JSON-java/JSONWriter.java at writeable · run2000/JSON-java · GitHub

History

1255 lines (1182 loc) · 44.5 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

555

556

557

558

559

560

561

562

563

564

565

566

567

568

569

570

571

572

573

574

575

576

577

578

579

580

581

582

583

584

585

586

587

588

589

590

591

592

593

594

595

596

597

598

599

600

601

602

603

604

605

606

607

608

609

610

611

612

613

614

615

616

617

618

619

620

621

622

623

624

625

626

627

628

629

630

631

632

633

634

635

636

637

638

639

640

641

642

643

644

645

646

647

648

649

650

651

652

653

654

655

656

657

658

659

660

661

662

663

664

665

666

667

668

669

670

671

672

673

674

675

676

677

678

679

680

681

682

683

684

685

686

687

688

689

690

691

692

693

694

695

696

697

698

699

700

701

702

703

704

705

706

707

708

709

710

711

712

713

714

715

716

717

718

719

720

721

722

723

724

725

726

727

728

729

730

731

732

733

734

735

736

737

738

739

740

741

742

743

744

745

746

747

748

749

750

751

752

753

754

755

756

757

758

759

760

761

762

763

764

765

766

767

768

769

770

771

772

773

774

775

776

777

778

779

780

781

782

783

784

785

786

787

788

789

790

791

792

793

794

795

796

797

798

799

800

801

802

803

804

805

806

807

808

809

810

811

812

813

814

815

816

817

818

819

820

821

822

823

824

825

826

827

828

829

830

831

832

833

834

835

836

837

838

839

840

841

842

843

844

845

846

847

848

849

850

851

852

853

854

855

856

857

858

859

860

861

862

863

864

865

866

867

868

869

870

871

872

873

874

875

876

877

878

879

880

881

882

883

884

885

886

887

888

889

890

891

892

893

894

895

896

897

898

899

900

901

902

903

904

905

906

907

908

909

910

911

912

913

914

915

916

917

918

919

920

921

922

923

924

925

926

927

928

929

930

931

932

933

934

935

936

937

938

939

940

941

942

943

944

945

946

947

948

949

950

951

952

953

954

955

956

957

958

959

960

961

962

963

964

965

966

967

968

969

970

971

972

973

974

975

976

977

978

979

980

981

982

983

984

985

986

987

988

989

990

991

992

993

994

995

996

997

998

999

1000

package org.json;

Permission is hereby granted, free of charge, to any person obtaining a copy

of this software and associated documentation files (the "Software"), to deal

in the Software without restriction, including without limitation the rights

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

copies of the Software, and to permit persons to whom the Software is

furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all

copies or substantial portions of the Software.

The Software shall be used for Good, not Evil.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

SOFTWARE.

import org.json.util.ALStack;

import java.io.Closeable;

import java.io.IOException;

import java.lang.reflect.Array;

import java.lang.reflect.Method;

import java.lang.reflect.Modifier;

import java.util.Arrays;

import java.util.Collection;

import java.util.HashSet;

import java.util.Iterator;

import java.util.Map;

import java.util.Map.Entry;

import java.util.Set;

/**

* JSONWriter provides a quick and convenient way of producing JSON text.

* The texts produced strictly conform to JSON syntax rules. No whitespace is

* added, so the results are ready for transmission or storage. Each instance of

* JSONWriter can produce one JSON text.

*

* A JSONWriter instance provides a <code>value</code> method for appending

* values to the

* text, and a <code>key</code>

* method for adding keys before values in objects. There are <code>array</code>

* and <code>endArray</code> methods that make and bound array values, and

* <code>object</code> and <code>endObject</code> methods which make and bound

* object values. All of these methods return the JSONWriter instance,

* permitting a cascade style. For example, <pre>

* new JSONWriter(myWriter)

* .object()

* .key("JSON")

* .value("Hello, World!")

