Package gw.lang.parser.coercers
Class MetaTypeToClassCoercer
- java.lang.Object
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- gw.lang.parser.coercers.BaseCoercer
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- gw.lang.parser.coercers.MetaTypeToClassCoercer
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- All Implemented Interfaces:
ICoercer
,IResolvingCoercer
public class MetaTypeToClassCoercer extends BaseCoercer implements IResolvingCoercer
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Field Summary
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Fields inherited from interface gw.lang.parser.ICoercer
MAX_PRIORITY
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Constructor Summary
Constructors Constructor Description MetaTypeToClassCoercer()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods 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.
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Method Detail
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coerceValue
public Object coerceValue(IType typeToCoerceTo, Object value)
- Specified by:
coerceValue
in interfaceICoercer
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isExplicitCoercion
public boolean isExplicitCoercion()
- Specified by:
isExplicitCoercion
in interfaceICoercer
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handlesNull
public boolean handlesNull()
- Specified by:
handlesNull
in interfaceICoercer
- Returns:
- true if this coercer knows how to handle the null value.
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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 interfaceIResolvingCoercer
- Parameters:
target
- type- Returns:
- a possibly more appropriately parameterized type or the source type if not
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getPriority
public int getPriority(IType to, IType from)
- Specified by:
getPriority
in interfaceICoercer
- 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.
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instance
public static MetaTypeToClassCoercer instance()
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