses; | |
383 | |
384 /** | |
385 * The fields of this class. These fields are stored in a linked list of | |
386 * {@link FieldWriter} objects, linked to each other by their | |
387 * {@link FieldWriter#next} field. This field stores the first element of | |
388 * this list. | |
389 */ | |
390 FieldWriter firstField; | |
391 | |
392 /** | |
393 * The fields of this class. These fields are stored in a linked list of | |
394 * {@link FieldWriter} objects, linked to each other by their | |
395 * {@link FieldWriter#next} field. This field stores the last element of | |
396 * this list. | |
397 */ | |
398 FieldWriter lastField; | |
399 | |
400 /** | |
401 * The methods of this class. These methods are stored in a linked list of | |
402 * {@link MethodWriter} objects, linked to each other by their | |
403 * {@link MethodWriter#next} field. This field stores the first element of | |
404 * this list. | |
405 */ | |
406 MethodWriter firstMethod; | |
407 | |
408 /** | |
409 * The methods of this class. These methods are stored in a linked list of | |
410 * {@link MethodWriter} objects, linked to each other by their | |
411 * {@link MethodWriter#next} field. This field stores the last element of | |
412 * this list. | |
413 */ | |
414 MethodWriter lastMethod; | |
415 | |
416 /** | |
417 * <tt>true</tt> if the maximum stack size and number of local variables | |
418 * must be automatically computed. | |
419 */ | |
420 private boolean computeMaxs; | |
421 | |
422 /** | |
423 * <tt>true</tt> if the stack map frames must be recomputed from scratch. | |
424 */ | |
425 private boolean computeFrames; | |
426 | |
427 /** | |
428 * <tt>true</tt> if the stack map tables of this class are invalid. The | |
429 * {@link MethodWriter#resizeInstructions} method cannot transform existing | |
430 * stack map tables, and so produces potentially invalid classes when it is | |
431 * executed. In this case the class is reread and rewritten with the | |
432 * {@link #COMPUTE_FRAMES} option (the resizeInstructions method can resize | |
433 * stack map tables when this option is used). | |
434 */ | |
435 boolean invalidFrames; | |
436 | |
437 // ------------------------------------------------------------------------ | |
438 // Static initializer | |
439 // ------------------------------------------------------------------------ | |
440 | |
441 /** | |
442 * Computes the instruction types of JVM opcodes. | |
443 */ | |
444 static | |
445 { | |
446 int i; | |
447 byte[] b = new byte[220]; | |
448 String s = "AAAAAAAAAAAAAAAABCKLLDDDDDEEEEEEEEEEEEEEEEEEEEAAAAAAAADD" | |
449 + "DDDEEEEEEEEEEEEEEEEEEEEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" | |
450 + "AAAAAAAAAAAAAAAAAMAAAAAAAAAAAAAAAAAAAAIIIIIIIIIIIIIIIIDNOAA" | |
451 + "AAAAGGGGGGGHAFBFAAFFAAQPIIJJIIIIIIIIIIIIIIIIII"; | |
452 for(i = 0; i < b.length; ++i) | |
453 { | |
454 b[i] = (byte) (s.charAt(i) - 'A'); | |
455 } | |
456 TYPE = b; | |
457 | |
458 // code to generate the above string | |
459 // | |
460 // // SBYTE_INSN instructions | |
461 // b[Constants.NEWARRAY] = SBYTE_INSN; | |
462 // b[Constants.BIPUSH] = SBYTE_INSN; | |
463 // | |
464 // // SHORT_INSN instructions | |
465 // b[Constants.SIPUSH] = SHORT_INSN; | |
466 // | |
467 // // (IMPL)VAR_INSN instructions | |
468 // b[Constants.RET] = VAR_INSN; | |
469 // for (i = Constants.ILOAD; i <= Constants.ALOAD; ++i) { | |
470 // b[i] = VAR_INSN; | |
471 // } | |
472 // for (i = Constants.ISTORE; i <= Constants.ASTORE; ++i) { | |
473 // b[i] = VAR_INSN; | |
474 // } | |
475 // for (i = 26; i <= 45; ++i) { // ILOAD_0 to ALOAD_3 | |
476 // b[i] = IMPLVAR_INSN; | |
477 // } | |
478 // for (i = 59; i <= 78; ++i) { // ISTORE_0 to ASTORE_3 | |
479 // b[i] = IMPLVAR_INSN; | |
480 // } | |
481 // | |
482 // // TYPE_INSN instructions | |
483 // b[Constants.NEW] = TYPE_INSN; | |
484 // b[Constants.ANEWARRAY] = TYPE_INSN; | |
485 // b[Constants.CHECKCAST] = TYPE_INSN; | |
486 // b[Constants.INSTANCEOF] = TYPE_INSN; | |
487 // | |
488 // // (Set)FIELDORMETH_INSN instructions | |
489 // for (i = Constants.GETSTATIC; i <= Constants.INVOKESTATIC; ++i) { | |
490 // b[i] = FIELDORMETH_INSN; | |
491 // } | |
492 // b[Constants.INVOKEINTERFACE] = ITFMETH_INSN; | |
493 // | |
494 // // LABEL(W)_INSN instructions | |
495 // for (i = Constants.IFEQ; i <= Constants.JSR; ++i) { | |
496 // b[i] = LABEL_INSN; | |
497 // } | |
498 // b[Constants.IFNULL] = LABEL_INSN; | |
499 // b[Constants.IFNONNULL] = LABEL_INSN; | |
