java/src/main/java/com/jsoniter/JsonIterator.java at master · iCodeIN/java · GitHub

History

554 lines (488 loc) · 18.4 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

468

469

470

471

472

473

474

475

476

477

478

479

480

481

482

483

484

485

486

487

488

489

490

491

492

493

494

495

496

497

498

499

500

501

502

503

504

505

506

507

508

509

510

511

512

513

514

515

516

517

518

519

520

521

522

523

524

525

526

527

528

529

530

531

532

533

534

535

536

537

538

539

540

541

542

543

544

545

546

547

548

549

550

551

552

553

554

package com.jsoniter;

import com.jsoniter.any.Any;

import com.jsoniter.spi.*;

import java.io.Closeable;

import java.io.IOException;

import java.io.InputStream;

import java.lang.reflect.Type;

import java.math.BigDecimal;

import java.math.BigInteger;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

public class JsonIterator implements Closeable {

public Config configCache;

private static boolean isStreamingEnabled = false;

final static ValueType[] valueTypes = new ValueType[256];

InputStream in;

byte[] buf;

int head;

int tail;

int skipStartedAt = -1; // skip should keep bytes starting at this pos

Map<String, Object> tempObjects = null; // used in reflection object decoder

final Slice reusableSlice = new Slice(null, 0, 0);

char[] reusableChars = new char[32];

Object existingObject = null; // the object should be bind to next

static {

for (int i = 0; i < valueTypes.length; i++) {

valueTypes[i] = ValueType.INVALID;

}

valueTypes['"'] = ValueType.STRING;

valueTypes['-'] = ValueType.NUMBER;

valueTypes['0'] = ValueType.NUMBER;

valueTypes['1'] = ValueType.NUMBER;

valueTypes['2'] = ValueType.NUMBER;

valueTypes['3'] = ValueType.NUMBER;

valueTypes['4'] = ValueType.NUMBER;

valueTypes['5'] = ValueType.NUMBER;

valueTypes['6'] = ValueType.NUMBER;

valueTypes['7'] = ValueType.NUMBER;

valueTypes['8'] = ValueType.NUMBER;

valueTypes['9'] = ValueType.NUMBER;

valueTypes['t'] = ValueType.BOOLEAN;

valueTypes['f'] = ValueType.BOOLEAN;

valueTypes['n'] = ValueType.NULL;

valueTypes['['] = ValueType.ARRAY;

valueTypes['{'] = ValueType.OBJECT;

}

private JsonIterator(InputStream in, byte[] buf, int head, int tail) {

this.in = in;

this.buf = buf;

this.head = head;

this.tail = tail;

}

public JsonIterator() {

this(null, new byte[0], 0, 0);

}

public static JsonIterator parse(InputStream in, int bufSize) {

enableStreamingSupport();

return new JsonIterator(in, new byte[bufSize], 0, 0);

}

public static JsonIterator parse(byte[] buf) {

return new JsonIterator(null, buf, 0, buf.length);

}

public static JsonIterator parse(byte[] buf, int head, int tail) {

return new JsonIterator(null, buf, head, tail);

}

public static JsonIterator parse(String str) {

return parse(str.getBytes());

}

public static JsonIterator parse(Slice slice) {

return new JsonIterator(null, slice.data(), slice.head(), slice.tail());

}

public final void reset(byte[] buf) {

this.buf = buf;

this.head = 0;

this.tail = buf.length;

}

public final void reset(byte[] buf, int head, int tail) {

this.buf = buf;

this.head = head;

this.tail = tail;

}

public final void reset(Slice value) {

this.buf = value.data();

this.head = value.head();

this.tail = value.tail();

}

public final void reset(InputStream in) {

JsonIterator.enableStreamingSupport();

this.in = in;

this.head = 0;

this.tail = 0;

}

public final void close() throws IOException {

if (in != null) {

in.close();

}

final void unreadByte() {

if (head == 0) {

throw reportError("unreadByte", "unread too many bytes");

}

head--;

}

public final JsonException reportError(String op, String msg) {

int peekStart = head - 10;

if (peekStart < 0) {

peekStart = 0;

}

int peekSize = head - peekStart;

if (head > tail) {

peekSize = tail - peekStart;

