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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 <map>
#include <string>
#include <google/protobuf/compiler/java/java_enum.h>
#include <google/protobuf/compiler/java/java_helpers.h>
#include <google/protobuf/io/printer.h>
#include <google/protobuf/descriptor.pb.h>
#include <google/protobuf/stubs/strutil.h>
namespace google {
namespace protobuf {
namespace compiler {
namespace java {
EnumGenerator::EnumGenerator(const EnumDescriptor* descriptor)
: descriptor_(descriptor) {
for (int i = 0; i < descriptor_->value_count(); i++) {
const EnumValueDescriptor* value = descriptor_->value(i);
const EnumValueDescriptor* canonical_value =
descriptor_->FindValueByNumber(value->number());
if (value == canonical_value) {
canonical_values_.push_back(value);
} else {
Alias alias;
alias.value = value;
alias.canonical_value = canonical_value;
aliases_.push_back(alias);
}
}
}
EnumGenerator::~EnumGenerator() {}
void EnumGenerator::Generate(io::Printer* printer) {
bool is_own_file =
descriptor_->containing_type() == NULL &&
descriptor_->file()->options().java_multiple_files();
printer->Print(
"public $static$ enum $classname$ {\n",
"static", is_own_file ? "" : "static",
"classname", descriptor_->name());
printer->Indent();
for (int i = 0; i < canonical_values_.size(); i++) {
map<string, string> vars;
vars["name"] = canonical_values_[i]->name();
vars["index"] = SimpleItoa(canonical_values_[i]->index());
vars["number"] = SimpleItoa(canonical_values_[i]->number());
printer->Print(vars,
"$name$($index$, $number$),\n");
}
printer->Print(
";\n"
"\n");
// -----------------------------------------------------------------
for (int i = 0; i < aliases_.size(); i++) {
map<string, string> vars;
vars["classname"] = descriptor_->name();
vars["name"] = aliases_[i].value->name();
vars["canonical_name"] = aliases_[i].canonical_value->name();
printer->Print(vars,
"public static final $classname$ $name$ = $canonical_name$;\n");
}
// -----------------------------------------------------------------
printer->Print(
"\n"
"public final int getNumber() { return value; }\n"
"\n"
"public static $classname$ valueOf(int value) {\n"
" switch (value) {\n",
"classname", descriptor_->name());
printer->Indent();
printer->Indent();
for (int i = 0; i < canonical_values_.size(); i++) {
printer->Print(
"case $number$: return $name$;\n",
"name", canonical_values_[i]->name(),
"number", SimpleItoa(canonical_values_[i]->number()));
}
printer->Outdent();
printer->Outdent();
printer->Print(
" default: return null;\n"
" }\n"
"}\n"
"\n");
// -----------------------------------------------------------------
// Reflection
printer->Print(
"public final com.google.protobuf.Descriptors.EnumValueDescriptor\n"
" getValueDescriptor() {\n"
" return getDescriptor().getValues().get(index);\n"
"}\n"
"public final com.google.protobuf.Descriptors.EnumDescriptor\n"
" getDescriptorForType() {\n"
" return getDescriptor();\n"
"}\n"
"public static final com.google.protobuf.Descriptors.EnumDescriptor\n"
" getDescriptor() {\n");
// TODO(kenton): Cache statically? Note that we can't access descriptors
// at module init time because it wouldn't work with descriptor.proto, but
// we can cache the value the first time getDescriptor() is called.
if (descriptor_->containing_type() == NULL) {
printer->Print(
" return $file$.getDescriptor().getEnumTypes().get($index$);\n",
"file", ClassName(descriptor_->file()),
"index", SimpleItoa(descriptor_->index()));
} else {
printer->Print(
" return $parent$.getDescriptor().getEnumTypes().get($index$);\n",
"parent", ClassName(descriptor_->containing_type()),
"index", SimpleItoa(descriptor_->index()));
}
printer->Print(
"}\n"
"\n"
"private static final $classname$[] VALUES = {\n"
" ",
"classname", descriptor_->name());
for (int i = 0; i < descriptor_->value_count(); i++) {
printer->Print("$name$, ",
"name", descriptor_->value(i)->name());
}
printer->Print(
"\n"
"};\n"
"public static $classname$ valueOf(\n"
" com.google.protobuf.Descriptors.EnumValueDescriptor desc) {\n"
" if (desc.getType() != getDescriptor()) {\n"
" throw new java.lang.IllegalArgumentException(\n"
" \"EnumValueDescriptor is not for this type.\");\n"
" }\n"
" return VALUES[desc.getIndex()];\n"
"}\n",
"classname", descriptor_->name());
// -----------------------------------------------------------------
printer->Print(
"private final int index;\n"
"private final int value;\n"
"private $classname$(int index, int value) {\n"
" this.index = index;\n"
" this.value = value;\n"
"}\n",
"classname", descriptor_->name());
printer->Outdent();
printer->Print("}\n\n");
}
} // namespace java
} // namespace compiler
} // namespace protobuf
} // namespace google
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