JSON-java/JSONArray.java at master · bpbhat77/JSON-java · GitHub

History

1531 lines (1443 loc) · 50.6 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 java.io.IOException;

import java.io.StringWriter;

import java.io.Writer;

import java.lang.reflect.Array;

import java.math.BigDecimal;

import java.math.BigInteger;

import java.util.ArrayList;

import java.util.Collection;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

/**

* A JSONArray is an ordered sequence of values. Its external text form is a

* string wrapped in square brackets with commas separating the values. The

* internal form is an object having <code>get</code> and <code>opt</code>

* methods for accessing the values by index, and <code>put</code> methods for

* adding or replacing values. The values can be any of these types:

* <code>Boolean</code>, <code>JSONArray</code>, <code>JSONObject</code>,

* <code>Number</code>, <code>String</code>, or the

* <code>JSONObject.NULL object</code>.

*

* The constructor can convert a JSON text into a Java object. The

* <code>toString</code> method converts to JSON text.

*

* A <code>get</code> method returns a value if one can be found, and throws an

* exception if one cannot be found. An <code>opt</code> method returns a

* default value instead of throwing an exception, and so is useful for

* obtaining optional values.

*

* The generic <code>get()</code> and <code>opt()</code> methods return an

* object which you can cast or query for type. There are also typed

* <code>get</code> and <code>opt</code> methods that do type checking and type

* coercion for you.

*

* The texts produced by the <code>toString</code> methods strictly conform to

* JSON syntax rules. The constructors are more forgiving in the texts they will

* accept:

* <ul>

* <li>An extra <code>,</code> (comma) may appear just

* before the closing bracket.</li>

* <li>The <code>null</code> value will be inserted when there is <code>,</code>

*  (comma) elision.</li>

* <li>Strings may be quoted with <code>'</code> (single

* quote).</li>

* <li>Strings do not need to be quoted at all if they do not begin with a quote

* or single quote, and if they do not contain leading or trailing spaces, and

* if they do not contain any of these characters:

* <code>{ } [ ] / \ : , #</code> and if they do not look like numbers and

* if they are not the reserved words <code>true</code>, <code>false</code>, or

* <code>null</code>.</li>

* </ul>

* @author JSON.org

* @version 2016-08/15

public class JSONArray implements Iterable<Object> {

/**

* The arrayList where the JSONArray's properties are kept.

private final ArrayList<Object> myArrayList;

/**

* Construct an empty JSONArray.

public JSONArray() {

this.myArrayList = new ArrayList<Object>();

}

/**

* Construct a JSONArray from a JSONTokener.

* @param x

* A JSONTokener

* @throws JSONException

* If there is a syntax error.

public JSONArray(JSONTokener x) throws JSONException {

this();

if (x.nextClean() != '[') {

throw x.syntaxError("A JSONArray text must start with '['");

}

char nextChar = x.nextClean();

if (nextChar == 0) {

// array is unclosed. No ']' found, instead EOF

throw x.syntaxError("Expected a ',' or ']'");

}

if (nextChar != ']') {

x.back();

for (;;) {

if (x.nextClean() == ',') {

x.back();

this.myArrayList.add(JSONObject.NULL);

} else {

x.back();

this.myArrayList.add(x.nextValue());

}

switch (x.nextClean()) {

case 0:

// array is unclosed. No ']' found, instead EOF

throw x.syntaxError("Expected a ',' or ']'");

case ',':

nextChar = x.nextClean();

if (nextChar == 0) {

// array is unclosed. No ']' found, instead EOF

throw x.syntaxError("Expected a ',' or ']'");

}

if (nextChar == ']') {

return;

}

x.back();

break;

case ']':

return;

default:

throw x.syntaxError("Expected a ',' or ']'");

}

/**

* Construct a JSONArray from a source JSON text.

* @param source

* A string that begins with <code>[</code> (left

* bracket) and ends with <code>]</code>

*  (right bracket).

