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message.cc
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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
// Author: kenton@google.com (Kenton Varda)
// Based on original Protocol Buffers design by
// Sanjay Ghemawat, Jeff Dean, and others.
#include "google/protobuf/compiler/java/immutable/message.h"
#include <algorithm>
#include <cstdint>
#include <memory>
#include <string>
#include <vector>
#include "absl/container/flat_hash_map.h"
#include "absl/log/absl_check.h"
#include "absl/strings/ascii.h"
#include "absl/strings/str_cat.h"
#include "absl/strings/string_view.h"
#include "absl/strings/substitute.h"
#include "google/protobuf/compiler/java/context.h"
#include "google/protobuf/compiler/java/doc_comment.h"
#include "google/protobuf/compiler/java/field_common.h"
#include "google/protobuf/compiler/java/generator_common.h"
#include "google/protobuf/compiler/java/helpers.h"
#include "google/protobuf/compiler/java/immutable/enum.h"
#include "google/protobuf/compiler/java/immutable/extension.h"
#include "google/protobuf/compiler/java/immutable/make_field_generators.h"
#include "google/protobuf/compiler/java/immutable/message_builder.h"
#include "google/protobuf/compiler/java/message_serialization.h"
#include "google/protobuf/compiler/java/name_resolver.h"
#include "google/protobuf/descriptor.h"
#include "google/protobuf/descriptor.pb.h"
#include "google/protobuf/io/coded_stream.h"
#include "google/protobuf/io/printer.h"
#include "google/protobuf/wire_format.h"
// Must be last.
#include "google/protobuf/port_def.inc"
namespace google {
namespace protobuf {
namespace compiler {
namespace java {
using internal::WireFormat;
using internal::WireFormatLite;
namespace {
std::string MapValueImmutableClassdName(const Descriptor* descriptor,
ClassNameResolver* name_resolver) {
const FieldDescriptor* value_field = descriptor->map_value();
ABSL_CHECK_EQ(FieldDescriptor::TYPE_MESSAGE, value_field->type());
return name_resolver->GetImmutableClassName(value_field->message_type());
}
} // namespace
// ===================================================================
MessageGenerator::MessageGenerator(const Descriptor* descriptor)
: descriptor_(descriptor) {
for (int i = 0; i < descriptor_->field_count(); i++) {
if (IsRealOneof(descriptor_->field(i))) {
const OneofDescriptor* oneof = descriptor_->field(i)->containing_oneof();
ABSL_CHECK(oneofs_.emplace(oneof->index(), oneof).first->second == oneof);
}
}
}
MessageGenerator::~MessageGenerator() {}
// ===================================================================
ImmutableMessageGenerator::ImmutableMessageGenerator(
const Descriptor* descriptor, Context* context)
: MessageGenerator(descriptor),
context_(context),
name_resolver_(context->GetNameResolver()),
field_generators_(MakeImmutableFieldGenerators(descriptor, context_)) {
ABSL_CHECK(HasDescriptorMethods(descriptor->file(), context->EnforceLite()))
<< "Generator factory error: A non-lite message generator is used to "
"generate lite messages.";
}
ImmutableMessageGenerator::~ImmutableMessageGenerator() {}
void ImmutableMessageGenerator::GenerateStaticVariables(
io::Printer* printer, int* bytecode_estimate) {
// Because descriptor.proto (com.google.protobuf.DescriptorProtos) is
// used in the construction of descriptors, we have a tricky bootstrapping
// problem. To help control static initialization order, we make sure all
// descriptors and other static data that depends on them are members of
// the outermost class in the file. This way, they will be initialized in
// a deterministic order.
absl::flat_hash_map<absl::string_view, std::string> vars;
vars["identifier"] = UniqueFileScopeIdentifier(descriptor_);
vars["index"] = absl::StrCat(descriptor_->index());
vars["classname"] = name_resolver_->GetImmutableClassName(descriptor_);
if (descriptor_->containing_type() != nullptr) {
vars["parent"] = UniqueFileScopeIdentifier(descriptor_->containing_type());
}
if (MultipleJavaFiles(descriptor_->file(), /* immutable = */ true)) {
// We can only make these package-private since the classes that use them
// are in separate files.
vars["private"] = "";
} else {
vars["private"] = "private ";
}
if (*bytecode_estimate <= kMaxStaticSize) {
vars["final"] = "final ";
} else {
vars["final"] = "";
}
// The descriptor for this type.
printer->Print(
vars,
// TODO: final needs to be added back. The way to fix it is to
// generate methods that can construct the types, and then still declare
// the types, and then init them in clinit with the new method calls.