* .endObject();</pre> which writes <pre>

* {"JSON":"Hello, World!"}</pre>

*

* The first method called must be <code>array</code> or <code>object</code>.

* There are no methods for adding commas or colons. JSONWriter adds them for

* you. Objects and arrays can be nested arbitrarily deep.

*

* This can sometimes be easier than using a JSONObject to build a string.

* @author JSON.org

* @version 2016-08-04

public class JSONWriter implements Closeable {

private static final int initdepth = 16;

/**

* The comma flag determines if a comma should be output before the next

* value.

private boolean comma;

/**

* The current mode. Values:

* 'a' (array),

* 'd' (done),

* 'i' (initial),

* 'k' (key),

* 'o' (object).

protected char mode;

/**

* The object/array stack, for duplicate key detection.

* Arrays are represented as null elements, while objects are

* represented as sets of key strings.

private final ALStack<Set<String>> stack;

/**

* The writer that will receive the output.

protected final Appendable writer;

/**

* Make a fresh JSONWriter. It can be used to build one JSON text.

* @param w the Writer to which JSON content will be written

public JSONWriter(Appendable w) {

this.comma = false;

this.mode = 'i';

this.stack = new ALStack<Set<String>>(initdepth);

this.writer = w;

}

/**

* Prepare for the next value to be written. Append a comma if required,

* assert and advance the mode as needed.

private void prepValue() throws JSONException {

try {

switch (this.mode) {

case 'a':

if (this.comma) {

this.writer.append(',');

}

break;

case 'o':

this.mode = 'k';

break;

default:

throw new JSONException("Value out of sequence.");

}

this.comma = true;

} catch (IOException e) {

throw new JSONException(e);

}

/**

* Begin appending a new array. All values until the balancing

* <code>endArray</code> will be appended to this array. The

* <code>endArray</code> method must be called to mark the array's end.

* @return this

* @throws JSONException If the nesting is too deep, or if the object is

* started in the wrong place (for example as a key or after the end of the

* outermost array or object).

public JSONWriter array() throws JSONException {

if (this.mode == 'i' || this.mode == 'o' || this.mode == 'a') {

this.push(false);

try {

this.prepValue();

this.writer.append('[');

} catch (IOException e) {

throw new JSONException(e);

}

this.comma = false;

return this;

}

throw new JSONException("Misplaced array.");

}

/**

* End something.

* @param mode Mode

* @param c Closing character

* @return this

* @throws JSONException If unbalanced.

private JSONWriter end(char mode, char c) throws JSONException {

if (this.mode != mode) {

throw new JSONException(mode == 'a'

? "Misplaced endArray."

: "Misplaced endObject.");

}

this.pop(mode);

try {

this.writer.append(c);

} catch (IOException e) {

throw new JSONException(e);

}

this.comma = true;

return this;

}

/**

* End an array. This method most be called to balance calls to

* <code>array</code>.

* @return this

* @throws JSONException If incorrectly nested.

public JSONWriter endArray() throws JSONException {

return this.end('a', ']');

}

/**

* End an object. This method most be called to balance calls to

* <code>object</code>.

* @return this

* @throws JSONException If incorrectly nested.

public JSONWriter endObject() throws JSONException {

return this.end('k', '}');

}

/**

* Append a key. The key will be associated with the next value. In an

* object, every value must be preceded by a key.

* @param string A key string.

* @return this

* @throws JSONException If the key is out of place. For example, keys

* do not belong in arrays or if the key is null.

public JSONWriter key(String string) throws JSONException {

if (string == null) {

throw new JSONException("Null key.");

}

if (this.mode == 'k') {

try {

if(!this.stack.peek().add(string)) {

throw new JSONException("Duplicate key \"" + string + "\"");

}

if (this.comma) {

this.writer.append(',');

}

writeString(string, this.writer).append(':');

this.comma = false;

this.mode = 'o';

return this;

} catch (IOException e) {

throw new JSONException(e);

}

throw new JSONException("Misplaced key.");

}

/**

* Begin appending a new object. All keys and values until the balancing

* <code>endObject</code> will be appended to this object. The

* <code>endObject</code> method must be called to mark the object's end.

