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: kenton (at) google.com (Kenton Varda) 32 // Based on original Protocol Buffers design by 33 // Sanjay Ghemawat, Jeff Dean, and others. 34 35 #include <google/protobuf/compiler/java/java_message.h> 36 37 #include <algorithm> 38 #include <google/protobuf/stubs/hash.h> 39 #include <map> 40 #include <memory> 41 #include <vector> 42 43 #include <google/protobuf/compiler/java/java_context.h> 44 #include <google/protobuf/compiler/java/java_doc_comment.h> 45 #include <google/protobuf/compiler/java/java_enum.h> 46 #include <google/protobuf/compiler/java/java_extension.h> 47 #include <google/protobuf/compiler/java/java_generator_factory.h> 48 #include <google/protobuf/compiler/java/java_helpers.h> 49 #include <google/protobuf/compiler/java/java_name_resolver.h> 50 #include <google/protobuf/io/coded_stream.h> 51 #include <google/protobuf/io/printer.h> 52 #include <google/protobuf/descriptor.pb.h> 53 #include <google/protobuf/wire_format.h> 54 #include <google/protobuf/stubs/strutil.h> 55 #include <google/protobuf/stubs/substitute.h> 56 57 namespace google { 58 namespace protobuf { 59 namespace compiler { 60 namespace java { 61 62 using internal::WireFormat; 63 using internal::WireFormatLite; 64 65 namespace { 66 bool GenerateHasBits(const Descriptor* descriptor) { 67 return SupportFieldPresence(descriptor->file()) || 68 HasRepeatedFields(descriptor); 69 } 70 } // namespace 71 72 // =================================================================== 73 74 MessageGenerator::MessageGenerator(const Descriptor* descriptor) 75 : descriptor_(descriptor) {} 76 77 MessageGenerator::~MessageGenerator() {} 78 79 // =================================================================== 80 // TODO(api): Move this class to a separate immutable_message.cc file. 81 ImmutableMessageGenerator::ImmutableMessageGenerator( 82 const Descriptor* descriptor, Context* context) 83 : MessageGenerator(descriptor), context_(context), 84 name_resolver_(context->GetNameResolver()), 85 field_generators_(descriptor, context_) { 86 } 87 88 ImmutableMessageGenerator::~ImmutableMessageGenerator() {} 89 90 void ImmutableMessageGenerator::GenerateStaticVariables(io::Printer* printer) { 91 if (HasDescriptorMethods(descriptor_)) { 92 // Because descriptor.proto (com.google.protobuf.DescriptorProtos) is 93 // used in the construction of descriptors, we have a tricky bootstrapping 94 // problem. To help control static initialization order, we make sure all 95 // descriptors and other static data that depends on them are members of 96 // the outermost class in the file. This way, they will be initialized in 97 // a deterministic order. 98 99 map<string, string> vars; 100 vars["identifier"] = UniqueFileScopeIdentifier(descriptor_); 101 vars["index"] = SimpleItoa(descriptor_->index()); 102 vars["classname"] = name_resolver_->GetImmutableClassName(descriptor_); 103 if (descriptor_->containing_type() != NULL) { 104 vars["parent"] = UniqueFileScopeIdentifier( 105 descriptor_->containing_type()); 106 } 107 if (MultipleJavaFiles(descriptor_->file(), /* immutable = */ true)) { 108 // We can only make these package-private since the classes that use them 109 // are in separate files. 110 vars["private"] = ""; 111 } else { 112 vars["private"] = "private "; 113 } 114 115 // The descriptor for this type. 116 printer->Print(vars, 117 "$private$static final com.google.protobuf.Descriptors.Descriptor\n" 118 " internal_$identifier$_descriptor;\n"); 119 120 // And the FieldAccessorTable. 121 GenerateFieldAccessorTable(printer); 122 } 123 124 // Generate static members for all nested types. 125 for (int i = 0; i < descriptor_->nested_type_count(); i++) { 126 // TODO(kenton): Reuse MessageGenerator objects? 127 ImmutableMessageGenerator(descriptor_->nested_type(i), context_) 128 .GenerateStaticVariables(printer); 129 } 130 } 131 132 void ImmutableMessageGenerator::GenerateStaticVariableInitializers( 133 io::Printer* printer) { 134 if (HasDescriptorMethods(descriptor_)) { 135 map<string, string> vars; 136 vars["identifier"] = UniqueFileScopeIdentifier(descriptor_); 137 vars["index"] = SimpleItoa(descriptor_->index()); 138 vars["classname"] = name_resolver_->GetImmutableClassName(descriptor_); 139 if (descriptor_->containing_type() != NULL) { 140 vars["parent"] = UniqueFileScopeIdentifier( 141 descriptor_->containing_type()); 142 } 143 144 // The descriptor for this type. 145 if (descriptor_->containing_type() == NULL) { 146 printer->Print(vars, 147 "internal_$identifier$_descriptor =\n" 148 " getDescriptor().getMessageTypes().get($index$);\n"); 149 } else { 150 printer->Print(vars, 151 "internal_$identifier$_descriptor =\n" 152 " internal_$parent$_descriptor.getNestedTypes().get($index$);\n"); 153 } 154 155 // And the FieldAccessorTable. 156 GenerateFieldAccessorTableInitializer(printer); 157 } 158 159 // Generate static member initializers for all nested types. 160 for (int i = 0; i < descriptor_->nested_type_count(); i++) { 161 // TODO(kenton): Reuse MessageGenerator objects? 162 ImmutableMessageGenerator(descriptor_->nested_type(i), context_) 163 .GenerateStaticVariableInitializers(printer); 164 } 165 } 166 167 void ImmutableMessageGenerator:: 168 GenerateFieldAccessorTable(io::Printer* printer) { 169 map<string, string> vars; 170 vars["identifier"] = UniqueFileScopeIdentifier(descriptor_); 171 if (MultipleJavaFiles(descriptor_->file(), /* immutable = */ true)) { 172 // We can only make these package-private since the classes that use them 173 // are in separate files. 174 vars["private"] = ""; 175 } else { 176 vars["private"] = "private "; 177 } 178 printer->Print(vars, 179 "$private$static\n" 180 " com.google.protobuf.GeneratedMessage.FieldAccessorTable\n" 181 " internal_$identifier$_fieldAccessorTable;\n"); 182 } 183 184 void ImmutableMessageGenerator:: 185 GenerateFieldAccessorTableInitializer(io::Printer* printer) { 186 printer->Print( 187 "internal_$identifier$_fieldAccessorTable = new\n" 188 " com.google.protobuf.GeneratedMessage.FieldAccessorTable(\n" 189 " internal_$identifier$_descriptor,\n" 190 " new java.lang.String[] { ", 191 "identifier", 192 UniqueFileScopeIdentifier(descriptor_)); 193 for (int i = 0; i < descriptor_->field_count(); i++) { 194 const FieldDescriptor* field = descriptor_->field(i); 195 const FieldGeneratorInfo* info = context_->GetFieldGeneratorInfo(field); 196 printer->Print( 197 "\"$field_name$\", ", 198 "field_name", info->capitalized_name); 199 } 200 for (int i = 0; i < descriptor_->oneof_decl_count(); i++) { 201 const OneofDescriptor* oneof = descriptor_->oneof_decl(i); 202 const OneofGeneratorInfo* info = context_->GetOneofGeneratorInfo(oneof); 203 printer->Print( 204 "\"$oneof_name$\", ", 205 "oneof_name", info->capitalized_name); 206 } 207 printer->Print("});\n"); 208 } 209 210 // =================================================================== 211 212 void ImmutableMessageGenerator::GenerateInterface(io::Printer* printer) { 213 if (descriptor_->extension_range_count() > 0) { 214 if (HasDescriptorMethods(descriptor_)) { 215 printer->Print( 216 "public interface $classname$OrBuilder extends\n" 217 " $extra_interfaces$\n" 218 " com.google.protobuf.GeneratedMessage.