"$private$static $final$com.google.protobuf.Descriptors.Descriptor\n"
" internal_$identifier$_descriptor;\n");
*bytecode_estimate += 30;
// And the FieldAccessorTable.
GenerateFieldAccessorTable(printer, bytecode_estimate);
// Generate static members for all nested types.
for (int i = 0; i < descriptor_->nested_type_count(); i++) {
// TODO: Reuse MessageGenerator objects?
ImmutableMessageGenerator(descriptor_->nested_type(i), context_)
.GenerateStaticVariables(printer, bytecode_estimate);
}
}
int ImmutableMessageGenerator::GenerateStaticVariableInitializers(
io::Printer* printer) {
int bytecode_estimate = 0;
absl::flat_hash_map<absl::string_view, std::string> vars;
vars["identifier"] = UniqueFileScopeIdentifier(descriptor_);
vars["index"] = absl::StrCat(descriptor_->index());
vars["classname"] = name_resolver_->GetImmutableClassName(descriptor_);
if (descriptor_->containing_type() != nullptr) {
vars["parent"] = UniqueFileScopeIdentifier(descriptor_->containing_type());
}
// The descriptor for this type.
if (descriptor_->containing_type() == nullptr) {
printer->Print(vars,
"internal_$identifier$_descriptor =\n"
" getDescriptor().getMessageTypes().get($index$);\n");
bytecode_estimate += 30;
} else {
printer->Print(
vars,
"internal_$identifier$_descriptor =\n"
" internal_$parent$_descriptor.getNestedTypes().get($index$);\n");
bytecode_estimate += 30;
}
// And the FieldAccessorTable.
bytecode_estimate += GenerateFieldAccessorTableInitializer(printer);
// Generate static member initializers for all nested types.
for (int i = 0; i < descriptor_->nested_type_count(); i++) {
// TODO: Reuse MessageGenerator objects?
bytecode_estimate +=
ImmutableMessageGenerator(descriptor_->nested_type(i), context_)
.GenerateStaticVariableInitializers(printer);
}
return bytecode_estimate;
}
void ImmutableMessageGenerator::GenerateFieldAccessorTable(
io::Printer* printer, int* bytecode_estimate) {
absl::flat_hash_map<absl::string_view, std::string> vars;
vars["identifier"] = UniqueFileScopeIdentifier(descriptor_);
if (MultipleJavaFiles(descriptor_->file(), /* immutable = */ true)) {
// We can only make these package-private since the classes that use them
// are in separate files.
vars["private"] = "";
} else {
vars["private"] = "private ";
}
if (*bytecode_estimate <= kMaxStaticSize) {
vars["final"] = "final ";
} else {
vars["final"] = "";
}
printer->Print(vars,
"$private$static $final$\n"
" com.google.protobuf.GeneratedMessage.FieldAccessorTable\n"
" internal_$identifier$_fieldAccessorTable;\n");
// The following bytecode_estimate calculation logic must stay in sync with
// the similar logic in the GenerateFieldAccessorTableInitializer method below
// to make sure that the generated static final fields are initialized in the
// static initialization block directly.
//
// 6 bytes per field and oneof
*bytecode_estimate +=
10 + 6 * descriptor_->field_count() + 6 * descriptor_->oneof_decl_count();
}
int ImmutableMessageGenerator::GenerateFieldAccessorTableInitializer(
io::Printer* printer) {
int bytecode_estimate = 10;
printer->Print(
"internal_$identifier$_fieldAccessorTable = new\n"
" com.google.protobuf.GeneratedMessage.FieldAccessorTable(\n"
" internal_$identifier$_descriptor,\n"
" new java.lang.String[] { ",
"identifier", UniqueFileScopeIdentifier(descriptor_));
// All the bytecode_estimate calculation logic in this method must stay in
// sync with the similar logic in the GenerateFieldAccessorTable method
// above. See the corresponding comment in GenerateFieldAccessorTable for
// details.
