gnu.bytecode

Class PrimType

Known Direct Subclasses:
LangPrimType

public class PrimType
extends Type

Field Summary

Fields inherited from class gnu.bytecode.Type

booleanValue_method, boolean_ctype, boolean_type, byte_type, char_type, clone_method, doubleValue_method, double_type, floatValue_method, float_type, intValue_method, int_type, java_lang_Class_type, longValue_method, long_type, neverReturnsType, nullType, number_type, pointer_type, reflectClass, short_type, string_type, throwable_type, toString_method, tostring_type, typeArray0, void_type

Constructor Summary

PrimType(String nam, String sig, int siz, Class reflectClass)
PrimType(PrimType type)

Method Summary

static boolean
booleanValue(Object value)
Coerce value to a boolean.
char
charValue(Object value)
Coerce value to a char.
Object
coerceFromObject(Object obj)
Convert an object to a value of this Type.
static int
compare(PrimType type1, PrimType type2)
int
compare(Type other)
Return a numeric code showing "subtype" relationship: 1: if other is a pure subtype of this; 0: if has the same values; -1: if this is a pure subtype of other; -2: if they have values in common but neither is a subtype of the other; -3: if the types have no values in common.
void
emitCoerceFromObject(CodeAttr code)
Compile code to coerce/convert from Object to this type.
void
emitCoerceToObject(CodeAttr code)
Compile code to convert a object of this type on the stack to Object.
void
emitIsInstance(CodeAttr code)

Methods inherited from class gnu.bytecode.Type

coerceFromObject, coerceToObject, compare, emitCoerceFromObject, emitCoerceToObject, emitIsInstance, getImplementationType, getName, getReflectClass, getSignature, getSize, getSizeInWords, getType, hashCode, isInstance, isMoreSpecific, isSubtype, isValidJavaTypeName, isVoid, lookupType, lowestCommonSuperType, make, promote, registerTypeForClass, setName, setReflectClass, setSignature, signatureLength, signatureLength, signatureToName, signatureToPrimitive, signatureToType, signatureToType, swappedCompareResult, toString

Constructor Details

PrimType

public PrimType(String nam,
                String sig,
                int siz,
                Class reflectClass)

PrimType

protected PrimType(PrimType type)

Method Details

booleanValue

public static boolean booleanValue(Object value)
Coerce value to a boolean. Only defined if getSignature() is "Z".

charValue

public char charValue(Object value)
Coerce value to a char. Only defined if getSignature() is "C".

coerceFromObject

public Object coerceFromObject(Object obj)
Convert an object to a value of this Type. Throw a ClassCastException when this is not possible.
Overrides:
coerceFromObject in interface Type

compare

public static int compare(PrimType type1,
                          PrimType type2)

compare

public int compare(Type other)
Return a numeric code showing "subtype" relationship: 1: if other is a pure subtype of this; 0: if has the same values; -1: if this is a pure subtype of other; -2: if they have values in common but neither is a subtype of the other; -3: if the types have no values in common. "Same member" is rather loose; by "A is a subtype of B" we mean that all instance of A can be "widened" to B. More formally, A.compare(B) returns: 1: all B values can be converted to A without a coercion failure (i.e. a ClassCastException or overflow or major loss of information), but not vice versa. 0: all A values can be converted to B without a coercion failure and vice versa; -1: all A values can be converted to B without a coercion failure not not vice versa; -2: there are (potentially) some A values that can be converted to B, and some B values can be converted to A; -3: there are no A values that can be converted to B, and neither are there any B values that can be converted to A.
Overrides:
compare in interface Type

emitCoerceFromObject

public void emitCoerceFromObject(CodeAttr code)
Compile code to coerce/convert from Object to this type.
Overrides:
emitCoerceFromObject in interface Type

emitCoerceToObject

public void emitCoerceToObject(CodeAttr code)
Compile code to convert a object of this type on the stack to Object.
Overrides:
emitCoerceToObject in interface Type

emitIsInstance

public void emitIsInstance(CodeAttr code)
Overrides:
emitIsInstance in interface Type