com.alibaba.testable.agent.model

Enum WrapperType

java.lang.Object

java.lang.Enum<WrapperType>

com.alibaba.testable.agent.model.WrapperType

All Implemented Interfaces:

Serializable, Comparable<WrapperType>

public enum WrapperType
extends Enum<WrapperType>

simplified of sun.invoke.util.Wrapper

Enum Constant Summary

Enum Constants

Enum Constant and Description
BOOLEAN
BYTE
CHAR
DOUBLE
FLOAT
INT
LONG
OBJECT
SHORT
VOID

Method Summary

Modifier and Type	Method and Description
int	bitWidth() How many bits are in the wrapped value? Returns 0 for OBJECT or VOID.
boolean	isConvertibleFrom(WrapperType source) Does the JLS 5.1.2 allow a variable of this wrapper's primitive type to be assigned from a value of the given wrapper's primitive type? Cases: unboxing followed by widening primitive conversion any type converted to void (i.e., dropping a method call's value) boxing conversion followed by widening reference conversion to Object These are the cases allowed by MethodHandle.asType.
boolean	isDoubleWord() Does the wrapped value occupy two JVM stack slots?
boolean	isFloating() Is the wrapped type either float or double?
boolean	isIntegral() Is the wrapped type a primitive other than float, double, or void?
boolean	isNumeric() Is the wrapped type numeric (not void or object)?
boolean	isOther() Is the wrapped type either void or a reference?
boolean	isSigned()
boolean	isSingleWord() Does the wrapped value occupy a single JVM stack slot?
boolean	isSubwordOrInt() Is the wrapped type one of int, boolean, byte, char, or short?
boolean	isUnsigned()
int	stackSlots() How many JVM stack slots occupied by the wrapped value? Returns 0 for VOID.
static WrapperType	valueOf(String name) Returns the enum constant of this type with the specified name.
static WrapperType[]	values() Returns an array containing the constants of this enum type, in the order they are declared.
Object	wrap(int x) Wrap a value (an int or smaller value) in this wrapper's type.
Object	wrap(Object x) Wrap a value in this wrapper's type.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

BOOLEAN

public static final WrapperType BOOLEAN

BYTE

public static final WrapperType BYTE

SHORT

public static final WrapperType SHORT

CHAR

public static final WrapperType CHAR

INT

public static final WrapperType INT

LONG

public static final WrapperType LONG

FLOAT

public static final WrapperType FLOAT

DOUBLE

public static final WrapperType DOUBLE

OBJECT

public static final WrapperType OBJECT

VOID

public static final WrapperType VOID

Method Detail

values

public static WrapperType[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (WrapperType c : WrapperType.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static WrapperType valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

bitWidth

public int bitWidth()

How many bits are in the wrapped value? Returns 0 for OBJECT or VOID.

stackSlots

public int stackSlots()

How many JVM stack slots occupied by the wrapped value? Returns 0 for VOID.

isSingleWord

public boolean isSingleWord()

Does the wrapped value occupy a single JVM stack slot?

isDoubleWord

public boolean isDoubleWord()

Does the wrapped value occupy two JVM stack slots?

isNumeric

public boolean isNumeric()

Is the wrapped type numeric (not void or object)?

isIntegral

public boolean isIntegral()

Is the wrapped type a primitive other than float, double, or void?

isSubwordOrInt

public boolean isSubwordOrInt()

Is the wrapped type one of int, boolean, byte, char, or short?

isSigned

public boolean isSigned()

isUnsigned

public boolean isUnsigned()

isFloating

public boolean isFloating()

Is the wrapped type either float or double?

isOther

public boolean isOther()

Is the wrapped type either void or a reference?

isConvertibleFrom

public boolean isConvertibleFrom(WrapperType source)

Does the JLS 5.1.2 allow a variable of this wrapper's primitive type to be assigned from a value of the given wrapper's primitive type? Cases:

• unboxing followed by widening primitive conversion
• any type converted to void (i.e., dropping a method call's value)
• boxing conversion followed by widening reference conversion to Object

These are the cases allowed by MethodHandle.asType.

wrap

public Object wrap(Object x)

Wrap a value in this wrapper's type. Performs standard primitive conversions, including truncation and float conversions. Performs returns the unchanged reference for OBJECT. Returns null for VOID. Returns a zero value for a null input.

Throws:

ClassCastException - if this wrapper is numeric and the operand is not a number, character, boolean, or null

wrap

public Object wrap(int x)

Wrap a value (an int or smaller value) in this wrapper's type. Performs standard primitive conversions, including truncation and float conversions. Produces an Integer for OBJECT, although the exact type of the operand is not known. Returns null for VOID.