for (int i = 0; i < descriptor_->field_count(); i++) {
const FieldDescriptor* field = descriptor_->field(i);
const FieldGeneratorInfo* info = context_->GetFieldGeneratorInfo(field);
bytecode_estimate += 6;
printer->Print("\"$field_name$\", ", "field_name", info->capitalized_name);
}
for (int i = 0; i < descriptor_->real_oneof_decl_count(); i++) {
const OneofDescriptor* oneof = descriptor_->real_oneof_decl(i);
const OneofGeneratorInfo* info = context_->GetOneofGeneratorInfo(oneof);
bytecode_estimate += 6;
printer->Print("\"$oneof_name$\", ", "oneof_name", info->capitalized_name);
}
printer->Print("});\n");
return bytecode_estimate;
}
// ===================================================================
void ImmutableMessageGenerator::GenerateInterface(io::Printer* printer) {
MaybePrintGeneratedAnnotation(context_, printer, descriptor_,
/* immutable = */ true, "OrBuilder");
if (!context_->options().opensource_runtime) {
printer->Print("@com.google.protobuf.Internal.ProtoNonnullApi\n");
}
if (descriptor_->extension_range_count() > 0) {
printer->Print(
"$deprecation$public interface ${$$classname$OrBuilder$}$ extends\n"
" $extra_interfaces$\n"
" com.google.protobuf.GeneratedMessage.\n"
" ExtendableMessageOrBuilder<$classname$> {\n",
"deprecation",
descriptor_->options().deprecated() ? "@java.lang.Deprecated " : "",
"extra_interfaces", ExtraMessageOrBuilderInterfaces(descriptor_),
"classname", descriptor_->name(), "{", "", "}", "");
} else {
printer->Print(
"$deprecation$public interface ${$$classname$OrBuilder$}$ extends\n"
" $extra_interfaces$\n"
" com.google.protobuf.MessageOrBuilder {\n",
"deprecation",
descriptor_->options().deprecated() ? "@java.lang.Deprecated " : "",
"extra_interfaces", ExtraMessageOrBuilderInterfaces(descriptor_),
"classname", descriptor_->name(), "{", "", "}", "");
}
printer->Annotate("{", "}", descriptor_);
printer->Indent();
for (int i = 0; i < descriptor_->field_count(); i++) {
printer->Print("\n");
field_generators_.get(descriptor_->field(i))
.GenerateInterfaceMembers(printer);
}
for (auto& kv : oneofs_) {
printer->Print(
"\n"
"$classname$.$oneof_capitalized_name$Case "
"get$oneof_capitalized_name$Case();\n",
"oneof_capitalized_name",
context_->GetOneofGeneratorInfo(kv.second)->capitalized_name,
"classname",
context_->GetNameResolver()->GetImmutableClassName(descriptor_));
}
printer->Outdent();
printer->Print("}\n");
}
// ===================================================================
void ImmutableMessageGenerator::Generate(io::Printer* printer) {
bool is_own_file = IsOwnFile(descriptor_, /* immutable = */ true);
absl::flat_hash_map<absl::string_view, std::string> variables;
variables["static"] = is_own_file ? "" : "static ";
variables["classname"] = descriptor_->name();
variables["extra_interfaces"] = ExtraMessageInterfaces(descriptor_);
variables["deprecation"] =
descriptor_->options().deprecated() ? "@java.lang.Deprecated " : "";
WriteMessageDocComment(printer, descriptor_, context_->options());
MaybePrintGeneratedAnnotation(context_, printer, descriptor_,
/* immutable = */ true);
if (!context_->options().opensource_runtime) {
printer->Print("@com.google.protobuf.Internal.ProtoNonnullApi\n");
}
// The builder_type stores the super type name of the nested Builder class.
std::string builder_type;
if (descriptor_->extension_range_count() > 0) {
printer->Print(
variables,
"$deprecation$public $static$final class $classname$ extends\n");
printer->Annotate("classname", descriptor_);
printer->Print(
variables,
" com.google.protobuf.GeneratedMessage.ExtendableMessage<\n"
" $classname$> implements\n"
" $extra_interfaces$\n"
" $classname$OrBuilder {\n");
builder_type = absl::Substitute(
"com.google.protobuf.GeneratedMessage.ExtendableBuilder<$0, ?>",
name_resolver_->GetImmutableClassName(descriptor_));
} else {
printer->Print(
variables,
"$deprecation$public $static$final class $classname$ extends\n");
printer->Annotate("classname", descriptor_);
printer->Print(variables,
" com.google.protobuf.GeneratedMessage implements\n"
" $extra_interfaces$\n"
" $classname$OrBuilder {\n");
builder_type = "com.google.protobuf.GeneratedMessage.Builder<?>";
}
printer->Print("private static final long serialVersionUID = 0L;\n");
printer->Indent();
printer->Print("static {\n");
printer->Indent();
PrintGencodeVersionValidator(printer, context_->options().opensource_runtime,
descriptor_->name());
printer->Outdent();
printer->Print("}\n");
// Using builder_type, instead of Builder, prevents the Builder class from
// being loaded into PermGen space when the default instance is created.
