Andreas Huber | 2831d51 | 2016-08-15 09:33:47 -0700 | [diff] [blame] | 1 | #include "AST.h" |
| 2 | |
| 3 | #include "Coordinator.h" |
| 4 | #include "Formatter.h" |
| 5 | #include "Interface.h" |
| 6 | #include "Method.h" |
| 7 | #include "Scope.h" |
| 8 | |
| 9 | #include <android-base/logging.h> |
| 10 | |
| 11 | namespace android { |
| 12 | |
| 13 | static std::string upcase(const std::string in) { |
| 14 | std::string out{in}; |
| 15 | |
| 16 | for (auto &ch : out) { |
| 17 | ch = toupper(ch); |
| 18 | } |
| 19 | |
| 20 | return out; |
| 21 | } |
| 22 | |
| 23 | void AST::emitJavaReaderWriter( |
| 24 | Formatter &out, |
| 25 | const std::string &parcelObj, |
| 26 | const TypedVar *arg, |
| 27 | bool isReader) const { |
| 28 | if (isReader) { |
| 29 | out << arg->type().getJavaType() |
| 30 | << " " |
| 31 | << arg->name() |
| 32 | << " = "; |
| 33 | } |
| 34 | |
| 35 | arg->type().emitJavaReaderWriter(out, parcelObj, arg->name(), isReader); |
| 36 | } |
| 37 | |
| 38 | status_t AST::generateJava(const std::string &outputPath) const { |
| 39 | std::string ifaceName; |
| 40 | if (!AST::isInterface(&ifaceName)) { |
| 41 | fprintf(stderr, "Common types are unsupported in the Java backend.\n"); |
| 42 | return UNKNOWN_ERROR; |
| 43 | } |
| 44 | |
| 45 | // cut off the leading 'I'. |
| 46 | const std::string baseName = ifaceName.substr(1); |
| 47 | |
| 48 | std::string path = outputPath; |
| 49 | path.append(mCoordinator->convertPackageRootToPath(mPackage)); |
| 50 | path.append(mCoordinator->getPackagePath(mPackage, true /* relative */)); |
| 51 | path.append(ifaceName); |
| 52 | path.append(".java"); |
| 53 | |
| 54 | CHECK(Coordinator::MakeParentHierarchy(path)); |
| 55 | FILE *file = fopen(path.c_str(), "w"); |
| 56 | |
| 57 | if (file == NULL) { |
| 58 | return -errno; |
| 59 | } |
| 60 | |
| 61 | Formatter out(file); |
| 62 | |
| 63 | std::vector<std::string> packageComponents; |
| 64 | getPackageAndVersionComponents( |
| 65 | &packageComponents, true /* cpp_compatible */); |
| 66 | |
| 67 | out << "package " << mPackage.javaPackage() << ";\n\n"; |
| 68 | |
| 69 | out << "import android.os.IHwBinder;\n"; |
| 70 | out << "import android.os.IHwInterface;\n"; |
| 71 | out << "import android.os.HwBinder;\n"; |
| 72 | out << "import android.os.HwParcel;\n\n"; |
| 73 | |
| 74 | for (const auto &item : mImportedNames) { |
| 75 | out << "import " << item.javaName() << ";\n"; |
| 76 | } |
| 77 | |
| 78 | if (!mImportedNames.empty()) { |
| 79 | out << "\n"; |
| 80 | } |
| 81 | |
| 82 | out.setNamespace(mPackage.javaPackage() + "."); |
| 83 | |
| 84 | const Interface *iface = mRootScope->getInterface(); |
| 85 | const Interface *superType = iface->superType(); |
| 86 | |
| 87 | out << "public interface " << ifaceName << " extends "; |
| 88 | |
| 89 | if (superType != NULL) { |
| 90 | out << superType->fullJavaName(); |
| 91 | } else { |
| 92 | out << "IHwInterface"; |
| 93 | } |
| 94 | |
| 95 | out << " {\n"; |
| 96 | out.indent(); |
| 97 | |
| 98 | out << "public static final String kInterfaceName = \"" |
| 99 | << mPackage.string() |
| 100 | << "::" |
| 101 | << ifaceName |
| 102 | << "\";\n\n"; |
| 103 | |
| 104 | out << "public static " |
| 105 | << ifaceName |
| 106 | << " asInterface(IHwBinder binder) {\n"; |
| 107 | |
| 108 | out.indent(); |
| 109 | |
| 110 | out << "if (binder == null) {\n"; |
| 111 | out.indent(); |
| 112 | out << "return null;\n"; |
| 113 | out.unindent(); |
| 114 | out << "}\n\n"; |
| 115 | |