500 // b[200] = LABELW_INSN; // GOTO_W | |
501 // b[201] = LABELW_INSN; // JSR_W | |
502 // // temporary opcodes used internally by ASM - see Label and | |
503 // MethodWriter | |
504 // for (i = 202; i < 220; ++i) { | |
505 // b[i] = LABEL_INSN; | |
506 // } | |
507 // | |
508 // // LDC(_W) instructions | |
509 // b[Constants.LDC] = LDC_INSN; | |
510 // b[19] = LDCW_INSN; // LDC_W | |
511 // b[20] = LDCW_INSN; // LDC2_W | |
512 // | |
513 // // special instructions | |
514 // b[Constants.IINC] = IINC_INSN; | |
515 // b[Constants.TABLESWITCH] = TABL_INSN; | |
516 // b[Constants.LOOKUPSWITCH] = LOOK_INSN; | |
517 // b[Constants.MULTIANEWARRAY] = MANA_INSN; | |
518 // b[196] = WIDE_INSN; // WIDE | |
519 // | |
520 // for (i = 0; i < b.length; ++i) { | |
521 // System.err.print((char)('A' + b[i])); | |
522 // } | |
523 // System.err.println(); | |
524 } | |
525 | |
526 // ------------------------------------------------------------------------ | |
527 // Constructor | |
528 // ------------------------------------------------------------------------ | |
529 | |
530 /** | |
531 * Constructs a new {@link ClassWriter} object. | |
532 * | |
533 * @param flags option flags that can be used to modify the default behavior | |
534 * of this class. See {@link #COMPUTE_MAXS}, {@link #COMPUTE_FRAMES}. | |
535 */ | |
536 public ClassWriter(final int flags){ | |
537 index = 1; | |
538 pool = new ByteVector(); | |
539 items = new Item[256]; | |
540 threshold = (int) (0.75d * items.length); | |
541 key = new Item(); | |
542 key2 = new Item(); | |
543 key3 = new Item(); | |
544 this.computeMaxs = (flags & COMPUTE_MAXS) != 0; | |
545 this.computeFrames = (flags & COMPUTE_FRAMES) != 0; | |
546 } | |
547 | |
548 /** | |
549 * Constructs a new {@link ClassWriter} object and enables optimizations for | |
550 * "mostly add" bytecode transformations. These optimizations are the | |
551 * following: | |
552 * <p/> | |
553 * <ul> <li>The constant pool from the original class is copied as is in | |
554 * the new class, which saves time. New constant pool entries will be added | |
555 * at the end if necessary, but unused constant pool entries <i>won't be | |
556 * removed</i>.</li> <li>Methods that are not transformed are copied as | |
557 * is in the new class, directly from the original class bytecode (i.e. | |
558 * without emitting visit events for all the method instructions), which | |
559 * saves a <i>lot</i> of time. Untransformed methods are detected by the | |
560 * fact that the {@link ClassReader} receives {@link MethodVisitor} objects | |
561 * that come from a {@link ClassWriter} (and not from a custom | |
562 * {@link ClassAdapter} or any other {@link ClassVisitor} instance).</li> | |
563 * </ul> | |
564 * | |
565 * @param classReader the {@link ClassReader} used to read the original | |
566 * class. It will be used to copy the entire constant pool from the | |
567 * original class and also to copy other fragments of original | |
568 * bytecode where applicable. | |
569 * @param flags option flags that can be used to modify the default behavior | |
570 * of this class. See {@link #COMPUTE_MAXS}, {@link #COMPUTE_FRAMES}. | |
571 */ | |
572 public ClassWriter(final ClassReader classReader, final int flags){ | |
573 this(flags); | |
574 classReader.copyPool(this); | |
575 this.cr = classReader; | |
576 } | |
577 | |
578 // ------------------------------------------------------------------------ | |
579 // Implementation of the ClassVisitor interface | |
580 // ------------------------------------------------------------------------ | |
581 | |
582 public void visit( | |
583 final int version, | |
584 final int access, | |
585 final String name, | |
586 final String signature, | |
587 final String superName, | |
588 final String[] interfaces){ | |
589 this.version = version; | |
590 this.access = access; | |
591 this.name = newClass(name); | |
592 thisName = name; | |
593 if(signature != null) | |
594 { | |
595 this.signature = newUTF8(signature); | |
596 } | |
597 this.superName = superName == null ? 0 : newClass(superName); | |
598 if(interfaces != null && interfaces.length > 0) | |
599 { | |
600 interfaceCount = interfaces.length; | |
601 this.interfaces = new int[interfaceCount]; | |
602 for(int i = 0; i < interfaceCount; ++i) | |
603 { | |
604 this.interfaces[i] = newClass(interfaces[i]); | |
605 } | |
606 } | |
607 } | |
608 | |
609 public void visitSource(final String file, final String debug){ | |
610 if(file != null) | |