// This optimizes the PermGen space usage for clients that do not modify
// messages.
printer->Print(
"// Use $classname$.newBuilder() to construct.\n"
"private $classname$($buildertype$ builder) {\n"
" super(builder);\n"
"}\n",
"classname", descriptor_->name(), "buildertype", builder_type);
printer->Print("private $classname$() {\n", "classname", descriptor_->name());
printer->Indent();
GenerateInitializers(printer);
printer->Outdent();
printer->Print(
"}\n"
"\n");
printer->Print(variables,
"@java.lang.Override\n"
"@SuppressWarnings({\"unused\"})\n"
"protected java.lang.Object newInstance(\n"
" UnusedPrivateParameter unused) {\n"
" return new $classname$();\n"
"}\n"
"\n");
GenerateDescriptorMethods(printer);
// Nested types
for (int i = 0; i < descriptor_->enum_type_count(); i++) {
EnumNonLiteGenerator(descriptor_->enum_type(i), true, context_)
.Generate(printer);
}
for (int i = 0; i < descriptor_->nested_type_count(); i++) {
// Don't generate Java classes for map entry messages.
if (IsMapEntry(descriptor_->nested_type(i))) continue;
ImmutableMessageGenerator messageGenerator(descriptor_->nested_type(i),
context_);
messageGenerator.GenerateInterface(printer);
messageGenerator.Generate(printer);
}
// Integers for bit fields.
int totalBits = 0;
for (int i = 0; i < descriptor_->field_count(); i++) {
totalBits +=
field_generators_.get(descriptor_->field(i)).GetNumBitsForMessage();
}
int totalInts = (totalBits + 31) / 32;
for (int i = 0; i < totalInts; i++) {
printer->Print("private int $bit_field_name$;\n", "bit_field_name",
GetBitFieldName(i));
}
// oneof
absl::flat_hash_map<absl::string_view, std::string> vars;
for (auto& kv : oneofs_) {
const OneofDescriptor* oneof = kv.second;
vars["oneof_name"] = context_->GetOneofGeneratorInfo(oneof)->name;
vars["oneof_capitalized_name"] =
context_->GetOneofGeneratorInfo(oneof)->capitalized_name;
vars["oneof_index"] = absl::StrCat((oneof)->index());
vars["{"] = "";
vars["}"] = "";
// oneofCase_ and oneof_
printer->Print(vars,
"private int $oneof_name$Case_ = 0;\n"
"@SuppressWarnings(\"serial\")\n"
"private java.lang.Object $oneof_name$_;\n");
// OneofCase enum
printer->Print(
vars,
"public enum ${$$oneof_capitalized_name$Case$}$\n"
// TODO: Remove EnumLite when we want to break compatibility with
// 3.x users
" implements com.google.protobuf.Internal.EnumLite,\n"
" com.google.protobuf.AbstractMessage.InternalOneOfEnum {\n");
printer->Annotate("{", "}", oneof);
printer->Indent();
for (int j = 0; j < (oneof)->field_count(); j++) {
const FieldDescriptor* field = (oneof)->field(j);
printer->Print(
"$deprecation$$field_name$($field_number$),\n", "deprecation",
field->options().deprecated() ? "@java.lang.Deprecated " : "",
"field_name", absl::AsciiStrToUpper(field->name()), "field_number",
absl::StrCat(field->number()));
printer->Annotate("field_name", field);
}
printer->Print("$cap_oneof_name$_NOT_SET(0);\n", "cap_oneof_name",
absl::AsciiStrToUpper(vars["oneof_name"]));
printer->Print(vars,
"private final int value;\n"
"private $oneof_capitalized_name$Case(int value) {\n"
" this.value = value;\n"
"}\n");
if (context_->options().opensource_runtime) {
printer->Print(
vars,
"/**\n"
" * @param value The number of the enum to look for.\n"
" * @return The enum associated with the given number.\n"
" * @deprecated Use {@link #forNumber(int)} instead.\n"
" */\n"
"@java.lang.Deprecated\n"
"public static $oneof_capitalized_name$Case valueOf(int value) {\n"
" return forNumber(value);\n"
"}\n"
"\n");
}
printer->Print(
vars,
"public static $oneof_capitalized_name$Case forNumber(int value) {\n"
" switch (value) {\n");
for (int j = 0; j < (oneof)->field_count(); j++) {
const FieldDescriptor* field = (oneof)->field(j);
printer->Print(" case $field_number$: return $field_name$;\n",
"field_number", absl::StrCat(field->number()),
"field_name", absl::AsciiStrToUpper(field->name()));
}
printer->Print(
" case 0: return $cap_oneof_name$_NOT_SET;\n"
" default: return null;\n"
" }\n"
"}\n"
"public int getNumber() {\n"
" return this.value;\n"
"}\n",
"cap_oneof_name", absl::AsciiStrToUpper(vars["oneof_name"]));
printer->Outdent();
printer->Print("};\n\n");
// oneofCase()
printer->Print(vars,
"public $oneof_capitalized_name$Case\n"
"${$get$oneof_capitalized_name$Case$}$() {\n"
" return $oneof_capitalized_name$Case.forNumber(\n"
" $oneof_name$Case_);\n"
"}\n"
"\n");
printer->Annotate("{", "}", oneof);
}
if (IsAnyMessage(descriptor_)) {
GenerateAnyMethods(printer);
}
// Fields
for (int i = 0; i < descriptor_->field_count(); i++) {
printer->Print("public static final int $constant_name$ = $number$;\n",
"constant_name", FieldConstantName(descriptor_->field(i)),
"number", absl::StrCat(descriptor_->field(i)->number()));
printer->Annotate("constant_name", descriptor_->field(i));
field_generators_.get(descriptor_->field(i)).GenerateMembers(printer);
printer->Print("\n");
}
if (context_->HasGeneratedMethods(descriptor_)) {
GenerateIsInitialized(printer);
GenerateMessageSerializationMethods(printer);
GenerateEqualsAndHashCode(printer);
}
GenerateParseFromMethods(printer);
GenerateBuilder(printer);
printer->Print(
"\n"
"// @@protoc_insertion_point(class_scope:$full_name$)\n",
"full_name", descriptor_->full_name());
// Carefully initialize the default instance in such a way that it doesn't
// conflict with other initialization.
