bsh
Class Primitive

java.lang.Object
  |
  +--bsh.Primitive

All Implemented Interfaces:

ParserConstants, java.io.Serializable

public class Primitive

extends java.lang.Object

implements ParserConstants, java.io.Serializable

Wrapper for primitive types in Bsh. This is package public because it is used in the implementation of some bsh commands. See the note in LHS.java about wrapping objects.

See Also:

Serialized Form

Nested Class Summary

private static class

Primitive.Special

Field Summary

static Primitive	NULL
private java.lang.Object	value
static Primitive	VOID VOID means "no type".

Fields inherited from interface bsh.ParserConstants

_DEFAULT, ANDASSIGN, ANDASSIGNX, ASSIGN, BANG, BIT_AND, BIT_ANDX, BIT_OR, BIT_ORX, BOOL_AND, BOOL_ANDX, BOOL_OR, BOOL_ORX, BOOLEAN, BREAK, BYTE, CASE, CATCH, CHAR, CHARACTER_LITERAL, CLASS, COLON, COMMA, CONST, CONTINUE, DECIMAL_LITERAL, DECR, DEFAULT, DIGIT, DO, DOT, DOUBLE, ELSE, EOF, EQ, EXPONENT, FALSE, FINAL, FINALLY, FLOAT, FLOATING_POINT_LITERAL, FOR, FORMAL_COMMENT, GE, GEX, GOTO, GT, GTX, HASH_BANG_COMMENT, HEX_LITERAL, HOOK, IDENTIFIER, IF, IMPORT, INCR, INSTANCEOF, INT, INTEGER_LITERAL, INTERFACE, LBRACE, LBRACKET, LE, LETTER, LEX, LONG, LPAREN, LSHIFT, LSHIFTASSIGN, LSHIFTASSIGNX, LSHIFTX, LT, LTX, MINUS, MINUSASSIGN, MOD, MODASSIGN, MULTI_LINE_COMMENT, NE, NEW, NONPRINTABLE, OCTAL_LITERAL, ORASSIGN, ORASSIGNX, PLUS, PLUSASSIGN, PRIVATE, PROTECTED, PUBLIC, RBRACE, RBRACKET, RETURN, RPAREN, RSIGNEDSHIFT, RSIGNEDSHIFTASSIGN, RSIGNEDSHIFTASSIGNX, RSIGNEDSHIFTX, RUNSIGNEDSHIFT, RUNSIGNEDSHIFTASSIGN, RUNSIGNEDSHIFTASSIGNX, RUNSIGNEDSHIFTX, SEMICOLON, SHORT, SINGLE_LINE_COMMENT, SLASH, SLASHASSIGN, STAR, STARASSIGN, STATIC, STRING_LITERAL, SWITCH, THROW, TILDE, tokenImage, TRUE, TRY, WHILE, XOR, XORASSIGN

Constructor Summary

	Primitive(boolean value)
	Primitive(java.lang.Boolean value)
	Primitive(byte value)
	Primitive(java.lang.Byte value)
	Primitive(char value)
	Primitive(java.lang.Character value)
	Primitive(double value)
	Primitive(java.lang.Double value)
	Primitive(float value)
	Primitive(java.lang.Float value)
	Primitive(int value)
	Primitive(java.lang.Integer value)
	Primitive(long value)
	Primitive(java.lang.Long value)
	Primitive(java.lang.Number number)
private	Primitive(java.lang.Object value)
	Primitive(short value)
	Primitive(java.lang.Short value)

Method Summary

static java.lang.Object	binaryOperation(java.lang.Object obj1, java.lang.Object obj2, int kind) Allow primitive operations on wrapper types such as Integer and Boolean.
(package private) static java.lang.Object	binaryOperationImpl(java.lang.Object lhs, java.lang.Object rhs, int kind)
(package private) static java.lang.Boolean	booleanBinaryOperation(java.lang.Boolean B1, java.lang.Boolean B2, int kind)
(package private) static boolean	booleanUnaryOperation(java.lang.Boolean B, int kind)
boolean	booleanValue()
(package private) static java.lang.Object	doubleBinaryOperation(java.lang.Double D1, java.lang.Double D2, int kind)
(package private) static double	doubleUnaryOperation(java.lang.Double D, int kind)
boolean	equals(java.lang.Object obj)
(package private) static java.lang.Object	floatBinaryOperation(java.lang.Float F1, java.lang.Float F2, int kind)
(package private) static float	floatUnaryOperation(java.lang.Float F, int kind)
java.lang.Class	getType()
private java.lang.Class	getType(java.lang.Object o)
java.lang.Object	getValue()
(package private) static java.lang.Object	intBinaryOperation(java.lang.Integer I1, java.lang.Integer I2, int kind)
(package private) static int	intUnaryOperation(java.lang.Integer I, int kind)
int	intValue()
boolean	isNumber() Determine if this primitive is a numeric type.
(package private) static java.lang.Object	longBinaryOperation(java.lang.Long L1, java.lang.Long L2, int kind)
(package private) static long	longUnaryOperation(java.lang.Long L, int kind)
java.lang.Number	numberValue()
(package private) static java.lang.Object[]	promotePrimitives(java.lang.Object lhs, java.lang.Object rhs) Promote the pair of primitives to the maximum type of the two.
(package private) static java.lang.Object	promoteToInteger(java.lang.Object primitive) Promote primitive wrapper type to to Integer wrapper type Can we use the castPrimitive() (in BSHCastExpression) for this?
java.lang.String	toString()
static Primitive	unaryOperation(Primitive val, int kind)
static java.lang.Object	unwrap(java.lang.Object obj) Unwrap primitive values and map voids to nulls.