611 { | |
612 sourceFile = newUTF8(file); | |
613 } | |
614 if(debug != null) | |
615 { | |
616 sourceDebug = new ByteVector().putUTF8(debug); | |
617 } | |
618 } | |
619 | |
620 public void visitOuterClass( | |
621 final String owner, | |
622 final String name, | |
623 final String desc){ | |
624 enclosingMethodOwner = newClass(owner); | |
625 if(name != null && desc != null) | |
626 { | |
627 enclosingMethod = newNameType(name, desc); | |
628 } | |
629 } | |
630 | |
631 public AnnotationVisitor visitAnnotation( | |
632 final String desc, | |
633 final boolean visible){ | |
634 ByteVector bv = new ByteVector(); | |
635 // write type, and reserve space for values count | |
636 bv.putShort(newUTF8(desc)).putShort(0); | |
637 AnnotationWriter aw = new AnnotationWriter(this, true, bv, bv, 2); | |
638 if(visible) | |
639 { | |
640 aw.next = anns; | |
641 anns = aw; | |
642 } | |
643 else | |
644 { | |
645 aw.next = ianns; | |
646 ianns = aw; | |
647 } | |
648 return aw; | |
649 } | |
650 | |
651 public void visitAttribute(final Attribute attr){ | |
652 attr.next = attrs; | |
653 attrs = attr; | |
654 } | |
655 | |
656 public void visitInnerClass( | |
657 final String name, | |
658 final String outerName, | |
659 final String innerName, | |
660 final int access){ | |
661 if(innerClasses == null) | |
662 { | |
663 innerClasses = new ByteVector(); | |
664 } | |
665 ++innerClassesCount; | |
666 innerClasses.putShort(name == null ? 0 : newClass(name)); | |
667 innerClasses.putShort(outerName == null ? 0 : newClass(outerName)); | |
668 innerClasses.putShort(innerName == null ? 0 : newUTF8(innerName)); | |
669 innerClasses.putShort(access); | |
670 } | |
671 | |
672 public FieldVisitor visitField( | |
673 final int access, | |
674 final String name, | |
675 final String desc, | |
676 final String signature, | |
677 final Object value){ | |
678 return new FieldWriter(this, access, name, desc, signature, value); | |
679 } | |
680 | |
681 public MethodVisitor visitMethod( | |
682 final int access, | |
683 final String name, | |
684 final String desc, | |
685 final String signature, | |
686 final String[] exceptions){ | |
687 return new MethodWriter(this, | |
688 access, | |
689 name, | |
690 desc, | |
691 signature, | |
692 exceptions, | |
693 computeMaxs, | |
694 computeFrames); | |
695 } | |
696 | |
697 public void visitEnd(){ | |
698 } | |
699 | |
700 // ------------------------------------------------------------------------ | |
701 // Other public methods | |
702 // ------------------------------------------------------------------------ | |
703 | |
704 /** | |
705 * Returns the bytecode of the class that was build with this class writer. | |
706 * | |
707 * @return the bytecode of the class that was build with this class writer. | |
708 */ | |
709 public byte[] toByteArray(){ | |
710 // computes the real size of the bytecode of this class | |
711 int size = 24 + 2 * interfaceCount; | |
712 int nbFields = 0; | |
713 FieldWriter fb = firstField; | |
714 while(fb != null) | |
715 { | |
716 ++nbFields; | |
717 size += fb.getSize(); | |
718 fb = fb.next; | |
719 } | |
720 int nbMethods = 0; | |
721 MethodWriter mb = firstMethod; | |
722 while(mb != null) | |
723 { | |
724 ++nbMethods; | |
725 size += mb.getSize(); | |
726 mb = mb.next; | |
727 } | |
728 int attributeCount = 0; | |
729 if(signature != 0) | |
730 { | |
731 ++attributeCount; | |
732 size += 8; | |
733 newUTF8("Signature"); | |
734 } | |
735 if(sourceFile != 0) | |
736 { | |
737 ++attributeCount; | |
738 size += 8; | |
739 newUTF8("SourceFile"); | |
740 } | |
741 if(sourceDebug != null) | |
742 { | |
743 ++attributeCount; | |
744 size += sourceDebug.length + 4; | |
745 newUTF8("SourceDebugExtension"); | |
746 } | |
747 if(enclosingMethodOwner != 0) | |
748 { | |
749 ++attributeCount; | |
750 size += 10; | |
751 newUTF8("EnclosingMethod"); | |
752 } | |
753 if((access & Opcodes.ACC_DEPRECATED) != 0) | |
754 { | |
755 ++attributeCount; | |
756 size += 6; | |
757 newUTF8("Deprecated"); | |
758 } | |
759 if((access & Opcodes.ACC_SYNTHETIC) != 0 | |
760 && (version & 0xffff) < Opcodes.V1_5) | |
761 { | |
762 ++attributeCount; | |
763 size += 6; | |
764 newUTF8("Synthetic"); | |
765 } | |
766 if(innerClasses != null) | |
767 { | |
768 ++attributeCount; | |
769 size += 8 + innerClasses.length; | |
770 newUTF8("InnerClasses"); | |
771 } | |
772 if(anns != null) | |
773 { | |
774 ++attributeCount; | |
775 size += 8 + anns.getSize(); | |
