File: asdl_antlr.py

package info (click to toggle)
jython 2.5.3-3
  • links: PTS, VCS
  • area: main
  • in suites: jessie-kfreebsd
  • size: 43,304 kB
  • sloc: python: 351,314; java: 216,338; xml: 1,547; sh: 330; perl: 124; ansic: 102; makefile: 101
file content (698 lines) | stat: -rw-r--r-- 27,594 bytes parent folder | download | duplicates (5)
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
#! /usr/bin/env python
"""Generate Java code from an ASDL description."""

# TO DO
# handle fields that have a type but no name

import os, sys, traceback

import asdl

TABSIZE = 4
MAX_COL = 100

def reflow_lines(s, depth):
    """Reflow the line s indented depth tabs.

    Return a sequence of lines where no line extends beyond MAX_COL
    when properly indented.  The first line is properly indented based
    exclusively on depth * TABSIZE.  All following lines -- these are
    the reflowed lines generated by this function -- start at the same
    column as the first character beyond the opening { in the first
    line.
    """
    size = MAX_COL - depth * TABSIZE
    if len(s) < size:
        return [s]

    lines = []
    cur = s
    padding = ""
    while len(cur) > size:
        i = cur.rfind(' ', 0, size)
        assert i != -1, "Impossible line to reflow: %s" % `s`
        lines.append(padding + cur[:i])
        if len(lines) == 1:
            # find new size based on brace
            j = cur.find('{', 0, i)
            if j >= 0:
                j += 2 # account for the brace and the space after it
                size -= j
                padding = " " * j
        cur = cur[i+1:]
    else:
        lines.append(padding + cur)
    return lines

class EmitVisitor(asdl.VisitorBase):
    """Visit that emits lines"""

    def __init__(self, dir):
        self.dir = dir
        super(EmitVisitor, self).__init__()

    def open(self, package, name, refersToPythonTree=1, useDataOutput=0):
        path = os.path.join(self.dir, package, "%s.java" % name)
        open(path, "w")
        self.file = open(os.path.join(self.dir, package, "%s.java" % name), "w")
        print >> self.file, "// Autogenerated AST node"
        print >> self.file, 'package org.python.antlr.%s;' % package
        if refersToPythonTree:
            print >> self.file, 'import org.antlr.runtime.CommonToken;'
            print >> self.file, 'import org.antlr.runtime.Token;'
            print >> self.file, 'import org.python.antlr.AST;'
            print >> self.file, 'import org.python.antlr.PythonTree;'
            print >> self.file, 'import org.python.antlr.adapter.AstAdapters;'
            print >> self.file, 'import org.python.antlr.base.excepthandler;'
            print >> self.file, 'import org.python.antlr.base.expr;'
            print >> self.file, 'import org.python.antlr.base.mod;'
            print >> self.file, 'import org.python.antlr.base.slice;'
            print >> self.file, 'import org.python.antlr.base.stmt;'
            print >> self.file, 'import org.python.core.ArgParser;'
            print >> self.file, 'import org.python.core.AstList;'
            print >> self.file, 'import org.python.core.Py;'
            print >> self.file, 'import org.python.core.PyObject;'
            print >> self.file, 'import org.python.core.PyString;'
            print >> self.file, 'import org.python.core.PyType;'
            print >> self.file, 'import org.python.expose.ExposedGet;'
            print >> self.file, 'import org.python.expose.ExposedMethod;'
            print >> self.file, 'import org.python.expose.ExposedNew;'
            print >> self.file, 'import org.python.expose.ExposedSet;'
            print >> self.file, 'import org.python.expose.ExposedType;'

        if useDataOutput:
            print >> self.file, 'import java.io.DataOutputStream;'
            print >> self.file, 'import java.io.IOException;'
            print >> self.file, 'import java.util.ArrayList;'
        print >> self.file
    
    def close(self):
        self.file.close()

    def emit(self, s, depth):
        # XXX reflow long lines?
        lines = reflow_lines(s, depth)
        for line in lines:
            line = (" " * TABSIZE * depth) + line + "\n"
            self.file.write(line)