* @throws JSONException

* If there is a syntax error.

public JSONArray(String source) throws JSONException {

this(new JSONTokener(source));

}

/**

* Construct a JSONArray from a Collection.

* @param collection

* A Collection.

public JSONArray(Collection<?> collection) {

if (collection == null) {

this.myArrayList = new ArrayList<Object>();

} else {

this.myArrayList = new ArrayList<Object>(collection.size());

for (Object o: collection){

this.myArrayList.add(JSONObject.wrap(o));

}

/**

* Construct a JSONArray from an array

* @throws JSONException

* If not an array or if an array value is non-finite number.

public JSONArray(Object array) throws JSONException {

this();

if (array.getClass().isArray()) {

int length = Array.getLength(array);

this.myArrayList.ensureCapacity(length);

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

this.put(JSONObject.wrap(Array.get(array, i)));

}

} else {

throw new JSONException(

"JSONArray initial value should be a string or collection or array.");

}

@Override

public Iterator<Object> iterator() {

return this.myArrayList.iterator();

}

/**

* Get the object value associated with an index.

* @param index

* The index must be between 0 and length() - 1.

* @return An object value.

* @throws JSONException

* If there is no value for the index.

public Object get(int index) throws JSONException {

Object object = this.opt(index);

if (object == null) {

throw new JSONException("JSONArray[" + index + "] not found.");

}

return object;

}

/**

* Get the boolean value associated with an index. The string values "true"

* and "false" are converted to boolean.

* @param index

* The index must be between 0 and length() - 1.

* @return The truth.

* @throws JSONException

* If there is no value for the index or if the value is not

* convertible to boolean.

public boolean getBoolean(int index) throws JSONException {

Object object = this.get(index);

if (object.equals(Boolean.FALSE)

|| (object instanceof String && ((String) object)

.equalsIgnoreCase("false"))) {

return false;

} else if (object.equals(Boolean.TRUE)

|| (object instanceof String && ((String) object)

.equalsIgnoreCase("true"))) {

return true;

}

throw new JSONException("JSONArray[" + index + "] is not a boolean.");

}

/**

* Get the double value associated with an index.

* @param index

* The index must be between 0 and length() - 1.

* @return The value.

* @throws JSONException

* If the key is not found or if the value cannot be converted

* to a number.

public double getDouble(int index) throws JSONException {

Object object = this.get(index);

try {

return object instanceof Number ? ((Number) object).doubleValue()

: Double.parseDouble((String) object);

} catch (Exception e) {

throw new JSONException("JSONArray[" + index + "] is not a number.", e);

}

/**

* Get the float value associated with a key.

* @param index

* The index must be between 0 and length() - 1.

* @return The numeric value.

* @throws JSONException

* if the key is not found or if the value is not a Number

* object and cannot be converted to a number.

public float getFloat(int index) throws JSONException {

Object object = this.get(index);

try {

return object instanceof Number ? ((Number) object).floatValue()

: Float.parseFloat(object.toString());

} catch (Exception e) {

throw new JSONException("JSONArray[" + index

+ "] is not a number.", e);

}

/**

* Get the Number value associated with a key.

* @param index

* The index must be between 0 and length() - 1.

* @return The numeric value.

* @throws JSONException

* if the key is not found or if the value is not a Number

* object and cannot be converted to a number.

public Number getNumber(int index) throws JSONException {

Object object = this.get(index);

try {

if (object instanceof Number) {

return (Number)object;

}

return JSONObject.stringToNumber(object.toString());

} catch (Exception e) {

throw new JSONException("JSONArray[" + index + "] is not a number.", e);

}

/**

* Get the enum value associated with an index.

* @param clazz

* The type of enum to retrieve.

* @param index

* The index must be between 0 and length() - 1.

* @return The enum value at the index location

* @throws JSONException

* if the key is not found or if the value cannot be converted

* to an enum.

public <E extends Enum<E>> E getEnum(Class<E> clazz, int index) throws JSONException {

E val = optEnum(clazz, index);

if(val==null) {

// JSONException should really take a throwable argument.

