1 // Protocol Buffers - Google's data interchange format
2 // Copyright 2008 Google Inc. All rights reserved.
3 // https://developers.google.com/protocol-buffers/
4 //
5 // Redistribution and use in source and binary forms, with or without
6 // modification, are permitted provided that the following conditions are
7 // met:
8 //
9 // * Redistributions of source code must retain the above copyright
10 // notice, this list of conditions and the following disclaimer.
11 // * Redistributions in binary form must reproduce the above
12 // copyright notice, this list of conditions and the following disclaimer
13 // in the documentation and/or other materials provided with the
14 // distribution.
15 // * Neither the name of Google Inc. nor the names of its
16 // contributors may be used to endorse or promote products derived from
17 // this software without specific prior written permission.
18 //
19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30
31 // Author: dweis@google.com (Daniel Weis)
32 // Based on original Protocol Buffers design by
33 // Sanjay Ghemawat, Jeff Dean, and others.
34
35 #include <google/protobuf/compiler/java/java_message_builder.h>
36
37 #include <algorithm>
38 #include <map>
39 #include <memory>
40 #include <vector>
41
42 #include <google/protobuf/compiler/java/java_context.h>
43 #include <google/protobuf/compiler/java/java_doc_comment.h>
44 #include <google/protobuf/compiler/java/java_enum.h>
45 #include <google/protobuf/compiler/java/java_extension.h>
46 #include <google/protobuf/compiler/java/java_generator_factory.h>
47 #include <google/protobuf/compiler/java/java_helpers.h>
48 #include <google/protobuf/compiler/java/java_name_resolver.h>
49 #include <google/protobuf/descriptor.pb.h>
50 #include <google/protobuf/io/coded_stream.h>
51 #include <google/protobuf/io/printer.h>
52 #include <google/protobuf/wire_format.h>
53 #include <google/protobuf/stubs/strutil.h>
54 #include <google/protobuf/stubs/substitute.h>
55
56
57
58 namespace google {
59 namespace protobuf {
60 namespace compiler {
61 namespace java {
62
63 namespace {
MapValueImmutableClassdName(const Descriptor * descriptor,ClassNameResolver * name_resolver)64 std::string MapValueImmutableClassdName(const Descriptor* descriptor,
65 ClassNameResolver* name_resolver) {
66 const FieldDescriptor* value_field = descriptor->FindFieldByName("value");
67 GOOGLE_CHECK_EQ(FieldDescriptor::TYPE_MESSAGE, value_field->type());
68 return name_resolver->GetImmutableClassName(value_field->message_type());
69 }
70 } // namespace
71
MessageBuilderGenerator(const Descriptor * descriptor,Context * context)72 MessageBuilderGenerator::MessageBuilderGenerator(const Descriptor* descriptor,
73 Context* context)
74 : descriptor_(descriptor),
75 context_(context),
76 name_resolver_(context->GetNameResolver()),
77 field_generators_(descriptor, context_) {
78 GOOGLE_CHECK(HasDescriptorMethods(descriptor->file(), context->EnforceLite()))
79 << "Generator factory error: A non-lite message generator is used to "
80 "generate lite messages.";
81 }
82
~MessageBuilderGenerator()83 MessageBuilderGenerator::~MessageBuilderGenerator() {}
84
Generate(io::Printer * printer)85 void MessageBuilderGenerator::Generate(io::Printer* printer) {