# This step will add a 'simple' boolean attribute to all Sum and Product 
# nodes and add a 'typedef' link to each Field node that points to the
# Sum or Product node that defines the field.

class AnalyzeVisitor(EmitVisitor):
    index = 0
    def makeIndex(self):
        self.index += 1
        return self.index

    def visitModule(self, mod):
        self.types = {}
        for dfn in mod.dfns:
            self.types[str(dfn.name)] = dfn.value
        for dfn in mod.dfns:
            self.visit(dfn)

    def visitType(self, type, depth=0):
        self.visit(type.value, type.name, depth)

    def visitSum(self, sum, name, depth):
        sum.simple = 1
        for t in sum.types:
            if t.fields:
                sum.simple = 0
                break
        for t in sum.types:
            if not sum.simple:
                t.index = self.makeIndex()
            self.visit(t, name, depth)

    def visitProduct(self, product, name, depth):
        product.simple = 0
        product.index = self.makeIndex()
        for f in product.fields:
            self.visit(f, depth + 1)

    def visitConstructor(self, cons, name, depth):
        for f in cons.fields:
            self.visit(f, depth + 1)

    def visitField(self, field, depth):
        field.typedef = self.types.get(str(field.type))

# The code generator itself.
#
class JavaVisitor(EmitVisitor):
    def visitModule(self, mod):
        for dfn in mod.dfns:
            self.visit(dfn)

    def visitType(self, type, depth=0):
        self.visit(type.value, type.name, depth)

    def visitSum(self, sum, name, depth):
        if sum.simple and not name == "excepthandler":
            self.simple_sum(sum, name, depth)
            self.simple_sum_wrappers(sum, name, depth)
        else:
            self.sum_with_constructor(sum, name, depth)

    def simple_sum(self, sum, name, depth):
        self.open("ast", "%sType" % name, refersToPythonTree=0)
        self.emit('import org.python.antlr.AST;', depth)
        self.emit('', 0)

        self.emit("public enum %(name)sType {" % locals(), depth)
        self.emit("UNDEFINED,", depth + 1)
        for i in range(len(sum.types) - 1):
            type = sum.types[i]
            self.emit("%s," % type.name, depth + 1)
        self.emit("%s;" % sum.types[len(sum.types) - 1].name, depth + 1)

        self.emit("}", depth)
        self.close()

    def simple_sum_wrappers(self, sum, name, depth):
        for i in range(len(sum.types)):
            type = sum.types[i]
            self.open("op", type.name, refersToPythonTree=0)
            self.emit('import org.python.antlr.AST;', depth)
            self.emit('import org.python.antlr.PythonTree;', depth)
            self.emit('import org.python.core.Py;', depth)
            self.emit('import org.python.core.PyObject;', depth)
            self.emit('import org.python.core.PyString;', depth)
            self.emit('import org.python.core.PyType;', depth)
            self.emit('import org.python.expose.ExposedGet;', depth)
            self.emit('import org.python.expose.ExposedMethod;', depth)
            self.emit('import org.python.expose.ExposedNew;', depth)
            self.emit('import org.python.expose.ExposedSet;', depth)
            self.emit('import org.python.expose.ExposedType;', depth)
            self.emit('', 0)

            self.emit('@ExposedType(name = "_ast.%s", base = AST.class)' % type.name, depth)
            self.emit("public class %s extends PythonTree {" % type.name, depth)
            self.emit('public static final PyType TYPE = PyType.fromClass(%s.class);' % type.name, depth + 1)
            self.emit('', 0)

            self.emit("public %s() {" % (type.name), depth)
            self.emit("}", depth)
            self.emit('', 0)

            self.emit("public %s(PyType subType) {" % (type.name), depth)
            self.emit("super(subType);", depth + 1)
            self.emit("}", depth)
            self.emit('', 0)