| 116 | out << "IHwInterface iface =\n"; |
| 117 | out.indent(); |
| 118 | out.indent(); |
| 119 | out << "binder.queryLocalInterface(kInterfaceName);\n\n"; |
| 120 | out.unindent(); |
| 121 | out.unindent(); |
| 122 | |
| 123 | out << "if ((iface != null) && (iface instanceof " |
| 124 | << ifaceName |
| 125 | << ")) {\n"; |
| 126 | |
| 127 | out.indent(); |
| 128 | out << "return (" << ifaceName << ")iface;\n"; |
| 129 | out.unindent(); |
| 130 | out << "}\n\n"; |
| 131 | |
| 132 | out << "return new " << ifaceName << ".Proxy(binder);\n"; |
| 133 | |
| 134 | out.unindent(); |
| 135 | out << "}\n\n"; |
| 136 | |
| 137 | out << "public IHwBinder asBinder();\n\n"; |
| 138 | |
| 139 | status_t err = emitJavaTypeDeclarations(out); |
| 140 | |
| 141 | if (err != OK) { |
| 142 | return err; |
| 143 | } |
| 144 | |
| 145 | const std::string base = (superType != NULL) |
| 146 | ? (superType->fullJavaName() + ".kOpEnd") |
| 147 | : "IHwBinder.FIRST_CALL_TRANSACTION"; |
| 148 | |
| 149 | bool first = true; |
| 150 | size_t index = 0; |
| 151 | for (const auto &method : iface->methods()) { |
| 152 | out << "public static final int kOp_" |
| 153 | << upcase(method->name()) |
| 154 | << " = " |
| 155 | << base; |
| 156 | |
| 157 | if (!first) { |
| 158 | out << " + " << index; |
| 159 | } |
| 160 | |
| 161 | out << ";\n"; |
| 162 | |
| 163 | ++index; |
| 164 | first = false; |
| 165 | } |
| 166 | |
| 167 | out << "public static final int kOpEnd = " |
| 168 | << base |
| 169 | << " + " |
| 170 | << index |
| 171 | << ";"; |
| 172 | |
| 173 | out << "\n\n"; |
| 174 | |
| 175 | for (const auto &method : iface->methods()) { |
| 176 | const bool returnsValue = !method->results().empty(); |
| 177 | const bool needsCallback = method->results().size() > 1; |
| 178 | |
| 179 | if (needsCallback) { |
| 180 | out << "\npublic abstract class " |
| 181 | << method->name() |
| 182 | << "Callback {\n"; |
| 183 | |
| 184 | out.indent(); |
| 185 | |
| 186 | out << "public abstract void onValues(" |
| 187 | << Method::GetJavaSignature(method->results()) |
| 188 | << ");\n"; |
| 189 | |
| 190 | out.unindent(); |
| 191 | out << "}\n\n"; |
| 192 | } |
| 193 | |
| 194 | if (returnsValue && !needsCallback) { |
| 195 | out << method->results()[0]->type().getJavaType(); |
| 196 | } else { |
| 197 | out << "void"; |
| 198 | } |
| 199 | |
| 200 | out << " " |
| 201 | << method->name() |
| 202 | << "(" |
| 203 | << Method::GetJavaSignature(method->args()); |
| 204 | |
| 205 | if (needsCallback) { |
| 206 | if (!method->args().empty()) { |
| 207 | out << ", "; |
| 208 | } |
| 209 | |
| 210 | out << method->name() |
| 211 | << "Callback cb"; |
| 212 | } |
| 213 | |
| 214 | out << ");\n"; |
| 215 | } |
| 216 | |
| 217 | out << "\npublic static final class Proxy implements " |
| 218 | << ifaceName |
| 219 | << " {\n"; |
| 220 | |
| 221 | out.indent(); |
| 222 | |
| 223 | out << "private IHwBinder mRemote;\n\n"; |
| 224 | out << "public Proxy(IHwBinder remote) {\n"; |
| 225 | out.indent(); |
| 226 | out << "mRemote = remote;\n"; |
| 227 | out.unindent(); |
| 228 | out << "}\n\n"; |
| 229 | |
| 230 | out << "public IHwBinder asBinder() {\n"; |
| 231 | out.indent(); |
| 232 | out << "return mRemote;\n"; |
| 233 | out.unindent(); |
| 234 | out << "}\n\n"; |
| 235 | |
| 236 | std::vector<const Interface *> chain; |
| 237 | while (iface != NULL) { |
| 238 | chain.push_back(iface); |
| 239 | iface = iface->superType(); |
| 240 | } |
| 241 | |
| 242 | for (auto it = chain.rbegin(); it != chain.rend(); ++it) { |