86 WriteMessageDocComment(printer, descriptor_);
87 if (descriptor_->extension_range_count() > 0) {
88 printer->Print(
89 "public static final class Builder extends\n"
90 " com.google.protobuf.GeneratedMessage$ver$.ExtendableBuilder<\n"
91 " $classname$, Builder> implements\n"
92 " $extra_interfaces$\n"
93 " $classname$OrBuilder {\n",
94 "classname", name_resolver_->GetImmutableClassName(descriptor_),
95 "extra_interfaces", ExtraBuilderInterfaces(descriptor_), "ver",
96 GeneratedCodeVersionSuffix());
97 } else {
98 printer->Print(
99 "public static final class Builder extends\n"
100 " com.google.protobuf.GeneratedMessage$ver$.Builder<Builder> "
101 "implements\n"
102 " $extra_interfaces$\n"
103 " $classname$OrBuilder {\n",
104 "classname", name_resolver_->GetImmutableClassName(descriptor_),
105 "extra_interfaces", ExtraBuilderInterfaces(descriptor_), "ver",
106 GeneratedCodeVersionSuffix());
107 }
108 printer->Indent();
109
110 GenerateDescriptorMethods(printer);
111 GenerateCommonBuilderMethods(printer);
112
113 if (context_->HasGeneratedMethods(descriptor_)) {
114 GenerateIsInitialized(printer);
115 GenerateBuilderParsingMethods(printer);
116 }
117
118 // oneof
119 std::map<std::string, std::string> vars;
120 for (int i = 0; i < descriptor_->oneof_decl_count(); i++) {
121 vars["oneof_name"] =
122 context_->GetOneofGeneratorInfo(descriptor_->oneof_decl(i))->name;
123 vars["oneof_capitalized_name"] =
124 context_->GetOneofGeneratorInfo(descriptor_->oneof_decl(i))
125 ->capitalized_name;
126 vars["oneof_index"] = StrCat(descriptor_->oneof_decl(i)->index());
127 // oneofCase_ and oneof_
128 printer->Print(vars,
129 "private int $oneof_name$Case_ = 0;\n"
130 "private java.lang.Object $oneof_name$_;\n");
131 // oneofCase() and clearOneof()
132 printer->Print(vars,
133 "public $oneof_capitalized_name$Case\n"
134 " get$oneof_capitalized_name$Case() {\n"
135 " return $oneof_capitalized_name$Case.forNumber(\n"
136 " $oneof_name$Case_);\n"
137 "}\n"
138 "\n"
139 "public Builder clear$oneof_capitalized_name$() {\n"
140 " $oneof_name$Case_ = 0;\n"
141 " $oneof_name$_ = null;\n");
142 printer->Print(" onChanged();\n");
143 printer->Print(
144 " return this;\n"
145 "}\n"
146 "\n");
147 }
148
149 // Integers for bit fields.
150 int totalBits = 0;
151 for (int i = 0; i < descriptor_->field_count(); i++) {
152 totalBits +=
153 field_generators_.get(descriptor_->field(i)).GetNumBitsForBuilder();
154 }
155 int totalInts = (totalBits + 31) / 32;
156 for (int i = 0; i < totalInts; i++) {
157 printer->Print("private int $bit_field_name$;\n", "bit_field_name",
158 GetBitFieldName(i));
159 }
160
161 for (int i = 0; i < descriptor_->field_count(); i++) {
162 printer->Print("\n");
163 field_generators_.get(descriptor_->field(i))
164 .GenerateBuilderMembers(printer);
165 }
166
167 // Override methods declared in GeneratedMessage to return the concrete
168 // generated type so callsites won't depend on GeneratedMessage. This
169 // is needed to keep binary compatibility when we change generated code
170 // to subclass a different GeneratedMessage class (e.g., in v3.0.0 release
171 // we changed all generated code to subclass GeneratedMessageV3).