776 newUTF8("RuntimeVisibleAnnotations"); | |
777 } | |
778 if(ianns != null) | |
779 { | |
780 ++attributeCount; | |
781 size += 8 + ianns.getSize(); | |
782 newUTF8("RuntimeInvisibleAnnotations"); | |
783 } | |
784 if(attrs != null) | |
785 { | |
786 attributeCount += attrs.getCount(); | |
787 size += attrs.getSize(this, null, 0, -1, -1); | |
788 } | |
789 size += pool.length; | |
790 // allocates a byte vector of this size, in order to avoid unnecessary | |
791 // arraycopy operations in the ByteVector.enlarge() method | |
792 ByteVector out = new ByteVector(size); | |
793 out.putInt(0xCAFEBABE).putInt(version); | |
794 out.putShort(index).putByteArray(pool.data, 0, pool.length); | |
795 out.putShort(access).putShort(name).putShort(superName); | |
796 out.putShort(interfaceCount); | |
797 for(int i = 0; i < interfaceCount; ++i) | |
798 { | |
799 out.putShort(interfaces[i]); | |
800 } | |
801 out.putShort(nbFields); | |
802 fb = firstField; | |
803 while(fb != null) | |
804 { | |
805 fb.put(out); | |
806 fb = fb.next; | |
807 } | |
808 out.putShort(nbMethods); | |
809 mb = firstMethod; | |
810 while(mb != null) | |
811 { | |
812 mb.put(out); | |
813 mb = mb.next; | |
814 } | |
815 out.putShort(attributeCount); | |
816 if(signature != 0) | |
817 { | |
818 out.putShort(newUTF8("Signature")).putInt(2).putShort(signature); | |
819 } | |
820 if(sourceFile != 0) | |
821 { | |
822 out.putShort(newUTF8("SourceFile")).putInt(2).putShort(sourceFile); | |
823 } | |
824 if(sourceDebug != null) | |
825 { | |
826 int len = sourceDebug.length - 2; | |
827 out.putShort(newUTF8("SourceDebugExtension")).putInt(len); | |
828 out.putByteArray(sourceDebug.data, 2, len); | |
829 } | |
830 if(enclosingMethodOwner != 0) | |
831 { | |
832 out.putShort(newUTF8("EnclosingMethod")).putInt(4); | |
833 out.putShort(enclosingMethodOwner).putShort(enclosingMethod); | |
834 } | |
835 if((access & Opcodes.ACC_DEPRECATED) != 0) | |
836 { | |
837 out.putShort(newUTF8("Deprecated")).putInt(0); | |
838 } | |
839 if((access & Opcodes.ACC_SYNTHETIC) != 0 | |
840 && (version & 0xffff) < Opcodes.V1_5) | |
841 { | |
842 out.putShort(newUTF8("Synthetic")).putInt(0); | |
843 } | |
844 if(innerClasses != null) | |
845 { | |
846 out.putShort(newUTF8("InnerClasses")); | |
847 out.putInt(innerClasses.length + 2).putShort(innerClassesCount); | |
848 out.putByteArray(innerClasses.data, 0, innerClasses.length); | |
849 } | |
850 if(anns != null) | |
851 { | |
852 out.putShort(newUTF8("RuntimeVisibleAnnotations")); | |
853 anns.put(out); | |
854 } | |
855 if(ianns != null) | |
856 { | |
857 out.putShort(newUTF8("RuntimeInvisibleAnnotations")); | |
858 ianns.put(out); | |
859 } | |
860 if(attrs != null) | |
861 { | |
862 attrs.put(this, null, 0, -1, -1, out); | |
863 } | |
864 if(invalidFrames) | |
865 { | |
866 ClassWriter cw = new ClassWriter(COMPUTE_FRAMES); | |
867 new ClassReader(out.data).accept(cw, ClassReader.SKIP_FRAMES); | |
868 return cw.toByteArray(); | |
869 } | |
870 return out.data; | |
871 } | |
872 | |
873 // ------------------------------------------------------------------------ | |
874 // Utility methods: constant pool management | |
875 // ------------------------------------------------------------------------ | |
876 | |
877 /** | |
878 * Adds a number or string constant to the constant pool of the class being | |
879 * build. Does nothing if the constant pool already contains a similar item. | |
880 * | |
881 * @param cst the value of the constant to be added to the constant pool. | |
882 * This parameter must be an {@link Integer}, a {@link Float}, a | |
883 * {@link Long}, a {@link Double}, a {@link String} or a | |
884 * {@link Type}. | |
885 * @return a new or already existing constant item with the given value. | |
886 */ | |
887 Item newConstItem(final Object cst){ | |
888 if(cst instanceof Integer) | |
889 { | |
890 int val = ((Integer) cst).intValue(); | |
891 return newInteger(val); | |
892 } | |
893 else if(cst instanceof Byte) | |
894 { | |
895 int val = ((Byte) cst).intValue(); | |
896 return newInteger(val); | |
897 } | |
898 else if(cst instanceof Character) | |
899 { | |
900 int val = ((Character) cst).charValue(); | |
901 return newInteger(val); | |
902 } | |
903 else if(cst instanceof Short) | |
904 { | |
905 int val = ((Short) cst).intValue(); | |
906 return newInteger(val); | |
907 } | |
908 else if(cst instanceof Boolean) | |
909 { | |
910 int val = ((Boolean) cst).booleanValue() ? 1 : 0; | |
