org.apache.xalan.xsltc.compiler.util

Class Type

public abstract class Type extends Object implements Constants

Author: Jacek Ambroziak Santiago Pericas-Geertsen Morten Jorgensen

Field Summary
static Type	Attribute
static Type	Boolean
static Type	Comment
static Type	Element
static Type	Int
static Type	Node
static Type	NodeSet
static Type	Object
static Type	Processing_Instruction
static Type	Real
static Type	Reference
static Type	ResultTree
static Type	Root
static Type	String
static Type	Text
static Type	Void

Method Summary
Instruction	ADD()
Instruction	CMP(boolean less)
int	distanceTo(Type type) Returns the distance between two types.
Instruction	DIV()
Instruction	DUP()
String	getClassName() Returns the class name of an internal type's external representation.
BranchInstruction	GE(boolean tozero)
BranchInstruction	GT(boolean tozero)
abstract boolean	identicalTo(Type other) Returns true if this and other are identical types.
boolean	implementedAsMethod() Returns true if this type has no object representaion.
boolean	isNumber() Returns true if this type is a numeric type.
boolean	isSimple() Returns true if this type is a simple type.
BranchInstruction	LE(boolean tozero)
Instruction	LOAD(int slot)
BranchInstruction	LT(boolean tozero)
Instruction	MUL()
static Type	newObjectType(String javaClassName) Factory method to instantiate object types.
static Type	newObjectType(Class clazz) Factory method to instantiate object types.
Instruction	NEG()
Instruction	POP()
Instruction	REM()
Instruction	STORE(int slot)
Instruction	SUB()
abstract Type	toJCType()
abstract String	toSignature() Returns the signature of an internal type's external representation.
abstract String	toString() Returns a string representation of this type.
void	translateBox(ClassGenerator classGen, MethodGenerator methodGen) Translates an object of this type to its boxed representation.
void	translateFrom(ClassGenerator classGen, MethodGenerator methodGen, Class clazz) Translates an external (Java) type denoted by `clazz` to an object of this type.
void	translateTo(ClassGenerator classGen, MethodGenerator methodGen, Type type) Translates an object of this type to an object of type `type`.
void	translateTo(ClassGenerator classGen, MethodGenerator methodGen, Class clazz) Translates an object of this type to the external (Java) type denoted by `clazz`.
FlowList	translateToDesynthesized(ClassGenerator classGen, MethodGenerator methodGen, Type type) Translates object of this type to an object of type `type`.
FlowList	translateToDesynthesized(ClassGenerator classGen, MethodGenerator methodGen, BooleanType type) Translates an object of this type to an non-synthesized boolean.
void	translateUnBox(ClassGenerator classGen, MethodGenerator methodGen) Translates an object of this type to its unboxed representation.

Field Detail

Processing_Instruction

public static final Type Processing_Instruction

Method Detail

distanceTo

public int distanceTo(Type type)

Returns the distance between two types. This measure is used to select overloaded functions/operators. This method is typically redefined by the subclasses.

getClassName

public String getClassName()

Returns the class name of an internal type's external representation.

GE

public BranchInstruction GE(boolean tozero)

GT

public BranchInstruction GT(boolean tozero)

identicalTo

public abstract boolean identicalTo(Type other)

Returns true if this and other are identical types.

implementedAsMethod

public boolean implementedAsMethod()

Returns true if this type has no object representaion. Redefined in ResultTreeType.

isNumber

public boolean isNumber()

Returns true if this type is a numeric type. Redefined in NumberType.

isSimple

public boolean isSimple()

Returns true if this type is a simple type. Redefined in NumberType, BooleanType and StringType.

LE

public BranchInstruction LE(boolean tozero)

LT

public BranchInstruction LT(boolean tozero)

newObjectType

public static Type newObjectType(String javaClassName)

Factory method to instantiate object types. Returns a pre-defined instance for "java.lang.Object" and "java.lang.String".

newObjectType

public static Type newObjectType(Class clazz)

Factory method to instantiate object types. Returns a pre-defined instance for java.lang.Object.class and java.lang.String.class.

toSignature

public abstract String toSignature()

Returns the signature of an internal type's external representation.

toString

public abstract String toString()

Returns a string representation of this type.

translateBox

public void translateBox(ClassGenerator classGen, MethodGenerator methodGen)

Translates an object of this type to its boxed representation.

translateFrom

public void translateFrom(ClassGenerator classGen, MethodGenerator methodGen, Class clazz)

Translates an external (Java) type denoted by clazz to an object of this type. This method is used to translate return values when external functions are called.

translateTo

public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, Type type)

Translates an object of this type to an object of type type. Expects an object of the former type and pushes an object of the latter.

translateTo

public void translateTo(ClassGenerator classGen, MethodGenerator methodGen, Class clazz)

Translates an object of this type to the external (Java) type denoted by clazz. This method is used to translate parameters when external functions are called.

translateToDesynthesized

public FlowList translateToDesynthesized(ClassGenerator classGen, MethodGenerator methodGen, Type type)

Translates object of this type to an object of type type. Expects an object of the former type and pushes an object of the latter if not boolean. If type type is boolean then a branchhandle list (to be appended to the false list) is returned.

translateToDesynthesized

public FlowList translateToDesynthesized(ClassGenerator classGen, MethodGenerator methodGen, BooleanType type)

Translates an object of this type to an non-synthesized boolean. It does not push a 0 or a 1 but instead returns branchhandle list to be appended to the false list.

translateUnBox

public void translateUnBox(ClassGenerator classGen, MethodGenerator methodGen)

Translates an object of this type to its unboxed representation.