| 243 | const Interface *superInterface = *it; |
| 244 | |
| 245 | out << "// Methods from " |
| 246 | << superInterface->fullName() |
| 247 | << " follow.\n"; |
| 248 | |
| 249 | for (const auto &method : superInterface->methods()) { |
| 250 | const bool returnsValue = !method->results().empty(); |
| 251 | const bool needsCallback = method->results().size() > 1; |
| 252 | |
| 253 | out << "public "; |
| 254 | if (returnsValue && !needsCallback) { |
| 255 | out << method->results()[0]->type().getJavaType(); |
| 256 | } else { |
| 257 | out << "void"; |
| 258 | } |
| 259 | |
| 260 | out << " " |
| 261 | << method->name() |
| 262 | << "(" |
| 263 | << Method::GetJavaSignature(method->args()); |
| 264 | |
| 265 | if (needsCallback) { |
| 266 | if (!method->args().empty()) { |
| 267 | out << ", "; |
| 268 | } |
| 269 | |
| 270 | out << method->name() |
| 271 | << "Callback cb"; |
| 272 | } |
| 273 | |
| 274 | out << ") {\n"; |
| 275 | out.indent(); |
| 276 | |
| 277 | out << "HwParcel request = new HwParcel();\n"; |
| 278 | out << "request.writeInterfaceToken(" |
| 279 | << superInterface->fullJavaName() |
| 280 | << ".kInterfaceName);\n"; |
| 281 | |
| 282 | for (const auto &arg : method->args()) { |
| 283 | emitJavaReaderWriter( |
| 284 | out, |
| 285 | "request", |
| 286 | arg, |
| 287 | false /* isReader */); |
| 288 | } |
| 289 | |
| 290 | out << "\nHwParcel reply = new HwParcel();\n" |
| 291 | << "mRemote.transact(kOp_" |
| 292 | << upcase(method->name()) |
| 293 | << ", request, reply, 0 /* flags */);\n" |
| 294 | << "reply.verifySuccess();\n" |
| 295 | << "request.releaseTemporaryStorage();\n"; |
| 296 | |
| 297 | if (returnsValue) { |
| 298 | out << "\n"; |
| 299 | |
| 300 | for (const auto &arg : method->results()) { |
| 301 | emitJavaReaderWriter( |
| 302 | out, |
| 303 | "reply", |
| 304 | arg, |
| 305 | true /* isReader */); |
| 306 | } |
| 307 | |
| 308 | if (needsCallback) { |
| 309 | out << "cb.onValues("; |
| 310 | |
| 311 | bool firstField = true; |
| 312 | for (const auto &arg : method->results()) { |
| 313 | if (!firstField) { |
| 314 | out << ", "; |
| 315 | } |
| 316 | |
| 317 | out << arg->name(); |
| 318 | firstField = false; |
| 319 | } |
| 320 | |
| 321 | out << ");\n"; |
| 322 | } else { |
| 323 | const std::string returnName = method->results()[0]->name(); |
| 324 | out << "return " << returnName << ";\n"; |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | out.unindent(); |
| 329 | out << "}\n\n"; |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | out.unindent(); |
| 334 | out << "}\n"; |
| 335 | |
| 336 | //////////////////////////////////////////////////////////////////////////// |
| 337 | |
| 338 | out << "\npublic static abstract class Stub extends HwBinder " |
| 339 | << "implements " |
| 340 | << ifaceName << " {\n"; |
| 341 | |
| 342 | out.indent(); |
| 343 | |
| 344 | out << "public IHwBinder asBinder() {\n"; |
| 345 | out.indent(); |
| 346 | out << "return this;\n"; |
| 347 | out.unindent(); |
| 348 | out << "}\n\n"; |
| 349 | |
| 350 | out << "public IHwInterface queryLocalInterface(String descriptor) {\n"; |
| 351 | out.indent(); |
| 352 | // XXX what about potential superClasses? |
| 353 | out << "if (kInterfaceName.equals(descriptor)) {\n"; |
| 354 | out.indent(); |
| 355 | out << "return this;\n"; |
| 356 | out.unindent(); |
| 357 | out << "}\n"; |
| 358 | out << "return null;\n"; |
| 359 | out.unindent(); |
| 360 | out << "}\n\n"; |
| 361 | |
| 362 | out << "public void onTransact(" |