172 printer->Print(
173 "@java.lang.Override\n"
174 "public final Builder setUnknownFields(\n"
175 " final com.google.protobuf.UnknownFieldSet unknownFields) {\n"
176 " return super.setUnknownFields(unknownFields);\n"
177 "}\n"
178 "\n"
179 "@java.lang.Override\n"
180 "public final Builder mergeUnknownFields(\n"
181 " final com.google.protobuf.UnknownFieldSet unknownFields) {\n"
182 " return super.mergeUnknownFields(unknownFields);\n"
183 "}\n"
184 "\n");
185
186 printer->Print(
187 "\n"
188 "// @@protoc_insertion_point(builder_scope:$full_name$)\n",
189 "full_name", descriptor_->full_name());
190
191 printer->Outdent();
192 printer->Print("}\n");
193 }
194
195 // ===================================================================
196
GenerateDescriptorMethods(io::Printer * printer)197 void MessageBuilderGenerator::GenerateDescriptorMethods(io::Printer* printer) {
198 if (!descriptor_->options().no_standard_descriptor_accessor()) {
199 printer->Print(
200 "public static final com.google.protobuf.Descriptors.Descriptor\n"
201 " getDescriptor() {\n"
202 " return $fileclass$.internal_$identifier$_descriptor;\n"
203 "}\n"
204 "\n",
205 "fileclass", name_resolver_->GetImmutableClassName(descriptor_->file()),
206 "identifier", UniqueFileScopeIdentifier(descriptor_));
207 }
208 std::vector<const FieldDescriptor*> map_fields;
209 for (int i = 0; i < descriptor_->field_count(); i++) {
210 const FieldDescriptor* field = descriptor_->field(i);
211 if (GetJavaType(field) == JAVATYPE_MESSAGE &&
212 IsMapEntry(field->message_type())) {
213 map_fields.push_back(field);
214 }
215 }
216 if (!map_fields.empty()) {
217 printer->Print(
218 "@SuppressWarnings({\"rawtypes\"})\n"
219 "protected com.google.protobuf.MapField internalGetMapField(\n"
220 " int number) {\n"
221 " switch (number) {\n");
222 printer->Indent();
223 printer->Indent();
224 for (int i = 0; i < map_fields.size(); ++i) {
225 const FieldDescriptor* field = map_fields[i];
226 const FieldGeneratorInfo* info = context_->GetFieldGeneratorInfo(field);
227 printer->Print(
228 "case $number$:\n"
229 " return internalGet$capitalized_name$();\n",
230 "number", StrCat(field->number()), "capitalized_name",
231 info->capitalized_name);
232 }
233 printer->Print(
234 "default:\n"
235 " throw new RuntimeException(\n"
236 " \"Invalid map field number: \" + number);\n");
237 printer->Outdent();
238 printer->Outdent();
239 printer->Print(
240 " }\n"
241 "}\n");
242 printer->Print(
243 "@SuppressWarnings({\"rawtypes\"})\n"
244 "protected com.google.protobuf.MapField internalGetMutableMapField(\n"
245 " int number) {\n"
246 " switch (number) {\n");
247 printer->Indent();
248 printer->Indent();
249 for (int i = 0; i < map_fields.size(); ++i) {
250 const FieldDescriptor* field = map_fields[i];
251 const FieldGeneratorInfo* info = context_->GetFieldGeneratorInfo(field);
252 printer->Print(
253 "case $number$:\n"
254 " return internalGetMutable$capitalized_name$();\n",
255 "number", StrCat(field->number()), "capitalized_name",
256 info->capitalized_name);
257 }
258 printer->Print(
259 "default:\n"
260 " throw new RuntimeException(\n"
261 " \"Invalid map field number: \" + number);\n");
262 printer->Outdent();
263 printer->Outdent();
264 printer->Print(
265 " }\n"
266 "}\n");
267 }
268 printer->Print(
269 "@java.lang.Override\n"
270 "protected com.google.protobuf.GeneratedMessage$ver$.FieldAccessorTable\n"
271 " internalGetFieldAccessorTable() {\n"
272 " return $fileclass$.internal_$identifier$_fieldAccessorTable\n"
273 " .ensureFieldAccessorsInitialized(\n"
274 " $classname$.class, $classname$.Builder.class);\n"
275 "}\n"
276 "\n",
277 "classname", name_resolver_->GetImmutableClassName(descriptor_),
278 "fileclass", name_resolver_->GetImmutableClassName(descriptor_->file()),
279 "identifier", UniqueFileScopeIdentifier(descriptor_), "ver",
280 GeneratedCodeVersionSuffix());
281 }
282
283 // ===================================================================