}

String peek = new String(buf, peekStart, peekSize);

throw new JsonException(op + ": " + msg + ", head: " + head + ", peek: " + peek + ", buf: " + new String(buf));

}

public final String currentBuffer() {

int peekStart = head - 10;

if (peekStart < 0) {

peekStart = 0;

}

String peek = new String(buf, peekStart, head - peekStart);

return "head: " + head + ", peek: " + peek + ", buf: " + new String(buf);

}

public final boolean readNull() throws IOException {

byte c = IterImpl.nextToken(this);

if (c != 'n') {

unreadByte();

return false;

}

IterImpl.skipFixedBytes(this, 3); // null

return true;

}

public final boolean readBoolean() throws IOException {

byte c = IterImpl.nextToken(this);

if ('t' == c) {

IterImpl.skipFixedBytes(this, 3); // true

return true;

}

if ('f' == c) {

IterImpl.skipFixedBytes(this, 4); // false

return false;

}

throw reportError("readBoolean", "expect t or f, found: " + c);

}

public final short readShort() throws IOException {

int v = readInt();

if (Short.MIN_VALUE <= v && v <= Short.MAX_VALUE) {

return (short) v;

} else {

throw reportError("readShort", "short overflow: " + v);

}

public final int readInt() throws IOException {

return IterImplNumber.readInt(this);

}

public final long readLong() throws IOException {

return IterImplNumber.readLong(this);

}

public final boolean readArray() throws IOException {

return IterImplArray.readArray(this);

}

public String readNumberAsString() throws IOException {

IterImplForStreaming.numberChars numberChars = IterImplForStreaming.readNumber(this);

return new String(numberChars.chars, 0, numberChars.charsLength);

}

public static interface ReadArrayCallback {

boolean handle(JsonIterator iter, Object attachment) throws IOException;

}

public final boolean readArrayCB(ReadArrayCallback callback, Object attachment) throws IOException {

return IterImplArray.readArrayCB(this, callback, attachment);

}

public final String readString() throws IOException {

return IterImplString.readString(this);

}

public final Slice readStringAsSlice() throws IOException {

return IterImpl.readSlice(this);

}

public final String readObject() throws IOException {

return IterImplObject.readObject(this);

}

public static interface ReadObjectCallback {

boolean handle(JsonIterator iter, String field, Object attachment) throws IOException;

}

public final void readObjectCB(ReadObjectCallback cb, Object attachment) throws IOException {

IterImplObject.readObjectCB(this, cb, attachment);

}

public final float readFloat() throws IOException {

return IterImplNumber.readFloat(this);

}

public final double readDouble() throws IOException {

return IterImplNumber.readDouble(this);

}

public final BigDecimal readBigDecimal() throws IOException {

// skip whitespace by read next

ValueType valueType = whatIsNext();

if (valueType == ValueType.NULL) {

skip();

return null;

}

if (valueType != ValueType.NUMBER) {

throw reportError("readBigDecimal", "not number");

}

IterImplForStreaming.numberChars numberChars = IterImplForStreaming.readNumber(this);

return new BigDecimal(numberChars.chars, 0, numberChars.charsLength);

}

public final BigInteger readBigInteger() throws IOException {

// skip whitespace by read next

ValueType valueType = whatIsNext();

if (valueType == ValueType.NULL) {

skip();

return null;

}

if (valueType != ValueType.NUMBER) {

throw reportError("readBigDecimal", "not number");

}

IterImplForStreaming.numberChars numberChars = IterImplForStreaming.readNumber(this);

return new BigInteger(new String(numberChars.chars, 0, numberChars.charsLength));

}

public final Any readAny() throws IOException {

try {

return IterImpl.readAny(this);

} catch (ArrayIndexOutOfBoundsException e) {

throw reportError("read", "premature end");

}

private final static ReadArrayCallback fillArray = new ReadArrayCallback() {

@Override

public boolean handle(JsonIterator iter, Object attachment) throws IOException {

List list = (List) attachment;

list.add(iter.read());

return true;

}

};

private final static ReadObjectCallback fillObject = new ReadObjectCallback() {

@Override

public boolean handle(JsonIterator iter, String field, Object attachment) throws IOException {

