jsinterop.base

Class Js

java.lang.Object

jsinterop.base.Js

public final class Js
extends java.lang.Object

Utilities to provide access to JavaScript language constructs that are not available in pure Java.

Note that this class avoids providing replacements for stuff that is already available via a pure Java or Elemental and enforce safe (runtime-checked) coding practices.

Method Summary

Modifier and Type	Method and Description
static JsArrayLikeOfAny	arguments()
static <T> T	cast(java.lang.Object obj) Performs checked cast to lefthand-side type.
static Any[]	castToArray(java.lang.Object obj)
static boolean	castToBoolean(java.lang.Object obj)
static byte	castToByte(java.lang.Object obj)
static char	castToChar(java.lang.Object obj)
static double	castToDouble(java.lang.Object obj)
static float	castToFloat(java.lang.Object obj)
static int	castToInt(java.lang.Object obj)
static long	castToLong(java.lang.Object obj)
static short	castToShort(java.lang.Object obj)
static java.lang.String	castToString(java.lang.Object obj)
static void	debugger()
static boolean	isFalsy(java.lang.Object obj)
static boolean	isTripleEqual(java.lang.Object o1, java.lang.Object o2) Returns true if two objects are same.
static boolean	isTruthy(java.lang.Object obj)
static java.lang.String	typeof(java.lang.Object obj)
static <T> T	uncheckedCast(java.lang.Object obj) Performs unchecked cast to lefthand-side type.
static java.lang.Object	undefined()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

undefined

public static java.lang.Object undefined()

arguments

public static JsArrayLikeOfAny arguments()

debugger

public static void debugger()

typeof

public static java.lang.String typeof(java.lang.Object obj)

castToArray

public static Any[] castToArray(java.lang.Object obj)

castToString

public static java.lang.String castToString(java.lang.Object obj)

castToBoolean

public static boolean castToBoolean(java.lang.Object obj)

castToDouble

public static double castToDouble(java.lang.Object obj)

castToFloat

public static float castToFloat(java.lang.Object obj)

castToLong

public static long castToLong(java.lang.Object obj)

castToInt

public static int castToInt(java.lang.Object obj)

castToShort

public static short castToShort(java.lang.Object obj)

castToChar

public static char castToChar(java.lang.Object obj)

castToByte

public static byte castToByte(java.lang.Object obj)

cast

public static <T> T cast(java.lang.Object obj)

Performs checked cast to lefthand-side type. This is useful for cases when Java won't allow you otherwise, like casting from a native interface to a final Java type (like String).

uncheckedCast

public static <T> T uncheckedCast(java.lang.Object obj)

Performs unchecked cast to lefthand-side type. You should always prefer regular casting over this (unless you know what you are doing!).

isTruthy

public static boolean isTruthy(java.lang.Object obj)

isFalsy

public static boolean isFalsy(java.lang.Object obj)

isTripleEqual

public static boolean isTripleEqual(java.lang.Object o1,
                                    java.lang.Object o2)

Returns true if two objects are same.

This method mostly behaves similar to Java == operator except that it doesn't return true for null==undefined comparison.