/*
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* Copyright (C) 2016, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "generate_java.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <memory>
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#include <sstream>
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#include <android-base/stringprintf.h>
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#include "aidl_to_java.h"
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#include "code_writer.h"
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#include "type_java.h"
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using std::unique_ptr;
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using ::android::aidl::java::Variable;
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using std::string;
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namespace android {
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namespace aidl {
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namespace java {
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bool generate_java_interface(const string& filename, const AidlInterface* iface,
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JavaTypeNamespace* types, const IoDelegate& io_delegate,
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const Options& options) {
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Class* cl = generate_binder_interface_class(iface, types, options);
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Document* document =
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new Document("" /* no comment */, iface->GetPackage(), unique_ptr<Class>(cl));
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CodeWriterPtr code_writer = io_delegate.GetCodeWriter(filename);
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document->Write(code_writer.get());
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return true;
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}
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bool generate_java_parcel(const std::string& filename, const AidlStructuredParcelable* parcel,
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AidlTypenames& typenames, const IoDelegate& io_delegate) {
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Class* cl = generate_parcel_class(parcel, typenames);
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Document* document =
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new Document("" /* no comment */, parcel->GetPackage(), unique_ptr<Class>(cl));
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CodeWriterPtr code_writer = io_delegate.GetCodeWriter(filename);
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document->Write(code_writer.get());
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return true;
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}
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bool generate_java_parcel_declaration(const std::string& filename, const IoDelegate& io_delegate) {
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CodeWriterPtr code_writer = io_delegate.GetCodeWriter(filename);
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*code_writer
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<< "// This file is intentionally left blank as placeholder for parcel declaration.\n";
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return true;
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}
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bool generate_java(const std::string& filename, const AidlDefinedType* defined_type,
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JavaTypeNamespace* types, const IoDelegate& io_delegate,
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const Options& options) {
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const AidlStructuredParcelable* parcelable = defined_type->AsStructuredParcelable();
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if (parcelable != nullptr) {
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return generate_java_parcel(filename, parcelable, types->typenames_, io_delegate);
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}
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const AidlParcelable* parcelable_decl = defined_type->AsParcelable();
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if (parcelable_decl != nullptr) {
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return generate_java_parcel_declaration(filename, io_delegate);
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}
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const AidlInterface* interface = defined_type->AsInterface();
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if (interface != nullptr) {
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return generate_java_interface(filename, interface, types, io_delegate, options);
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}
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CHECK(false) << "Unrecognized type sent for cpp generation.";
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return false;
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}
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android::aidl::java::Class* generate_parcel_class(const AidlStructuredParcelable* parcel,
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AidlTypenames& typenames) {
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Class* parcel_class = new Class;
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parcel_class->comment = parcel->GetComments();
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parcel_class->modifiers = PUBLIC;
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parcel_class->what = Class::CLASS;
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parcel_class->type = parcel->GetCanonicalName();
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parcel_class->interfaces.push_back("android.os.Parcelable");
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parcel_class->annotations = generate_java_annotations(*parcel);
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for (const auto& variable : parcel->GetFields()) {
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const Type* type = variable->GetType().GetLanguageType<Type>();
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std::ostringstream out;
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out << variable->GetType().GetComments() << "\n";
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for (const auto& a : generate_java_annotations(variable->GetType())) {
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out << a << "\n";
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}
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out << "public " << type->JavaType() << (variable->GetType().IsArray() ? "[]" : "") << " "
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<< variable->GetName();
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if (variable->GetDefaultValue()) {
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out << " = " << variable->ValueString(AidlConstantValueDecorator);
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}
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out << ";\n";
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parcel_class->elements.push_back(new LiteralClassElement(out.str()));
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}
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std::ostringstream out;
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out << "public static final android.os.Parcelable.Creator<" << parcel->GetName() << "> CREATOR = "
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<< "new android.os.Parcelable.Creator<" << parcel->GetName() << ">() {\n";
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out << " @Override\n";
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out << " public " << parcel->GetName()
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<< " createFromParcel(android.os.Parcel _aidl_source) {\n";
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out << " " << parcel->GetName() << " _aidl_out = new " << parcel->GetName() << "();\n";
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out << " _aidl_out.readFromParcel(_aidl_source);\n";
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out << " return _aidl_out;\n";
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out << " }\n";
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out << " @Override\n";
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out << " public " << parcel->GetName() << "[] newArray(int _aidl_size) {\n";
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out << " return new " << parcel->GetName() << "[_aidl_size];\n";
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out << " }\n";
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out << "};\n";