            self.emit("@ExposedNew", depth)
            self.emit("@ExposedMethod", depth)
            self.emit("public void %s___init__(PyObject[] args, String[] keywords) {}" % type.name, depth)
            self.emit('', 0)

            self.attributes(type, name, depth);

            self.emit('@ExposedMethod', depth + 1)
            self.emit('public PyObject __int__() {', depth + 1)
            self.emit("return %s___int__();" % type.name, depth + 2)
            self.emit("}", depth + 1)
            self.emit('', 0)

            self.emit("final PyObject %s___int__() {" % type.name, depth + 1)
            self.emit('return Py.newInteger(%s);' % str(i + 1), depth + 2)
            self.emit("}", depth + 1)
            self.emit('', 0)

            self.emit("}", depth)
            self.close()


    def attributes(self, obj, name, depth):
        field_list = []
        if hasattr(obj, "fields"):
            for f in obj.fields:
                field_list.append('new PyString("%s")' % f.name)
        if len(field_list) > 0:
            self.emit("private final static PyString[] fields =", depth + 1)
            self.emit("new PyString[] {%s};" % ", ".join(field_list), depth+1)
            self.emit('@ExposedGet(name = "_fields")', depth + 1)
            self.emit("public PyString[] get_fields() { return fields; }", depth+1)
            self.emit("", 0)
        else:
            self.emit("private final static PyString[] fields = new PyString[0];", depth+1)
            self.emit('@ExposedGet(name = "_fields")', depth + 1)
            self.emit("public PyString[] get_fields() { return fields; }", depth+1)
            self.emit("", 0)

        if str(name) in ('stmt', 'expr', 'excepthandler'):
            att_list = ['new PyString("lineno")', 'new PyString("col_offset")']
            self.emit("private final static PyString[] attributes =", depth + 1)
            self.emit("new PyString[] {%s};" % ", ".join(att_list), depth + 1)
            self.emit('@ExposedGet(name = "_attributes")', depth + 1)
            self.emit("public PyString[] get_attributes() { return attributes; }", depth + 1)
            self.emit("", 0)
        else:
            self.emit("private final static PyString[] attributes = new PyString[0];", depth+1)
            self.emit('@ExposedGet(name = "_attributes")', depth + 1)
            self.emit("public PyString[] get_attributes() { return attributes; }", depth+1)
            self.emit("", 0)
   
    def sum_with_constructor(self, sum, name, depth):
        self.open("base", "%s" % name)

        self.emit('@ExposedType(name = "_ast.%s", base = AST.class)' % name, depth)
        self.emit("public abstract class %(name)s extends PythonTree {" %
                    locals(), depth)
        self.emit("", 0)
        self.emit("public static final PyType TYPE = PyType.fromClass(%s.class);" % name, depth + 1);

        self.attributes(sum, name, depth);

        self.emit("public %(name)s() {" % locals(), depth+1)
        self.emit("}", depth+1)
        self.emit("", 0)

        self.emit("public %(name)s(PyType subType) {" % locals(), depth+1)
        self.emit("}", depth+1)
        self.emit("", 0)

        self.emit("public %(name)s(int ttype, Token token) {" % locals(), depth+1)
        self.emit("super(ttype, token);", depth+2)
        self.emit("}", depth+1)
        self.emit("", 0)

        self.emit("public %(name)s(Token token) {" % locals(), depth+1)
        self.emit("super(token);", depth+2)
        self.emit("}", depth+1)
        self.emit("", 0)

        self.emit("public %(name)s(PythonTree node) {" % locals(), depth+1)
        self.emit("super(node);", depth+2)
        self.emit("}", depth+1)
        self.emit("", 0)

        self.emit("}", depth)
        self.close()
        for t in sum.types:
            self.visit(t, name, depth)

    def visitProduct(self, product, name, depth):