\n" 219 " ExtendableMessageOrBuilder<$classname$> {\n", 220 "extra_interfaces", ExtraMessageOrBuilderInterfaces(descriptor_), 221 "classname", descriptor_->name()); 222 } else { 223 printer->Print( 224 "public interface $classname$OrBuilder extends \n" 225 " $extra_interfaces$\n" 226 " com.google.protobuf.GeneratedMessageLite.\n" 227 " ExtendableMessageOrBuilder<$classname$> {\n", 228 "extra_interfaces", ExtraMessageOrBuilderInterfaces(descriptor_), 229 "classname", descriptor_->name()); 230 } 231 } else { 232 if (HasDescriptorMethods(descriptor_)) { 233 printer->Print( 234 "public interface $classname$OrBuilder extends\n" 235 " $extra_interfaces$\n" 236 " com.google.protobuf.MessageOrBuilder {\n", 237 "extra_interfaces", ExtraMessageOrBuilderInterfaces(descriptor_), 238 "classname", descriptor_->name()); 239 } else { 240 printer->Print( 241 "public interface $classname$OrBuilder extends\n" 242 " $extra_interfaces$\n" 243 " com.google.protobuf.MessageLiteOrBuilder {\n", 244 "extra_interfaces", ExtraMessageOrBuilderInterfaces(descriptor_), 245 "classname", descriptor_->name()); 246 } 247 } 248 249 printer->Indent(); 250 for (int i = 0; i < descriptor_->field_count(); i++) { 251 printer->Print("\n"); 252 field_generators_.get(descriptor_->field(i)) 253 .GenerateInterfaceMembers(printer); 254 } 255 printer->Outdent(); 256 257 printer->Print("}\n"); 258 } 259 260 // =================================================================== 261 262 void ImmutableMessageGenerator::Generate(io::Printer* printer) { 263 bool is_own_file = 264 descriptor_->containing_type() == NULL && 265 MultipleJavaFiles(descriptor_->file(), /* immutable = */ true); 266 267 WriteMessageDocComment(printer, descriptor_); 268 269 // The builder_type stores the super type name of the nested Builder class. 270 string builder_type; 271 if (descriptor_->extension_range_count() > 0) { 272 if (HasDescriptorMethods(descriptor_)) { 273 printer->Print( 274 "public$static$final class $classname$ extends\n" 275 " com.google.protobuf.GeneratedMessage.ExtendableMessage<\n" 276 " $classname$> implements\n" 277 " $extra_interfaces$\n" 278 " $classname$OrBuilder {\n", 279 "static", is_own_file ? " " : " static ", 280 "classname", descriptor_->name(), 281 "extra_interfaces", ExtraMessageInterfaces(descriptor_)); 282 builder_type = strings::Substitute( 283 "com.google.protobuf.GeneratedMessage.ExtendableBuilder<$0, ?>", 284 name_resolver_->GetImmutableClassName(descriptor_)); 285 } else { 286 printer->Print( 287 "public$static$final class $classname$ extends\n" 288 " com.google.protobuf.GeneratedMessageLite.ExtendableMessage<\n" 289 " $classname$> implements\n" 290 " $extra_interfaces$\n" 291 " $classname$OrBuilder {\n", 292 "static", is_own_file ? " " : " static ", 293 "classname", descriptor_->name(), 294 "extra_interfaces", ExtraMessageInterfaces(descriptor_)); 295 builder_type = strings::Substitute( 296 "com.google.protobuf.GeneratedMessageLite.ExtendableBuilder<$0, ?>", 297 name_resolver_->GetImmutableClassName(descriptor_)); 298 } 299 } else { 300 if (HasDescriptorMethods(descriptor_)) { 301 printer->Print( 302 "public$static$final class $classname$ extends\n" 303 " com.google.protobuf.GeneratedMessage implements\n" 304 " $extra_interfaces$\n" 305 " $classname$OrBuilder {\n", 306 "static", is_own_file ? " " : " static ", 307 "classname", descriptor_->name(), 308 "extra_interfaces", ExtraMessageInterfaces(descriptor_)); 309 builder_type = "com.google.protobuf.GeneratedMessage.Builder<?>"; 310 } else { 311 printer->Print( 312 "public$static$final class $classname$ extends\n" 313 " com.google.protobuf.GeneratedMessageLite implements\n" 314 " $extra_interfaces$\n" 315 " $classname$OrBuilder {\n", 316 "static", is_own_file ? " " : " static ", 317 "classname", descriptor_->name(), 318 "extra_interfaces", ExtraMessageInterfaces(descriptor_)); 319 builder_type = "com.google.protobuf.GeneratedMessageLite.Builder"; 320 } 321 } 322 printer->Indent(); 323 // Using builder_type, instead of Builder, prevents the Builder class from 324 // being loaded into PermGen space when the default instance is created. 325 // This optimizes the PermGen space usage for clients that do not modify 326 // messages. 327 printer->Print( 328 "// Use $classname$.newBuilder() to construct.\n" 329 "private $classname$($buildertype$ builder) {\n" 330 " super(builder);\n" 331 "$set_unknown_fields$\n" 332 "}\n", 333 "classname", descriptor_->name(), 334 "buildertype", builder_type, 335 "set_unknown_fields", 336 " this.unknownFields = builder.getUnknownFields();"); 337 printer->Print( 338 // Used when constructing the default instance, which cannot be initialized 339 // immediately because it may cyclically refer to other default instances. 340 "private $classname$(boolean noInit) {$set_default_unknown_fields$}\n" 341 "\n" 342 "private static final $classname$ defaultInstance;\n" 343 "public static $classname$ getDefaultInstance() {\n" 344 " return defaultInstance;\n" 345 "}\n" 346 "\n" 347 "public $classname$ getDefaultInstanceForType() {\n" 348 " return defaultInstance;\n" 349 "}\n" 350 "\n", 351 "classname", descriptor_->name(), 352 "set_default_unknown_fields", UseUnknownFieldSet(descriptor_) 353 ? " this.unknownFields =" 354 " com.google.protobuf.UnknownFieldSet.getDefaultInstance(); " 355 : " this.unknownFields = com.google.protobuf.ByteString.EMPTY;"); 356 357 if (UseUnknownFieldSet(descriptor_)) { 358 printer->Print( 359 "private final com.google.protobuf.UnknownFieldSet unknownFields;\n" 360 "" 361 "@java.lang.Override\n" 362 "public final com.google.protobuf.UnknownFieldSet\n" 363 " getUnknownFields() {\n" 364 " return this.unknownFields;\n" 365 "}\n"); 366 } else { 367 printer->Print( 368 "private final com.google.protobuf.ByteString unknownFields;\n"); 369 } 370 371 if (HasGeneratedMethods(descriptor_)) { 372 GenerateParsingConstructor(printer); 373 } 374 375 GenerateDescriptorMethods(printer); 376 GenerateParser(printer); 377 378 // Nested types 379 for (int i = 0; i < descriptor_->enum_type_count(); i++) { 380 EnumGenerator(descriptor_->enum_type(i), true, context_) 381 .Generate(printer); 382 } 383 384 for (int i = 0; i < descriptor_->nested_type_count(); i++) { 385 ImmutableMessageGenerator messageGenerator( 386 descriptor_->nested_type(i), context_); 387 messageGenerator.GenerateInterface(printer); 388 messageGenerator.Generate(printer); 389 } 390 391 if (GenerateHasBits(descriptor_)) { 392 // Integers for bit fields. 