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parcel_class->elements.push_back(new LiteralClassElement(out.str()));
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Variable* flag_variable = new Variable("int", "_aidl_flag");
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Variable* parcel_variable = new Variable("android.os.Parcel", "_aidl_parcel");
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Method* write_method = new Method;
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write_method->modifiers = PUBLIC | OVERRIDE | FINAL;
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write_method->returnType = "void";
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write_method->name = "writeToParcel";
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write_method->parameters.push_back(parcel_variable);
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write_method->parameters.push_back(flag_variable);
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write_method->statements = new StatementBlock();
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out.str("");
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out << "int _aidl_start_pos = _aidl_parcel.dataPosition();\n"
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<< "_aidl_parcel.writeInt(0);\n";
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write_method->statements->Add(new LiteralStatement(out.str()));
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for (const auto& field : parcel->GetFields()) {
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string code;
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CodeWriterPtr writer = CodeWriter::ForString(&code);
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CodeGeneratorContext context{
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.writer = *(writer.get()),
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.typenames = typenames,
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.type = field->GetType(),
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.var = field->GetName(),
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.parcel = parcel_variable->name,
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.is_return_value = false,
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};
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WriteToParcelFor(context);
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writer->Close();
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write_method->statements->Add(new LiteralStatement(code));
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}
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out.str("");
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out << "int _aidl_end_pos = _aidl_parcel.dataPosition();\n"
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<< "_aidl_parcel.setDataPosition(_aidl_start_pos);\n"
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<< "_aidl_parcel.writeInt(_aidl_end_pos - _aidl_start_pos);\n"
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<< "_aidl_parcel.setDataPosition(_aidl_end_pos);\n";
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write_method->statements->Add(new LiteralStatement(out.str()));
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parcel_class->elements.push_back(write_method);
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Method* read_method = new Method;
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read_method->modifiers = PUBLIC | FINAL;
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read_method->returnType = "void";
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read_method->name = "readFromParcel";
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read_method->parameters.push_back(parcel_variable);
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read_method->statements = new StatementBlock();
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out.str("");
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out << "int _aidl_start_pos = _aidl_parcel.dataPosition();\n"
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<< "int _aidl_parcelable_size = _aidl_parcel.readInt();\n"
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<< "if (_aidl_parcelable_size < 0) return;\n"
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<< "try {\n";
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read_method->statements->Add(new LiteralStatement(out.str()));
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out.str("");
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out << " if (_aidl_parcel.dataPosition() - _aidl_start_pos >= _aidl_parcelable_size) return;\n";
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LiteralStatement* sizeCheck = nullptr;
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// keep this across different fields in order to create the classloader
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// at most once.
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bool is_classloader_created = false;
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for (const auto& field : parcel->GetFields()) {
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string code;
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CodeWriterPtr writer = CodeWriter::ForString(&code);
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CodeGeneratorContext context{
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.writer = *(writer.get()),
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.typenames = typenames,
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.type = field->GetType(),
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.var = field->GetName(),
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.parcel = parcel_variable->name,
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.is_classloader_created = &is_classloader_created,
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};
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context.writer.Indent();
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CreateFromParcelFor(context);
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writer->Close();
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read_method->statements->Add(new LiteralStatement(code));
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if (!sizeCheck) sizeCheck = new LiteralStatement(out.str());
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read_method->statements->Add(sizeCheck);
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}
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out.str("");
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out << "} finally {\n"
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<< " _aidl_parcel.setDataPosition(_aidl_start_pos + _aidl_parcelable_size);\n"
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<< "}\n";
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read_method->statements->Add(new LiteralStatement(out.str()));
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parcel_class->elements.push_back(read_method);
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Method* describe_contents_method = new Method;
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describe_contents_method->modifiers = PUBLIC | OVERRIDE;
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describe_contents_method->returnType = "int";
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describe_contents_method->name = "describeContents";
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describe_contents_method->statements = new StatementBlock();
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describe_contents_method->statements->Add(new LiteralStatement("return 0;\n"));
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parcel_class->elements.push_back(describe_contents_method);
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return parcel_class;
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}
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std::vector<std::string> generate_java_annotations(const AidlAnnotatable& a) {
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std::vector<std::string> result;
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if (a.IsUnsupportedAppUsage()) {
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result.emplace_back("@android.annotation.UnsupportedAppUsage");
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}
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if (a.IsSystemApi()) {
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result.emplace_back("@android.annotation.SystemApi");
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}
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return result;
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}
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} // namespace java
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} // namespace android
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} // namespace aidl
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