        self.open("ast", "%s" % name, useDataOutput=1)
        self.emit('@ExposedType(name = "_ast.%s", base = AST.class)' % name, depth)
        self.emit("public class %(name)s extends PythonTree {" % locals(), depth)
        self.emit("public static final PyType TYPE = PyType.fromClass(%s.class);" % name, depth + 1);
        for f in product.fields:
            self.visit(f, depth + 1)
        self.emit("", depth)

        self.attributes(product, name, depth)

        self.javaMethods(product, name, name, True, product.fields,
                         depth+1)

        self.emit("}", depth)
        self.close()

    def visitConstructor(self, cons, name, depth):
        self.open("ast", cons.name, useDataOutput=1)
        ifaces = []
        for f in cons.fields:
            if str(f.type) == "expr_context":
                ifaces.append("Context")
        if ifaces:
            s = "implements %s " % ", ".join(ifaces)
        else:
            s = ""
        self.emit('@ExposedType(name = "_ast.%s", base = AST.class)' % cons.name, depth);
        self.emit("public class %s extends %s %s{" %
                    (cons.name, name, s), depth)
        self.emit("public static final PyType TYPE = PyType.fromClass(%s.class);" % cons.name, depth);
        for f in cons.fields:
            self.visit(f, depth + 1)
        self.emit("", depth)

        self.attributes(cons, name, depth)

        self.javaMethods(cons, name, cons.name, False, cons.fields, depth+1)

        if "Context" in ifaces:
            self.emit("public void setContext(expr_contextType c) {", depth + 1)
            self.emit('this.ctx = c;', depth + 2)
            self.emit("}", depth + 1)
            self.emit("", 0)

        if str(name) in ('stmt', 'expr', 'excepthandler'):
            # The lineno property
            self.emit("private int lineno = -1;", depth + 1)
            self.emit('@ExposedGet(name = "lineno")', depth + 1)
            self.emit("public int getLineno() {", depth + 1)
            self.emit("if (lineno != -1) {", depth + 2);
            self.emit("return lineno;", depth + 3);
            self.emit("}", depth + 2)
            self.emit('return getLine();', depth + 2)
            self.emit("}", depth + 1)
            self.emit("", 0)
            self.emit('@ExposedSet(name = "lineno")', depth + 1)
            self.emit("public void setLineno(int num) {", depth + 1)
            self.emit("lineno = num;", depth + 2);
            self.emit("}", depth + 1)
            self.emit("", 0)

            # The col_offset property
            self.emit("private int col_offset = -1;", depth + 1)
            self.emit('@ExposedGet(name = "col_offset")', depth + 1)
            self.emit("public int getCol_offset() {", depth + 1)
            self.emit("if (col_offset != -1) {", depth + 2);
            self.emit("return col_offset;", depth + 3);
            self.emit("}", depth + 2)
            self.emit('return getCharPositionInLine();', depth + 2)
            self.emit("}", depth + 1)
            self.emit("", 0)
            self.emit('@ExposedSet(name = "col_offset")', depth + 1)
            self.emit("public void setCol_offset(int num) {", depth + 1)
            self.emit("col_offset = num;", depth + 2);
            self.emit("}", depth + 1)
            self.emit("", 0)


        self.emit("}", depth)
        self.close()

    def javaConstructorHelper(self, fields, depth):
        for f in fields:
            #if f.seq:
            #    self.emit("this.%s = new %s(%s);" % (f.name,
            #        self.javaType(f), f.name), depth+1)
            #else:
            self.emit("this.%s = %s;" % (f.name, f.name), depth+1)

            fparg = self.fieldDef(f)

            not_simple = True
            if f.typedef is not None and f.typedef.simple:
                not_simple = False
            #For now ignoring String -- will want to revisit
            if not_simple and fparg.find("String") == -1:
                if f.seq:
                    self.emit("if (%s == null) {" % f.name, depth+1);
                    self.emit("this.%s = new ArrayList<%s>();" % (f.name, self.javaType(f, False)), depth+2)
                    self.emit("}", depth+1)
                    self.emit("for(PythonTree t : this.%(name)s) {" % {"name":f.name}, depth+1)
                    self.emit("addChild(t);", depth+2)
                    self.emit("}", depth+1)
                elif str(f.type) == "expr":
                    self.emit("addChild(%s);" % (f.name), depth+1)