// If it did, I would re-implement this with the Enum.valueOf

// method and place any thrown exception in the JSONException

throw new JSONException("JSONArray[" + index + "] is not an enum of type "

+ JSONObject.quote(clazz.getSimpleName()) + ".");

}

return val;

}

/**

* Get the BigDecimal value associated with an index.

* @param index

* The index must be between 0 and length() - 1.

* @return The value.

* @throws JSONException

* If the key is not found or if the value cannot be converted

* to a BigDecimal.

public BigDecimal getBigDecimal (int index) throws JSONException {

Object object = this.get(index);

try {

return new BigDecimal(object.toString());

} catch (Exception e) {

throw new JSONException("JSONArray[" + index +

"] could not convert to BigDecimal.", e);

}

/**

* Get the BigInteger value associated with an index.

* @param index

* The index must be between 0 and length() - 1.

* @return The value.

* @throws JSONException

* If the key is not found or if the value cannot be converted

* to a BigInteger.

public BigInteger getBigInteger (int index) throws JSONException {

Object object = this.get(index);

try {

return new BigInteger(object.toString());

} catch (Exception e) {

throw new JSONException("JSONArray[" + index +

"] could not convert to BigInteger.", e);

}

/**

* Get the int value associated with an index.

* @param index

* The index must be between 0 and length() - 1.

* @return The value.

* @throws JSONException

* If the key is not found or if the value is not a number.

public int getInt(int index) throws JSONException {

Object object = this.get(index);

try {

return object instanceof Number ? ((Number) object).intValue()

: Integer.parseInt((String) object);

} catch (Exception e) {

throw new JSONException("JSONArray[" + index + "] is not a number.", e);

}

/**

* Get the JSONArray associated with an index.

* @param index

* The index must be between 0 and length() - 1.

* @return A JSONArray value.

* @throws JSONException

* If there is no value for the index. or if the value is not a

* JSONArray

public JSONArray getJSONArray(int index) throws JSONException {

Object object = this.get(index);

if (object instanceof JSONArray) {

return (JSONArray) object;

}

throw new JSONException("JSONArray[" + index + "] is not a JSONArray.");

}

/**

* Get the JSONObject associated with an index.

* @param index

* subscript

* @return A JSONObject value.

* @throws JSONException

* If there is no value for the index or if the value is not a

* JSONObject

public JSONObject getJSONObject(int index) throws JSONException {

Object object = this.get(index);

if (object instanceof JSONObject) {

return (JSONObject) object;

}

throw new JSONException("JSONArray[" + index + "] is not a JSONObject.");

}

/**

* Get the long value associated with an index.

* @param index

* The index must be between 0 and length() - 1.

* @return The value.

* @throws JSONException

* If the key is not found or if the value cannot be converted

* to a number.

public long getLong(int index) throws JSONException {

Object object = this.get(index);

try {

return object instanceof Number ? ((Number) object).longValue()

: Long.parseLong((String) object);

} catch (Exception e) {

throw new JSONException("JSONArray[" + index + "] is not a number.", e);

}

/**

* Get the string associated with an index.

* @param index

* The index must be between 0 and length() - 1.

* @return A string value.

* @throws JSONException

* If there is no string value for the index.

public String getString(int index) throws JSONException {

Object object = this.get(index);

if (object instanceof String) {

return (String) object;

}

throw new JSONException("JSONArray[" + index + "] not a string.");

}

/**

* Determine if the value is <code>null</code>.

* @param index

* The index must be between 0 and length() - 1.

* @return true if the value at the index is <code>null</code>, or if there is no value.

public boolean isNull(int index) {

return JSONObject.NULL.equals(this.opt(index));

}

/**

* Make a string from the contents of this JSONArray. The

* <code>separator</code> string is inserted between each element. Warning:

* This method assumes that the data structure is acyclical.

* @param separator

* A string that will be inserted between the elements.

* @return a string.