911 return newInteger(val); | |
912 } | |
913 else if(cst instanceof Float) | |
914 { | |
915 float val = ((Float) cst).floatValue(); | |
916 return newFloat(val); | |
917 } | |
918 else if(cst instanceof Long) | |
919 { | |
920 long val = ((Long) cst).longValue(); | |
921 return newLong(val); | |
922 } | |
923 else if(cst instanceof Double) | |
924 { | |
925 double val = ((Double) cst).doubleValue(); | |
926 return newDouble(val); | |
927 } | |
928 else if(cst instanceof String) | |
929 { | |
930 return newString((String) cst); | |
931 } | |
932 else if(cst instanceof Type) | |
933 { | |
934 Type t = (Type) cst; | |
935 return newClassItem(t.getSort() == Type.OBJECT | |
936 ? t.getInternalName() | |
937 : t.getDescriptor()); | |
938 } | |
939 else | |
940 { | |
941 throw new IllegalArgumentException("value " + cst); | |
942 } | |
943 } | |
944 | |
945 /** | |
946 * Adds a number or string constant to the constant pool of the class being | |
947 * build. Does nothing if the constant pool already contains a similar item. | |
948 * <i>This method is intended for {@link Attribute} sub classes, and is | |
949 * normally not needed by class generators or adapters.</i> | |
950 * | |
951 * @param cst the value of the constant to be added to the constant pool. | |
952 * This parameter must be an {@link Integer}, a {@link Float}, a | |
953 * {@link Long}, a {@link Double} or a {@link String}. | |
954 * @return the index of a new or already existing constant item with the | |
955 * given value. | |
956 */ | |
957 public int newConst(final Object cst){ | |
958 return newConstItem(cst).index; | |
959 } | |
960 | |
961 /** | |
962 * Adds an UTF8 string to the constant pool of the class being build. Does | |
963 * nothing if the constant pool already contains a similar item. <i>This | |
964 * method is intended for {@link Attribute} sub classes, and is normally not | |
965 * needed by class generators or adapters.</i> | |
966 * | |
967 * @param value the String value. | |
968 * @return the index of a new or already existing UTF8 item. | |
969 */ | |
970 public int newUTF8(final String value){ | |
971 key.set(UTF8, value, null, null); | |
972 Item result = get(key); | |
973 if(result == null) | |
974 { | |
975 pool.putByte(UTF8).putUTF8(value); | |
976 result = new Item(index++, key); | |
977 put(result); | |
978 } | |
979 return result.index; | |
980 } | |
981 | |
982 /** | |
983 * Adds a class reference to the constant pool of the class being build. | |
984 * Does nothing if the constant pool already contains a similar item. | |
985 * <i>This method is intended for {@link Attribute} sub classes, and is | |
986 * normally not needed by class generators or adapters.</i> | |
987 * | |
988 * @param value the internal name of the class. | |
989 * @return a new or already existing class reference item. | |
990 */ | |
991 Item newClassItem(final String value){ | |
992 key2.set(CLASS, value, null, null); | |
993 Item result = get(key2); | |
994 if(result == null) | |
995 { | |
996 pool.put12(CLASS, newUTF8(value)); | |
997 result = new Item(index++, key2); | |
998 put(result); | |
999 } | |
1000 return result; | |
1001 } | |
1002 | |
1003 /** | |
1004 * Adds a class reference to the constant pool of the class being build. | |
1005 * Does nothing if the constant pool already contains a similar item. | |
1006 * <i>This method is intended for {@link Attribute} sub classes, and is | |
1007 * normally not needed by class generators or adapters.</i> | |
1008 * | |
1009 * @param value the internal name of the class. | |
1010 * @return the index of a new or already existing class reference item. | |
1011 */ | |
1012 public int newClass(final String value){ | |
1013 return newClassItem(value).index; | |
1014 } | |
1015 | |
1016 /** | |
1017 * Adds a field reference to the constant pool of the class being build. | |
1018 * Does nothing if the constant pool already contains a similar item. | |
1019 * | |
1020 * @param owner the internal name of the field's owner class. | |
1021 * @param name the field's name. | |
1022 * @param desc the field's descriptor. | |
1023 * @return a new or already existing field reference item. | |
1024 */ | |
1025 Item newFieldItem(final String owner, final String name, final String desc){ | |
1026 key3.set(FIELD, owner, name, desc); | |
1027 Item result = get(key3); | |
1028 if(result == null) | |
1029 { | |
1030 put122(FIELD, newClass(owner), newNameType(name, desc)); | |
1031 result = new Item(index++, key3); | |