284
GenerateCommonBuilderMethods(io::Printer * printer)285 void MessageBuilderGenerator::GenerateCommonBuilderMethods(
286 io::Printer* printer) {
287 printer->Print(
288 "// Construct using $classname$.newBuilder()\n"
289 "private Builder() {\n"
290 " maybeForceBuilderInitialization();\n"
291 "}\n"
292 "\n",
293 "classname", name_resolver_->GetImmutableClassName(descriptor_));
294
295 printer->Print(
296 "private Builder(\n"
297 " com.google.protobuf.GeneratedMessage$ver$.BuilderParent parent) {\n"
298 " super(parent);\n"
299 " maybeForceBuilderInitialization();\n"
300 "}\n",
301 "classname", name_resolver_->GetImmutableClassName(descriptor_), "ver",
302 GeneratedCodeVersionSuffix());
303
304 printer->Print(
305 "private void maybeForceBuilderInitialization() {\n"
306 " if (com.google.protobuf.GeneratedMessage$ver$\n"
307 " .alwaysUseFieldBuilders) {\n",
308 "ver", GeneratedCodeVersionSuffix());
309
310 printer->Indent();
311 printer->Indent();
312 for (int i = 0; i < descriptor_->field_count(); i++) {
313 if (!descriptor_->field(i)->containing_oneof()) {
314 field_generators_.get(descriptor_->field(i))
315 .GenerateFieldBuilderInitializationCode(printer);
316 }
317 }
318 printer->Outdent();
319 printer->Outdent();
320
321 printer->Print(
322 " }\n"
323 "}\n");
324
325 printer->Print(
326 "@java.lang.Override\n"
327 "public Builder clear() {\n"
328 " super.clear();\n");
329
330 printer->Indent();
331
332 for (int i = 0; i < descriptor_->field_count(); i++) {
333 if (!descriptor_->field(i)->containing_oneof()) {
334 field_generators_.get(descriptor_->field(i))
335 .GenerateBuilderClearCode(printer);
336 }
337 }
338
339 for (int i = 0; i < descriptor_->oneof_decl_count(); i++) {
340 printer->Print(
341 "$oneof_name$Case_ = 0;\n"
342 "$oneof_name$_ = null;\n",
343 "oneof_name",
344 context_->GetOneofGeneratorInfo(descriptor_->oneof_decl(i))->name);
345 }
346
347 printer->Outdent();
348
349 printer->Print(
350 " return this;\n"
351 "}\n"
352 "\n");
353
354 printer->Print(
355 "@java.lang.Override\n"
356 "public com.google.protobuf.Descriptors.Descriptor\n"
357 " getDescriptorForType() {\n"
358 " return $fileclass$.internal_$identifier$_descriptor;\n"
359 "}\n"
360 "\n",
361 "fileclass", name_resolver_->GetImmutableClassName(descriptor_->file()),
362 "identifier", UniqueFileScopeIdentifier(descriptor_));
363
364 // LITE runtime implements this in GeneratedMessageLite.
365 printer->Print(
366 "@java.lang.Override\n"
367 "public $classname$ getDefaultInstanceForType() {\n"
368 " return $classname$.getDefaultInstance();\n"
369 "}\n"
370 "\n",
371 "classname", name_resolver_->GetImmutableClassName(descriptor_));
372
373 printer->Print(
374 "@java.lang.Override\n"
375 "public $classname$ build() {\n"
376 " $classname$ result = buildPartial();\n"
377 " if (!result.isInitialized()) {\n"
378 " throw newUninitializedMessageException(result);\n"
379 " }\n"
380 " return result;\n"
381 "}\n"
382 "\n",
383 "classname", name_resolver_->GetImmutableClassName(descriptor_));
384
385 printer->Print(
386 "@java.lang.Override\n"
387 "public $classname$ buildPartial() {\n"
388 " $classname$ result = new $classname$(this);\n",
389 "classname", name_resolver_->GetImmutableClassName(descriptor_));
390
391 printer->Indent();
392
393 int totalBuilderBits = 0;
394 int totalMessageBits = 0;
395 for (int i = 0; i < descriptor_->field_count(); i++) {
396 const ImmutableFieldGenerator& field =
397 field_generators_.get(descriptor_->field(i));
398 totalBuilderBits += field.GetNumBitsForBuilder();
399 totalMessageBits += field.GetNumBitsForMessage();
400 }
401 int totalBuilderInts = (totalBuilderBits + 31) / 32;
402 int totalMessageInts = (totalMessageBits + 31) / 32;
403
404 // Local vars for from and to bit fields to avoid accessing the builder and
405 // message over and over for these fields. Seems to provide a slight
406 // perforamance improvement in micro benchmark and this is also what proto1
407 // code does.