* @return this

* @throws JSONException If the nesting is too deep, or if the object is

* started in the wrong place (for example as a key or after the end of the

* outermost array or object).

public JSONWriter object() throws JSONException {

if (this.mode == 'i') {

this.mode = 'o';

}

if (this.mode == 'o' || this.mode == 'a') {

try {

this.prepValue();

this.writer.append('{');

} catch (IOException e) {

throw new JSONException(e);

}

this.push(true);

this.comma = false;

return this;

}

throw new JSONException("Misplaced object.");

}

/**

* Pop an array or object scope.

* @param c The scope to close.

* @throws JSONException If nesting is wrong.

private void pop(char c) throws JSONException {

if (this.stack.isEmpty()) {

throw new JSONException("Nesting error.");

}

char m = this.stack.pop() == null ? 'a' : 'k';

if (m != c) {

throw new JSONException("Nesting error.");

}

this.mode = this.stack.isEmpty()

? 'd'

: this.stack.peek() == null

? 'a'

: 'k';

}

/**

* Push an object or array scope.

* @param obj {@code true} to indicate an Object, otherwise {@code false}

* to indicate an Array

* @throws JSONException If nesting is too deep.

private void push(boolean obj) throws JSONException {

this.stack.push(obj ? new HashSet<String>() : null);

this.mode = obj ? 'k' : 'a';

}

/**

* Append a <code>null</code> value.

* @return this

* @throws JSONException there was a problem writing the null value

public JSONWriter nullValue() throws JSONException {

this.prepValue();

writeNull(this.writer);

return this;

}

/**

* Append either the value <code>true</code> or the value

* <code>false</code>.

* @param b A boolean.

* @return this

* @throws JSONException there was a problem writing the boolean value

public JSONWriter value(boolean b) throws JSONException {

String string = Boolean.toString(b);

try {

this.prepValue();

this.writer.append(string);

return this;

} catch (IOException e) {

throw new JSONException(e);

}

/**

* Append a double value.

* @param d A double.

* @return this

* @throws JSONException If the number is not finite.

public JSONWriter value(double d) throws JSONException {

this.prepValue();

writeDouble(d, this.writer);

return this;

}

/**

* Append a long value.

* @param l A long.

* @return this

* @throws JSONException there was a problem writing the long value

public JSONWriter value(long l) throws JSONException {

String string = Long.toString(l);

try {

this.prepValue();

this.writer.append(string);

return this;

} catch (IOException e) {

throw new JSONException(e);

}

/**

* Append an object value.

* @param object The object to appendString. It can be null, or a Boolean, Number,

* String, JSONObject, or JSONArray, or an object that implements JSONString.

* @return this

* @throws JSONException If the value is out of sequence.

public JSONWriter value(Object object) throws JSONException {

this.prepValue();

writeValue(object, this.writer);

return this;

}

/**

* Append a sequence of values into an array.

* @param values The objects to appendString. They can be null, or a Boolean, Number,

* String, JSONObject, or JSONArray, or an object that implements JSONString.

* @return this

* @throws JSONException If a value is out of place. For example, a value

* occurs where a key is expected.

public JSONWriter values(Iterable<?> values) throws JSONException {

for(Object obj : values) {

this.prepValue();

writeValue(obj, this.writer);

}

return this;

}

/**

* Append a sequence of keys and values in an object.

* The key will be associated with the corresponding value. In an

* object, every value must be associated with a key.

* @param kvPairs The objects to appendString. The values can be null, or a Boolean,

* Number, String, JSONObject, or JSONArray, or an object that implements

* JSONString.