393 int totalBits = 0; 394 for (int i = 0; i < descriptor_->field_count(); i++) { 395 totalBits += field_generators_.get(descriptor_->field(i)) 396 .GetNumBitsForMessage(); 397 } 398 int totalInts = (totalBits + 31) / 32; 399 for (int i = 0; i < totalInts; i++) { 400 printer->Print("private int $bit_field_name$;\n", 401 "bit_field_name", GetBitFieldName(i)); 402 } 403 } 404 405 // oneof 406 map<string, string> vars; 407 for (int i = 0; i < descriptor_->oneof_decl_count(); i++) { 408 vars["oneof_name"] = context_->GetOneofGeneratorInfo( 409 descriptor_->oneof_decl(i))->name; 410 vars["oneof_capitalized_name"] = context_->GetOneofGeneratorInfo( 411 descriptor_->oneof_decl(i))->capitalized_name; 412 vars["oneof_index"] = SimpleItoa(descriptor_->oneof_decl(i)->index()); 413 // oneofCase_ and oneof_ 414 printer->Print(vars, 415 "private int $oneof_name$Case_ = 0;\n" 416 "private java.lang.Object $oneof_name$_;\n"); 417 // OneofCase enum 418 printer->Print(vars, 419 "public enum $oneof_capitalized_name$Case\n" 420 " implements com.google.protobuf.Internal.EnumLite {\n"); 421 printer->Indent(); 422 for (int j = 0; j < descriptor_->oneof_decl(i)->field_count(); j++) { 423 const FieldDescriptor* field = descriptor_->oneof_decl(i)->field(j); 424 printer->Print( 425 "$field_name$($field_number$),\n", 426 "field_name", 427 ToUpper(field->name()), 428 "field_number", 429 SimpleItoa(field->number())); 430 } 431 printer->Print( 432 "$cap_oneof_name$_NOT_SET(0);\n", 433 "cap_oneof_name", 434 ToUpper(vars["oneof_name"])); 435 printer->Print(vars, 436 "private int value = 0;\n" 437 "private $oneof_capitalized_name$Case(int value) {\n" 438 " this.value = value;\n" 439 "}\n"); 440 printer->Print(vars, 441 "public static $oneof_capitalized_name$Case valueOf(int value) {\n" 442 " switch (value) {\n"); 443 for (int j = 0; j < descriptor_->oneof_decl(i)->field_count(); j++) { 444 const FieldDescriptor* field = descriptor_->oneof_decl(i)->field(j); 445 printer->Print( 446 " case $field_number$: return $field_name$;\n", 447 "field_number", 448 SimpleItoa(field->number()), 449 "field_name", 450 ToUpper(field->name())); 451 } 452 printer->Print( 453 " case 0: return $cap_oneof_name$_NOT_SET;\n" 454 " default: throw new java.lang.IllegalArgumentException(\n" 455 " \"Value is undefined for this oneof enum.\");\n" 456 " }\n" 457 "}\n" 458 "public int getNumber() {\n" 459 " return this.value;\n" 460 "}\n", 461 "cap_oneof_name", ToUpper(vars["oneof_name"])); 462 printer->Outdent(); 463 printer->Print("};\n\n"); 464 // oneofCase() 465 printer->Print(vars, 466 "public $oneof_capitalized_name$Case\n" 467 "get$oneof_capitalized_name$Case() {\n" 468 " return $oneof_capitalized_name$Case.valueOf(\n" 469 " $oneof_name$Case_);\n" 470 "}\n" 471 "\n"); 472 } 473 474 // Fields 475 for (int i = 0; i < descriptor_->field_count(); i++) { 476 printer->Print("public static final int $constant_name$ = $number$;\n", 477 "constant_name", FieldConstantName(descriptor_->field(i)), 478 "number", SimpleItoa(descriptor_->field(i)->number())); 479 field_generators_.get(descriptor_->field(i)).GenerateMembers(printer); 480 printer->Print("\n"); 481 } 482 483 // Called by the constructor, except in the case of the default instance, 484 // in which case this is called by static init code later on. 485 printer->Print("private void initFields() {\n"); 486 printer->Indent(); 487 for (int i = 0; i < descriptor_->field_count(); i++) { 488 if (!descriptor_->field(i)->containing_oneof()) { 489 field_generators_.get(descriptor_->field(i)) 490 .GenerateInitializationCode(printer); 491 } 492 } 493 494 printer->Outdent(); 495 printer->Print("}\n"); 496 497 if (HasGeneratedMethods(descriptor_)) { 498 GenerateIsInitialized(printer, MEMOIZE); 499 GenerateMessageSerializationMethods(printer); 500 } 501 502 if (HasEqualsAndHashCode(descriptor_)) { 503 GenerateEqualsAndHashCode(printer); 504 } 505 506 507 GenerateParseFromMethods(printer); 508 GenerateBuilder(printer); 509 510 // Carefully initialize the default instance in such a way that it doesn't 511 // conflict with other initialization. 512 printer->Print( 513 "\n" 514 "static {\n" 515 " defaultInstance = new $classname$(true);\n" 516 " defaultInstance.initFields();\n" 517 "}\n" 518 "\n" 519 "// @@protoc_insertion_point(class_scope:$full_name$)\n", 520 "classname", descriptor_->name(), 521 "full_name", descriptor_->full_name()); 522 523 // Extensions must be declared after the defaultInstance is initialized 524 // because the defaultInstance is used by the extension to lazily retrieve 525 // the outer class's FileDescriptor. 526 for (int i = 0; i < descriptor_->extension_count(); i++) { 527 ImmutableExtensionGenerator(descriptor_->extension(i), context_) 528 .Generate(printer); 529 } 530 531 printer->Outdent(); 532 printer->Print("}\n\n"); 533 } 534 535 536 // =================================================================== 537 538 void ImmutableMessageGenerator:: 539 GenerateMessageSerializationMethods(io::Printer* printer) { 540 scoped_array<const FieldDescriptor*> sorted_fields( 541 SortFieldsByNumber(descriptor_)); 542 543 vector<const Descriptor::ExtensionRange*> sorted_extensions; 544 for (int i = 0; i < descriptor_->extension_range_count(); ++i) { 545 sorted_extensions.push_back(descriptor_->extension_range(i)); 546 } 547 sort(sorted_extensions.begin(), sorted_extensions.end(), 548 ExtensionRangeOrdering()); 549 550 printer->Print( 551 "public void writeTo(com.google.protobuf.CodedOutputStream output)\n" 552 " throws java.io.IOException {\n"); 553 printer->Indent(); 554 // writeTo(CodedOutputStream output) might be invoked without 555 // getSerializedSize() ever being called, but we need the memoized 556 // sizes in case this message has packed fields. Rather than emit checks for 557 // each packed field, just call getSerializedSize() up front for all messages. 558 // In most cases, getSerializedSize() will have already been called anyway by 559 // one of the wrapper writeTo() methods, making this call cheap. 560 printer->Print( 561 "getSerializedSize();\n"); 562 563 if (descriptor_->extension_range_count() > 0) { 564 if (descriptor_->options().message_set_wire_format()) { 565 printer->Print( 566 "com.google.protobuf.GeneratedMessage$lite$\n" 567 " .ExtendableMessage<$classname$>.ExtensionWriter extensionWriter =\n" 568 " newMessageSetExtensionWriter();\n", 569 "lite", HasDescriptorMethods(descriptor_) ? "" : "Lite", 570 "classname", name_resolver_->GetImmutableClassName(descriptor_)); 571 } else { 572 printer->Print( 573 "com.google.protobuf.GeneratedMessage$lite$\n" 574 " .ExtendableMessage<$classname$>.ExtensionWriter extensionWriter =\n" 575 " newExtensionWriter();\n", 576 "lite", HasDescriptorMethods(descriptor_) ? "" : "Lite", 577 "classname", name_resolver_->GetImmutableClassName(descriptor_)); 578 } 579 } 580 581 // Merge the fields and the extension ranges, both sorted by field number. 