| 363 | << "int code, HwParcel request, final HwParcel reply, " |
| 364 | << "int flags) {\n"; |
| 365 | |
| 366 | out.indent(); |
| 367 | |
| 368 | out << "switch (code) {\n"; |
| 369 | |
| 370 | out.indent(); |
| 371 | |
| 372 | for (auto it = chain.rbegin(); it != chain.rend(); ++it) { |
| 373 | const Interface *superInterface = *it; |
| 374 | |
| 375 | for (const auto &method : superInterface->methods()) { |
| 376 | const bool returnsValue = !method->results().empty(); |
| 377 | const bool needsCallback = method->results().size() > 1; |
| 378 | |
| 379 | out << "case " |
| 380 | << superInterface->fullJavaName() |
| 381 | << ".kOp_" |
| 382 | << |
| 383 | upcase(method->name()) |
| 384 | << ":\n{\n"; |
| 385 | |
| 386 | out.indent(); |
| 387 | |
| 388 | out << "request.enforceInterface(" |
| 389 | << superInterface->fullJavaName() |
| 390 | << ".kInterfaceName);\n\n"; |
| 391 | |
| 392 | for (const auto &arg : method->args()) { |
| 393 | emitJavaReaderWriter( |
| 394 | out, |
| 395 | "request", |
| 396 | arg, |
| 397 | true /* isReader */); |
| 398 | } |
| 399 | |
| 400 | if (!needsCallback && returnsValue) { |
| 401 | const TypedVar *returnArg = method->results()[0]; |
| 402 | |
| 403 | out << returnArg->type().getJavaType() |
| 404 | << " " |
| 405 | << returnArg->name() |
| 406 | << " = "; |
| 407 | } |
| 408 | |
| 409 | out << method->name() |
| 410 | << "("; |
| 411 | |
| 412 | bool firstField = true; |
| 413 | for (const auto &arg : method->args()) { |
| 414 | if (!firstField) { |
| 415 | out << ", "; |
| 416 | } |
| 417 | |
| 418 | out << arg->name(); |
| 419 | |
| 420 | firstField = false; |
| 421 | } |
| 422 | |
| 423 | if (needsCallback) { |
| 424 | if (!firstField) { |
| 425 | out << ", "; |
| 426 | } |
| 427 | |
| 428 | out << "new " << method->name() << "Callback() {\n"; |
| 429 | out.indent(); |
| 430 | |
| 431 | out << "@Override\n" |
| 432 | << "public void onValues(" |
| 433 | << Method::GetJavaSignature(method->results()) |
| 434 | << ") {\n"; |
| 435 | |
| 436 | out.indent(); |
| 437 | out << "reply.writeStatus(HwParcel.STATUS_SUCCESS);\n"; |
| 438 | |
| 439 | for (const auto &arg : method->results()) { |
| 440 | emitJavaReaderWriter( |
| 441 | out, |
| 442 | "reply", |
| 443 | arg, |
| 444 | false /* isReader */); |
| 445 | } |
| 446 | |
| 447 | out << "reply.send();\n" |
| 448 | << "}}"; |
| 449 | |
| 450 | out.unindent(); |
| 451 | out.unindent(); |
| 452 | } |
| 453 | |
| 454 | out << ");\n"; |
| 455 | |
| 456 | if (!needsCallback) { |
| 457 | out << "reply.writeStatus(HwParcel.STATUS_SUCCESS);\n"; |
| 458 | |
| 459 | if (returnsValue) { |
| 460 | const TypedVar *returnArg = method->results()[0]; |
| 461 | |
| 462 | emitJavaReaderWriter( |
| 463 | out, |
| 464 | "reply", |
| 465 | returnArg, |
| 466 | false /* isReader */); |
| 467 | } |
| 468 | |
| 469 | out << "reply.send();\n"; |
| 470 | } |
| 471 | |
| 472 | out << "break;\n"; |
| 473 | out.unindent(); |
| 474 | out << "}\n\n"; |
| 475 | } |
| 476 | } |
| 477 | |
| 478 | out.unindent(); |
| 479 | out << "}\n"; |
| 480 | |
| 481 | out.unindent(); |
| 482 | out << "}\n"; |
| 483 | |
| 484 | out.unindent(); |
| 485 | out << "}\n"; |
| 486 | |
| 487 | out.unindent(); |
| 488 | out << "}\n"; |
| 489 | |
| 490 | return OK; |
| 491 | } |
| 492 | |
| 493 | status_t AST::emitJavaTypeDeclarations(Formatter &out) const { |
| 494 | return mRootScope->emitJavaTypeDeclarations(out); |
| 495 | } |
| 496 | |
| 497 | } // namespace android |
| 498 | |