gw.lang.parser

Interface ICoercionManager

All Superinterfaces:

IService

All Known Implementing Classes:

StandardCoercionManager

public interface ICoercionManager
extends IService

Method Summary

Modifier and Type	Method and Description
boolean	canCoerce(IType lhsType, IType rhsType)
Object	convertNullAsPrimitive(IType intrType, boolean isForBoxing) Converts a null value to a value compatible with the specified primitive type.
Object	convertValue(Object value, IType intrType)
ICoercer	findCoercer(IType lhsType, IType rhsType, boolean runtime)
String	formatDate(Date value, String strFormat)
String	formatNumber(Double value, String strFormat)
String	formatTime(Date value, String strFormat)
boolean	isDateTime(String str)
boolean	isPrimitiveOrBoxed(IType type) Determine whether the specified type is either a primitive or a boxed primitive.
BigDecimal	makeBigDecimalFrom(Object obj)
BigInteger	makeBigIntegerFrom(Object obj)
Boolean	makeBooleanFrom(Object obj)
Date	makeDateFrom(Object obj) Returns a new Date instance representing the object.
Double	makeDoubleFrom(Object obj) Returns a Double for an arbitrary object.
Float	makeFloatFrom(Object obj)
Integer	makeIntegerFrom(Object obj)
Long	makeLongFrom(Object obj)
boolean	makePrimitiveBooleanFrom(Object obj)
double	makePrimitiveDoubleFrom(Object obj)
float	makePrimitiveFloatFrom(Object obj)
int	makePrimitiveIntegerFrom(Object obj)
long	makePrimitiveLongFrom(Object obj)
String	makeStringFrom(Object obj)
boolean	notCoercibleOrRequiresExplicitCoercion(IType lhsType, IType rhsType)
Date	parseDateTime(String str) Produce a date from a string using standard DateFormat parsing.
Number	parseNumber(String strValue)
ICoercer	resolveCoercerStatically(IType lhsType, IType rhsType) Determine and return a statically valid coercer from the rhsType to the lhsType.
IType	verifyTypesComparable(IType lhsType, IType rhsType, boolean bBiDirectional) Verifies that the right hand type can be converted or coerced to the left hand type.
IType	verifyTypesComparable(IType lhsType, IType rhsType, boolean bBiDirectional, IFullParserState parserState) Verifies that the right hand type can be converted or coerced to the left hand type.

Methods inherited from interface gw.config.IService

init, isInited, uninit

Method Detail

canCoerce

boolean canCoerce(IType lhsType,
                  IType rhsType)

Parameters:

lhsType - type to be coerced to

rhsType - type to be coerced from

Returns:

true if a coercion exists from rhsType to lhsType, false otherwise

convertValue

Object convertValue(Object value,
                    IType intrType)

Parameters:

intrType - type to coerce to

value - the value to coerce (may not be null)

Returns:

the converted value

notCoercibleOrRequiresExplicitCoercion

boolean notCoercibleOrRequiresExplicitCoercion(IType lhsType,
                                               IType rhsType)

verifyTypesComparable

IType verifyTypesComparable(IType lhsType,
                            IType rhsType,
                            boolean bBiDirectional)
                     throws ParseIssue

Verifies that the right hand type can be converted or coerced to the left hand type. If bBiDirectional is true, it will verify that either converts to another

Throws:

ParseIssue

verifyTypesComparable

IType verifyTypesComparable(IType lhsType,
                            IType rhsType,
                            boolean bBiDirectional,
                            IFullParserState parserState)
                     throws ParseIssue

Verifies that the right hand type can be converted or coerced to the left hand type. If bBiDirectional is true, it will verify that either converts to another. The parser state will be used to report parse errors with.

Throws:

ParseIssue

convertNullAsPrimitive

Object convertNullAsPrimitive(IType intrType,
                              boolean isForBoxing)

Converts a null value to a value compatible with the specified primitive type.

Parameters:

intrType - The primitive type to convert to.

Returns:

A wrapped primitive value corresponding to null.

findCoercer

ICoercer findCoercer(IType lhsType,
                     IType rhsType,
                     boolean runtime)

resolveCoercerStatically

ICoercer resolveCoercerStatically(IType lhsType,
                                  IType rhsType)

Determine and return a statically valid coercer from the rhsType to the lhsType. Returns null if no coercion is necessary.

Parameters:

lhsType - the type to coerce to

rhsType - the type to coerce from

isPrimitiveOrBoxed

boolean isPrimitiveOrBoxed(IType type)

Determine whether the specified type is either a primitive or a boxed primitive.

Parameters:

type - the type to examine

Returns:

true if the specified type is a primitive or a boxed primitive

makePrimitiveBooleanFrom

boolean makePrimitiveBooleanFrom(Object obj)

Returns:

A Boolean for an arbitrary object.

makeBooleanFrom

Boolean makeBooleanFrom(Object obj)

makePrimitiveIntegerFrom

int makePrimitiveIntegerFrom(Object obj)

makeIntegerFrom

Integer makeIntegerFrom(Object obj)

makePrimitiveLongFrom

long makePrimitiveLongFrom(Object obj)

makeLongFrom

Long makeLongFrom(Object obj)

makePrimitiveFloatFrom

float makePrimitiveFloatFrom(Object obj)

makeFloatFrom

Float makeFloatFrom(Object obj)

makePrimitiveDoubleFrom

double makePrimitiveDoubleFrom(Object obj)

makeDoubleFrom

Double makeDoubleFrom(Object obj)

Returns a Double for an arbitrary object. Uses a semi-intelligent algorithm to create an appropriate Double instance. If the Object argument is a:

 null value - an appropriate value respecting this parsed element's nullAsZero
   setting e.g., either null or an 'empty' value.
 Double - returns the argument as is.
 Number - the Number's doubleValue().
 String - Double.parseDouble( String )
 Boolean - a pooled instance of either Double( 0 ) or Double( 1 )
 Date - A Double for Date.getTime().
 default - A parsed Double for the Object argument's toString() method.
 

Returns:

A Double for an arbitrary object (may return a pooled instance).

makeBigDecimalFrom

BigDecimal makeBigDecimalFrom(Object obj)

makeBigIntegerFrom

BigInteger makeBigIntegerFrom(Object obj)

makeStringFrom

String makeStringFrom(Object obj)

makeDateFrom

Date makeDateFrom(Object obj)

Returns a new Date instance representing the object.

parseDateTime

Date parseDateTime(String str)
            throws ParseException

Produce a date from a string using standard DateFormat parsing.

Throws:

ParseException

isDateTime

boolean isDateTime(String str)
            throws ParseException

Throws:

ParseException

formatDate

String formatDate(Date value,
                  String strFormat)

formatTime

String formatTime(Date value,
                  String strFormat)

formatNumber

String formatNumber(Double value,
                    String strFormat)

parseNumber

Number parseNumber(String strValue)