582 for (int i = 0, j = 0; 583 i < descriptor_->field_count() || j < sorted_extensions.size(); 584 ) { 585 if (i == descriptor_->field_count()) { 586 GenerateSerializeOneExtensionRange(printer, sorted_extensions[j++]); 587 } else if (j == sorted_extensions.size()) { 588 GenerateSerializeOneField(printer, sorted_fields[i++]); 589 } else if (sorted_fields[i]->number() < sorted_extensions[j]->start) { 590 GenerateSerializeOneField(printer, sorted_fields[i++]); 591 } else { 592 GenerateSerializeOneExtensionRange(printer, sorted_extensions[j++]); 593 } 594 } 595 596 if (UseUnknownFieldSet(descriptor_)) { 597 if (descriptor_->options().message_set_wire_format()) { 598 printer->Print( 599 "getUnknownFields().writeAsMessageSetTo(output);\n"); 600 } else { 601 printer->Print( 602 "getUnknownFields().writeTo(output);\n"); 603 } 604 } else { 605 printer->Print( 606 "output.writeRawBytes(unknownFields);\n"); 607 } 608 609 printer->Outdent(); 610 printer->Print( 611 "}\n" 612 "\n" 613 "private int memoizedSerializedSize = -1;\n" 614 "public int getSerializedSize() {\n" 615 " int size = memoizedSerializedSize;\n" 616 " if (size != -1) return size;\n" 617 "\n" 618 " size = 0;\n"); 619 printer->Indent(); 620 621 for (int i = 0; i < descriptor_->field_count(); i++) { 622 field_generators_.get(sorted_fields[i]).GenerateSerializedSizeCode(printer); 623 } 624 625 if (descriptor_->extension_range_count() > 0) { 626 if (descriptor_->options().message_set_wire_format()) { 627 printer->Print( 628 "size += extensionsSerializedSizeAsMessageSet();\n"); 629 } else { 630 printer->Print( 631 "size += extensionsSerializedSize();\n"); 632 } 633 } 634 635 if (UseUnknownFieldSet(descriptor_)) { 636 if (descriptor_->options().message_set_wire_format()) { 637 printer->Print( 638 "size += getUnknownFields().getSerializedSizeAsMessageSet();\n"); 639 } else { 640 printer->Print( 641 "size += getUnknownFields().getSerializedSize();\n"); 642 } 643 } else { 644 printer->Print( 645 "size += unknownFields.size();\n"); 646 } 647 648 printer->Outdent(); 649 printer->Print( 650 " memoizedSerializedSize = size;\n" 651 " return size;\n" 652 "}\n" 653 "\n"); 654 655 printer->Print( 656 "private static final long serialVersionUID = 0L;\n" 657 "@java.lang.Override\n" 658 "protected java.lang.Object writeReplace()\n" 659 " throws java.io.ObjectStreamException {\n" 660 " return super.writeReplace();\n" 661 "}\n" 662 "\n"); 663 } 664 665 void ImmutableMessageGenerator:: 666 GenerateParseFromMethods(io::Printer* printer) { 667 // Note: These are separate from GenerateMessageSerializationMethods() 668 // because they need to be generated even for messages that are optimized 669 // for code size. 670 printer->Print( 671 "public static $classname$ parseFrom(\n" 672 " com.google.protobuf.ByteString data)\n" 673 " throws com.google.protobuf.InvalidProtocolBufferException {\n" 674 " return PARSER.parseFrom(data);\n" 675 "}\n" 676 "public static $classname$ parseFrom(\n" 677 " com.google.protobuf.ByteString data,\n" 678 " com.google.protobuf.ExtensionRegistryLite extensionRegistry)\n" 679 " throws com.google.protobuf.InvalidProtocolBufferException {\n" 680 " return PARSER.parseFrom(data, extensionRegistry);\n" 681 "}\n" 682 "public static $classname$ parseFrom(byte[] data)\n" 683 " throws com.google.protobuf.InvalidProtocolBufferException {\n" 684 " return PARSER.parseFrom(data);\n" 685 "}\n" 686 "public static $classname$ parseFrom(\n" 687 " byte[] data,\n" 688 " com.google.protobuf.ExtensionRegistryLite extensionRegistry)\n" 689 " throws com.google.protobuf.InvalidProtocolBufferException {\n" 690 " return PARSER.parseFrom(data, extensionRegistry);\n" 691 "}\n" 692 "public static $classname$ parseFrom(java.io.InputStream input)\n" 693 " throws java.io.IOException {\n" 694 " return PARSER.parseFrom(input);\n" 695 "}\n" 696 "public static $classname$ parseFrom(\n" 697 " java.io.InputStream input,\n" 698 " com.google.protobuf.ExtensionRegistryLite extensionRegistry)\n" 699 " throws java.io.IOException {\n" 700 " return PARSER.parseFrom(input, extensionRegistry);\n" 701 "}\n" 702 "public static $classname$ parseDelimitedFrom(java.io.InputStream input)\n" 703 " throws java.io.IOException {\n" 704 " return PARSER.parseDelimitedFrom(input);\n" 705 "}\n" 706 "public static $classname$ parseDelimitedFrom(\n" 707 " java.io.InputStream input,\n" 708 " com.google.protobuf.ExtensionRegistryLite extensionRegistry)\n" 709 " throws java.io.IOException {\n" 710 " return PARSER.parseDelimitedFrom(input, extensionRegistry);\n" 711 "}\n" 712 "public static $classname$ parseFrom(\n" 713 " com.google.protobuf.CodedInputStream input)\n" 714 " throws java.io.IOException {\n" 715 " return PARSER.parseFrom(input);\n" 716 "}\n" 717 "public static $classname$ parseFrom(\n" 718 " com.google.protobuf.CodedInputStream input,\n" 719 " com.google.protobuf.ExtensionRegistryLite extensionRegistry)\n" 720 " throws java.io.IOException {\n" 721 " return PARSER.parseFrom(input, extensionRegistry);\n" 722 "}\n" 723 "\n", 724 "classname", name_resolver_->GetImmutableClassName(descriptor_)); 725 } 726 727 void ImmutableMessageGenerator::GenerateSerializeOneField( 728 io::Printer* printer, const FieldDescriptor* field) { 729 field_generators_.get(field).GenerateSerializationCode(printer); 730 } 731 732 void ImmutableMessageGenerator::GenerateSerializeOneExtensionRange( 733 io::Printer* printer, const Descriptor::ExtensionRange* range) { 734 printer->Print( 735 "extensionWriter.writeUntil($end$, output);\n", 736 "end", SimpleItoa(range->end)); 737 } 738 739 // =================================================================== 740 741 void ImmutableMessageGenerator::GenerateBuilder(io::Printer* printer) { 742 printer->Print( 743 "public static Builder newBuilder() { return Builder.create(); }\n" 744 "public Builder newBuilderForType() { return newBuilder(); }\n" 745 "public static Builder newBuilder($classname$ prototype) {\n" 746 " return newBuilder().mergeFrom(prototype);\n" 747 "}\n" 748 "public Builder toBuilder() { return newBuilder(this); }\n" 749 "\n", 750 "classname", name_resolver_->GetImmutableClassName(descriptor_)); 751 752 if (HasNestedBuilders(descriptor_)) { 753 printer->Print( 754 "@java.lang.Override\n" 755 "protected Builder newBuilderForType(\n" 756 " com.google.protobuf.GeneratedMessage.BuilderParent parent) {\n" 757 " Builder builder = new Builder(parent);\n" 758 " return builder;\n" 759 "}\n"); 760 } 761 762 WriteMessageDocComment(printer, descriptor_); 763 764 if (descriptor_->extension_range_count() > 0) { 765 if (HasDescriptorMethods(descriptor_)) { 766 printer->Print( 767 "public static final class Builder extends\n" 768 " com.google.protobuf.GeneratedMessage.ExtendableBuilder<\n" 769 " $classname$, Builder> implements\n" 770 " $extra_interfaces$\n" 771 " $classname$OrBuilder {\n", 772 "classname", name_resolver_->GetImmutableClassName(descriptor_), 773 "extra_interfaces", ExtraBuilderInterfaces(descriptor_)); 774 } else { 775 printer->Print( 776 "public static final class Builder extends\n" 777 " com.google.protobuf.GeneratedMessageLite.ExtendableBuilder<\n" 778 " $classname$, Builder> implements\n" 779 " $extra_interfaces$\n" 780 " $classname$OrBuilder {\n", 781 "classname", name_resolver_->GetImmutableClassName(descriptor_), 782 "extra_interfaces", ExtraBuilderInterfaces(descriptor_)); 783 } 784 } else { 785 if (HasDescriptorMethods(descriptor_)) { 786 printer->Print( 787 "public static final class Builder extends\n" 788 " com.google.protobuf.GeneratedMessage.Builder<Builder> implements\n" 789 " $extra_interfaces$\n" 790 " $classname$OrBuilder {\n", 791 "classname", name_resolver_->GetImmutableClassName(descriptor_), 792 "extra_interfaces", ExtraBuilderInterfaces(descriptor_)); 793 } else { 