Package org.apache.velocity.util.introspection

Class TypeConversionHandlerImpl

java.lang.Object

org.apache.velocity.util.introspection.TypeConversionHandlerImpl

All Implemented Interfaces:

TypeConversionHandler

public class TypeConversionHandlerImpl
extends Object
implements TypeConversionHandler

A conversion handler adds admissible conversions between Java types whenever Velocity introspection has to map VTL methods and property accessors to Java methods. This implementation is the default Conversion Handler for Velocity.

Since:

2.0

Version:

$Id: TypeConversionHandlerImpl.java $

Author:

Claude Brisson

Constructor Summary

Constructors

Constructor	Description
TypeConversionHandlerImpl()	Constructor

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

TypeConversionHandlerImpl

public TypeConversionHandlerImpl()

Constructor

Method Detail

isExplicitlyConvertible

public boolean isExplicitlyConvertible(Type formal,
                                       Class<?> actual,
                                       boolean possibleVarArg)

Check to see if the conversion can be done using an explicit conversion

Specified by:

isExplicitlyConvertible in interface TypeConversionHandler

Parameters:

actual - found argument type

formal - expected formal type

possibleVarArg - whether var arg is possible

Returns:

true if actual class can be explicitely converted to expected formal type

Since:

2.1

getNeededConverter

public Converter<?> getNeededConverter(Type formal,
                                       Class<?> actual)

Returns the appropriate Converter object needed for an explicit conversion Returns null if no conversion is needed.

Specified by:

getNeededConverter in interface TypeConversionHandler

Parameters:

actual - found argument type

formal - expected formal type

Returns:

null if no conversion is needed, or the appropriate Converter object

Since:

2.1

addConverter

public void addConverter(Type formal,
                         Class<?> actual,
                         Converter<?> converter)

Add the given converter to the handler.

Specified by:

addConverter in interface TypeConversionHandler

Parameters:

formal - expected formal type

actual - provided argument type

converter - converter

Since:

2.1