1032 put(result); | |
1033 } | |
1034 return result; | |
1035 } | |
1036 | |
1037 /** | |
1038 * Adds a field reference to the constant pool of the class being build. | |
1039 * Does nothing if the constant pool already contains a similar item. | |
1040 * <i>This method is intended for {@link Attribute} sub classes, and is | |
1041 * normally not needed by class generators or adapters.</i> | |
1042 * | |
1043 * @param owner the internal name of the field's owner class. | |
1044 * @param name the field's name. | |
1045 * @param desc the field's descriptor. | |
1046 * @return the index of a new or already existing field reference item. | |
1047 */ | |
1048 public int newField(final String owner, final String name, final String desc){ | |
1049 return newFieldItem(owner, name, desc).index; | |
1050 } | |
1051 | |
1052 /** | |
1053 * Adds a method reference to the constant pool of the class being build. | |
1054 * Does nothing if the constant pool already contains a similar item. | |
1055 * | |
1056 * @param owner the internal name of the method's owner class. | |
1057 * @param name the method's name. | |
1058 * @param desc the method's descriptor. | |
1059 * @param itf <tt>true</tt> if <tt>owner</tt> is an interface. | |
1060 * @return a new or already existing method reference item. | |
1061 */ | |
1062 Item newMethodItem( | |
1063 final String owner, | |
1064 final String name, | |
1065 final String desc, | |
1066 final boolean itf){ | |
1067 int type = itf ? IMETH : METH; | |
1068 key3.set(type, owner, name, desc); | |
1069 Item result = get(key3); | |
1070 if(result == null) | |
1071 { | |
1072 put122(type, newClass(owner), newNameType(name, desc)); | |
1073 result = new Item(index++, key3); | |
1074 put(result); | |
1075 } | |
1076 return result; | |
1077 } | |
1078 | |
1079 /** | |
1080 * Adds a method reference to the constant pool of the class being build. | |
1081 * Does nothing if the constant pool already contains a similar item. | |
1082 * <i>This method is intended for {@link Attribute} sub classes, and is | |
1083 * normally not needed by class generators or adapters.</i> | |
1084 * | |
1085 * @param owner the internal name of the method's owner class. | |
1086 * @param name the method's name. | |
1087 * @param desc the method's descriptor. | |
1088 * @param itf <tt>true</tt> if <tt>owner</tt> is an interface. | |
1089 * @return the index of a new or already existing method reference item. | |
1090 */ | |
1091 public int newMethod( | |
1092 final String owner, | |
1093 final String name, | |
1094 final String desc, | |
1095 final boolean itf){ | |
1096 return newMethodItem(owner, name, desc, itf).index; | |
1097 } | |
1098 | |
1099 /** | |
1100 * Adds an integer to the constant pool of the class being build. Does | |
1101 * nothing if the constant pool already contains a similar item. | |
1102 * | |
1103 * @param value the int value. | |
1104 * @return a new or already existing int item. | |
1105 */ | |
1106 Item newInteger(final int value){ | |
1107 key.set(value); | |
1108 Item result = get(key); | |
1109 if(result == null) | |
1110 { | |
1111 pool.putByte(INT).putInt(value); | |
1112 result = new Item(index++, key); | |
1113 put(result); | |
1114 } | |
1115 return result; | |
1116 } | |
1117 | |
1118 /** | |
1119 * Adds a float to the constant pool of the class being build. Does nothing | |
1120 * if the constant pool already contains a similar item. | |
1121 * | |
1122 * @param value the float value. | |
1123 * @return a new or already existing float item. | |
1124 */ | |
1125 Item newFloat(final float value){ | |
1126 key.set(value); | |
1127 Item result = get(key); | |
1128 if(result == null) | |
1129 { | |
1130 pool.putByte(FLOAT).putInt(key.intVal); | |
1131 result = new Item(index++, key); | |
1132 put(result); | |
1133 } | |
1134 return result; | |
1135 } | |
1136 | |
1137 /** | |
1138 * Adds a long to the constant pool of the class being build. Does nothing | |
1139 * if the constant pool already contains a similar item. | |
1140 * | |
1141 * @param value the long value. | |
1142 * @return a new or already existing long item. | |
1143 */ | |
1144 Item newLong(final long value){ | |
1145 key.set(value); | |
1146 Item result = get(key); | |
1147 if(result == null) | |
1148 { | |
1149 pool.putByte(LONG).putLong(value); | |
1150 result = new Item(index, key); | |
1151 put(result); | |
1152 index += 2; | |
1153 } | |
1154 return result; | |
1155 } | |
1156 | |