794 printer->Print( 795 "public static final class Builder extends\n" 796 " com.google.protobuf.GeneratedMessageLite.Builder<\n" 797 " $classname$, Builder>\n" 798 " implements\n" 799 " $extra_interfaces$\n" 800 " $classname$OrBuilder {\n", 801 "classname", name_resolver_->GetImmutableClassName(descriptor_), 802 "extra_interfaces", ExtraBuilderInterfaces(descriptor_)); 803 } 804 } 805 printer->Indent(); 806 807 GenerateDescriptorMethods(printer); 808 GenerateCommonBuilderMethods(printer); 809 810 if (HasGeneratedMethods(descriptor_)) { 811 GenerateIsInitialized(printer, DONT_MEMOIZE); 812 GenerateBuilderParsingMethods(printer); 813 } 814 815 // oneof 816 map<string, string> vars; 817 for (int i = 0; i < descriptor_->oneof_decl_count(); i++) { 818 vars["oneof_name"] = context_->GetOneofGeneratorInfo( 819 descriptor_->oneof_decl(i))->name; 820 vars["oneof_capitalized_name"] = context_->GetOneofGeneratorInfo( 821 descriptor_->oneof_decl(i))->capitalized_name; 822 vars["oneof_index"] = SimpleItoa(descriptor_->oneof_decl(i)->index()); 823 // oneofCase_ and oneof_ 824 printer->Print(vars, 825 "private int $oneof_name$Case_ = 0;\n" 826 "private java.lang.Object $oneof_name$_;\n"); 827 // oneofCase() and clearOneof() 828 printer->Print(vars, 829 "public $oneof_capitalized_name$Case\n" 830 " get$oneof_capitalized_name$Case() {\n" 831 " return $oneof_capitalized_name$Case.valueOf(\n" 832 " $oneof_name$Case_);\n" 833 "}\n" 834 "\n" 835 "public Builder clear$oneof_capitalized_name$() {\n" 836 " $oneof_name$Case_ = 0;\n" 837 " $oneof_name$_ = null;\n"); 838 if (HasDescriptorMethods(descriptor_)) { 839 printer->Print(" onChanged();\n"); 840 } 841 printer->Print( 842 " return this;\n" 843 "}\n" 844 "\n"); 845 } 846 847 if (GenerateHasBits(descriptor_)) { 848 // Integers for bit fields. 849 int totalBits = 0; 850 for (int i = 0; i < descriptor_->field_count(); i++) { 851 totalBits += field_generators_.get(descriptor_->field(i)) 852 .GetNumBitsForBuilder(); 853 } 854 int totalInts = (totalBits + 31) / 32; 855 for (int i = 0; i < totalInts; i++) { 856 printer->Print("private int $bit_field_name$;\n", 857 "bit_field_name", GetBitFieldName(i)); 858 } 859 } 860 861 for (int i = 0; i < descriptor_->field_count(); i++) { 862 printer->Print("\n"); 863 field_generators_.get(descriptor_->field(i)) 864 .GenerateBuilderMembers(printer); 865 } 866 867 printer->Print( 868 "\n" 869 "// @@protoc_insertion_point(builder_scope:$full_name$)\n", 870 "full_name", descriptor_->full_name()); 871 872 printer->Outdent(); 873 printer->Print("}\n"); 874 } 875 876 void ImmutableMessageGenerator:: 877 GenerateDescriptorMethods(io::Printer* printer) { 878 if (HasDescriptorMethods(descriptor_)) { 879 if (!descriptor_->options().no_standard_descriptor_accessor()) { 880 printer->Print( 881 "public static final com.google.protobuf.Descriptors.Descriptor\n" 882 " getDescriptor() {\n" 883 " return $fileclass$.internal_$identifier$_descriptor;\n" 884 "}\n" 885 "\n", 886 "fileclass", name_resolver_->GetImmutableClassName(descriptor_->file()), 887 "identifier", UniqueFileScopeIdentifier(descriptor_)); 888 } 889 printer->Print( 890 "protected com.google.protobuf.GeneratedMessage.FieldAccessorTable\n" 891 " internalGetFieldAccessorTable() {\n" 892 " return $fileclass$.internal_$identifier$_fieldAccessorTable\n" 893 " .ensureFieldAccessorsInitialized(\n" 894 " $classname$.class, $classname$.Builder.class);\n" 895 "}\n" 896 "\n", 897 "classname", name_resolver_->GetImmutableClassName(descriptor_), 898 "fileclass", name_resolver_->GetImmutableClassName(descriptor_->file()), 899 "identifier", UniqueFileScopeIdentifier(descriptor_)); 900 } 901 } 902 903 // =================================================================== 904 905 void ImmutableMessageGenerator:: 906 GenerateCommonBuilderMethods(io::Printer* printer) { 907 printer->Print( 908 "// Construct using $classname$.newBuilder()\n" 909 "private Builder() {\n" 910 " maybeForceBuilderInitialization();\n" 911 "}\n" 912 "\n", 913 "classname", name_resolver_->GetImmutableClassName(descriptor_)); 914 915 if (HasDescriptorMethods(descriptor_)) { 916 printer->Print( 917 "private Builder(\n" 918 " com.google.protobuf.GeneratedMessage.BuilderParent parent) {\n" 919 " super(parent);\n" 920 " maybeForceBuilderInitialization();\n" 921 "}\n", 922 "classname", name_resolver_->GetImmutableClassName(descriptor_)); 923 } 924 925 926 if (HasNestedBuilders(descriptor_)) { 927 printer->Print( 928 "private void maybeForceBuilderInitialization() {\n" 929 " if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {\n"); 930 931 printer->Indent(); 932 printer->Indent(); 933 for (int i = 0; i < descriptor_->field_count(); i++) { 934 if (!descriptor_->field(i)->containing_oneof()) { 935 field_generators_.get(descriptor_->field(i)) 936 .GenerateFieldBuilderInitializationCode(printer); 937 } 938 } 939 printer->Outdent(); 940 printer->Outdent(); 941 942 printer->Print( 943 " }\n" 944 "}\n"); 945 } else { 946 printer->Print( 947 "private void maybeForceBuilderInitialization() {\n" 948 "}\n"); 949 } 950 951 printer->Print( 952 "private static Builder create() {\n" 953 " return new Builder();\n" 954 "}\n" 955 "\n" 956 "public Builder clear() {\n" 957 " super.clear();\n", 958 "classname", name_resolver_->GetImmutableClassName(descriptor_)); 959 960 printer->Indent(); 961 962 for (int i = 0; i < descriptor_->field_count(); i++) { 963 if (!descriptor_->field(i)->containing_oneof()) { 964 field_generators_.get(descriptor_->field(i)) 965 .GenerateBuilderClearCode(printer); 966 } 967 } 968 969 for (int i = 0; i < descriptor_->oneof_decl_count(); i++) { 970 printer->Print( 971 "$oneof_name$Case_ = 0;\n" 972 "$oneof_name$_ = null;\n", 973 "oneof_name", context_->GetOneofGeneratorInfo( 974 descriptor_->oneof_decl(i))->name); 975 } 976 977 printer->Outdent(); 978 979 printer->Print( 980 " return this;\n" 981 "}\n" 982 "\n" 983 "public Builder clone() {\n" 984 " return create().mergeFrom(buildPartial());\n" 985 "}\n" 986 "\n", 987 "classname", name_resolver_->GetImmutableClassName(descriptor_)); 988 if (HasDescriptorMethods(descriptor_)) { 989 printer->Print( 990 "public com.google.protobuf.Descriptors.Descriptor\n" 991 " getDescriptorForType() {\n" 992 " return $fileclass$.internal_$identifier$_descriptor;\n" 993 "}\n" 994 "\n", 995 "fileclass", name_resolver_->GetImmutableClassName(descriptor_->file()), 996 "identifier", UniqueFileScopeIdentifier(descriptor_)); 997 } 998 printer->Print( 999 "public $classname$ getDefaultInstanceForType() {\n" 1000 " return $classname$.getDefaultInstance();\n" 1001 "}\n" 1002 "\n", 1003 "classname", name_resolver_->GetImmutableClassName(descriptor_)); 1004 1005 // ----------------------------------------------------------------- 1006 1007 printer->Print( 1008 "public $classname$ build() {\n" 1009 " $classname$ result = buildPartial();\n" 1010 " if (!result.isInitialized()) {\n" 1011 " throw newUninitializedMessageException(result);\n" 1012 " }\n" 1013 " return result;\n" 1014 "}\n" 1015 "\n" 1016 "public $classname$ buildPartial() {\n" 1017 " $classname$ result = new $classname$(this);\n", 1018 "classname", name_resolver_->GetImmutableClassName(descriptor_)); 1019 1020 printer->Indent(); 1021 1022 int totalBuilderBits = 0; 1023 int totalMessageBits = 0; 1024 for (int i = 0; i < descriptor_->field_count(); i++) { 1025 const ImmutableFieldGenerator& field = 1026 field_generators_.get(descriptor_->field(i)); 1027 totalBuilderBits += field.GetNumBitsForBuilder(); 1028 totalMessageBits += field.GetNumBitsForMessage(); 1029 } 1030 int totalBuilderInts = (totalBuilderBits + 31) / 32; 1031 int totalMessageInts = (totalMessageBits + 31) / 32; 1032 1033 if (GenerateHasBits(descriptor_)) { 1034 // Local vars for from and to bit fields to avoid accessing the builder and 1035 // message over and over for these fields. Seems to provide a slight 1036 // perforamance improvement in micro benchmark and this is also what proto1 1037 // code does. 1038 for (int i = 0; i < totalBuilderInts; i++) { 1039 printer->Print("int from_$bit_field_name$ = $bit_field_name$;\n", 1040 "bit_field_name", GetBitFieldName(i)); 1041 } 1042 for (int i = 0; i < totalMessageInts; i++) { 1043 printer->Print("int to_$bit_field_name$ = 0;\n", 1044 "bit_field_name", GetBitFieldName(i)); 1045 } 1046 } 1047 1048 // Output generation code for each field. 1049 for (int i = 0; i < descriptor_->field_count(); i++) { 1050 field_generators_.get(descriptor_->field(i)).GenerateBuildingCode(printer); 1051 } 1052 1053 if (GenerateHasBits(descriptor_)) { 1054 // Copy the bit field results to the generated message 1055 for (int i = 0; i < totalMessageInts; i++) { 1056 printer->Print("result.$bit_field_name$ = to_$bit_field_name$;\n", 1057 "bit_field_name", GetBitFieldName(i)); 1058 } 1059 } 1060 1061 for (int i = 0; i < descriptor_->oneof_decl_count(); i++) { 1062 printer->Print("result.$oneof_name$Case_ = $oneof_name$Case_;\n", 1063 "oneof_name", context_->GetOneofGeneratorInfo( 1064 descriptor_->oneof_decl(i))->name); 1065 } 1066 1067 printer->Outdent(); 1068 1069 if (HasDescriptorMethods(descriptor_)) { 1070 printer->Print( 1071 " onBuilt();\n"); 1072 } 1073 1074 printer->Print( 1075 " return result;\n" 1076 "}\n" 1077 "\n", 1078 "classname", name_resolver_->GetImmutableClassName(descriptor_)); 1079 1080 // ----------------------------------------------------------------- 1081 1082 if (HasGeneratedMethods(descriptor_)) { 1083 // MergeFrom(Message other) requires the ability to distinguish the other 1084 // messages type by its descriptor. 1085 if (HasDescriptorMethods(descriptor_)) { 1086 printer->Print( 1087 "public Builder mergeFrom(com.google.protobuf.Message other) {\n" 1088 " if (other instanceof $classname$) {\n" 1089 " return mergeFrom(($classname$)other);\n" 1090 " } else {\n" 1091 " super.mergeFrom(other);\n" 1092 " return this;\n" 1093 " }\n" 1094 "}\n" 1095 "\n", 1096 "classname", name_resolver_->GetImmutableClassName(descriptor_)); 1097 } 1098 1099 printer->Print( 1100 "public Builder mergeFrom($classname$ other) {\n" 1101 // Optimization: If other is the default instance, we know none of its 1102 // fields are set so we can skip the merge. 1103 " if (other == $classname$.getDefaultInstance()) return this;\n", 1104 "classname", name_resolver_->GetImmutableClassName(descriptor_)); 1105 printer->Indent(); 1106 1107 for (int i = 0; i < descriptor_->field_count(); i++) { 1108 if (!descriptor_->field(i)->containing_oneof()) { 1109 field_generators_.get( 1110 descriptor_->field(i)).GenerateMergingCode(printer); 1111 } 1112 } 1113 1114 // Merge oneof fields. 1115 for (int i = 0; i < descriptor_->oneof_decl_count(); ++i) { 1116 printer->Print( 1117 "switch (other.get$oneof_capitalized_name$Case()) {\n", 1118 "oneof_capitalized_name", 1119 context_->GetOneofGeneratorInfo( 1120 descriptor_->oneof_decl(i))->capitalized_name); 1121 printer->Indent(); 1122 for (int j = 0; j < descriptor_->oneof_decl(i)->field_count(); j++) { 1123 const FieldDescriptor* field = descriptor_->oneof_decl(i)->field(j); 1124 printer->Print( 1125 "case $field_name$: {\n", 1126 "field_name", 1127 ToUpper(field->name())); 1128 printer->Indent(); 1129 field_generators_.get(field).GenerateMergingCode(printer); 1130 printer->Print( 1131 "break;\n"); 1132 printer->Outdent(); 1133 printer->Print( 1134 "}\n"); 1135 } 1136 printer->Print( 1137 "case $cap_oneof_name$_NOT_SET: {\n" 1138 " break;\n" 1139 "}\n", 1140 "cap_oneof_name", 1141 ToUpper(context_->GetOneofGeneratorInfo( 1142 descriptor_->oneof_decl(i))->name)); 1143 printer->Outdent(); 1144 printer->Print( 1145 "}\n"); 1146 } 1147 1148 printer->Outdent(); 1149 1150 // if message type has extensions 1151 if (descriptor_->extension_range_count() > 0) { 1152 printer->Print( 1153 " this.mergeExtensionFields(other);\n"); 1154 } 1155 1156 if (UseUnknownFieldSet(descriptor_)) { 1157 printer->Print( 1158 " this.mergeUnknownFields(other.getUnknownFields());\n"); 1159 } else { 1160 printer->Print( 1161 " setUnknownFields(\n" 1162 " getUnknownFields().concat(other.unknownFields));\n"); 1163 } 1164 1165 printer->Print( 1166 " return this;\n" 1167 "}\n" 1168 "\n"); 1169 } 1170 } 1171 1172 // =================================================================== 1173 1174 void ImmutableMessageGenerator:: 1175 GenerateBuilderParsingMethods(io::Printer* printer) { 1176 printer->Print( 1177 "public Builder mergeFrom(\n" 1178 " com.google.protobuf.CodedInputStream input,\n" 1179 " com.google.protobuf.ExtensionRegistryLite extensionRegistry)\n" 1180 " throws java.io.IOException {\n" 1181 " $classname$ parsedMessage = null;\n" 1182 " try {\n" 1183 " parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);\n" 1184 " } catch (com.google.protobuf.InvalidProtocolBufferException e) {\n" 1185 " parsedMessage = ($classname$) e.getUnfinishedMessage();\n" 1186 " throw e;\n" 1187 " } finally {\n" 1188 " if (parsedMessage != null) {\n" 1189 " mergeFrom(parsedMessage);\n" 1190 " }\n" 1191 " }\n" 1192 " return this;\n" 1193 "}\n", 1194 "classname", name_resolver_->GetImmutableClassName(descriptor_)); 1195 } 1196 1197 // =================================================================== 1198 1199 void ImmutableMessageGenerator::GenerateIsInitialized( 1200 io::Printer* printer, UseMemoization useMemoization) { 1201 bool memoization = useMemoization == MEMOIZE; 1202 if (memoization) { 1203 // Memoizes whether the protocol buffer is fully initialized (has all 1204 // required fields). -1 means not yet computed. 0 means false and 1 means 1205 // true. 1206 printer->Print( 1207 "private byte memoizedIsInitialized = -1;\n"); 1208 } 1209 printer->Print( 1210 "public final boolean isInitialized() {\n"); 1211 printer->Indent(); 1212 1213 if (memoization) { 1214 // Don't directly compare to -1 to avoid an Android x86 JIT bug. 1215 printer->Print( 1216 "byte isInitialized = memoizedIsInitialized;\n" 1217 "if (isInitialized == 1) return true;\n" 1218 "if (isInitialized == 0) return false;\n" 1219 "\n"); 1220 } 1221 1222 // Check that all required fields in this message are set. 1223 // TODO(kenton): We can optimize this when we switch to putting all the 1224 // "has" fields into a single bitfield. 