    #XXX: this method used to emit a pickle(DataOutputStream ostream) for cPickle support.
    #     If we want to re-add it, see Jython 2.2's pickle method in its ast nodes.
    def javaMethods(self, type, name, clsname, is_product, fields, depth):

        self.javaConstructors(type, name, clsname, is_product, fields, depth)

        # The toString() method
        self.emit('@ExposedGet(name = "repr")', depth)
        self.emit("public String toString() {", depth)
        self.emit('return "%s";' % clsname, depth+1)
        self.emit("}", depth)
        self.emit("", 0)

        # The toStringTree() method
        self.emit("public String toStringTree() {", depth)
        self.emit('StringBuffer sb = new StringBuffer("%s(");' % clsname,
                    depth+1)
        for f in fields:
            self.emit('sb.append("%s=");' % f.name, depth+1)
            self.emit("sb.append(dumpThis(%s));" % f.name, depth+1)
            self.emit('sb.append(",");', depth+1)
        self.emit('sb.append(")");', depth+1)
        self.emit("return sb.toString();", depth+1)
        self.emit("}", depth)
        self.emit("", 0)

        # The accept() method
        self.emit("public <R> R accept(VisitorIF<R> visitor) throws Exception {", depth)
        if is_product:
            self.emit('traverse(visitor);' % clsname, depth+1)
            self.emit('return null;' % clsname, depth+1)
        else:
            self.emit('return visitor.visit%s(this);' % clsname, depth+1)
        self.emit("}", depth)
        self.emit("", 0)

        # The visitChildren() method
        self.emit("public void traverse(VisitorIF<?> visitor) throws Exception {", depth)
        for f in fields:
            if self.bltinnames.has_key(str(f.type)):
                continue
            if f.typedef.simple:
                continue
            if f.seq:
                self.emit('if (%s != null) {' % f.name, depth+1)
                self.emit('for (PythonTree t : %s) {' % f.name,
                        depth+2)
                self.emit('if (t != null)', depth+3)
                self.emit('t.accept(visitor);', depth+4)
                self.emit('}', depth+2)
                self.emit('}', depth+1)
            else:
                self.emit('if (%s != null)' % f.name, depth+1)
                self.emit('%s.accept(visitor);' % f.name, depth+2)
        self.emit('}', depth)
        self.emit("", 0)

    def javaConstructors(self, type, name, clsname, is_product, fields, depth):
        self.emit("public %s(PyType subType) {" % (clsname), depth)
        self.emit("super(subType);", depth + 1)
        self.emit("}", depth)

        if len(fields) > 0:
            self.emit("public %s() {" % (clsname), depth)
            self.emit("this(TYPE);", depth + 1)
            self.emit("}", depth)
            fnames = ['"%s"' % f.name for f in fields]
        else:
            fnames = []

        if str(name) in ('stmt', 'expr', 'excepthandler'):
            fnames.extend(['"lineno"', '"col_offset"'])
        fpargs = ", ".join(fnames)
        self.emit("@ExposedNew", depth)
        self.emit("@ExposedMethod", depth)
        self.emit("public void %s___init__(PyObject[] args, String[] keywords) {" % clsname, depth)
        self.emit('ArgParser ap = new ArgParser("%s", args, keywords, new String[]' % clsname, depth + 1)
        self.emit('{%s}, %s, true);' % (fpargs, len(fields)), depth + 2)
        i = 0
        for f in fields:
            self.emit("set%s(ap.getPyObject(%s, Py.None));" % (self.processFieldName(f.name),
                str(i)), depth+1)
            i += 1
        if str(name) in ('stmt', 'expr', 'excepthandler'):
            self.emit("int lin = ap.getInt(%s, -1);" % str(i), depth + 1) 
            self.emit("if (lin != -1) {", depth + 1) 
            self.emit("setLineno(lin);", depth + 2) 
            self.emit("}", depth + 1)
            self.emit("", 0)