* @return this

* @throws JSONException If a key or value is out of place. For example, keys

* do not belong in arrays or if the key is null.

public JSONWriter entries(Map<?, ?> kvPairs) throws JSONException {

for(Entry<?, ?> entry : kvPairs.entrySet()) {

this.key(String.valueOf(entry.getKey()));

this.prepValue();

writeValue(entry.getValue(), this.writer);

}

return this;

}

/**

* Asserts the JSON writer is finished, and close any underlying

* {@code Closeable} writer.

* @throws IOException the writer cannot be closed

@Override

public void close() throws IOException {

if(!this.stack.isEmpty()) {

throw new IOException("JSON stack is not empty");

}

if(writer instanceof Closeable) {

((Closeable)writer).close();

}

// -- static writer methods

// 120 spaces, divides by 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, ...

private static final String PADDING_SPACES = makePaddingSpaces();

private static final int PADDING_LENGTH = 120;

private static String makePaddingSpaces() {

char[] padding = new char[PADDING_LENGTH];

Arrays.fill(padding, ' ');

return String.valueOf(padding);

}

/**

* Indent by the given number of spaces.

* @param indent

* the number of character to indent.

* @param writer

* the writer.

* @param <T>

* A subtype of {@code Appendable}, returned to the caller

* for chaining purposes

* @return The writer.

* @throws IOException there was a problem writing the indentation

static <T extends Appendable> T indent(int indent, T writer) throws IOException {

while(indent >= PADDING_LENGTH) {

writer.append(PADDING_SPACES);

indent -= PADDING_LENGTH;

}

if(indent > 0) {

writer.append(PADDING_SPACES, 0, indent);

}

return writer;

}

/**

* Write the contents of the Object as JSON text to a writer. For

* compactness, no whitespace is added.

*

* Warning: This method assumes that the data structure is acyclical.

* @param value

* The value to be written

* @param writer

* Writes the serialized JSON

* @param <T>

* A subtype of {@code Appendable}, returned to the caller

* for chaining purposes

* @return The writer.

* @throws JSONException there was a problem writing the Object

static <T extends Appendable> T writeValue(Object value, T writer)

throws JSONException {

return writeValue(value, writer, 0, 0);

}

/**

* Write the contents of the Object as JSON text to a writer.

*

* Warning: This method assumes that the data structure is acyclical.

* @param value

* The value to be written

* @param writer

* Writes the serialized JSON

* @param indentFactor

* The number of spaces to add to each level of indentation.

* @param indent

* The indention of the top level.

* @param <T>

* A subtype of {@code Appendable}, returned to the caller

* for chaining purposes

* @return The writer.

* @throws JSONException there was a problem writing the Object

static <T extends Appendable> T writeValue(Object value, T writer,

int indentFactor, int indent) throws JSONException {

if ((value == null) || JSONObject.NULL.equals(value)) {

return writeNull(writer);

}

if (value instanceof JSONAppendable) {

return writeJSONAppendable((JSONAppendable) value, writer);

}

if (value instanceof JSONString) {

return writeJSONString((JSONString) value, writer);

}

if (value instanceof JSONObject) {

return writeJSONObject((JSONObject) value, writer, indentFactor, indent);

}

if (value instanceof JSONArray) {

return writeJSONArray((JSONArray) value, writer, indentFactor, indent);

}

if (value instanceof Number) {

return writeNumber((Number) value, writer);

}

if (value instanceof Boolean) {

return writeBoolean((Boolean) value, writer);

}

if (value instanceof CharSequence) {

return writeString((CharSequence) value, writer);

}

if (value instanceof Map) {

return writeMap((Map<?, ?>) value, writer, indentFactor, indent);

}

if (value instanceof Iterable) {

return writeIterable((Iterable<?>) value, writer, indentFactor, indent);

}

if (value.getClass().isArray()) {

return writeArray(value, writer, indentFactor, indent);

}

if (value instanceof Enum<?>) {

return writeEnum((Enum<?>) value, writer);

}

if (JSONObject.objectIsBean(value)) {

return writeBean(value, writer, indentFactor, indent);

}

return writeString(value.toString(), writer);

}

/**

* Write the JSONAppendable as a JSON value to a writer.