1225 for (int i = 0; i < descriptor_->field_count(); i++) { 1226 const FieldDescriptor* field = descriptor_->field(i); 1227 const FieldGeneratorInfo* info = context_->GetFieldGeneratorInfo(field); 1228 1229 if (field->is_required()) { 1230 printer->Print( 1231 "if (!has$name$()) {\n" 1232 " $memoize$\n" 1233 " return false;\n" 1234 "}\n", 1235 "name", info->capitalized_name, 1236 "memoize", memoization ? "memoizedIsInitialized = 0;" : ""); 1237 } 1238 } 1239 1240 // Now check that all embedded messages are initialized. 1241 for (int i = 0; i < descriptor_->field_count(); i++) { 1242 const FieldDescriptor* field = descriptor_->field(i); 1243 const FieldGeneratorInfo* info = context_->GetFieldGeneratorInfo(field); 1244 if (GetJavaType(field) == JAVATYPE_MESSAGE && 1245 HasRequiredFields(field->message_type())) { 1246 switch (field->label()) { 1247 case FieldDescriptor::LABEL_REQUIRED: 1248 printer->Print( 1249 "if (!get$name$().isInitialized()) {\n" 1250 " $memoize$\n" 1251 " return false;\n" 1252 "}\n", 1253 "type", name_resolver_->GetImmutableClassName( 1254 field->message_type()), 1255 "name", info->capitalized_name, 1256 "memoize", memoization ? "memoizedIsInitialized = 0;" : ""); 1257 break; 1258 case FieldDescriptor::LABEL_OPTIONAL: 1259 printer->Print( 1260 "if (has$name$()) {\n" 1261 " if (!get$name$().isInitialized()) {\n" 1262 " $memoize$\n" 1263 " return false;\n" 1264 " }\n" 1265 "}\n", 1266 "type", name_resolver_->GetImmutableClassName( 1267 field->message_type()), 1268 "name", info->capitalized_name, 1269 "memoize", memoization ? "memoizedIsInitialized = 0;" : ""); 1270 break; 1271 case FieldDescriptor::LABEL_REPEATED: 1272 printer->Print( 1273 "for (int i = 0; i < get$name$Count(); i++) {\n" 1274 " if (!get$name$(i).isInitialized()) {\n" 1275 " $memoize$\n" 1276 " return false;\n" 1277 " }\n" 1278 "}\n", 1279 "type", name_resolver_->GetImmutableClassName( 1280 field->message_type()), 1281 "name", info->capitalized_name, 1282 "memoize", memoization ? "memoizedIsInitialized = 0;" : ""); 1283 break; 1284 } 1285 } 1286 } 1287 1288 if (descriptor_->extension_range_count() > 0) { 1289 printer->Print( 1290 "if (!extensionsAreInitialized()) {\n" 1291 " $memoize$\n" 1292 " return false;\n" 1293 "}\n", 1294 "memoize", memoization ? "memoizedIsInitialized = 0;" : ""); 1295 } 1296 1297 printer->Outdent(); 1298 1299 if (memoization) { 1300 printer->Print( 1301 " memoizedIsInitialized = 1;\n"); 1302 } 1303 1304 printer->Print( 1305 " return true;\n" 1306 "}\n" 1307 "\n"); 1308 } 1309 1310 // =================================================================== 1311 1312 namespace { 1313 bool CheckHasBitsForEqualsAndHashCode(const FieldDescriptor* field) { 1314 if (field->is_repeated()) { 1315 return false; 1316 } 1317 if (SupportFieldPresence(field->file())) { 1318 return true; 1319 } 1320 return GetJavaType(field) == JAVATYPE_MESSAGE && 1321 field->containing_oneof() == NULL; 1322 } 1323 } // namespace 1324 1325 void ImmutableMessageGenerator:: 1326 GenerateEqualsAndHashCode(io::Printer* printer) { 1327 printer->Print( 1328 "@java.lang.Override\n" 1329 "public boolean equals(final java.lang.Object obj) {\n"); 1330 printer->Indent(); 1331 printer->Print( 1332 "if (obj == this) {\n" 1333 " return true;\n" 1334 "}\n" 1335 "if (!(obj instanceof $classname$)) {\n" 1336 " return super.equals(obj);\n" 1337 "}\n" 1338 "$classname$ other = ($classname$) obj;\n" 1339 "\n", 1340 "classname", name_resolver_->GetImmutableClassName(descriptor_)); 1341 1342 printer->Print("boolean result = true;\n"); 1343 for (int i = 0; i < descriptor_->field_count(); i++) { 1344 const FieldDescriptor* field = descriptor_->field(i); 1345 const FieldGeneratorInfo* info = context_->GetFieldGeneratorInfo(field); 1346 bool check_has_bits = CheckHasBitsForEqualsAndHashCode(field); 1347 if (check_has_bits) { 1348 printer->Print( 1349 "result = result && (has$name$() == other.has$name$());\n" 1350 "if (has$name$()) {\n", 1351 "name", info->capitalized_name); 1352 printer->Indent(); 1353 } 1354 field_generators_.get(field).GenerateEqualsCode(printer); 1355 if (check_has_bits) { 1356 printer->Outdent(); 1357 printer->Print( 1358 "}\n"); 1359 } 1360 } 1361 if (HasDescriptorMethods(descriptor_)) { 1362 printer->Print( 1363 "result = result &&\n" 1364 " getUnknownFields().equals(other.getUnknownFields());\n"); 1365 if (descriptor_->extension_range_count() > 0) { 1366 printer->Print( 1367 "result = result &&\n" 1368 " getExtensionFields().equals(other.getExtensionFields());\n"); 1369 } 1370 } 1371 printer->Print( 1372 "return result;\n"); 1373 printer->Outdent(); 1374 printer->Print( 1375 "}\n" 1376 "\n"); 1377 1378 printer->Print( 1379 "@java.lang.Override\n" 1380 "public int hashCode() {\n"); 1381 printer->Indent(); 1382 printer->Print( 1383 "if (memoizedHashCode != 0) {\n"); 1384 printer->Indent(); 1385 printer->Print( 1386 "return memoizedHashCode;\n"); 1387 printer->Outdent(); 1388 printer->Print( 1389 "}\n" 1390 "int hash = 41;\n"); 1391 1392 if (HasDescriptorMethods(descriptor_)) { 1393 printer->Print("hash = (19 * hash) + getDescriptorForType().hashCode();\n"); 1394 } else { 1395 // Include the hash of the class so that two objects with different types 1396 // but the same field values will probably have different hashes. 1397 printer->Print("hash = (19 * hash) + $classname$.class.hashCode();\n", 1398 "classname", name_resolver_->GetImmutableClassName(descriptor_)); 1399 } 1400 1401 for (int i = 0; i < descriptor_->field_count(); i++) { 1402 const FieldDescriptor* field = descriptor_->field(i); 1403 const FieldGeneratorInfo* info = context_->GetFieldGeneratorInfo(field); 1404 bool check_has_bits = CheckHasBitsForEqualsAndHashCode(field); 1405 if (check_has_bits) { 1406 printer->Print( 1407 "if (has$name$()) {\n", 1408 "name", info->capitalized_name); 1409 printer->Indent(); 1410 } 1411 field_generators_.get(field).GenerateHashCode(printer); 1412 if (check_has_bits) { 1413 printer->Outdent(); 1414 printer->Print("}\n"); 1415 } 1416 } 1417 if (HasDescriptorMethods(descriptor_)) { 1418 if (descriptor_->extension_range_count() > 0) { 1419 printer->Print( 1420 "hash = hashFields(hash, getExtensionFields());\n"); 1421 } 1422 } 1423 1424 if (UseUnknownFieldSet(descriptor_)) { 1425 printer->Print( 1426 "hash = (29 * hash) + getUnknownFields().hashCode();\n"); 1427 } else { 1428 printer->Print( 1429 "hash = (29 * hash) + unknownFields.hashCode();\n"); 1430 } 1431 printer->Print( 1432 "memoizedHashCode = hash;\n" 1433 "return hash;\n"); 1434 printer->Outdent(); 1435 printer->Print( 1436 "}\n" 1437 "\n"); 1438 } 1439 1440 // =================================================================== 1441 1442 void ImmutableMessageGenerator:: 1443 GenerateExtensionRegistrationCode(io::Printer* printer) { 1444 for (int i = 0; i < descriptor_->extension_count(); i++) { 1445 ImmutableExtensionGenerator(descriptor_->extension(i), context_) 1446 .GenerateRegistrationCode(printer); 1447 } 1448 1449 for (int i = 0; i < descriptor_->nested_type_count(); i++) { 1450 ImmutableMessageGenerator(descriptor_->nested_type(i), context_) 1451 .GenerateExtensionRegistrationCode(printer); 1452 } 1453 } 1454 1455 // =================================================================== 1456 void ImmutableMessageGenerator:: 1457 GenerateParsingConstructor(io::Printer* printer) { 1458 scoped_array<const FieldDescriptor*> sorted_fields( 1459 SortFieldsByNumber(descriptor_)); 1460 1461 printer->Print( 1462 "private $classname$(\n" 1463 " com.google.protobuf.CodedInputStream input,\n" 1464 " com.google.protobuf.ExtensionRegistryLite extensionRegistry)\n" 1465 " throws com.google.protobuf.InvalidProtocolBufferException {\n", 1466 "classname", descriptor_->name()); 1467 printer->Indent(); 1468 1469 // Initialize all fields to default. 