Map map = (Map) attachment;

map.put(field, iter.read());

return true;

}

};

public final Object read() throws IOException {

try {

ValueType valueType = whatIsNext();

switch (valueType) {

case STRING:

return readString();

case NUMBER:

IterImplForStreaming.numberChars numberChars = IterImplForStreaming.readNumber(this);

String numberStr = new String(numberChars.chars, 0, numberChars.charsLength);

Double number = Double.valueOf(numberStr);

if (numberChars.dotFound) {

return number;

}

double doubleNumber = number;

if (doubleNumber == Math.floor(doubleNumber) && !Double.isInfinite(doubleNumber)) {

long longNumber = Long.valueOf(numberStr);

if (longNumber <= Integer.MAX_VALUE && longNumber >= Integer.MIN_VALUE) {

return (int) longNumber;

}

return longNumber;

}

return number;

case NULL:

IterImpl.skipFixedBytes(this, 4);

return null;

case BOOLEAN:

return readBoolean();

case ARRAY:

ArrayList list = new ArrayList(4);

readArrayCB(fillArray, list);

return list;

case OBJECT:

Map map = new HashMap(4);

readObjectCB(fillObject, map);

return map;

default:

throw reportError("read", "unexpected value type: " + valueType);

}

} catch (ArrayIndexOutOfBoundsException e) {

throw reportError("read", "premature end");

}

/**

* try to bind to existing object, returned object might not the same instance

* @param existingObject the object instance to reuse

* @param <T> object type

* @return data binding result, might not be the same object

* @throws IOException if I/O went wrong

public final <T> T read(T existingObject) throws IOException {

try {

this.existingObject = existingObject;

Class<?> clazz = existingObject.getClass();

String cacheKey = currentConfig().getDecoderCacheKey(clazz);

return (T) Codegen.getDecoder(cacheKey, clazz).decode(this);

} catch (ArrayIndexOutOfBoundsException e) {

throw reportError("read", "premature end");

}

private Config currentConfig() {

if (configCache == null) {

configCache = JsoniterSpi.getCurrentConfig();

}

return configCache;

}

/**

* try to bind to existing object, returned object might not the same instance

* @param typeLiteral the type object

* @param existingObject the object instance to reuse

* @param <T> object type

* @return data binding result, might not be the same object

* @throws IOException if I/O went wrong

public final <T> T read(TypeLiteral<T> typeLiteral, T existingObject) throws IOException {

try {

this.existingObject = existingObject;

String cacheKey = currentConfig().getDecoderCacheKey(typeLiteral.getType());

return (T) Codegen.getDecoder(cacheKey, typeLiteral.getType()).decode(this);

} catch (ArrayIndexOutOfBoundsException e) {

throw reportError("read", "premature end");

}

public final <T> T read(Class<T> clazz) throws IOException {

return (T) read((Type) clazz);

}

public final <T> T read(TypeLiteral<T> typeLiteral) throws IOException {

return (T) read(typeLiteral.getType());

}

public final Object read(Type type) throws IOException {

try {

String cacheKey = currentConfig().getDecoderCacheKey(type);

return Codegen.getDecoder(cacheKey, type).decode(this);

} catch (ArrayIndexOutOfBoundsException e) {

throw reportError("read", "premature end");

}

public ValueType whatIsNext() throws IOException {

ValueType valueType = valueTypes[IterImpl.nextToken(this)];

unreadByte();

return valueType;

}

public void skip() throws IOException {

IterImplSkip.skip(this);

}

public static final <T> T deserialize(Config config, String input, Class<T> clazz) {

JsoniterSpi.setCurrentConfig(config);

try {

return deserialize(input.getBytes(), clazz);

} finally {

JsoniterSpi.clearCurrentConfig();

}

public static final <T> T deserialize(String input, Class<T> clazz) {

return deserialize(input.getBytes(), clazz);

}

public static final <T> T deserialize(Config config, String input, TypeLiteral<T> typeLiteral) {

JsoniterSpi.setCurrentConfig(config);

try {

return deserialize(input.getBytes(), typeLiteral);

} finally {

JsoniterSpi.clearCurrentConfig();