printer->Print("private static final $classname$ DEFAULT_INSTANCE;\n",
"classname",
name_resolver_->GetImmutableClassName(descriptor_));
printer->Print(
"static {\n"
" DEFAULT_INSTANCE = new $classname$();\n"
"}\n"
"\n",
"classname", name_resolver_->GetImmutableClassName(descriptor_));
printer->Print(
"public static $classname$ getDefaultInstance() {\n"
" return DEFAULT_INSTANCE;\n"
"}\n"
"\n",
"classname", name_resolver_->GetImmutableClassName(descriptor_));
// 'of' method for Wrappers
if (IsWrappersProtoFile(descriptor_->file())) {
printer->Print(
"public static $classname$ of($field_type$ value) {\n"
" return newBuilder().setValue(value).build();\n"
"}\n"
"\n",
"classname", name_resolver_->GetImmutableClassName(descriptor_),
"field_type", PrimitiveTypeName(GetJavaType(descriptor_->field(0))));
}
GenerateParser(printer);
printer->Print(
"@java.lang.Override\n"
"public $classname$ getDefaultInstanceForType() {\n"
" return DEFAULT_INSTANCE;\n"
"}\n"
"\n",
"classname", name_resolver_->GetImmutableClassName(descriptor_));
// Extensions must be declared after the DEFAULT_INSTANCE is initialized
// because the DEFAULT_INSTANCE is used by the extension to lazily retrieve
// the outer class's FileDescriptor.
for (int i = 0; i < descriptor_->extension_count(); i++) {
ImmutableExtensionGenerator(descriptor_->extension(i), context_)
.Generate(printer);
}
printer->Outdent();
printer->Print("}\n\n");
}
// ===================================================================
void ImmutableMessageGenerator::GenerateMessageSerializationMethods(
io::Printer* printer) {
std::unique_ptr<const FieldDescriptor*[]> sorted_fields(
SortFieldsByNumber(descriptor_));
printer->Print(
"@java.lang.Override\n"
"public void writeTo(com.google.protobuf.CodedOutputStream output)\n"
" throws java.io.IOException {\n");
printer->Indent();
if (HasPackedFields(descriptor_)) {
// writeTo(CodedOutputStream output) might be invoked without
// getSerializedSize() ever being called, but we need the memoized
// sizes in case this message has packed fields. Rather than emit checks
// for each packed field, just call getSerializedSize() up front. In most
// cases, getSerializedSize() will have already been called anyway by one
// of the wrapper writeTo() methods, making this call cheap.