*

* Warning: This method assumes that the data structure is acyclical.

* @param value

* The JSONString to be written

* @param writer

* Writes the serialized JSON

* @param <T> a subtype of {@code Appendable}, returned to the caller

* for chaining purposes

* @return The writer.

* @throws JSONException there was a problem writing the JSONAppendable

static <T extends Appendable> T writeJSONAppendable(JSONAppendable value,

T writer) throws JSONException {

try {

value.appendJSON(writer);

return writer;

} catch(JSONException e) {

// Propagate directly, because JSONException is a RuntimeException

throw e;

} catch(IOException e) {

throw new JSONException(e);

} catch(RuntimeException e) {

throw new JSONException(e);

}

/**

* Write the contents of the JSONString as a JSON value to a writer.

*

* Warning: This method assumes that the data structure is acyclical.

* @param value

* The JSONString to be written

* @param writer

* Writes the serialized JSON

* @param <T> a subtype of {@code Appendable}, returned to the caller

* for chaining purposes

* @return The writer.

* @throws JSONException there was a problem writing the JSONString

static <T extends Appendable> T writeJSONString(JSONString value, T writer)

throws JSONException {

try {

String o = value.toJSONString();

if (o != null) {

writer.append(o);

} else {

writeString(value.toString(), writer);

}

return writer;

} catch(JSONException e) {

// Propagate directly, because JSONException is a RuntimeException

throw e;

} catch (IOException e) {

throw new JSONException(e);

} catch (RuntimeException e) {

throw new JSONException(e);

}

/**

* Write the contents of the JavaBean as JSON object to a writer.

*

* Warning: This method assumes that the data structure is acyclical.

* @param bean

* The bean to be written

* @param writer

* Writes the serialized JSON

* @param indentFactor

* The number of spaces to add to each level of indentation.

* @param indent

* The indention of the top level.

* @param <T>

* A subtype of {@code Appendable}, returned to the caller

* for chaining purposes

* @return The writer.

* @throws JSONException there was a problem writing the bean

static <T extends Appendable> T writeBean(Object bean, T writer,

int indentFactor, int indent) throws JSONException {

try {

final int newindent = indent + indentFactor;

Class<?> klass = bean.getClass();

// If klass is a System class then set includeSuperClass to false.

boolean includeSuperClass = klass.getClassLoader() != null;

Method[] methods = includeSuperClass ? klass.getMethods()

: klass.getDeclaredMethods();

boolean commanate = false;

writer.append('{');

for (int i = 0; i < methods.length; i += 1) {

try {

Method method = methods[i];

if (Modifier.isPublic(method.getModifiers()) &&

!Modifier.isStatic(method.getModifiers()) &&

!method.isSynthetic() &&

(method.getReturnType() != Void.TYPE)) {

String name = method.getName();

String key = JSONObject.keyFromMethodName(name);

if ((key != null)

&& (method.getParameterTypes().length == 0)) {

Object result = method.invoke(bean, (Object[]) null);

if (result != null) {

if (commanate) {

writer.append(',');

}

if (indentFactor > 0) {

writer.append('\n');

}

indent(newindent, writer);

writeString(String.valueOf(key), writer).append(':');

if (indentFactor > 0) {

writer.append(' ');

}

writeValue(result, writer, indentFactor, newindent);

commanate = true;

}

} catch (Exception ignore) {

}

if(commanate) {

if (indentFactor > 0) {

writer.append('\n');

}

indent(indent, writer);

}

writer.append('}');

return writer;

} catch (IOException exception) {

throw new JSONException(exception);

} catch (RuntimeException exception) {

throw new JSONException(exception);

}

/**

* Write the contents of the Map as JSON object to a writer.

*

* Warning: This method assumes that the data structure is acyclical.

* @param map

* The Map to be written

* @param writer

* Writes the serialized JSON

* @param indentFactor

* The number of spaces to add to each level of indentation.