408 for (int i = 0; i < totalBuilderInts; i++) {
409 printer->Print("int from_$bit_field_name$ = $bit_field_name$;\n",
410 "bit_field_name", GetBitFieldName(i));
411 }
412 for (int i = 0; i < totalMessageInts; i++) {
413 printer->Print("int to_$bit_field_name$ = 0;\n", "bit_field_name",
414 GetBitFieldName(i));
415 }
416
417 // Output generation code for each field.
418 for (int i = 0; i < descriptor_->field_count(); i++) {
419 field_generators_.get(descriptor_->field(i)).GenerateBuildingCode(printer);
420 }
421
422 // Copy the bit field results to the generated message
423 for (int i = 0; i < totalMessageInts; i++) {
424 printer->Print("result.$bit_field_name$ = to_$bit_field_name$;\n",
425 "bit_field_name", GetBitFieldName(i));
426 }
427
428 for (int i = 0; i < descriptor_->oneof_decl_count(); i++) {
429 printer->Print(
430 "result.$oneof_name$Case_ = $oneof_name$Case_;\n", "oneof_name",
431 context_->GetOneofGeneratorInfo(descriptor_->oneof_decl(i))->name);
432 }
433
434 printer->Outdent();
435
436 printer->Print(" onBuilt();\n");
437
438 printer->Print(
439 " return result;\n"
440 "}\n"
441 "\n",
442 "classname", name_resolver_->GetImmutableClassName(descriptor_));
443
444 // Override methods declared in GeneratedMessage to return the concrete
445 // generated type so callsites won't depend on GeneratedMessage. This
446 // is needed to keep binary compatibility when we change generated code
447 // to subclass a different GeneratedMessage class (e.g., in v3.0.0 release
448 // we changed all generated code to subclass GeneratedMessageV3).
449 printer->Print(
450 "@java.lang.Override\n"
451 "public Builder clone() {\n"
452 " return super.clone();\n"
453 "}\n"
454 "@java.lang.Override\n"
455 "public Builder setField(\n"
456 " com.google.protobuf.Descriptors.FieldDescriptor field,\n"
457 " java.lang.Object value) {\n"
458 " return super.setField(field, value);\n"
459 "}\n"
460 "@java.lang.Override\n"
461 "public Builder clearField(\n"
462 " com.google.protobuf.Descriptors.FieldDescriptor field) {\n"
463 " return super.clearField(field);\n"
464 "}\n"
465 "@java.lang.Override\n"
466 "public Builder clearOneof(\n"
467 " com.google.protobuf.Descriptors.OneofDescriptor oneof) {\n"
468 " return super.clearOneof(oneof);\n"
469 "}\n"
470 "@java.lang.Override\n"
471 "public Builder setRepeatedField(\n"
472 " com.google.protobuf.Descriptors.FieldDescriptor field,\n"
473 " int index, java.lang.Object value) {\n"
474 " return super.setRepeatedField(field, index, value);\n"
475 "}\n"
476 "@java.lang.Override\n"
477 "public Builder addRepeatedField(\n"
478 " com.google.protobuf.Descriptors.FieldDescriptor field,\n"
479 " java.lang.Object value) {\n"
480 " return super.addRepeatedField(field, value);\n"
481 "}\n");
482
483 if (descriptor_->extension_range_count() > 0) {
484 printer->Print(
485 "@java.lang.Override\n"
486 "public <Type> Builder setExtension(\n"
487 " com.google.protobuf.GeneratedMessage.GeneratedExtension<\n"
488 " $classname$, Type> extension,\n"
489 " Type value) {\n"
490 " return super.setExtension(extension, value);\n"
491 "}\n"
492 "@java.lang.Override\n"
493 "public <Type> Builder setExtension(\n"
494 " com.google.protobuf.GeneratedMessage.GeneratedExtension<\n"
495 " $classname$, java.util.List<Type>> extension,\n"
496 " int index, Type value) {\n"
497 " return super.setExtension(extension, index, value);\n"
498 "}\n"
499 "@java.lang.Override\n"
500 "public <Type> Builder addExtension(\n"
501 " com.google.protobuf.GeneratedMessage.GeneratedExtension<\n"
502 " $classname$, java.util.List<Type>> extension,\n"
503 " Type value) {\n"
504 " return super.addExtension(extension, value);\n"
505 "}\n"
506 "@java.lang.Override\n"
507 "public <Type> Builder clearExtension(\n"
508 " com.google.protobuf.GeneratedMessage.GeneratedExtension<\n"
509 " $classname$, ?> extension) {\n"
510 " return super.clearExtension(extension);\n"
511 "}\n",