* @throws JSONException

* If the array contains an invalid number.

public String join(String separator) throws JSONException {

int len = this.length();

StringBuilder sb = new StringBuilder();

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

if (i > 0) {

sb.append(separator);

}

sb.append(JSONObject.valueToString(this.myArrayList.get(i)));

}

return sb.toString();

}

/**

* Get the number of elements in the JSONArray, included nulls.

* @return The length (or size).

public int length() {

return this.myArrayList.size();

}

/**

* Get the optional object value associated with an index.

* @param index

* The index must be between 0 and length() - 1. If not, null is returned.

* @return An object value, or null if there is no object at that index.

public Object opt(int index) {

return (index < 0 || index >= this.length()) ? null : this.myArrayList

.get(index);

}

/**

* Get the optional boolean value associated with an index. It returns false

* if there is no value at that index, or if the value is not Boolean.TRUE

* or the String "true".

* @param index

* The index must be between 0 and length() - 1.

* @return The truth.

public boolean optBoolean(int index) {

return this.optBoolean(index, false);

}

/**

* Get the optional boolean value associated with an index. It returns the

* defaultValue if there is no value at that index or if it is not a Boolean

* or the String "true" or "false" (case insensitive).

* @param index

* The index must be between 0 and length() - 1.

* @param defaultValue

* A boolean default.

* @return The truth.

public boolean optBoolean(int index, boolean defaultValue) {

try {

return this.getBoolean(index);

} catch (Exception e) {

return defaultValue;

}

/**

* Get the optional double value associated with an index. NaN is returned

* if there is no value for the index, or if the value is not a number and

* cannot be converted to a number.

* @param index

* The index must be between 0 and length() - 1.

* @return The value.

public double optDouble(int index) {

return this.optDouble(index, Double.NaN);

}

/**

* Get the optional double value associated with an index. The defaultValue

* is returned if there is no value for the index, or if the value is not a

* number and cannot be converted to a number.

* @param index

* subscript

* @param defaultValue

* The default value.

* @return The value.

public double optDouble(int index, double defaultValue) {

Object val = this.opt(index);

if (JSONObject.NULL.equals(val)) {

return defaultValue;

}

if (val instanceof Number){

return ((Number) val).doubleValue();

}

if (val instanceof String) {

try {

return Double.parseDouble((String) val);

} catch (Exception e) {

return defaultValue;

}

return defaultValue;

}

/**

* Get the optional float value associated with an index. NaN is returned

* if there is no value for the index, or if the value is not a number and

* cannot be converted to a number.

* @param index

* The index must be between 0 and length() - 1.

* @return The value.

public float optFloat(int index) {

return this.optFloat(index, Float.NaN);

}

/**

* Get the optional float value associated with an index. The defaultValue

* is returned if there is no value for the index, or if the value is not a

* number and cannot be converted to a number.

* @param index

* subscript

* @param defaultValue

* The default value.

* @return The value.

public float optFloat(int index, float defaultValue) {

Object val = this.opt(index);

if (JSONObject.NULL.equals(val)) {

return defaultValue;

}

if (val instanceof Number){

return ((Number) val).floatValue();

}

if (val instanceof String) {

try {

return Float.parseFloat((String) val);

} catch (Exception e) {

return defaultValue;

}

return defaultValue;

}

/**

* Get the optional int value associated with an index. Zero is returned if

* there is no value for the index, or if the value is not a number and

* cannot be converted to a number.

* @param index

* The index must be between 0 and length() - 1.

* @return The value.

public int optInt(int index) {

return this.optInt(index, 0);

}

/**

* Get the optional int value associated with an index. The defaultValue is

* returned if there is no value for the index, or if the value is not a

* number and cannot be converted to a number.

* @param index

* The index must be between 0 and length() - 1.

* @param defaultValue

* The default value.

* @return The value.

public int optInt(int index, int defaultValue) {

Object val = this.opt(index);

if (JSONObject.NULL.equals(val)) {

return defaultValue;

}

if (val instanceof Number){

return ((Number) val).intValue();

}

if (val instanceof String) {

try {

return new BigDecimal(val.toString()).intValue();

} catch (Exception e) {

return defaultValue;

}

return defaultValue;

}

/**

* Get the enum value associated with a key.