* @param indent

* The indention of the top level.

* @param <T>

* A subtype of {@code Appendable}, returned to the caller

* for chaining purposes

* @return The writer.

* @throws JSONException there was a problem writing the Map

static <T extends Appendable> T writeMap(Map<?, ?> map, T writer,

int indentFactor, int indent) throws JSONException {

try {

boolean commanate = false;

final int length = map.size();

Iterator<?> keys = map.keySet().iterator();

writer.append('{');

if (length == 1) {

Object key = keys.next();

writeString(String.valueOf(key), writer).append(':');

if (indentFactor > 0) {

writer.append(' ');

}

writeValue(map.get(key), writer, indentFactor, indent);

} else if (length != 0) {

final int newindent = indent + indentFactor;

while (keys.hasNext()) {

Object key = keys.next();

if (commanate) {

writer.append(',');

}

if (indentFactor > 0) {

writer.append('\n');

}

indent(newindent, writer);

writeString(String.valueOf(key), writer).append(':');

if (indentFactor > 0) {

writer.append(' ');

}

writeValue(map.get(key), writer, indentFactor, newindent);

commanate = true;

}

if (indentFactor > 0) {

writer.append('\n');

}

indent(indent, writer);

}

writer.append('}');

return writer;

} catch (IOException exception) {

throw new JSONException(exception);

}

/**

* Determine whether this Iterable has exactly one element. If the

* Iterable is a Collection, just check the {@code size()} method.

* Otherwise, start iterating until we determine whether there is

* more than one element.

* @param iterable the Iterable

* @return {@code true} if there is exactly one element, otherwise

* {@code false}

private static boolean singleIterableElement(Iterable<?> iterable) {

if(iterable instanceof Collection) {

return ((Collection)iterable).size() == 1;

}

Iterator<?> iterator = iterable.iterator();

if(!iterator.hasNext()) {

return false;

}

iterator.next();

return !iterator.hasNext();

}

/**

* Write the contents of the Iterable as JSON array to a writer.

*

* Warning: This method assumes that the data structure is acyclical.

* @param collection

* The Iterable to be written

* @param writer

* Writes the serialized JSON

* @param indentFactor

* The number of spaces to add to each level of indentation.

* @param indent

* The indention of the top level.

* @param <T> a subtype of {@code Appendable}, returned to the caller

* for chaining purposes

* @return The writer.

* @throws JSONException there was a problem writing the Iterable

static <T extends Appendable> T writeIterable(Iterable<?> collection, T writer,

int indentFactor, int indent) throws JSONException {

try {

boolean singleElement = singleIterableElement(collection);

Iterator<?> iterator = collection.iterator();

boolean commanate = false;

writer.append('[');

if ((singleElement) && (iterator.hasNext())) {

writeValue(iterator.next(), writer,

indentFactor, indent);

} else if (iterator.hasNext()) {

final int newindent = indent + indentFactor;

while (iterator.hasNext()) {

if (commanate) {

writer.append(',');

}

if (indentFactor > 0) {

writer.append('\n');

}

indent(newindent, writer);

writeValue(iterator.next(), writer,

indentFactor, newindent);

commanate = true;

}

if (indentFactor > 0) {

writer.append('\n');

}

indent(indent, writer);

}

writer.append(']');

return writer;

} catch (IOException e) {

throw new JSONException(e);

}

/**

* Write the contents of the array as JSON array to a writer.

*

* Warning: This method assumes that the data structure is acyclical.

* @param array

* The array to be written

* @param writer

* Writes the serialized JSON

* @param indentFactor

* The number of spaces to add to each level of indentation.

* @param indent

* The indention of the top level.

* @param <T> a subtype of {@code Appendable}, returned to the caller

* for chaining purposes

* @return The writer.