}

public static final <T> T deserialize(String input, TypeLiteral<T> typeLiteral) {

return deserialize(input.getBytes(), typeLiteral);

}

public static final <T> T deserialize(Config config, byte[] input, Class<T> clazz) {

JsoniterSpi.setCurrentConfig(config);

try {

return deserialize(input, clazz);

} finally {

JsoniterSpi.clearCurrentConfig();

}

public static final <T> T deserialize(byte[] input, Class<T> clazz) {

int lastNotSpacePos = findLastNotSpacePos(input);

JsonIterator iter = JsonIteratorPool.borrowJsonIterator();

iter.reset(input, 0, lastNotSpacePos);

try {

T val = iter.read(clazz);

if (iter.head != lastNotSpacePos) {

throw iter.reportError("deserialize", "trailing garbage found");

}

return val;

} catch (ArrayIndexOutOfBoundsException e) {

throw iter.reportError("deserialize", "premature end");

} catch (IOException e) {

throw new JsonException(e);

} finally {

JsonIteratorPool.returnJsonIterator(iter);

}

public static final <T> T deserialize(Config config, byte[] input, TypeLiteral<T> typeLiteral) {

JsoniterSpi.setCurrentConfig(config);

try {

return deserialize(input, typeLiteral);

} finally {

JsoniterSpi.clearCurrentConfig();

}

public static final <T> T deserialize(byte[] input, TypeLiteral<T> typeLiteral) {

int lastNotSpacePos = findLastNotSpacePos(input);

JsonIterator iter = JsonIteratorPool.borrowJsonIterator();

iter.reset(input, 0, lastNotSpacePos);

try {

T val = iter.read(typeLiteral);

if (iter.head != lastNotSpacePos) {

throw iter.reportError("deserialize", "trailing garbage found");

}

return val;

} catch (ArrayIndexOutOfBoundsException e) {

throw iter.reportError("deserialize", "premature end");

} catch (IOException e) {

throw new JsonException(e);

} finally {

JsonIteratorPool.returnJsonIterator(iter);

}

public static final Any deserialize(Config config, String input) {

JsoniterSpi.setCurrentConfig(config);

try {

return deserialize(input.getBytes());

} finally {

JsoniterSpi.clearCurrentConfig();

}

public static final Any deserialize(String input) {

return deserialize(input.getBytes());

}

public static final Any deserialize(Config config, byte[] input) {

JsoniterSpi.setCurrentConfig(config);

try {

return deserialize(input);

} finally {

JsoniterSpi.clearCurrentConfig();

}

public static final Any deserialize(byte[] input) {

int lastNotSpacePos = findLastNotSpacePos(input);

JsonIterator iter = JsonIteratorPool.borrowJsonIterator();

iter.reset(input, 0, lastNotSpacePos);

try {

Any val = iter.readAny();

if (iter.head != lastNotSpacePos) {

throw iter.reportError("deserialize", "trailing garbage found");

}

return val;

} catch (ArrayIndexOutOfBoundsException e) {

throw iter.reportError("deserialize", "premature end");

} catch (IOException e) {

throw new JsonException(e);

} finally {

JsonIteratorPool.returnJsonIterator(iter);

}

private static int findLastNotSpacePos(byte[] input) {

for (int i = input.length - 1; i >= 0; i--) {

byte c = input[i];

if (c != ' ' && c != '\t' && c != '\n' && c != '\r') {

return i + 1;

}

return 0;

}

public static void setMode(DecodingMode mode) {

Config newConfig = JsoniterSpi.getDefaultConfig().copyBuilder().decodingMode(mode).build();

JsoniterSpi.setDefaultConfig(newConfig);

JsoniterSpi.setCurrentConfig(newConfig);

}

public static void enableStreamingSupport() {

if (isStreamingEnabled) {

return;

}

isStreamingEnabled = true;

try {

DynamicCodegen.enableStreamingSupport();

} catch (JsonException e) {

throw e;

} catch (Exception e) {

throw new JsonException(e);

}

java/src/main/java/com/jsoniter/JsonIterator.java at master · iCodeIN/java · GitHub

Uh oh!

Expand file tree

Breadcrumbs

JsonIterator.java

Latest commit

History

Breadcrumbs

JsonIterator.java

File metadata and controls