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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// http://code.google.com/p/protobuf/
//
// 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: kenton@google.com (Kenton Varda)
// Based on original Protocol Buffers design by
// Sanjay Ghemawat, Jeff Dean, and others.
#include <algorithm>
#include <google/protobuf/stubs/hash.h>
#include <google/protobuf/compiler/javanano/javanano_message.h>
#include <google/protobuf/compiler/javanano/javanano_enum.h>
#include <google/protobuf/compiler/javanano/javanano_helpers.h>
#include <google/protobuf/stubs/strutil.h>
#include <google/protobuf/io/printer.h>
#include <google/protobuf/io/coded_stream.h>
#include <google/protobuf/wire_format.h>
#include <google/protobuf/descriptor.pb.h>
namespace google {
namespace protobuf {
namespace compiler {
namespace javanano {
using internal::WireFormat;
using internal::WireFormatLite;
namespace {
void PrintFieldComment(io::Printer* printer, const FieldDescriptor* field) {
// Print the field's proto-syntax definition as a comment. We don't want to
// print group bodies so we cut off after the first line.
string def = field->DebugString();
printer->Print("// $def$\n",
"def", def.substr(0, def.find_first_of('\n')));
}
struct FieldOrderingByNumber {
inline bool operator()(const FieldDescriptor* a,
const FieldDescriptor* b) const {
return a->number() < b->number();
}
};
// Sort the fields of the given Descriptor by number into a new[]'d array
// and return it.
const FieldDescriptor** SortFieldsByNumber(const Descriptor* descriptor) {
const FieldDescriptor** fields =
new const FieldDescriptor*[descriptor->field_count()];
for (int i = 0; i < descriptor->field_count(); i++) {
fields[i] = descriptor->field(i);
}
sort(fields, fields + descriptor->field_count(),
FieldOrderingByNumber());
return fields;
}
// Get an identifier that uniquely identifies this type within the file.
// This is used to declare static variables related to this type at the
// outermost file scope.
string UniqueFileScopeIdentifier(const Descriptor* descriptor) {
return "static_" + StringReplace(descriptor->full_name(), ".", "_", true);
}
} // namespace
// ===================================================================
MessageGenerator::MessageGenerator(const Descriptor* descriptor, const Params& params)
: params_(params),
descriptor_(descriptor),
field_generators_(descriptor, params) {
}
MessageGenerator::~MessageGenerator() {}
void MessageGenerator::GenerateStaticVariables(io::Printer* printer) {
// Generate static members for all nested types.
for (int i = 0; i < descriptor_->nested_type_count(); i++) {
// TODO(kenton): Reuse MessageGenerator objects?
MessageGenerator(descriptor_->nested_type(i), params_)
.GenerateStaticVariables(printer);
}
}
void MessageGenerator::GenerateStaticVariableInitializers(
io::Printer* printer) {
// Generate static member initializers for all nested types.
for (int i = 0; i < descriptor_->nested_type_count(); i++) {
// TODO(kenton): Reuse MessageGenerator objects?
MessageGenerator(descriptor_->nested_type(i), params_)
.GenerateStaticVariableInitializers(printer);
}
if (descriptor_->extension_count() != 0) {
GOOGLE_LOG(FATAL) << "Extensions not supported in NANO_RUNTIME\n";
}
}
void MessageGenerator::Generate(io::Printer* printer) {
bool is_own_file =
params_.java_multiple_files() || ((descriptor_->containing_type() == NULL)
&& !params_.has_java_outer_classname(descriptor_->file()->name()));
#if 0
GOOGLE_LOG(INFO) << "is_own_file=" << is_own_file;
GOOGLE_LOG(INFO) << "containing_type()=" << ((descriptor_->containing_type() == NULL) ? "NULL" : "not null");
GOOGLE_LOG(INFO) << "java_multiple_files()=" << params_.java_multiple_files();
GOOGLE_LOG(INFO) << "has_java_outer_classname()=" << params_.has_java_outer_classname(file_->name());
#endif
if ((descriptor_->extension_count() != 0)
|| (descriptor_->extension_range_count() != 0)) {
GOOGLE_LOG(FATAL) << "Extensions not supported in NANO_RUNTIME\n";
}
// Note: Fields (which will be emitted in the loop, below) may have the same names as fields in
// the inner or outer class. This causes Java warnings, but is not fatal, so we suppress those
// warnings here in the class declaration.