512 "classname", name_resolver_->GetImmutableClassName(descriptor_));
513 }
514
515 // -----------------------------------------------------------------
516
517 if (context_->HasGeneratedMethods(descriptor_)) {
518 printer->Print(
519 "@java.lang.Override\n"
520 "public Builder mergeFrom(com.google.protobuf.Message other) {\n"
521 " if (other instanceof $classname$) {\n"
522 " return mergeFrom(($classname$)other);\n"
523 " } else {\n"
524 " super.mergeFrom(other);\n"
525 " return this;\n"
526 " }\n"
527 "}\n"
528 "\n",
529 "classname", name_resolver_->GetImmutableClassName(descriptor_));
530
531 printer->Print(
532 "public Builder mergeFrom($classname$ other) {\n"
533 // Optimization: If other is the default instance, we know none of its
534 // fields are set so we can skip the merge.
535 " if (other == $classname$.getDefaultInstance()) return this;\n",
536 "classname", name_resolver_->GetImmutableClassName(descriptor_));
537 printer->Indent();
538
539 for (int i = 0; i < descriptor_->field_count(); i++) {
540 if (!descriptor_->field(i)->containing_oneof()) {
541 field_generators_.get(descriptor_->field(i))
542 .GenerateMergingCode(printer);
543 }
544 }
545
546 // Merge oneof fields.
547 for (int i = 0; i < descriptor_->oneof_decl_count(); ++i) {
548 printer->Print("switch (other.get$oneof_capitalized_name$Case()) {\n",
549 "oneof_capitalized_name",
550 context_->GetOneofGeneratorInfo(descriptor_->oneof_decl(i))
551 ->capitalized_name);
552 printer->Indent();
553 for (int j = 0; j < descriptor_->oneof_decl(i)->field_count(); j++) {
554 const FieldDescriptor* field = descriptor_->oneof_decl(i)->field(j);
555 printer->Print("case $field_name$: {\n", "field_name",
556 ToUpper(field->name()));
557 printer->Indent();
558 field_generators_.get(field).GenerateMergingCode(printer);
559 printer->Print("break;\n");
560 printer->Outdent();
561 printer->Print("}\n");
562 }
563 printer->Print(
564 "case $cap_oneof_name$_NOT_SET: {\n"
565 " break;\n"
566 "}\n",
567 "cap_oneof_name",
568 ToUpper(
569 context_->GetOneofGeneratorInfo(descriptor_->oneof_decl(i))
570 ->name));
571 printer->Outdent();
572 printer->Print("}\n");
573 }
574
575 printer->Outdent();
576
577 // if message type has extensions
578 if (descriptor_->extension_range_count() > 0) {
579 printer->Print(" this.mergeExtensionFields(other);\n");
580 }
581
582 printer->Print(" this.mergeUnknownFields(other.unknownFields);\n");
583
584 printer->Print(" onChanged();\n");
585
586 printer->Print(
587 " return this;\n"
588 "}\n"
589 "\n");
590 }
591 }
592
593 // ===================================================================
594
GenerateBuilderParsingMethods(io::Printer * printer)595 void MessageBuilderGenerator::GenerateBuilderParsingMethods(
596 io::Printer* printer) {
597 printer->Print(
598 "@java.lang.Override\n"
599 "public Builder mergeFrom(\n"
600 " com.google.protobuf.CodedInputStream input,\n"
601 " com.google.protobuf.ExtensionRegistryLite extensionRegistry)\n"
602 " throws java.io.IOException {\n"
603 " $classname$ parsedMessage = null;\n"
604 " try {\n"
605 " parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);\n"
606 " } catch (com.google.protobuf.InvalidProtocolBufferException e) {\n"
607 " parsedMessage = ($classname$) e.getUnfinishedMessage();\n"
608 " throw e.unwrapIOException();\n"
609 " } finally {\n"
610 " if (parsedMessage != null) {\n"
611 " mergeFrom(parsedMessage);\n"
612 " }\n"
613 " }\n"
614 " return this;\n"
615 "}\n",
616 "classname", name_resolver_->GetImmutableClassName(descriptor_));
617 }
618
619 // ===================================================================
620
GenerateIsInitialized(io::Printer * printer)621 void MessageBuilderGenerator::GenerateIsInitialized(io::Printer* printer) {
622 printer->Print(
623 "@java.lang.Override\n"
624 "public final boolean isInitialized() {\n");
625 printer->Indent();
626
627 // Check that all required fields in this message are set.