printer->Print("getSerializedSize();\n");
}
if (descriptor_->extension_range_count() > 0) {
if (descriptor_->options().message_set_wire_format()) {
printer->Print(
"com.google.protobuf.GeneratedMessage\n"
" .ExtendableMessage<$classname$>.ExtensionWriter\n"
" extensionWriter = newMessageSetExtensionWriter();\n",
"classname", name_resolver_->GetImmutableClassName(descriptor_));
} else {
printer->Print(
"com.google.protobuf.GeneratedMessage\n"
" .ExtendableMessage<$classname$>.ExtensionWriter\n"
" extensionWriter = newExtensionWriter();\n",
"classname", name_resolver_->GetImmutableClassName(descriptor_));
}
}
GenerateSerializeFieldsAndExtensions(printer,
field_generators_.field_generators(),
descriptor_, sorted_fields.get());
if (descriptor_->options().message_set_wire_format()) {
printer->Print("getUnknownFields().writeAsMessageSetTo(output);\n");
} else {
printer->Print("getUnknownFields().writeTo(output);\n");
}
printer->Outdent();
printer->Print(
"}\n"
"\n"
"@java.lang.Override\n"
"public int getSerializedSize() {\n"
" int size = memoizedSize;\n"
" if (size != -1) return size;\n"
"\n");
printer->Indent();
printer->Print("size = 0;\n");
for (int i = 0; i < descriptor_->field_count(); i++) {
field_generators_.get(sorted_fields[i]).GenerateSerializedSizeCode(printer);
}
if (descriptor_->extension_range_count() > 0) {
if (descriptor_->options().message_set_wire_format()) {
printer->Print("size += extensionsSerializedSizeAsMessageSet();\n");
} else {
printer->Print("size += extensionsSerializedSize();\n");
}
}
if (descriptor_->options().message_set_wire_format()) {
printer->Print(
"size += getUnknownFields().getSerializedSizeAsMessageSet();\n");
} else {
printer->Print("size += getUnknownFields().getSerializedSize();\n");
}
printer->Print(
"memoizedSize = size;\n"
"return size;\n");
printer->Outdent();
printer->Print(
"}\n"
"\n");
}
void ImmutableMessageGenerator::GenerateParseFromMethods(io::Printer* printer) {
// Note: These are separate from GenerateMessageSerializationMethods()
// because they need to be generated even for messages that are optimized
// for code size.
printer->Print(
"public static $classname$ parseFrom(\n"
" java.nio.ByteBuffer data)\n"
" throws com.google.protobuf.InvalidProtocolBufferException {\n"
" return PARSER.parseFrom(data);\n"
"}\n"
"public static $classname$ parseFrom(\n"
" java.nio.ByteBuffer data,\n"
" com.google.protobuf.ExtensionRegistryLite extensionRegistry)\n"
" throws com.google.protobuf.InvalidProtocolBufferException {\n"
" return PARSER.parseFrom(data, extensionRegistry);\n"
"}\n"
"public static $classname$ parseFrom(\n"
" com.google.protobuf.ByteString data)\n"
" throws com.google.protobuf.InvalidProtocolBufferException {\n"
" return PARSER.parseFrom(data);\n"
"}\n"
"public static $classname$ parseFrom(\n"
" com.google.protobuf.ByteString data,\n"
" com.google.protobuf.ExtensionRegistryLite extensionRegistry)\n"
" throws com.google.protobuf.InvalidProtocolBufferException {\n"
" return PARSER.parseFrom(data, extensionRegistry);\n"
"}\n"
"public static $classname$ parseFrom(byte[] data)\n"
" throws com.google.protobuf.InvalidProtocolBufferException {\n"
" return PARSER.parseFrom(data);\n"
"}\n"
"public static $classname$ parseFrom(\n"
" byte[] data,\n"
" com.google.protobuf.ExtensionRegistryLite extensionRegistry)\n"
" throws com.google.protobuf.InvalidProtocolBufferException {\n"
" return PARSER.parseFrom(data, extensionRegistry);\n"
"}\n"
"public static $classname$ parseFrom(java.io.InputStream input)\n"
" throws java.io.IOException {\n"
" return com.google.protobuf.GeneratedMessage\n"
" .parseWithIOException(PARSER, input);\n"
"}\n"
"public static $classname$ parseFrom(\n"
" java.io.InputStream input,\n"
" com.google.protobuf.ExtensionRegistryLite extensionRegistry)\n"
" throws java.io.IOException {\n"
" return com.google.protobuf.GeneratedMessage\n"
" .parseWithIOException(PARSER, input, extensionRegistry);\n"
"}\n"
"$parsedelimitedreturnannotation$\n"
"public static $classname$ parseDelimitedFrom(java.io.InputStream "
"input)\n"
" throws java.io.IOException {\n"
" return com.google.protobuf.GeneratedMessage\n"
" .parseDelimitedWithIOException(PARSER, input);\n"
"}\n"
"$parsedelimitedreturnannotation$\n"
"public static $classname$ parseDelimitedFrom(\n"
" java.io.InputStream input,\n"
" com.google.protobuf.ExtensionRegistryLite extensionRegistry)\n"
" throws java.io.IOException {\n"
" return com.google.protobuf.GeneratedMessage\n"
" .parseDelimitedWithIOException(PARSER, input, "
"extensionRegistry);\n"
"}\n"
"public static $classname$ parseFrom(\n"
" com.google.protobuf.CodedInputStream input)\n"
" throws java.io.IOException {\n"
" return com.google.protobuf.GeneratedMessage\n"
" .parseWithIOException(PARSER, input);\n"
"}\n"
"public static $classname$ parseFrom(\n"
" com.google.protobuf.CodedInputStream input,\n"
" com.google.protobuf.ExtensionRegistryLite extensionRegistry)\n"
" throws java.io.IOException {\n"
" return com.google.protobuf.GeneratedMessage\n"
" .parseWithIOException(PARSER, input, extensionRegistry);\n"
"}\n"
"\n",
"classname", name_resolver_->GetImmutableClassName(descriptor_),
"parsedelimitedreturnannotation",
context_->options().opensource_runtime
? ""
: "@com.google.protobuf.Internal.ProtoMethodMayReturnNull");
}
// ===================================================================
void ImmutableMessageGenerator::GenerateBuilder(io::Printer* printer) {
// LITE_RUNTIME implements this at the GeneratedMessageLite level.