            self.emit("int col = ap.getInt(%s, -1);" % str(i+1), depth + 1) 
            self.emit("if (col != -1) {", depth + 1) 
            self.emit("setLineno(col);", depth + 2) 
            self.emit("}", depth + 1)
            self.emit("", 0)

        self.emit("}", depth)
        self.emit("", 0)

        fpargs = ", ".join(["PyObject %s" % f.name for f in fields])
        self.emit("public %s(%s) {" % (clsname, fpargs), depth)
        for f in fields:
            self.emit("set%s(%s);" % (self.processFieldName(f.name), f.name), depth+1)
        self.emit("}", depth)
        self.emit("", 0)

        token = asdl.Field('Token', 'token')
        token.typedef = False
        fpargs = ", ".join([self.fieldDef(f) for f in [token] + fields])
        self.emit("public %s(%s) {" % (clsname, fpargs), depth)
        self.emit("super(token);", depth+1)
        self.javaConstructorHelper(fields, depth)
        self.emit("}", depth)
        self.emit("", 0)

        ttype = asdl.Field('int', 'ttype')
        ttype.typedef = False
        fpargs = ", ".join([self.fieldDef(f) for f in [ttype, token] + fields])
        self.emit("public %s(%s) {" % (clsname, fpargs), depth)
        self.emit("super(ttype, token);", depth+1)
        self.javaConstructorHelper(fields, depth)
        self.emit("}", depth)
        self.emit("", 0)

        tree = asdl.Field('PythonTree', 'tree')
        tree.typedef = False
        fpargs = ", ".join([self.fieldDef(f) for f in [tree] + fields])
        self.emit("public %s(%s) {" % (clsname, fpargs), depth)
        self.emit("super(tree);", depth+1)
        self.javaConstructorHelper(fields, depth)
        self.emit("}", depth)
        self.emit("", 0)


    #This is mainly a kludge to turn get/setType -> get/setExceptType because
    #getType conflicts with a method on PyObject.
    def processFieldName(self, name):
        name = str(name).capitalize()
        if name == "Type":
            name = "ExceptType"
        return name

    def visitField(self, field, depth):
        self.emit("private %s;" % self.fieldDef(field), depth)
        self.emit("public %s getInternal%s() {" % (self.javaType(field),
            str(field.name).capitalize()), depth)
        self.emit("return %s;" % field.name, depth+1)
        self.emit("}", depth)
        self.emit('@ExposedGet(name = "%s")' % field.name, depth)
        self.emit("public PyObject get%s() {" % self.processFieldName(field.name), depth)
        if field.seq:
            self.emit("return new AstList(%s, AstAdapters.%sAdapter);" % (field.name, field.type), depth+1)
        else:
            if str(field.type) == 'identifier':
                self.emit("if (%s == null) return Py.None;" % field.name, depth+1)
                self.emit("return new PyString(%s);" % field.name, depth+1)
            elif str(field.type) == 'string' or str(field.type) == 'object':
                self.emit("return (PyObject)%s;" % field.name, depth+1)
            elif str(field.type) == 'bool':
                self.emit("if (%s) return Py.True;" % field.name, depth+1)
                self.emit("return Py.False;" % field.name, depth+1)
            elif str(field.type) == 'int':
                self.emit("return Py.newInteger(%s);" % field.name, depth+1)
            elif field.typedef.simple:
                self.emit("return AstAdapters.%s2py(%s);" % (str(field.type), field.name), depth+1)
            else:
                self.emit("return %s;" % field.name, depth+1)
            #self.emit("return Py.None;", depth+1)
        self.emit("}", depth)
        self.emit('@ExposedSet(name = "%s")' % field.name, depth)
        self.emit("public void set%s(PyObject %s) {" % (self.processFieldName(field.name), field.name), depth)
        if field.seq:
            #self.emit("this.%s = new %s(" % (field.name, self.javaType(field)), depth+1)
            self.emit("this.%s = AstAdapters.py2%sList(%s);" % (field.name, str(field.type), field.name), depth+1)
        else:
            self.emit("this.%s = AstAdapters.py2%s(%s);" % (field.name, str(field.type), field.name), depth+1)
        self.emit("}", depth)
        self.emit("", 0)

