diff options
Diffstat (limited to 'src/google/protobuf/compiler/java/java_message_builder.cc')
-rw-r--r-- | src/google/protobuf/compiler/java/java_message_builder.cc | 661 |
1 files changed, 661 insertions, 0 deletions
diff --git a/src/google/protobuf/compiler/java/java_message_builder.cc b/src/google/protobuf/compiler/java/java_message_builder.cc new file mode 100644 index 00000000..72694119 --- /dev/null +++ b/src/google/protobuf/compiler/java/java_message_builder.cc @@ -0,0 +1,661 @@ +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. All rights reserved. +// https://developers.google.com/protocol-buffers/ +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// Author: dweis@google.com (Daniel Weis) +// Based on original Protocol Buffers design by +// Sanjay Ghemawat, Jeff Dean, and others. + +#include <google/protobuf/compiler/java/java_message_builder.h> + +#include <algorithm> +#include <google/protobuf/stubs/hash.h> +#include <map> +#include <memory> +#ifndef _SHARED_PTR_H +#include <google/protobuf/stubs/shared_ptr.h> +#endif +#include <vector> + +#include <google/protobuf/compiler/java/java_context.h> +#include <google/protobuf/compiler/java/java_doc_comment.h> +#include <google/protobuf/compiler/java/java_enum.h> +#include <google/protobuf/compiler/java/java_extension.h> +#include <google/protobuf/compiler/java/java_generator_factory.h> +#include <google/protobuf/compiler/java/java_helpers.h> +#include <google/protobuf/compiler/java/java_name_resolver.h> +#include <google/protobuf/io/coded_stream.h> +#include <google/protobuf/io/printer.h> +#include <google/protobuf/descriptor.pb.h> +#include <google/protobuf/wire_format.h> +#include <google/protobuf/stubs/strutil.h> +#include <google/protobuf/stubs/substitute.h> + +namespace google { +namespace protobuf { +namespace compiler { +namespace java { + +namespace { +bool GenerateHasBits(const Descriptor* descriptor) { + return SupportFieldPresence(descriptor->file()) || + HasRepeatedFields(descriptor); +} + +string MapValueImmutableClassdName(const Descriptor* descriptor, + ClassNameResolver* name_resolver) { + const FieldDescriptor* value_field = descriptor->FindFieldByName("value"); + GOOGLE_CHECK_EQ(FieldDescriptor::TYPE_MESSAGE, value_field->type()); + return name_resolver->GetImmutableClassName(value_field->message_type()); +} +} // namespace + +MessageBuilderGenerator::MessageBuilderGenerator( + const Descriptor* descriptor, Context* context) + : descriptor_(descriptor), context_(context), + name_resolver_(context->GetNameResolver()), + field_generators_(descriptor, context_) { + GOOGLE_CHECK_NE( + FileOptions::LITE_RUNTIME, descriptor->file()->options().optimize_for()); +} + +MessageBuilderGenerator::~MessageBuilderGenerator() {} + +void MessageBuilderGenerator:: +Generate(io::Printer* printer) { + WriteMessageDocComment(printer, descriptor_); + if (descriptor_->extension_range_count() > 0) { + printer->Print( + "public static final class Builder extends\n" + " com.google.protobuf.GeneratedMessage.ExtendableBuilder<\n" + " $classname$, Builder> implements\n" + " $extra_interfaces$\n" + " $classname$OrBuilder {\n", + "classname", name_resolver_->GetImmutableClassName(descriptor_), + "extra_interfaces", ExtraBuilderInterfaces(descriptor_)); + } else { + printer->Print( + "public static final class Builder extends\n" + " com.google.protobuf.GeneratedMessage.Builder<Builder> implements\n" + " $extra_interfaces$\n" + " $classname$OrBuilder {\n", + "classname", name_resolver_->GetImmutableClassName(descriptor_), + "extra_interfaces", ExtraBuilderInterfaces(descriptor_)); + } + printer->Indent(); + + GenerateDescriptorMethods(printer); + GenerateCommonBuilderMethods(printer); + + if (HasGeneratedMethods(descriptor_)) { + GenerateIsInitialized(printer); + GenerateBuilderParsingMethods(printer); + } + + // oneof + map<string, string> vars; + for (int i = 0; i < descriptor_->oneof_decl_count(); i++) { + vars["oneof_name"] = context_->GetOneofGeneratorInfo( + descriptor_->oneof_decl(i))->name; + vars["oneof_capitalized_name"] = context_->GetOneofGeneratorInfo( + descriptor_->oneof_decl(i))->capitalized_name; + vars["oneof_index"] = SimpleItoa(descriptor_->oneof_decl(i)->index()); + // oneofCase_ and oneof_ + printer->Print(vars, + "private int $oneof_name$Case_ = 0;\n" + "private java.lang.Object $oneof_name$_;\n"); + // oneofCase() and clearOneof() + printer->Print(vars, + "public $oneof_capitalized_name$Case\n" + " get$oneof_capitalized_name$Case() {\n" + " return $oneof_capitalized_name$Case.valueOf(\n" + " $oneof_name$Case_);\n" + "}\n" + "\n" + "public Builder clear$oneof_capitalized_name$() {\n" + " $oneof_name$Case_ = 0;\n" + " $oneof_name$_ = null;\n"); + printer->Print(" onChanged();\n"); + printer->Print( + " return this;\n" + "}\n" + "\n"); + } + + if (GenerateHasBits(descriptor_)) { + // Integers for bit fields. + int totalBits = 0; + for (int i = 0; i < descriptor_->field_count(); i++) { + totalBits += field_generators_.get(descriptor_->field(i)) + .GetNumBitsForBuilder(); + } + 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)); + } + } + + for (int i = 0; i < descriptor_->field_count(); i++) { + printer->Print("\n"); + field_generators_.get(descriptor_->field(i)) + .GenerateBuilderMembers(printer); + } + + if (!PreserveUnknownFields(descriptor_)) { + printer->Print( + "public final Builder setUnknownFields(\n" + " final com.google.protobuf.UnknownFieldSet unknownFields) {\n" + " return this;\n" + "}\n" + "\n" + "public final Builder mergeUnknownFields(\n" + " final com.google.protobuf.UnknownFieldSet unknownFields) {\n" + " return this;\n" + "}\n" + "\n"); + } + + printer->Print( + "\n" + "// @@protoc_insertion_point(builder_scope:$full_name$)\n", + "full_name", descriptor_->full_name()); + + printer->Outdent(); + printer->Print("}\n"); +} + +// =================================================================== + +void MessageBuilderGenerator:: +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_)); + } + 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" + "protected com.google.protobuf.MapField internalGetMapField(\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", SimpleItoa(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( + "@SuppressWarnings({\"rawtypes\"})\n" + "protected com.google.protobuf.MapField internalGetMutableMapField(\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 internalGetMutable$capitalized_name$();\n", + "number", SimpleItoa(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( + "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 MessageBuilderGenerator:: +GenerateCommonBuilderMethods(io::Printer* printer) { + printer->Print( + "// Construct using $classname$.newBuilder()\n" + "private Builder() {\n" + " maybeForceBuilderInitialization();\n" + "}\n" + "\n", + "classname", name_resolver_->GetImmutableClassName(descriptor_)); + + printer->Print( + "private Builder(\n" + " com.google.protobuf.GeneratedMessage.BuilderParent parent) {\n" + " super(parent);\n" + " maybeForceBuilderInitialization();\n" + "}\n", + "classname", name_resolver_->GetImmutableClassName(descriptor_)); + + printer->Print( + "private void maybeForceBuilderInitialization() {\n" + " if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {\n"); + + printer->Indent(); + printer->Indent(); + for (int i = 0; i < descriptor_->field_count(); i++) { + if (!descriptor_->field(i)->containing_oneof()) { + field_generators_.get(descriptor_->field(i)) + .GenerateFieldBuilderInitializationCode(printer); + } + } + printer->Outdent(); + printer->Outdent(); + + printer->Print( + " }\n" + "}\n"); + + printer->Print( + "public Builder clear() {\n" + " super.clear();\n"); + + printer->Indent(); + + for (int i = 0; i < descriptor_->field_count(); i++) { + if (!descriptor_->field(i)->containing_oneof()) { + field_generators_.get(descriptor_->field(i)) + .GenerateBuilderClearCode(printer); + } + } + + for (int i = 0; i < descriptor_->oneof_decl_count(); i++) { + printer->Print( + "$oneof_name$Case_ = 