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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.
// http://code.google.com/p/protobuf/
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Author: kenton@google.com (Kenton Varda)
// Based on original Protocol Buffers design by
// Sanjay Ghemawat, Jeff Dean, and others.
#include <vector>
#include <google/protobuf/compiler/java/java_helpers.h>
#include <google/protobuf/descriptor.pb.h>
#include <google/protobuf/stubs/strutil.h>
namespace google {
namespace protobuf {
namespace compiler {
namespace java {
const char kThickSeparator[] =
"// ===================================================================\n";
const char kThinSeparator[] =
"// -------------------------------------------------------------------\n";
namespace {
const char* kDefaultPackage = "";
const string& FieldName(const FieldDescriptor* field) {
// Groups are hacky: The name of the field is just the lower-cased name
// of the group type. In Java, though, we would like to retain the original
// capitalization of the type name.
if (field->type() == FieldDescriptor::TYPE_GROUP) {
return field->message_type()->name();
} else {
return field->name();
}
}
string UnderscoresToCamelCaseImpl(const string& input, bool cap_next_letter) {
string result;
// Note: I distrust ctype.h due to locales.
for (int i = 0; i < input.size(); i++) {
if ('a' <= input[i] && input[i] <= 'z') {
if (cap_next_letter) {
result += input[i] + ('A' - 'a');
} else {
result += input[i];
}
cap_next_letter = false;
} else if ('A' <= input[i] && input[i] <= 'Z') {
if (i == 0 && !cap_next_letter) {
// Force first letter to lower-case unless explicitly told to
// capitalize it.
result += input[i] + ('a' - 'A');
} else {
// Capital letters after the first are left as-is.
result += input[i];
}
cap_next_letter = false;
} else if ('0' <= input[i] && input[i] <= '9') {
result += input[i];
cap_next_letter = true;
} else {
cap_next_letter = true;
}
}
return result;
}
} // namespace
string UnderscoresToCamelCase(const FieldDescriptor* field) {
return UnderscoresToCamelCaseImpl(FieldName(field), false);
}
string UnderscoresToCapitalizedCamelCase(const FieldDescriptor* field) {
return UnderscoresToCamelCaseImpl(FieldName(field), true);
}
string UnderscoresToCamelCase(const MethodDescriptor* method) {
return UnderscoresToCamelCaseImpl(method->name(), false);
}
string StripProto(const string& filename) {
if (HasSuffixString(filename, ".protodevel")) {
return StripSuffixString(filename, ".protodevel");
} else {
return StripSuffixString(filename, ".proto");
}
}
string FileClassName(const FileDescriptor* file) {
if (file->options().has_java_outer_classname()) {
return file->options().java_outer_classname();
} else {
string basename;
string::size_type last_slash = file->name().find_last_of('/');
if (last_slash == string::npos) {
basename = file->name();
} else {
basename = file->name().substr(last_slash + 1);
}
return UnderscoresToCamelCaseImpl(StripProto(basename), true);
}
}
string FileJavaPackage(const FileDescriptor* file) {
if (file->options().has_java_package()) {
return file->options().java_package();
} else {
string result = kDefaultPackage;
if (!file->package().empty()) {
if (!result.empty()) result += '.';
result += file->package();
}
return result;
}
}
string ToJavaName(const string& full_name, const FileDescriptor* file) {
string result;
if (file->options().java_multiple_files()) {
result = FileJavaPackage(file);
} else {
result = ClassName(file);
}
if (!result.empty()) {
result += '.';
}
if (file->package().empty()) {
result += full_name;
} else {
// Strip the proto package from full_name since we've replaced it with
// the Java package.
result += full_name.substr(file->package().size() + 1);
}
return result;
}
string ClassName(const FileDescriptor* descriptor) {
string result = FileJavaPackage(descriptor);
if (!result.empty()) result += '.';
result += FileClassName(descriptor);
return result;
}
JavaType GetJavaType(FieldDescriptor::Type field_type) {
switch (field_type) {
case FieldDescriptor::TYPE_INT32:
case FieldDescriptor::TYPE_UINT32:
case FieldDescriptor::TYPE_SINT32:
case FieldDescriptor::TYPE_FIXED32:
case FieldDescriptor::TYPE_SFIXED32:
return JAVATYPE_INT;
case FieldDescriptor::TYPE_INT64:
case FieldDescriptor::TYPE_UINT64:
case FieldDescriptor::TYPE_SINT64:
case FieldDescriptor::TYPE_FIXED64:
case FieldDescriptor::TYPE_SFIXED64:
return JAVATYPE_LONG;
case FieldDescriptor::TYPE_FLOAT:
return JAVATYPE_FLOAT;
case FieldDescriptor::TYPE_DOUBLE:
return JAVATYPE_DOUBLE;
case FieldDescriptor::TYPE_BOOL:
return JAVATYPE_BOOLEAN;
case FieldDescriptor::TYPE_STRING:
return JAVATYPE_STRING;
case FieldDescriptor::TYPE_BYTES:
return JAVATYPE_BYTES;
case FieldDescriptor::TYPE_ENUM:
return JAVATYPE_ENUM;
case FieldDescriptor::TYPE_GROUP:
case FieldDescriptor::TYPE_MESSAGE:
return JAVATYPE_MESSAGE;
// No default because we want the compiler to complain if any new
// types are added.
}
GOOGLE_LOG(FATAL) << "Can't get here.";
return JAVATYPE_INT;
}
const char* BoxedPrimitiveTypeName(JavaType type) {
switch (type) {
case JAVATYPE_INT : return "java.lang.Integer";
case JAVATYPE_LONG : return "java.lang.Long";
case JAVATYPE_FLOAT : return "java.lang.Float";
case JAVATYPE_DOUBLE : return "java.lang.Double";
case JAVATYPE_BOOLEAN: return "java.lang.Boolean";
case JAVATYPE_STRING : return "java.lang.String";
case JAVATYPE_BYTES : return "com.google.protobuf.ByteString";
case JAVATYPE_ENUM : return NULL;
case JAVATYPE_MESSAGE: return NULL;
// No default because we want the compiler to complain if any new
// JavaTypes are added.
}
GOOGLE_LOG(FATAL) << "Can't get here.";
return NULL;
}
} // namespace java
} // namespace compiler
} // namespace protobuf
} // namespace google
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