* @param clazz

* The type of enum to retrieve.

* @param index

* The index must be between 0 and length() - 1.

* @return The enum value at the index location or null if not found

public <E extends Enum<E>> E optEnum(Class<E> clazz, int index) {

return this.optEnum(clazz, index, null);

}

/**

* Get the enum value associated with a key.

* @param clazz

* The type of enum to retrieve.

* @param index

* The index must be between 0 and length() - 1.

* @param defaultValue

* The default in case the value is not found

* @return The enum value at the index location or defaultValue if

* the value is not found or cannot be assigned to clazz

public <E extends Enum<E>> E optEnum(Class<E> clazz, int index, E defaultValue) {

try {

Object val = this.opt(index);

if (JSONObject.NULL.equals(val)) {

return defaultValue;

}

if (clazz.isAssignableFrom(val.getClass())) {

// we just checked it!

@SuppressWarnings("unchecked")

E myE = (E) val;

return myE;

}

return Enum.valueOf(clazz, val.toString());

} catch (IllegalArgumentException e) {

return defaultValue;

} catch (NullPointerException e) {

return defaultValue;

}

/**

* Get the optional BigInteger value associated with an index. The

* defaultValue is returned if there is no value for the index, or if the

* value is not a number and cannot be converted to a number.

* @param index

* The index must be between 0 and length() - 1.

* @param defaultValue

* The default value.

* @return The value.

public BigInteger optBigInteger(int index, BigInteger defaultValue) {

Object val = this.opt(index);

if (JSONObject.NULL.equals(val)) {

return defaultValue;

}

if (val instanceof BigInteger){

return (BigInteger) val;

}

if (val instanceof BigDecimal){

return ((BigDecimal) val).toBigInteger();

}

if (val instanceof Double || val instanceof Float){

return new BigDecimal(((Number) val).doubleValue()).toBigInteger();

}

if (val instanceof Long || val instanceof Integer

|| val instanceof Short || val instanceof Byte){

return BigInteger.valueOf(((Number) val).longValue());

}

try {

final String valStr = val.toString();

if(JSONObject.isDecimalNotation(valStr)) {

return new BigDecimal(valStr).toBigInteger();

}

return new BigInteger(valStr);

} catch (Exception e) {

return defaultValue;

}

/**

* Get the optional BigDecimal value associated with an index. The

* defaultValue is returned if there is no value for the index, or if the

* value is not a number and cannot be converted to a number.

* @param index

* The index must be between 0 and length() - 1.

* @param defaultValue

* The default value.

* @return The value.

public BigDecimal optBigDecimal(int index, BigDecimal defaultValue) {

Object val = this.opt(index);

if (JSONObject.NULL.equals(val)) {

return defaultValue;

}

if (val instanceof BigDecimal){

return (BigDecimal) val;

}

if (val instanceof BigInteger){

return new BigDecimal((BigInteger) val);

}

if (val instanceof Double || val instanceof Float){

return new BigDecimal(((Number) val).doubleValue());

}

if (val instanceof Long || val instanceof Integer

|| val instanceof Short || val instanceof Byte){

return new BigDecimal(((Number) val).longValue());

}

try {

return new BigDecimal(val.toString());

} catch (Exception e) {

return defaultValue;

}

/**

* Get the optional JSONArray associated with an index.

* @param index

* subscript

* @return A JSONArray value, or null if the index has no value, or if the

* value is not a JSONArray.

public JSONArray optJSONArray(int index) {

Object o = this.opt(index);

return o instanceof JSONArray ? (JSONArray) o : null;

}

/**

* Get the optional JSONObject associated with an index. Null is returned if

* the key is not found, or null if the index has no value, or if the value

* is not a JSONObject.

* @param index

* The index must be between 0 and length() - 1.

* @return A JSONObject value.

public JSONObject optJSONObject(int index) {

Object o = this.opt(index);

return o instanceof JSONObject ? (JSONObject) o : null;

}

/**

* Get the optional long value associated with an index. Zero is returned if

* there is no value for the index, or if the value is not a number and

* cannot be converted to a number.