0;\n" + "$oneof_name$_ = null;\n", + "oneof_name", context_->GetOneofGeneratorInfo( + descriptor_->oneof_decl(i))->name); + } + + printer->Outdent(); + + printer->Print( + " return this;\n" + "}\n" + "\n"); + + printer->Print( + "public com.google.protobuf.Descriptors.Descriptor\n" + " getDescriptorForType() {\n" + " return $fileclass$.internal_$identifier$_descriptor;\n" + "}\n" + "\n", + "fileclass", name_resolver_->GetImmutableClassName(descriptor_->file()), + "identifier", UniqueFileScopeIdentifier(descriptor_)); + + // LITE runtime implements this in GeneratedMessageLite. + printer->Print( + "public $classname$ getDefaultInstanceForType() {\n" + " return $classname$.getDefaultInstance();\n" + "}\n" + "\n", + "classname", name_resolver_->GetImmutableClassName(descriptor_)); + + printer->Print( + "public $classname$ build() {\n" + " $classname$ result = buildPartial();\n" + " if (!result.isInitialized()) {\n" + " throw newUninitializedMessageException(result);\n" + " }\n" + " return result;\n" + "}\n" + "\n", + "classname", name_resolver_->GetImmutableClassName(descriptor_)); + + printer->Print( + "public $classname$ buildPartial() {\n" + " $classname$ result = new $classname$(this);\n", + "classname", name_resolver_->GetImmutableClassName(descriptor_)); + + printer->Indent(); + + int totalBuilderBits = 0; + int totalMessageBits = 0; + for (int i = 0; i < descriptor_->field_count(); i++) { + const ImmutableFieldGenerator& field = + field_generators_.get(descriptor_->field(i)); + totalBuilderBits += field.GetNumBitsForBuilder(); + totalMessageBits += field.GetNumBitsForMessage(); + } + int totalBuilderInts = (totalBuilderBits + 31) / 32; + int totalMessageInts = (totalMessageBits + 31) / 32; + + if (GenerateHasBits(descriptor_)) { + // Local vars for from and to bit fields to avoid accessing the builder and + // message over and over for these fields. Seems to provide a slight + // perforamance improvement in micro benchmark and this is also what proto1 + // code does. + for (int i = 0; i < totalBuilderInts; i++) { + printer->Print("int from_$bit_field_name$ = $bit_field_name$;\n", + "bit_field_name", GetBitFieldName(i)); + } + for (int i = 0; i < totalMessageInts; i++) { + printer->Print("int to_$bit_field_name$ = 0;\n", + "bit_field_name", GetBitFieldName(i)); + } + } + + // Output generation code for each field. + for (int i = 0; i < descriptor_->field_count(); i++) { + field_generators_.get(descriptor_->field(i)).GenerateBuildingCode(printer); + } + + if (GenerateHasBits(descriptor_)) { + // Copy the bit field results to the generated message + for (int i = 0; i < totalMessageInts; i++) { + printer->Print("result.$bit_field_name$ = to_$bit_field_name$;\n", + "bit_field_name", GetBitFieldName(i)); + } + } + + for (int i = 0; i < descriptor_->oneof_decl_count(); i++) { + printer->Print("result.$oneof_name$Case_ = $oneof_name$Case_;\n", + "oneof_name", context_->GetOneofGeneratorInfo( + descriptor_->oneof_decl(i))->name); + } + + printer->Outdent(); + + printer->Print( + " onBuilt();\n"); + + printer->Print( + " return result;\n" + "}\n" + "\n", + "classname", name_resolver_->GetImmutableClassName(descriptor_)); + + // ----------------------------------------------------------------- + + if (HasGeneratedMethods(descriptor_)) { + printer->Print( + "public Builder mergeFrom(com.google.protobuf.Message other) {\n" + " if (other instanceof $classname$) {\n" + " return mergeFrom(($classname$)other);\n" + " } else {\n" + " super.mergeFrom(other);\n" + " return this;\n" + " }\n" + "}\n" + "\n", + "classname", name_resolver_->GetImmutableClassName(descriptor_)); + + printer->Print( + "public Builder mergeFrom($classname$ other) {\n" + // Optimization: If other is the default instance, we know none of its + // fields are set so we can skip the merge. + " if (other == $classname$.getDefaultInstance()) return this;\n", + "classname", name_resolver_->GetImmutableClassName(descriptor_)); + printer->Indent(); + + for (int i = 0; i < descriptor_->field_count(); i++) { + if (!descriptor_->field(i)->containing_oneof()) { + field_generators_.get( + descriptor_->field(i)).GenerateMergingCode(printer); + } + } + + // Merge oneof fields. + for (int i = 0; i < descriptor_->oneof_decl_count(); ++i) { + printer->Print( + "switch (other.get$oneof_capitalized_name$Case()) {\n", + "oneof_capitalized_name", + context_->GetOneofGeneratorInfo( + descriptor_->oneof_decl(i))->capitalized_name); + printer->Indent(); + for (int j = 0; j < descriptor_->oneof_decl(i)->field_count(); j++) { + const FieldDescriptor* field = descriptor_->oneof_decl(i)->field(j); + printer->Print( + "case $field_name$: {\n", + "field_name", + ToUpper(field->name())); + printer->Indent(); + field_generators_.get(field).GenerateMergingCode(printer); + printer->Print( + "break;\n"); + printer->Outdent(); + printer->Print( + "}\n"); + } + printer->Print( + "case $cap_oneof_name$_NOT_SET: {\n" + " break;\n" + "}\n", + "cap_oneof_name", + ToUpper(context_->GetOneofGeneratorInfo( + descriptor_->oneof_decl(i))->name)); + printer->Outdent(); + printer->Print( + "}\n"); + } + + printer->Outdent(); + + // if message type has extensions + if (descriptor_->extension_range_count() > 0) { + printer->Print( + " this.mergeExtensionFields(other);\n"); + } + + if (PreserveUnknownFields(descriptor_)) { + printer->Print( + " this.mergeUnknownFields(other.unknownFields);\n"); + } + + printer->Print( + " onChanged();\n"); + + printer->Print( + " return this;\n" + "}\n" + "\n"); + } +} + +// =================================================================== + +void MessageBuilderGenerator:: +GenerateBuilderParsingMethods(io::Printer* printer) { + printer->Print( + "public Builder mergeFrom(\n" + " com.google.protobuf.CodedInputStream input,\n" + " com.google.protobuf.ExtensionRegistryLite extensionRegistry)\n" + " throws java.io.IOException {\n" + " $classname$ parsedMessage = null;\n" + " try {\n" + " parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);\n" + " } catch (com.google.protobuf.InvalidProtocolBufferException e) {\n" + " parsedMessage = ($classname$) e.getUnfinishedMessage();\n" + " throw e;\n" + " } finally {\n" + " if (parsedMessage != null) {\n" + " mergeFrom(parsedMessage);\n" + " }\n" + " }\n" + " return this;\n" + "}\n", + "classname", name_resolver_->GetImmutableClassName(descriptor_)); +} + +// =================================================================== + +void MessageBuilderGenerator::GenerateIsInitialized( + io::Printer* printer) { + printer->Print( + "public final boolean isInitialized() {\n"); + printer->Indent(); + + // Check that all required fields in this message are set. + // TODO(kenton): 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" + " 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" + " return false;\n" + "}\n", + "type", name_resolver_->GetImmutableClassName( + field->message_type()), + "name", info->capitalized_name); + break; + case FieldDescriptor::LABEL_OPTIONAL: + if (!SupportFieldPresence(descriptor_->file()) && + field->containing_oneof() != NULL) { + const OneofDescriptor* oneof = field->containing_oneof(); + const OneofGeneratorInfo* oneof_info = + context_->GetOneofGeneratorInfo(oneof); + printer->Print( + "if ($oneof_name$Case_ == $field_number$) {\n", + "oneof_name", oneof_info->name, + "field_number", SimpleItoa(field->number())); + } else { + printer->Print( + "if (has$name$()) {\n", + "name", info->capitalized_name); + } + printer->Print( + " if (!get$name$().isInitialized()) {\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$name$().values()) {\n" + " if (!item.isInitialized()) {\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" + " 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" + " return false;\n" + "}\n"); + } + + printer->Outdent(); + + printer->Print( + " return true;\n" + "}\n" + "\n"); +} + +// =================================================================== + +} // namespace java +} // namespace compiler +} // namespace protobuf +} // namespace google |