Package gw.lang.parser.coercers

Class MetaTypeToClassCoercer

java.lang.Object

gw.lang.parser.coercers.BaseCoercer

gw.lang.parser.coercers.MetaTypeToClassCoercer

All Implemented Interfaces:

ICoercer, IResolvingCoercer

public class MetaTypeToClassCoercer
extends BaseCoercer
implements IResolvingCoercer

Field Summary

Fields inherited from interface gw.lang.parser.ICoercer

MAX_PRIORITY

Constructor Summary

Constructors

Constructor	Description
MetaTypeToClassCoercer()

Method Summary

Modifier and Type	Method	Description
Object	coerceValue(IType typeToCoerceTo, Object value)
int	getPriority(IType to, IType from)
boolean	handlesNull()
static MetaTypeToClassCoercer	instance()
boolean	isExplicitCoercion()
IType	resolveType(IType target, IType source)	This method should produce a more appropriately parameterized type for the given target type for this coercion.

Methods inherited from class java.lang.Object

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

Constructor Detail

MetaTypeToClassCoercer

public MetaTypeToClassCoercer()

Method Detail

coerceValue

public Object coerceValue(IType typeToCoerceTo,
                          Object value)

Specified by:

coerceValue in interface ICoercer

isExplicitCoercion

public boolean isExplicitCoercion()

Specified by:

isExplicitCoercion in interface ICoercer

handlesNull

public boolean handlesNull()

Specified by:

handlesNull in interface ICoercer

Returns:

true if this coercer knows how to handle the null value.

resolveType

public IType resolveType(IType target,
                         IType source)

Description copied from interface: IResolvingCoercer

This method should produce a more appropriately parameterized type for the given target type for this coercion. This allows a coercion to communicate type information through the coercion process. An example is the MetaType-to-Class coercion. MetaType should be interpreted as Class from a type inference perspective, so this give the coercer a chance to let the compiler know so.

If no more appropriate inference type exists, this method should return the source type.

Specified by:

resolveType in interface IResolvingCoercer

Parameters:

target - type

Returns:

a possibly more appropriately parameterized type or the source type if not

getPriority

public int getPriority(IType to,
                       IType from)

Specified by:

getPriority in interface ICoercer

Returns:

a value between 0 and MAX_PRIORITY, inclusive that indicates the priority of this coercer when resolving overloaded methods. Typically a coercer should return 0, but coercers that have a high affinity between the target and coerced type, such as primitives, can have higher priorities.

instance

public static MetaTypeToClassCoercer instance()