printer->Print(
"@java.lang.Override\n"
"public Builder newBuilderForType() { return newBuilder(); }\n");
printer->Print(
"public static Builder newBuilder() {\n"
" return DEFAULT_INSTANCE.toBuilder();\n"
"}\n"
"public static Builder newBuilder($classname$ prototype) {\n"
" return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);\n"
"}\n"
"@java.lang.Override\n"
"public Builder toBuilder() {\n"
" return this == DEFAULT_INSTANCE\n"
" ? new Builder() : new Builder().mergeFrom(this);\n"
"}\n"
"\n",
"classname", name_resolver_->GetImmutableClassName(descriptor_));
printer->Print(
"@java.lang.Override\n"
"protected Builder newBuilderForType(\n"
" com.google.protobuf.GeneratedMessage.BuilderParent parent) {\n"
" Builder builder = new Builder(parent);\n"
" return builder;\n"
"}\n");
MessageBuilderGenerator builderGenerator(descriptor_, context_);
builderGenerator.Generate(printer);
}
void ImmutableMessageGenerator::GenerateDescriptorMethods(
io::Printer* printer) {
if (!descriptor_->options().no_standard_descriptor_accessor()) {
printer->Print(
"public static final com.google.protobuf.Descriptors.Descriptor\n"
" getDescriptor() {\n"
" return $fileclass$.internal_$identifier$_descriptor;\n"
"}\n"
"\n",
"fileclass", name_resolver_->GetImmutableClassName(descriptor_->file()),
"identifier", UniqueFileScopeIdentifier(descriptor_));
}
std::vector<const FieldDescriptor*> map_fields;
for (int i = 0; i < descriptor_->field_count(); i++) {
const FieldDescriptor* field = descriptor_->field(i);
if (GetJavaType(field) == JAVATYPE_MESSAGE &&
IsMapEntry(field->message_type())) {
map_fields.push_back(field);
}
}
if (!map_fields.empty()) {
printer->Print(
"@SuppressWarnings({\"rawtypes\"})\n"
"@java.lang.Override\n"
"protected com.google.protobuf.MapFieldReflectionAccessor "
"internalGetMapFieldReflection(\n"
" int number) {\n"
" switch (number) {\n");
printer->Indent();
printer->Indent();
for (int i = 0; i < map_fields.size(); ++i) {
const FieldDescriptor* field = map_fields[i];
const FieldGeneratorInfo* info = context_->GetFieldGeneratorInfo(field);
printer->Print(
"case $number$:\n"
" return internalGet$capitalized_name$();\n",
"number", absl::StrCat(field->number()), "capitalized_name",
info->capitalized_name);
}
printer->Print(
"default:\n"
" throw new RuntimeException(\n"
" \"Invalid map field number: \" + number);\n");
printer->Outdent();
printer->Outdent();
printer->Print(
" }\n"
"}\n");
}
printer->Print(
"@java.lang.Override\n"
"protected com.google.protobuf.GeneratedMessage.FieldAccessorTable\n"
" internalGetFieldAccessorTable() {\n"
" return $fileclass$.internal_$identifier$_fieldAccessorTable\n"
" .ensureFieldAccessorsInitialized(\n"
" $classname$.class, $classname$.Builder.class);\n"
"}\n"
"\n",
"classname", name_resolver_->GetImmutableClassName(descriptor_),
"fileclass", name_resolver_->GetImmutableClassName(descriptor_->file()),
"identifier", UniqueFileScopeIdentifier(descriptor_));
}
// ===================================================================
void ImmutableMessageGenerator::GenerateIsInitialized(io::Printer* printer) {
// Memoizes whether the protocol buffer is fully initialized (has all
// required fields). -1 means not yet computed. 0 means false and 1 means
// true.
printer->Print("private byte memoizedIsInitialized = -1;\n");
printer->Print(
"@java.lang.Override\n"
"public final boolean isInitialized() {\n");
printer->Indent();
// Don't directly compare to -1 to avoid an Android x86 JIT bug.
printer->Print(
"byte isInitialized = memoizedIsInitialized;\n"
"if (isInitialized == 1) return true;\n"
"if (isInitialized == 0) return false;\n"
"\n");
// Check that all required fields in this message are set.