* @param index

* The index must be between 0 and length() - 1.

* @return The value.

public long optLong(int index) {

return this.optLong(index, 0);

}

/**

* Get the optional long value associated with an index. The defaultValue is

* returned if there is no value for the index, or if the value is not a

* number and cannot be converted to a number.

* @param index

* The index must be between 0 and length() - 1.

* @param defaultValue

* The default value.

* @return The value.

public long optLong(int index, long defaultValue) {

Object val = this.opt(index);

if (JSONObject.NULL.equals(val)) {

return defaultValue;

}

if (val instanceof Number){

return ((Number) val).longValue();

}

if (val instanceof String) {

try {

return new BigDecimal(val.toString()).longValue();

} catch (Exception e) {

return defaultValue;

}

return defaultValue;

}

/**

* Get an optional {@link Number} value associated with a key, or <code>null</code>

* if there is no such key or if the value is not a number. If the value is a string,

* an attempt will be made to evaluate it as a number ({@link BigDecimal}). This method

* would be used in cases where type coercion of the number value is unwanted.

* @param index

* The index must be between 0 and length() - 1.

* @return An object which is the value.

public Number optNumber(int index) {

return this.optNumber(index, null);

}

/**

* Get an optional {@link Number} value associated with a key, or the default if there

* is no such key or if the value is not a number. If the value is a string,

* an attempt will be made to evaluate it as a number ({@link BigDecimal}). This method

* would be used in cases where type coercion of the number value is unwanted.

* @param index

* The index must be between 0 and length() - 1.

* @param defaultValue

* The default.

* @return An object which is the value.

public Number optNumber(int index, Number defaultValue) {

Object val = this.opt(index);

if (JSONObject.NULL.equals(val)) {

return defaultValue;

}

if (val instanceof Number){

return (Number) val;

}

if (val instanceof String) {

try {

return JSONObject.stringToNumber((String) val);

} catch (Exception e) {

return defaultValue;

}

return defaultValue;

}

/**

* Get the optional string value associated with an index. It returns an

* empty string if there is no value at that index. If the value is not a

* string and is not null, then it is converted to a string.

* @param index

* The index must be between 0 and length() - 1.

* @return A String value.

public String optString(int index) {

return this.optString(index, "");

}

/**

* Get the optional string associated with an index. The defaultValue is

* returned if the key is not found.

* @param index

* The index must be between 0 and length() - 1.

* @param defaultValue

* The default value.

* @return A String value.

public String optString(int index, String defaultValue) {

Object object = this.opt(index);

return JSONObject.NULL.equals(object) ? defaultValue : object

.toString();

}

/**

* Append a boolean value. This increases the array's length by one.

* @param value

* A boolean value.

* @return this.

public JSONArray put(boolean value) {

return this.put(value ? Boolean.TRUE : Boolean.FALSE);

}

/**

* Put a value in the JSONArray, where the value will be a JSONArray which

* is produced from a Collection.

* @param value

* A Collection value.

* @return this.

* @throws JSONException

* If the value is non-finite number.

public JSONArray put(Collection<?> value) {

return this.put(new JSONArray(value));

}

/**

* Append a double value. This increases the array's length by one.

* @param value

* A double value.

* @return this.

* @throws JSONException

* if the value is not finite.

public JSONArray put(double value) throws JSONException {

return this.put(Double.valueOf(value));

}

/**

* Append a float value. This increases the array's length by one.

* @param value

* A float value.

* @return this.

* @throws JSONException

* if the value is not finite.

public JSONArray put(float value) throws JSONException {

return this.put(Float.valueOf(value));

}

/**

View remainder of file in raw view

JSON-java/JSONArray.java at master · bpbhat77/JSON-java · GitHub

Expand file tree

Breadcrumbs

JSONArray.java

Latest commit

History

Breadcrumbs

JSONArray.java

File metadata and controls