628 // TODO(kenton): We can optimize this when we switch to putting all the
629 // "has" fields into a single bitfield.
630 for (int i = 0; i < descriptor_->field_count(); i++) {
631 const FieldDescriptor* field = descriptor_->field(i);
632 const FieldGeneratorInfo* info = context_->GetFieldGeneratorInfo(field);
633
634 if (field->is_required()) {
635 printer->Print(
636 "if (!has$name$()) {\n"
637 " return false;\n"
638 "}\n",
639 "name", info->capitalized_name);
640 }
641 }
642
643 // Now check that all embedded messages are initialized.
644 for (int i = 0; i < descriptor_->field_count(); i++) {
645 const FieldDescriptor* field = descriptor_->field(i);
646 const FieldGeneratorInfo* info = context_->GetFieldGeneratorInfo(field);
647 if (GetJavaType(field) == JAVATYPE_MESSAGE &&
648 HasRequiredFields(field->message_type())) {
649 switch (field->label()) {
650 case FieldDescriptor::LABEL_REQUIRED:
651 printer->Print(
652 "if (!get$name$().isInitialized()) {\n"
653 " return false;\n"
654 "}\n",
655 "type",
656 name_resolver_->GetImmutableClassName(field->message_type()),
657 "name", info->capitalized_name);
658 break;
659 case FieldDescriptor::LABEL_OPTIONAL:
660 if (!SupportFieldPresence(descriptor_->file()) &&
661 field->containing_oneof() != NULL) {
662 const OneofDescriptor* oneof = field->containing_oneof();
663 const OneofGeneratorInfo* oneof_info =
664 context_->GetOneofGeneratorInfo(oneof);
665 printer->Print("if ($oneof_name$Case_ == $field_number$) {\n",
666 "oneof_name", oneof_info->name, "field_number",
667 StrCat(field->number()));
668 } else {
669 printer->Print("if (has$name$()) {\n", "name",
670 info->capitalized_name);
671 }
672 printer->Print(
673 " if (!get$name$().isInitialized()) {\n"
674 " return false;\n"
675 " }\n"
676 "}\n",
677 "name", info->capitalized_name);
678 break;
679 case FieldDescriptor::LABEL_REPEATED:
680 if (IsMapEntry(field->message_type())) {
681 printer->Print(
682 "for ($type$ item : get$name$Map().values()) {\n"
683 " if (!item.isInitialized()) {\n"
684 " return false;\n"
685 " }\n"
686 "}\n",
687 "type",
688 MapValueImmutableClassdName(field->message_type(),
689 name_resolver_),
690 "name", info->capitalized_name);
691 } else {
692 printer->Print(
693 "for (int i = 0; i < get$name$Count(); i++) {\n"
694 " if (!get$name$(i).isInitialized()) {\n"
695 " return false;\n"
696 " }\n"
697 "}\n",
698 "type",
699 name_resolver_->GetImmutableClassName(field->message_type()),
700 "name", info->capitalized_name);
701 }
702 break;
703 }
704 }
705 }
706
707 if (descriptor_->extension_range_count() > 0) {
708 printer->Print(
709 "if (!extensionsAreInitialized()) {\n"
710 " return false;\n"
711 "}\n");
712 }
713
714 printer->Outdent();
715
716 printer->Print(
717 " return true;\n"
718 "}\n"
719 "\n");
720 }
721
722 // ===================================================================
723
724 } // namespace java
725 } // namespace compiler
726 } // namespace protobuf
727 } // namespace google
728