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// 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.
#include <compiler/java/java_context.h>
#include <compiler/java/java_field.h>
#include <compiler/java/java_helpers.h>
#include <compiler/java/java_name_resolver.h>
#include <descriptor.h>
#include <stubs/strutil.h>
#include <stubs/map_util.h>
namespace google {
namespace protobuf {
namespace compiler {
namespace java {
Context::Context(const FileDescriptor* file, const Options& options)
: name_resolver_(new ClassNameResolver), options_(options) {
InitializeFieldGeneratorInfo(file);
}
Context::~Context() {}
ClassNameResolver* Context::GetNameResolver() const {
return name_resolver_.get();
}
namespace {
// Whether two fields have conflicting accessors (assuming name1 and name2
// are different). name1 and name2 are field1 and field2's camel-case name
// respectively.
bool IsConflicting(const FieldDescriptor* field1, const std::string& name1,
const FieldDescriptor* field2, const std::string& name2,
std::string* info) {
if (field1->is_repeated()) {
if (field2->is_repeated()) {
// Both fields are repeated.
return false;
} else {
// field1 is repeated, and field2 is not.
if (name1 + "Count" == name2) {
*info = "both repeated field \"" + field1->name() + "\" and singular " +
"field \"" + field2->name() + "\" generate the method \"" +
"get" + name1 + "Count()\"";
return true;
}
if (name1 + "List" == name2) {
*info = "both repeated field \"" + field1->name() + "\" and singular " +
"field \"" + field2->name() + "\" generate the method \"" +
"get" + name1 + "List()\"";
return true;
}
// Well, there are obviously many more conflicting cases, but it probably
// doesn't worth the effort to exhaust all of them because they rarely
// happen and as we are continuing adding new methods/changing existing
// methods the number of different conflicting cases will keep growing.
// We can just add more cases here when they are found in the real world.
return false;
}
} else {
if (field2->is_repeated()) {
return IsConflicting(field2, name2, field1, name1, info);
} else {
// None of the two fields are repeated.
return false;
}
}
}
} // namespace
void Context::InitializeFieldGeneratorInfo(const FileDescriptor* file) {
for (int i = 0; i < file->message_type_count(); ++i) {
InitializeFieldGeneratorInfoForMessage(file->message_type(i));
}
}
void Context::InitializeFieldGeneratorInfoForMessage(
const Descriptor* message) {
for (int i = 0; i < message->nested_type_count(); ++i) {
InitializeFieldGeneratorInfoForMessage(message->nested_type(i));
}
std::vector<const FieldDescriptor*> fields;
fields.reserve(message->field_count());
for (int i = 0; i < message->field_count(); ++i) {
fields.push_back(message->field(i));
}
InitializeFieldGeneratorInfoForFields(fields);
for (int i = 0; i < message->oneof_decl_count(); ++i) {
const OneofDescriptor* oneof = message->oneof_decl(i);
OneofGeneratorInfo info;
info.name = UnderscoresToCamelCase(oneof->name(), false);
info.capitalized_name = UnderscoresToCamelCase(oneof->name(), true);
oneof_generator_info_map_[oneof] = info;
}
}
void Context::InitializeFieldGeneratorInfoForFields(
const std::vector<const FieldDescriptor*>& fields) {
// Find out all fields that conflict with some other field in the same
// message.
std::vector<bool> is_conflict(fields.size());
std::vector<std::string> conflict_reason(fields.size());
for (int i = 0; i < fields.size(); ++i) {
const FieldDescriptor* field = fields[i];
const std::string& name = UnderscoresToCapitalizedCamelCase(field);
for (int j = i + 1; j < fields.size(); ++j) {
const FieldDescriptor* other = fields[j];
const std::string& other_name = UnderscoresToCapitalizedCamelCase(other);
if (name == other_name) {
is_conflict[i] = is_conflict[j] = true;
conflict_reason[i] = conflict_reason[j] =
"capitalized name of field \"" + field->name() +
"\" conflicts with field \"" + other->name() + "\"";
} else if (IsConflicting(field, name, other, other_name,
&conflict_reason[j])) {
is_conflict[i] = is_conflict[j] = true;
conflict_reason[i] = conflict_reason[j];
}
}
if (is_conflict[i]) {
GOOGLE_LOG(WARNING) << "field \"" << field->full_name() << "\" is conflicting "
<< "with another field: " << conflict_reason[i];
}
}
for (int i = 0; i < fields.size(); ++i) {
const FieldDescriptor* field = fields[i];
FieldGeneratorInfo info;
info.name = CamelCaseFieldName(field);
info.capitalized_name = UnderscoresToCapitalizedCamelCase(field);
// For fields conflicting with some other fields, we append the field
// number to their field names in generated code to avoid conflicts.
if (is_conflict[i]) {
info.name += StrCat(field->number());
info.capitalized_name += StrCat(field->number());
info.disambiguated_reason = conflict_reason[i];
}
field_generator_info_map_[field] = info;
}
}
const FieldGeneratorInfo* Context::GetFieldGeneratorInfo(
const FieldDescriptor* field) const {
const FieldGeneratorInfo* result =
FindOrNull(field_generator_info_map_, field);
if (result == NULL) {
GOOGLE_LOG(FATAL) << "Can not find FieldGeneratorInfo for field: "
<< field->full_name();
}
return result;
}
const OneofGeneratorInfo* Context::GetOneofGeneratorInfo(
const OneofDescriptor* oneof) const {
const OneofGeneratorInfo* result =
FindOrNull(oneof_generator_info_map_, oneof);
if (result == NULL) {
GOOGLE_LOG(FATAL) << "Can not find OneofGeneratorInfo for oneof: "
<< oneof->name();
}
return result;
}
// Does this message class have generated parsing, serialization, and other
// standard methods for which reflection-based fallback implementations exist?
bool Context::HasGeneratedMethods(const Descriptor* descriptor) const {
return options_.enforce_lite ||
descriptor->file()->options().optimize_for() != FileOptions::CODE_SIZE;
}
} // namespace java
} // namespace compiler
} // namespace protobuf
} // namespace google
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