Package bsh
Class Primitive
- java.lang.Object
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- bsh.Primitive
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- All Implemented Interfaces:
ParserConstants
,Serializable
public final class Primitive extends Object implements ParserConstants, 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
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Field Summary
Fields Modifier and Type Field Description static Primitive
NULL
static Primitive
VOID
VOID means "no type".-
Fields inherited from interface bsh.ParserConstants
_DEFAULT, ABSTRACT, 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, ENUM, EOF, EQ, EXPONENT, EXTENDS, FALSE, FINAL, FINALLY, FLOAT, FLOATING_POINT_LITERAL, FOR, FORMAL_COMMENT, GE, GEX, GOTO, GT, GTX, HASH_BANG_COMMENT, HEX_LITERAL, HOOK, IDENTIFIER, IF, IMPLEMENTS, 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, NATIVE, NE, NEW, NONPRINTABLE, OCTAL_LITERAL, ORASSIGN, ORASSIGNX, PACKAGE, 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, STRICTFP, STRING_LITERAL, SWITCH, SYNCHRONIZED, THROW, THROWS, TILDE, tokenImage, TRANSIENT, TRUE, TRY, VOLATILE, WHILE, XOR, XORASSIGN
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static Object
binaryOperation(Object obj1, Object obj2, int kind)
Perform a binary operation on two Primitives or wrapper types.boolean
booleanValue()
static Class
boxType(Class primitiveType)
Get the corresponding java.lang wrapper class for the primitive TYPE class.Primitive
castToType(Class toType, int operation)
Cast this bsh.Primitive value to a new bsh.Primitive value This is usually a numeric type cast.boolean
equals(Object obj)
Primitives compare equal with other Primitives containing an equal wrapped value.static Primitive
getDefaultValue(Class type)
Get the appropriate default value per JLS 4.5.4Class
getType()
Get the corresponding Java primitive TYPE class for this Primitive.Object
getValue()
Return the primitive value stored in its java.lang wrapper classint
hashCode()
The hash of the Primitive is tied to the hash of the wrapped value but shifted so that they are not the same.int
intValue()
boolean
isNumber()
Determine if this primitive is a numeric type.static boolean
isWrapperType(Class type)
Number
numberValue()
String
toString()
static Primitive
unaryOperation(Primitive val, int kind)
static Class
unboxType(Class wrapperType)
Get the corresponding primitive TYPE class for the java.lang wrapper class type.static Object
unwrap(Object obj)
Unwrap primitive values and map voids to nulls.static Object[]
unwrap(Object[] args)
static Object[]
wrap(Object[] args, Class[] paramTypes)
static Object
wrap(Object value, Class type)
Wrap primitive values (as indicated by type param) and nulls in the Primitive class.
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Constructor Detail
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Primitive
public Primitive(Object value)
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Primitive
public Primitive(boolean value)
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Primitive
public Primitive(byte value)
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Primitive
public Primitive(short value)
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Primitive
public Primitive(char value)
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Primitive
public Primitive(int value)
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Primitive
public Primitive(long value)
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Primitive
public Primitive(float value)
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Primitive
public Primitive(double value)
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Method Detail
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getValue
public Object getValue()
Return the primitive value stored in its java.lang wrapper class
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getType
public Class getType()
Get the corresponding Java primitive TYPE class for this Primitive.- Returns:
- the primitive TYPE class type of the value or Void.TYPE for Primitive.VOID or null value for type of Primitive.NULL
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binaryOperation
public static Object binaryOperation(Object obj1, Object obj2, int kind) throws UtilEvalError
Perform a binary operation on two Primitives or wrapper types. If both original args were Primitives return a Primitive result else it was mixed (wrapper/primitive) return the wrapper type. The exception is for boolean operations where we will return the primitive type either way.- Throws:
UtilEvalError
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unaryOperation
public static Primitive unaryOperation(Primitive val, int kind) throws UtilEvalError
- Throws:
UtilEvalError
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intValue
public int intValue() throws UtilEvalError
- Throws:
UtilEvalError
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booleanValue
public boolean booleanValue() throws UtilEvalError
- Throws:
UtilEvalError
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isNumber
public boolean isNumber()
Determine if this primitive is a numeric type. i.e. not boolean, null, or void (but including char)
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numberValue
public Number numberValue() throws UtilEvalError
- Throws:
UtilEvalError
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equals
public boolean equals(Object obj)
Primitives compare equal with other Primitives containing an equal wrapped value.
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hashCode
public int hashCode()
The hash of the Primitive is tied to the hash of the wrapped value but shifted so that they are not the same.
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unwrap
public static Object unwrap(Object obj)
Unwrap primitive values and map voids to nulls. 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.
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wrap
public static Object wrap(Object value, Class type)
Wrap primitive values (as indicated by type param) and nulls in the Primitive class. Values not primitive or null are left unchanged. Primitive values are represented by their wrapped values in param value. The value null is mapped to Primitive.NULL. Any value specified with type Void.TYPE is mapped to Primitive.VOID.
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getDefaultValue
public static Primitive getDefaultValue(Class type)
Get the appropriate default value per JLS 4.5.4
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boxType
public static Class boxType(Class primitiveType)
Get the corresponding java.lang wrapper class for the primitive TYPE class. e.g. Integer.TYPE -> Integer.class
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unboxType
public static Class unboxType(Class wrapperType)
Get the corresponding primitive TYPE class for the java.lang wrapper class type. e.g. Integer.class -> Integer.TYPE
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castToType
public Primitive castToType(Class toType, int operation) throws UtilEvalError
Cast this bsh.Primitive value to a new bsh.Primitive value This is usually a numeric type cast. Other cases include: A boolean can be cast to boolen null can be cast to any object type and remains null Attempting to cast a void causes an exception- Parameters:
toType
- is the java object or primitive TYPE class- Throws:
UtilEvalError
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isWrapperType
public static boolean isWrapperType(Class type)
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