Interface TypeConversionHandler
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- All Known Implementing Classes:
TypeConversionHandlerImpl
public interface TypeConversionHandler
A conversion handler adds admissible conversions between Java types whenever Velocity introspection has to map VTL methods and property accessors to Java methods. Both methods must be consistent:getNeededConverter
must not returnnull
wheneverisExplicitlyConvertible
returned true with the same arguments.- Since:
- 2.1
- Version:
- $Id: ConversionHandler.java $
- Author:
- Claude Brisson
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description void
addConverter(Type formal, Class<?> actual, Converter<?> converter)
Add the given converter to the handler.Converter<?>
getNeededConverter(Type formal, Class<?> actual)
Returns the appropriate Converter object needed for an explicit conversion Returns null if no conversion is needed.boolean
isExplicitlyConvertible(Type formal, Class<?> actual, boolean possibleVarArg)
Check to see if the conversion can be done using an explicit conversion
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Method Detail
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isExplicitlyConvertible
boolean isExplicitlyConvertible(Type formal, Class<?> actual, boolean possibleVarArg)
Check to see if the conversion can be done using an explicit conversion- Parameters:
formal
- expected formal typeactual
- provided argument typepossibleVarArg
- whether var arg is possible- Returns:
- null if no conversion is needed, or the appropriate Converter object
- Since:
- 2.1
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getNeededConverter
Converter<?> getNeededConverter(Type formal, Class<?> actual)
Returns the appropriate Converter object needed for an explicit conversion Returns null if no conversion is needed.- Parameters:
formal
- expected formal typeactual
- provided argument type- Returns:
- null if no conversion is needed, or the appropriate Converter object
- Since:
- 2.1
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