1157 /** | |
1158 * Adds a double to the constant pool of the class being build. Does nothing | |
1159 * if the constant pool already contains a similar item. | |
1160 * | |
1161 * @param value the double value. | |
1162 * @return a new or already existing double item. | |
1163 */ | |
1164 Item newDouble(final double value){ | |
1165 key.set(value); | |
1166 Item result = get(key); | |
1167 if(result == null) | |
1168 { | |
1169 pool.putByte(DOUBLE).putLong(key.longVal); | |
1170 result = new Item(index, key); | |
1171 put(result); | |
1172 index += 2; | |
1173 } | |
1174 return result; | |
1175 } | |
1176 | |
1177 /** | |
1178 * Adds a string to the constant pool of the class being build. Does nothing | |
1179 * if the constant pool already contains a similar item. | |
1180 * | |
1181 * @param value the String value. | |
1182 * @return a new or already existing string item. | |
1183 */ | |
1184 private Item newString(final String value){ | |
1185 key2.set(STR, value, null, null); | |
1186 Item result = get(key2); | |
1187 if(result == null) | |
1188 { | |
1189 pool.put12(STR, newUTF8(value)); | |
1190 result = new Item(index++, key2); | |
1191 put(result); | |
1192 } | |
1193 return result; | |
1194 } | |
1195 | |
1196 /** | |
1197 * Adds a name and type to the constant pool of the class being build. Does | |
1198 * nothing if the constant pool already contains a similar item. <i>This | |
1199 * method is intended for {@link Attribute} sub classes, and is normally not | |
1200 * needed by class generators or adapters.</i> | |
1201 * | |
1202 * @param name a name. | |
1203 * @param desc a type descriptor. | |
1204 * @return the index of a new or already existing name and type item. | |
1205 */ | |
1206 public int newNameType(final String name, final String desc){ | |
1207 key2.set(NAME_TYPE, name, desc, null); | |
1208 Item result = get(key2); | |
1209 if(result == null) | |
1210 { | |
1211 put122(NAME_TYPE, newUTF8(name), newUTF8(desc)); | |
1212 result = new Item(index++, key2); | |
1213 put(result); | |
1214 } | |
1215 return result.index; | |
1216 } | |
1217 | |
1218 /** | |
1219 * Adds the given internal name to {@link #typeTable} and returns its index. | |
1220 * Does nothing if the type table already contains this internal name. | |
1221 * | |
1222 * @param type the internal name to be added to the type table. | |
1223 * @return the index of this internal name in the type table. | |
1224 */ | |
1225 int addType(final String type){ | |
1226 key.set(TYPE_NORMAL, type, null, null); | |
1227 Item result = get(key); | |
1228 if(result == null) | |
1229 { | |
1230 result = addType(key); | |
1231 } | |
1232 return result.index; | |
1233 } | |
1234 | |
1235 /** | |
1236 * Adds the given "uninitialized" type to {@link #typeTable} and returns its | |
1237 * index. This method is used for UNINITIALIZED types, made of an internal | |
1238 * name and a bytecode offset. | |
1239 * | |
1240 * @param type the internal name to be added to the type table. | |
1241 * @param offset the bytecode offset of the NEW instruction that created | |
1242 * this UNINITIALIZED type value. | |
1243 * @return the index of this internal name in the type table. | |
1244 */ | |
1245 int addUninitializedType(final String type, final int offset){ | |
1246 key.type = TYPE_UNINIT; | |
1247 key.intVal = offset; | |
1248 key.strVal1 = type; | |
1249 key.hashCode = 0x7FFFFFFF & (TYPE_UNINIT + type.hashCode() + offset); | |
1250 Item result = get(key); | |
1251 if(result == null) | |
1252 { | |
1253 result = addType(key); | |
1254 } | |
1255 return result.index; | |
1256 } | |
1257 | |
1258 /** | |
1259 * Adds the given Item to {@link #typeTable}. | |
1260 * | |
1261 * @param item the value to be added to the type table. | |
1262 * @return the added Item, which a new Item instance with the same value as | |
1263 * the given Item. | |
1264 */ | |
1265 private Item addType(final Item item){ | |
1266 ++typeCount; | |
1267 Item result = new Item(typeCount, key); | |
1268 put(result); | |
1269 if(typeTable == null) | |
1270 { | |
1271 typeTable = new Item[16]; | |
1272 } | |
1273 if(typeCount == typeTable.length) | |
1274 { | |
1275 Item[] newTable = new Item[2 * typeTable.length]; | |
1276 System.arraycopy(typeTable, 0, newTable, 0, typeTable.length); | |
1277 typeTable = newTable; | |
1278 } | |
1279 typeTable[typeCount] = result; | |
1280 return result; | |
1281 } | |
1282 | |
1283 /** | |