* @throws JSONException there was a problem writing the array

static <T extends Appendable> T writeArray(Object array, T writer,

int indentFactor, int indent) throws JSONException {

try {

final int length = Array.getLength(array);

boolean commanate = false;

writer.append('[');

if (length == 1) {

writeValue(Array.get(array, 0), writer,

indentFactor, indent);

} else if (length != 0) {

final int newindent = indent + indentFactor;

for (int i = 0; i < length; i += 1) {

if (commanate) {

writer.append(',');

}

if (indentFactor > 0) {

writer.append('\n');

}

indent(newindent, writer);

writeValue(Array.get(array, i), writer,

indentFactor, newindent);

commanate = true;

}

if (indentFactor > 0) {

writer.append('\n');

}

indent(indent, writer);

}

writer.append(']');

return writer;

} catch (IOException e) {

throw new JSONException(e);

}

/**

* Write the given Enum to the given Appendable as a String.

* @param <T> subtype of Appendable, returned to the caller

* @param value

* An Enum

* @param writer

* The Appendable to which the Enum value is written

* @return the given Appendable

* @throws JSONException there was a problem writing the Enum

static <T extends Appendable> T writeEnum(Enum<?> value, T writer)

throws JSONException {

return writeString(value.name(), writer);

}

/**

* Write the contents of the JSONObject as JSON object to a writer.

*

* Warning: This method assumes that the data structure is acyclical.

* @param object

* The JSONObject to be written

* @param writer

* Writes the serialized JSON

* @param indentFactor

* The number of spaces to add to each level of indentation.

* @param indent

* The indention of the top level.

* @param <T>

* A subtype of {@code Appendable}, returned to the caller

* for chaining purposes

* @return The writer.

* @throws JSONException there was a problem writing the JSONObject

static <T extends Appendable> T writeJSONObject(JSONObject object, T writer,

int indentFactor, int indent) throws JSONException {

try {

boolean commanate = false;

final int length = object.length();

Iterator<String> keys = object.keys();

writer.append('{');

if (length == 1) {

String key = keys.next();

writeString(key, writer).append(':');

if (indentFactor > 0) {

writer.append(' ');

}

writeValue(object.opt(key), writer, indentFactor, indent);

} else if (length != 0) {

final int newindent = indent + indentFactor;

while (keys.hasNext()) {

String key = keys.next();

if (commanate) {

writer.append(',');

}

if (indentFactor > 0) {

writer.append('\n');

}

indent(newindent, writer);

writeString(key, writer).append(':');

if (indentFactor > 0) {

writer.append(' ');

}

writeValue(object.opt(key), writer, indentFactor, newindent);

commanate = true;

}

if (indentFactor > 0) {

writer.append('\n');

}

indent(indent, writer);

}

writer.append('}');

return writer;

} catch (IOException exception) {

throw new JSONException(exception);

}

/**

* Write the contents of the JSONArray as JSON array to a writer.

*

* Warning: This method assumes that the data structure is acyclical.

* @param array

* The JSONArray to be written

* @param writer

* Writes the serialized JSON

* @param indentFactor

* The number of spaces to add to each level of indentation.

* @param indent

* The indention of the top level.

* @param <T> a subtype of {@code Appendable}, returned to the caller

* for chaining purposes

* @return The writer.

* @throws JSONException there was a problem writing the JSONArray

static <T extends Appendable> T writeJSONArray(JSONArray array, T writer,

int indentFactor, int indent) throws JSONException {

try {

boolean commanate = false;

int length = array.length();

writer.append('[');

if (length == 1) {

writeValue(array.get(0), writer, indentFactor, indent);

} else if (length != 0) {

final int newindent = indent + indentFactor;

for (int i = 0; i < length; i += 1) {

if (commanate) {

writer.append(',');

}

if (indentFactor > 0) {

View remainder of file in raw view

JSON-java/JSONWriter.java at writeable · run2000/JSON-java · GitHub

Expand file tree

Breadcrumbs

JSONWriter.java

Latest commit

History

Breadcrumbs

JSONWriter.java

File metadata and controls