    bltinnames = {
        'int' : 'Integer',
        'bool' : 'Boolean',
        'identifier' : 'String',
        'string' : 'Object',
        'object' : 'Object', # was PyObject

        #Below are for enums
        'boolop' : 'boolopType',
        'cmpop' : 'cmpopType',
        'expr_context' : 'expr_contextType',
        'operator' : 'operatorType',
        'unaryop' : 'unaryopType',
    }

    def fieldDef(self, field):
        jtype = self.javaType(field)
        name = field.name
        return "%s %s" % (jtype, name)

    def javaType(self, field, check_seq=True):
        jtype = str(field.type)
        jtype = self.bltinnames.get(jtype, jtype)
        if check_seq and field.seq:
            return "java.util.List<%s>" % jtype
        return jtype

class VisitorVisitor(EmitVisitor):
    def __init__(self, dir):
        EmitVisitor.__init__(self, dir)
        self.ctors = []

    def visitModule(self, mod):
        for dfn in mod.dfns:
            self.visit(dfn)
        self.open("ast", "VisitorIF", refersToPythonTree=0)
        self.emit('public interface VisitorIF<R> {', 0)
        for ctor in self.ctors:
            self.emit("public R visit%s(%s node) throws Exception;" % 
                    (ctor, ctor), 1)
        self.emit('}', 0)
        self.close()

        self.open("ast", "VisitorBase")
        self.emit('public abstract class VisitorBase<R> implements VisitorIF<R> {', 0)
        for ctor in self.ctors:
            self.emit("public R visit%s(%s node) throws Exception {" % 
                    (ctor, ctor), 1)
            self.emit("R ret = unhandled_node(node);", 2)
            self.emit("traverse(node);", 2)
            self.emit("return ret;", 2)
            self.emit('}', 1)
            self.emit('', 0)

        self.emit("abstract protected R unhandled_node(PythonTree node) throws Exception;", 1)
        self.emit("abstract public void traverse(PythonTree node) throws Exception;", 1)
        self.emit('}', 0)
        self.close()

    def visitType(self, type, depth=1):
        self.visit(type.value, type.name, depth)

    def visitSum(self, sum, name, depth):
        if not sum.simple:
            for t in sum.types:
                self.visit(t, name, depth)

    def visitProduct(self, product, name, depth):
        pass

    def visitConstructor(self, cons, name, depth):
        self.ctors.append(cons.name)

class ChainOfVisitors:
    def __init__(self, *visitors):
        self.visitors = visitors

    def visit(self, object):
        for v in self.visitors:
            v.visit(object)

def main(outdir, grammar="Python.asdl"):
    mod = asdl.parse(grammar)
    if not asdl.check(mod):
        sys.exit(1)
    c = ChainOfVisitors(AnalyzeVisitor(outdir),
                        JavaVisitor(outdir),
                        VisitorVisitor(outdir))
    c.visit(mod)

if __name__ == "__main__":
    import sys
    import getopt

    usage = "Usage: python %s [-o outdir] [grammar]" % sys.argv[0]

    OUT_DIR = '../src/org/python/antlr/'
    try:
        opts, args = getopt.getopt(sys.argv[1:], 'o:')
    except:
       print usage
       sys.exit(1)
    for o, v in opts:
        if o == '-o' and v != '':
            OUT_DIR = v
    if len(opts) > 1 or len(args) > 1:
        print usage
        sys.exit(1)
    if len(args) == 1:
        main(OUT_DIR, args[0])
    else:
        main(OUT_DIR)