1284 * Returns the index of the common super type of the two given types. This | |
1285 * method calls {@link #getCommonSuperClass} and caches the result in the | |
1286 * {@link #items} hash table to speedup future calls with the same | |
1287 * parameters. | |
1288 * | |
1289 * @param type1 index of an internal name in {@link #typeTable}. | |
1290 * @param type2 index of an internal name in {@link #typeTable}. | |
1291 * @return the index of the common super type of the two given types. | |
1292 */ | |
1293 int getMergedType(final int type1, final int type2){ | |
1294 key2.type = TYPE_MERGED; | |
1295 key2.longVal = type1 | (((long) type2) << 32); | |
1296 key2.hashCode = 0x7FFFFFFF & (TYPE_MERGED + type1 + type2); | |
1297 Item result = get(key2); | |
1298 if(result == null) | |
1299 { | |
1300 String t = typeTable[type1].strVal1; | |
1301 String u = typeTable[type2].strVal1; | |
1302 key2.intVal = addType(getCommonSuperClass(t, u)); | |
1303 result = new Item((short) 0, key2); | |
1304 put(result); | |
1305 } | |
1306 return result.intVal; | |
1307 } | |
1308 | |
1309 /** | |
1310 * Returns the common super type of the two given types. The default | |
1311 * implementation of this method <i>loads<i> the two given classes and uses | |
1312 * the java.lang.Class methods to find the common super class. It can be | |
1313 * overriden to compute this common super type in other ways, in particular | |
1314 * without actually loading any class, or to take into account the class | |
1315 * that is currently being generated by this ClassWriter, which can of | |
1316 * course not be loaded since it is under construction. | |
1317 * | |
1318 * @param type1 the internal name of a class. | |
1319 * @param type2 the internal name of another class. | |
1320 * @return the internal name of the common super class of the two given | |
1321 * classes. | |
1322 */ | |
1323 protected String getCommonSuperClass(final String type1, final String type2){ | |
1324 Class c, d; | |
1325 try | |
1326 { | |
1327 c = Class.forName(type1.replace('/', '.')); | |
1328 d = Class.forName(type2.replace('/', '.')); | |
1329 } | |
1330 catch(ClassNotFoundException e) | |
1331 { | |
1332 throw new RuntimeException(e); | |
1333 } | |
1334 if(c.isAssignableFrom(d)) | |
1335 { | |
1336 return type1; | |
1337 } | |
1338 if(d.isAssignableFrom(c)) | |
1339 { | |
1340 return type2; | |
1341 } | |
1342 if(c.isInterface() || d.isInterface()) | |
1343 { | |
1344 return "java/lang/Object"; | |
1345 } | |
1346 else | |
1347 { | |
1348 do | |
1349 { | |
1350 c = c.getSuperclass(); | |
1351 } while(!c.isAssignableFrom(d)); | |
1352 return c.getName().replace('.', '/'); | |
1353 } | |
1354 } | |
1355 | |
1356 /** | |
1357 * Returns the constant pool's hash table item which is equal to the given | |
1358 * item. | |
1359 * | |
1360 * @param key a constant pool item. | |
1361 * @return the constant pool's hash table item which is equal to the given | |
1362 * item, or <tt>null</tt> if there is no such item. | |
1363 */ | |
1364 private Item get(final Item key){ | |
1365 Item i = items[key.hashCode % items.length]; | |
1366 while(i != null && !key.isEqualTo(i)) | |
1367 { | |
1368 i = i.next; | |
1369 } | |
1370 return i; | |
1371 } | |
1372 | |
1373 /** | |
1374 * Puts the given item in the constant pool's hash table. The hash table | |
1375 * <i>must</i> not already contains this item. | |
1376 * | |
1377 * @param i the item to be added to the constant pool's hash table. | |
1378 */ | |
1379 private void put(final Item i){ | |
1380 if(index > threshold) | |
1381 { | |
1382 int ll = items.length; | |
1383 int nl = ll * 2 + 1; | |
1384 Item[] newItems = new Item[nl]; | |
1385 for(int l = ll - 1; l >= 0; --l) | |
1386 { | |
1387 Item j = items[l]; | |
1388 while(j != null) | |
1389 { | |
1390 int index = j.hashCode % newItems.length; | |
1391 Item k = j.next; | |
1392 j.next = newItems[index]; | |
1393 newItems[index] = j; | |
1394 j = k; | |
1395 } | |
1396 } | |
1397 items = newItems; | |
1398 threshold = (int) (nl * 0.75); | |
1399 } | |
1400 int index = i.hashCode % items.length; | |
1401 i.next = items[index]; | |
1402 items[index] = i; | |
1403 } | |
1404 | |
1405 /** | |
1406 * Puts one byte and two shorts into the constant pool. | |
1407 * | |
1408 * @param b a byte. | |
1409 * @param s1 a short. | |
1410 * @param s2 another short. | |
1411 */ | |
1412 private void put122(final int b, final int s1, final int s2){ | |
1413 pool.put12(b, s1).putShort(s2); | |
1414 } | |
1415 } |