// TODO: We can optimize this when we switch to putting all the
// "has" fields into a single bitfield.
for (int i = 0; i < descriptor_->field_count(); i++) {
const FieldDescriptor* field = descriptor_->field(i);
const FieldGeneratorInfo* info = context_->GetFieldGeneratorInfo(field);
if (field->is_required()) {
printer->Print(
"if (!has$name$()) {\n"
" memoizedIsInitialized = 0;\n"
" return false;\n"
"}\n",
"name", info->capitalized_name);
}
}
// Now check that all embedded messages are initialized.
for (int i = 0; i < descriptor_->field_count(); i++) {
const FieldDescriptor* field = descriptor_->field(i);
const FieldGeneratorInfo* info = context_->GetFieldGeneratorInfo(field);
if (GetJavaType(field) == JAVATYPE_MESSAGE &&
HasRequiredFields(field->message_type())) {
switch (field->label()) {
case FieldDescriptor::LABEL_REQUIRED:
printer->Print(
"if (!get$name$().isInitialized()) {\n"
" memoizedIsInitialized = 0;\n"
" return false;\n"
"}\n",
"type",
name_resolver_->GetImmutableClassName(field->message_type()),
"name", info->capitalized_name);
break;
case FieldDescriptor::LABEL_OPTIONAL:
printer->Print(
"if (has$name$()) {\n"
" if (!get$name$().isInitialized()) {\n"
" memoizedIsInitialized = 0;\n"
" return false;\n"
" }\n"
"}\n",
"name", info->capitalized_name);
break;
case FieldDescriptor::LABEL_REPEATED:
if (IsMapEntry(field->message_type())) {
printer->Print(
"for ($type$ item : get$name$Map().values()) {\n"
" if (!item.isInitialized()) {\n"
" memoizedIsInitialized = 0;\n"
" return false;\n"
" }\n"
"}\n",
"type",
MapValueImmutableClassdName(field->message_type(),
name_resolver_),
"name", info->capitalized_name);
} else {
printer->Print(
"for (int i = 0; i < get$name$Count(); i++) {\n"
" if (!get$name$(i).isInitialized()) {\n"
" memoizedIsInitialized = 0;\n"
" return false;\n"
" }\n"
"}\n",
"type",
name_resolver_->GetImmutableClassName(field->message_type()),
"name", info->capitalized_name);
}
break;
}
}
}
if (descriptor_->extension_range_count() > 0) {
printer->Print(
"if (!extensionsAreInitialized()) {\n"
" memoizedIsInitialized = 0;\n"
" return false;\n"
"}\n");
}
printer->Outdent();
printer->Print(" memoizedIsInitialized = 1;\n");
printer->Print(
" return true;\n"
"}\n"
"\n");
}
// ===================================================================
void ImmutableMessageGenerator::GenerateEqualsAndHashCode(
io::Printer* printer) {
printer->Print(
"@java.lang.Override\n"
"public boolean equals(");
if (!context_->options().opensource_runtime) {
printer->Print(
"@com.google.protobuf.Internal.ProtoMethodAcceptsNullParameter\n");
}
printer->Print("final java.lang.Object obj) {\n");
printer->Indent();
printer->Print(
"if (obj == this) {\n"
" return true;\n"
"}\n"
"if (!(obj instanceof $classname$)) {\n"
// don't simply return false because mutable and immutable types
// can be equal
" return super.equals(obj);\n"
"}\n"
"$classname$ other = ($classname$) obj;\n"
"\n",
"classname", name_resolver_->GetImmutableClassName(descriptor_));
for (int i = 0; i < descriptor_->field_count(); i++) {
const FieldDescriptor* field = descriptor_->field(i);
if (!IsRealOneof(field)) {
const FieldGeneratorInfo* info = context_->GetFieldGeneratorInfo(field);
if (field->has_presence()) {
printer->Print(
"if (has$name$() != other.has$name$()) return false;\n"
"if (has$name$()) {\n",
"name", info->capitalized_name);
printer->Indent();
}
field_generators_.get(field).GenerateEqualsCode(printer);
if (field->has_presence()) {
printer->Outdent();
printer->Print("}\n");
}
}