printer->Print(
"@SuppressWarnings(\"hiding\")\n"
"public $modifiers$ final class $classname$ extends\n"
" com.google.protobuf.nano.MessageNano {\n",
"modifiers", is_own_file ? "" : "static",
"classname", descriptor_->name());
printer->Indent();
printer->Print(
"public static final $classname$ EMPTY_ARRAY[] = {};\n"
"public $classname$() {}\n"
"\n",
"classname", descriptor_->name());
// Nested types and extensions
for (int i = 0; i < descriptor_->enum_type_count(); i++) {
EnumGenerator(descriptor_->enum_type(i), params_).Generate(printer);
}
for (int i = 0; i < descriptor_->nested_type_count(); i++) {
MessageGenerator(descriptor_->nested_type(i), params_).Generate(printer);
}
// Fields
for (int i = 0; i < descriptor_->field_count(); i++) {
PrintFieldComment(printer, descriptor_->field(i));
field_generators_.get(descriptor_->field(i)).GenerateMembers(printer);
printer->Print("\n");
}
GenerateClear(printer);
GenerateMessageSerializationMethods(printer);
GenerateMergeFromMethods(printer);
GenerateParseFromMethods(printer);
printer->Outdent();
printer->Print("}\n\n");
}
// ===================================================================
void MessageGenerator::
GenerateMessageSerializationMethods(io::Printer* printer) {
scoped_array<const FieldDescriptor*> sorted_fields(
SortFieldsByNumber(descriptor_));
if (descriptor_->extension_range_count() != 0) {
GOOGLE_LOG(FATAL) << "Extensions not supported in NANO_RUNTIME\n";
}
// writeTo only throws an exception if it contains one or more fields to write
if (descriptor_->field_count() > 0) {
printer->Print(
"@Override\n"
"public void writeTo(com.google.protobuf.nano.CodedOutputByteBufferNano output)\n"
" throws java.io.IOException {\n");
} else {
printer->Print(
"@Override\n"
"public void writeTo(com.google.protobuf.nano.CodedOutputByteBufferNano output) {\n");
}
printer->Indent();
// Output the fields in sorted order
for (int i = 0; i < descriptor_->field_count(); i++) {
GenerateSerializeOneField(printer, sorted_fields[i]);
}
printer->Outdent();
printer->Print(
"}\n"
"\n"
"private int cachedSize = -1;\n"
"@Override\n"
"public int getCachedSize() {\n"
" if (cachedSize < 0) {\n"
" // getSerializedSize sets cachedSize\n"
" getSerializedSize();\n"
" }\n"
" return cachedSize;\n"
"}\n"
"\n"
"@Override\n"
"public int getSerializedSize() {\n"
" int size = 0;\n");
printer->Indent();
for (int i = 0; i < descriptor_->field_count(); i++) {
field_generators_.get(sorted_fields[i]).GenerateSerializedSizeCode(printer);
}
printer->Outdent();
printer->Print(
" cachedSize = size;\n"
" return size;\n"
"}\n"
"\n");
}
void MessageGenerator::GenerateMergeFromMethods(io::Printer* printer) {
scoped_array<const FieldDescriptor*> sorted_fields(
SortFieldsByNumber(descriptor_));
printer->Print(
"@Override\n"
"public $classname$ mergeFrom(\n"
" com.google.protobuf.nano.CodedInputByteBufferNano input)\n"
" throws java.io.IOException {\n",
"classname", descriptor_->name());
printer->Indent();
printer->Print(
"while (true) {\n");
printer->Indent();
printer->Print(
"int tag = input.readTag();\n"
"switch (tag) {\n");
printer->Indent();
printer->Print(
"case 0:\n" // zero signals EOF / limit reached
" return this;\n"
"default: {\n"
" if (!com.google.protobuf.nano.WireFormatNano.parseUnknownField(input, tag)) {\n"
" return this;\n" // it's an endgroup tag
" }\n"
" break;\n"
"}\n");
for (int i = 0; i < descriptor_->field_count(); i++) {
const FieldDescriptor* field = sorted_fields[i];
uint32 tag = WireFormatLite::MakeTag(field->number(),
WireFormat::WireTypeForField(field));
printer->Print(
"case $tag$: {\n",
"tag", SimpleItoa(tag));
printer->Indent();
field_generators_.get(field).GenerateParsingCode(printer);
printer->Outdent();
printer->Print(
" break;\n"
"}\n");
}
printer->Outdent();
printer->Outdent();
printer->Outdent();
printer->Print(
" }\n" // switch (tag)
" }\n" // while (true)
"}\n"
"\n");
}
void MessageGenerator::
GenerateParseFromMethods(io::Printer* printer) {
bool is_own_file =
descriptor_->containing_type() == NULL;
// 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(byte[] data)\n"
" throws com.google.protobuf.nano.InvalidProtocolBufferNanoException {\n"
" return ($classname$) com.google.protobuf.nano.MessageNano.mergeFrom(new $classname$(), data);\n"
"}\n"
"\n"
"public $static$ $classname$ parseFrom(\n"
" com.google.protobuf.nano.CodedInputByteBufferNano input)\n"
" throws java.io.IOException {\n"
" return new $classname$().mergeFrom(input);\n"
"}\n"
"\n",
"static", (is_own_file ? "static" : ""),
"classname", descriptor_->name());
}
void MessageGenerator::GenerateSerializeOneField(
io::Printer* printer, const FieldDescriptor* field) {
field_generators_.get(field).GenerateSerializationCode(printer);
}
void MessageGenerator::GenerateClear(io::Printer* printer) {
printer->Print(
"public final $classname$ clear() {\n",
"classname", descriptor_->name());
printer->Indent();
// Call clear for all of the fields.
for (int i = 0; i < descriptor_->field_count(); i++) {
const FieldDescriptor* field = descriptor_->field(i);
if (field->type() == FieldDescriptor::TYPE_BYTES &&
!field->default_value_string().empty()) {
// Need to clone the default value because it is of a mutable
// type.
printer->Print(
"$name$ = $default$.clone();\n",
"name", UnderscoresToCamelCase(field),
"default", DefaultValue(params_, field));
} else {
printer->Print(
"$name$ = $default$;\n",
"name", UnderscoresToCamelCase(field),
"default", DefaultValue(params_, field));
}
}
printer->Outdent();
printer->Print(
" cachedSize = -1;\n"
" return this;\n"
"}\n"
"\n");
}
// ===================================================================
} // namespace javanano
} // namespace compiler
} // namespace protobuf
} // namespace google
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