1470 printer->Print( 1471 "initFields();\n"); 1472 1473 // Use builder bits to track mutable repeated fields. 1474 int totalBuilderBits = 0; 1475 for (int i = 0; i < descriptor_->field_count(); i++) { 1476 const ImmutableFieldGenerator& field = 1477 field_generators_.get(descriptor_->field(i)); 1478 totalBuilderBits += field.GetNumBitsForBuilder(); 1479 } 1480 int totalBuilderInts = (totalBuilderBits + 31) / 32; 1481 for (int i = 0; i < totalBuilderInts; i++) { 1482 printer->Print("int mutable_$bit_field_name$ = 0;\n", 1483 "bit_field_name", GetBitFieldName(i)); 1484 } 1485 1486 if (UseUnknownFieldSet(descriptor_)) { 1487 printer->Print( 1488 "com.google.protobuf.UnknownFieldSet.Builder unknownFields =\n" 1489 " com.google.protobuf.UnknownFieldSet.newBuilder();\n"); 1490 } else { 1491 printer->Print( 1492 "com.google.protobuf.ByteString.Output unknownFieldsOutput =\n" 1493 " com.google.protobuf.ByteString.newOutput();\n" 1494 "com.google.protobuf.CodedOutputStream unknownFieldsCodedOutput =\n" 1495 " com.google.protobuf.CodedOutputStream.newInstance(\n" 1496 " unknownFieldsOutput);\n"); 1497 } 1498 1499 printer->Print( 1500 "try {\n"); 1501 printer->Indent(); 1502 1503 printer->Print( 1504 "boolean done = false;\n" 1505 "while (!done) {\n"); 1506 printer->Indent(); 1507 1508 printer->Print( 1509 "int tag = input.readTag();\n" 1510 "switch (tag) {\n"); 1511 printer->Indent(); 1512 1513 printer->Print( 1514 "case 0:\n" // zero signals EOF / limit reached 1515 " done = true;\n" 1516 " break;\n" 1517 "default: {\n" 1518 " if (!parseUnknownField(input,$unknown_fields$\n" 1519 " extensionRegistry, tag)) {\n" 1520 " done = true;\n" // it's an endgroup tag 1521 " }\n" 1522 " break;\n" 1523 "}\n", 1524 "unknown_fields", UseUnknownFieldSet(descriptor_) 1525 ? " unknownFields," : " unknownFieldsCodedOutput,"); 1526 1527 for (int i = 0; i < descriptor_->field_count(); i++) { 1528 const FieldDescriptor* field = sorted_fields[i]; 1529 uint32 tag = WireFormatLite::MakeTag(field->number(), 1530 WireFormat::WireTypeForFieldType(field->type())); 1531 1532 printer->Print( 1533 "case $tag$: {\n", 1534 "tag", SimpleItoa(tag)); 1535 printer->Indent(); 1536 1537 field_generators_.get(field).GenerateParsingCode(printer); 1538 1539 printer->Outdent(); 1540 printer->Print( 1541 " break;\n" 1542 "}\n"); 1543 1544 if (field->is_packable()) { 1545 // To make packed = true wire compatible, we generate parsing code from a 1546 // packed version of this field regardless of field->options().packed(). 1547 uint32 packed_tag = WireFormatLite::MakeTag(field->number(), 1548 WireFormatLite::WIRETYPE_LENGTH_DELIMITED); 1549 printer->Print( 1550 "case $tag$: {\n", 1551 "tag", SimpleItoa(packed_tag)); 1552 printer->Indent(); 1553 1554 field_generators_.get(field).GenerateParsingCodeFromPacked(printer); 1555 1556 printer->Outdent(); 1557 printer->Print( 1558 " break;\n" 1559 "}\n"); 1560 } 1561 } 1562 1563 printer->Outdent(); 1564 printer->Outdent(); 1565 printer->Print( 1566 " }\n" // switch (tag) 1567 "}\n"); // while (!done) 1568 1569 printer->Outdent(); 1570 printer->Print( 1571 "} catch (com.google.protobuf.InvalidProtocolBufferException e) {\n" 1572 " throw e.setUnfinishedMessage(this);\n" 1573 "} catch (java.io.IOException e) {\n" 1574 " throw new com.google.protobuf.InvalidProtocolBufferException(\n" 1575 " e.getMessage()).setUnfinishedMessage(this);\n" 1576 "} finally {\n"); 1577 printer->Indent(); 1578 1579 // Make repeated field list immutable. 1580 for (int i = 0; i < descriptor_->field_count(); i++) { 1581 const FieldDescriptor* field = sorted_fields[i]; 1582 field_generators_.get(field).GenerateParsingDoneCode(printer); 1583 } 1584 1585 // Make unknown fields immutable. 1586 if (UseUnknownFieldSet(descriptor_)) { 1587 printer->Print( 1588 "this.unknownFields = unknownFields.build();\n"); 1589 } else { 1590 printer->Print( 1591 "try {\n" 1592 " unknownFieldsCodedOutput.flush();\n" 1593 "} catch (java.io.IOException e) {\n" 1594 "// Should not happen\n" 1595 "} finally {\n" 1596 " unknownFields = unknownFieldsOutput.toByteString();\n" 1597 "}\n"); 1598 } 1599 1600 // Make extensions immutable. 1601 printer->Print( 1602 "makeExtensionsImmutable();\n"); 1603 1604 printer->Outdent(); 1605 printer->Outdent(); 1606 printer->Print( 1607 " }\n" // finally 1608 "}\n"); 1609 } 1610 1611 // =================================================================== 1612 void ImmutableMessageGenerator::GenerateParser(io::Printer* printer) { 1613 printer->Print( 1614 "public static com.google.protobuf.Parser<$classname$> PARSER =\n" 1615 " new com.google.protobuf.AbstractParser<$classname$>() {\n", 1616 "classname", descriptor_->name()); 1617 printer->Indent(); 1618 printer->Print( 1619 "public $classname$ parsePartialFrom(\n" 1620 " com.google.protobuf.CodedInputStream input,\n" 1621 " com.google.protobuf.ExtensionRegistryLite extensionRegistry)\n" 1622 " throws com.google.protobuf.InvalidProtocolBufferException {\n", 1623 "classname", descriptor_->name()); 1624 if (HasGeneratedMethods(descriptor_)) { 1625 printer->Print( 1626 " return new $classname$(input, extensionRegistry);\n", 1627 "classname", descriptor_->name()); 1628 } else { 1629 // When parsing constructor isn't generated, use builder to parse messages. 1630 // Note, will fallback to use reflection based mergeFieldFrom() in 1631 // AbstractMessage.Builder. 1632 printer->Indent(); 1633 printer->Print( 1634 "Builder builder = newBuilder();\n" 1635 "try {\n" 1636 " builder.mergeFrom(input, extensionRegistry);\n" 1637 "} catch (com.google.protobuf.InvalidProtocolBufferException e) {\n" 1638 " throw e.setUnfinishedMessage(builder.buildPartial());\n" 1639 "} catch (java.io.IOException e) {\n" 1640 " throw new com.google.protobuf.InvalidProtocolBufferException(\n" 1641 " e.getMessage()).setUnfinishedMessage(builder.buildPartial());\n" 1642 "}\n" 1643 "return builder.buildPartial();\n"); 1644 printer->Outdent(); 1645 } 1646 printer->Print( 1647 "}\n"); 1648 printer->Outdent(); 1649 printer->Print( 1650 "};\n" 1651 "\n"); 1652 1653 printer->Print( 1654 "@java.lang.Override\n" 1655 "public com.google.protobuf.Parser<$classname$> getParserForType() {\n" 1656 " return PARSER;\n" 1657 "}\n" 1658 "\n", 1659 "classname", descriptor_->name()); 1660 } 1661 1662 1663 } // namespace java 1664 } // namespace compiler 1665 } // namespace protobuf 1666 } // namespace google 1667
