Scripting in Java: Integrating with Groovy and JavaScript

Contents at a Glance......Page 3
Contents......Page 361
About the Author......Page 370
About the Technical Reviewers......Page 371
Acknowledgments......Page 372
Introduction......Page 4
 What Is Scripting in Java?......Page 7
 Executing Your First Script......Page 9
 Using the jjs Command-line Tool......Page 11
 Printing Text in Nashorn......Page 12
 Using Other Scripting Languages......Page 13
  The ScriptEngine and ScriptEngineFactory Interfaces......Page 17
  The Bindings Interface and the SimpleBindings Class......Page 18
 Discovering and Instantiating ScriptEngines......Page 19
 Summary......Page 21
 Using the eval( ) Method......Page 22
  Passing Parameters from Java Code to Scripts......Page 24
  Passing Parameters from Scripts to Java Code......Page 27
 Summary......Page 28
  Bindings......Page 29
  Scope......Page 31
  Defining the Script Context......Page 32
  Putting Them Together......Page 37
 Using a Custom ScriptContext......Page 44
 Return Value of the eval( ) Method......Page 47
 Reserved Keys for Engine Scope Bindings......Page 49
 Changing the Default ScriptContext......Page 50
 Sending Scripts Output to a File......Page 51
 Summary......Page 53
Chapter 4: Writing Scripts in Nashorn......Page 54
 Strict and Nonstrict Modes......Page 55
 Identifiers......Page 56
 Comments......Page 57
 Declaring Variables......Page 58
  The Undefined Type......Page 59
  The Number Type......Page 60
  The String Type......Page 61
 Operators......Page 64
  To Boolean Conversion......Page 69
  To Number Conversion......Page 71
  To String Conversion......Page 72
 Statements......Page 74
  Block Statement......Page 77
  Expression Statement......Page 78
  The if Statement......Page 79
  Iteration Statements......Page 80
  The continue, break, and return Statements......Page 82
  The with Statement......Page 83
  The switch Statement......Page 84
  Labelled Statements......Page 85
  The try Statement......Page 86
  The debugger Statement......Page 90
  Function Declaration......Page 91
   Working with Function Arguments......Page 93
  Function Expression......Page 95
  The Function( ) Constructor......Page 98
 The Object Type......Page 99
  Using an Object Literal......Page 100
   Accessing Object’s Properties......Page 101
   Defining Accessor Properties......Page 105
   Setting Property Attributes......Page 106
  Using a Constructor Function......Page 111
  Object Inheritance......Page 116
  Using Object.create( ) Method......Page 126
 Binding Object Properties......Page 127
 Locking Objects......Page 131
 Accessing Missing Properties......Page 132
 Serializing Objects......Page 134
 Dynamically Evaluating Scripts......Page 135
 Variable Scoping and Hoisting......Page 136
  The Object Object......Page 139
  The Function Object......Page 142
  The String Object......Page 146
  The Number Object......Page 148
  The Boolean Object......Page 150
  The Date Object......Page 151
  The Math Object......Page 153
  The RegExp Object......Page 154
  Knowing Script Location......Page 165
  The parseInt( ) Function......Page 166
  The parseFloat() Function......Page 167
  The isNaN() Function......Page 168
  The decodeURI( ) Function......Page 169
  The encodeURI( ) Function......Page 170
  The load( ) and loadWithNewGlobal Functions......Page 171
 Summary......Page 175
 Invoking Procedures in Scripts......Page 177
 Implementing Java Interfaces in Scripts......Page 183
 Using Compiled Scripts......Page 189
 Summary......Page 191
 Importing Java Types......Page 193
  Using the Java Global Object......Page 194
  Using the importPackage() and importClass() Functions......Page 195
 Creating and Using Java Objects......Page 197
 Using Overloaded Java Methods......Page 199
 Using Java Arrays......Page 201
  Using a Script Object......Page 203
  Using the JavaAdapter Object......Page 205
  Using the Java.extend() Method......Page 206
  Accessing Methods of a Superclass......Page 208
 Using Lambda Expressions......Page 210
 Summary......Page 211
 What Is an Array in Nashorn?......Page 212
  Using an Array Literal......Page 213
  Using the Array Object......Page 219
  Passing One Argument......Page 220
  Passing Two or More Arguments......Page 221
 Deleting Array Elements......Page 222
 Length of an Array......Page 223
  Using the for Loop......Page 224
  Using the forEach() Method......Page 226
  Using the for-in Loop......Page 227
 Checking for an Array......Page 228
 Methods of the Array Object......Page 229
  Reversing Array Elements......Page 230
  Splicing an Array......Page 231
  Sorting an Array......Page 232
  Adding and Removing Elements at Ends......Page 233
  Searching an Array......Page 236
  Evaluating Predicates......Page 237
 Stream-Like Processing of Arrays......Page 238
 Array-Like Objects......Page 241
  The ArrayBuffer Object......Page 243
  Views of an ArrayBuffer......Page 244
   Typed Arrays......Page 245
   DataView View......Page 250
  Using a Java List as a Nashorn Array......Page 252
  Using a Java Map as a Nashorn Object......Page 254
 Using Java Arrays......Page 255
 Arrays to Java Collections Conversions......Page 259
 Summary......Page 261
 Introduction......Page 263
 The Expression Class......Page 265
  The parse() Method......Page 269
 The JKScriptEngine Class......Page 270
 The JKScriptEngineFactory Class......Page 272
 Preparing for Deployment......Page 274
 Using the JKScript Script Engine......Page 275
 Summary......Page 279
 The Syntax......Page 280
  Batch Mode......Page 282
  Interactive Mode......Page 283
 Using Other Script Engines......Page 284
 Passing Arguments to Scripts......Page 285
 Global Functions......Page 286
 Summary......Page 292
 The Syntax......Page 293
 The Options......Page 294
 Using jjs in Interactive Mode......Page 297
 Passing Arguments to jjs......Page 298
 Using jjs in Scripting Mode......Page 299
 Summary......Page 304
 Structure of JavaFX Applications in Scripts......Page 305
 Importing JavaFX Types......Page 312
 Summary......Page 316
 What Are Java APIs for Nashorn?......Page 317
 Instantiating the Nashorn Engine......Page 320
 Sharing the Engine Globals......Page 321
 Using Script Objects in Java Code......Page 325
  Using Properties of Script Objects......Page 328
  Creating Nashorn Objects in Java......Page 332
  Invoking Script Functions From Java......Page 335
  Converting Script Dates to Java Dates......Page 338
 Summary......Page 339
Chapter 13: Debugging, Tracing, and Profiling Scripts......Page 340
 Debugging Standalone Scripts......Page 341
 Debugging Scripts from Java Code......Page 344
 Tracing and Profiling Scripts......Page 348
 Summary......Page 351
Index......Page 352