Methods inherited from class java.lang.Object

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

Field Detail

value

private java.lang.Object value

NULL

public static final Primitive NULL

VOID

public static final Primitive VOID

VOID means "no type". Strictly speaking, this makes no sense here. But for practical reasons we'll consider the lack of a type to be a special value.

Constructor Detail

Primitive

private Primitive(java.lang.Object value)

Primitive

public Primitive(java.lang.Number number)

Primitive

public Primitive(java.lang.Boolean value)

Primitive

public Primitive(java.lang.Byte value)

Primitive

public Primitive(java.lang.Short value)

Primitive

public Primitive(java.lang.Character value)

Primitive

public Primitive(java.lang.Integer value)

Primitive

public Primitive(java.lang.Long value)

Primitive

public Primitive(java.lang.Float value)

Primitive

public Primitive(java.lang.Double value)

Primitive

public Primitive(boolean value)

Primitive

public Primitive(byte value)

Primitive

public Primitive(short value)

Primitive

public Primitive(char value)

Primitive

public Primitive(int value)

Primitive

public Primitive(long value)

Primitive

public Primitive(float value)

Primitive

public Primitive(double value)

Method Detail

getValue

public java.lang.Object getValue()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getType

public java.lang.Class getType()

getType

private java.lang.Class getType(java.lang.Object o)

binaryOperation

public static java.lang.Object binaryOperation(java.lang.Object obj1,
                                               java.lang.Object obj2,
                                               int kind)
                                        throws EvalError

Allow primitive operations on wrapper types such as Integer and Boolean. This is static so that it can be reached from wherever...

EvalError

binaryOperationImpl

static java.lang.Object binaryOperationImpl(java.lang.Object lhs,
                                            java.lang.Object rhs,
                                            int kind)
                                     throws EvalError

EvalError

booleanBinaryOperation

static java.lang.Boolean booleanBinaryOperation(java.lang.Boolean B1,
                                                java.lang.Boolean B2,
                                                int kind)
                                         throws EvalError

EvalError

longBinaryOperation

static java.lang.Object longBinaryOperation(java.lang.Long L1,
                                            java.lang.Long L2,
                                            int kind)

intBinaryOperation

static java.lang.Object intBinaryOperation(java.lang.Integer I1,
                                           java.lang.Integer I2,
                                           int kind)

doubleBinaryOperation

static java.lang.Object doubleBinaryOperation(java.lang.Double D1,
                                              java.lang.Double D2,
                                              int kind)
                                       throws EvalError

EvalError

floatBinaryOperation

static java.lang.Object floatBinaryOperation(java.lang.Float F1,
                                             java.lang.Float F2,
                                             int kind)
                                      throws EvalError

EvalError

promoteToInteger

static java.lang.Object promoteToInteger(java.lang.Object primitive)

Promote primitive wrapper type to to Integer wrapper type Can we use the castPrimitive() (in BSHCastExpression) for this?

promotePrimitives

static java.lang.Object[] promotePrimitives(java.lang.Object lhs,
                                            java.lang.Object rhs)

Promote the pair of primitives to the maximum type of the two. e.g. [int,long]->[long,long]

unaryOperation

public static Primitive unaryOperation(Primitive val,
                                       int kind)
                                throws EvalError

EvalError

booleanUnaryOperation

static boolean booleanUnaryOperation(java.lang.Boolean B,
                                     int kind)
                              throws EvalError

EvalError

intUnaryOperation

static int intUnaryOperation(java.lang.Integer I,
                             int kind)

longUnaryOperation

static long longUnaryOperation(java.lang.Long L,
                               int kind)

floatUnaryOperation

static float floatUnaryOperation(java.lang.Float F,
                                 int kind)

doubleUnaryOperation

static double doubleUnaryOperation(java.lang.Double D,
                                   int kind)

intValue

public int intValue()
             throws EvalError

EvalError

booleanValue

public boolean booleanValue()
                     throws EvalError

EvalError

isNumber

public boolean isNumber()

Determine if this primitive is a numeric type. i.e. not boolean, null, or void (but including char)

numberValue

public java.lang.Number numberValue()
                             throws EvalError

EvalError

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

unwrap

public static java.lang.Object unwrap(java.lang.Object obj)

Unwrap primitive values and map voids to nulls. Normal (non Primitive) types remain unchanged.

Parameters:

obj - object type which may be bsh.Primitive

Returns:

corresponding "normal" Java type, "unwrapping" any bsh.Primitive types to their wrapper types.