org.springframework.beans
Interface TypeConverter

All Known Subinterfaces:
BeanWrapper, ConfigurablePropertyAccessor
All Known Implementing Classes:
AbstractPropertyAccessor, BeanWrapperImpl, DataBinder, DirectFieldAccessor, PortletRequestDataBinder, ServletRequestDataBinder, SimpleTypeConverter, WebDataBinder, WebRequestDataBinder

public interface TypeConverter

Interface that defines type conversion methods. Typically (but not necessarily) implemented in conjunction with the PropertyEditorRegistry interface.

Since:
2.0
Author:
Juergen Hoeller
See Also:
PropertyEditorRegistry, SimpleTypeConverter, BeanWrapperImpl

Method Summary
 java.lang.Object convertIfNecessary(java.lang.Object value, java.lang.Class requiredType)
          Convert the value to the required type (if necessary from a String).
 java.lang.Object convertIfNecessary(java.lang.Object value, java.lang.Class requiredType, MethodParameter methodParam)
          Convert the value to the required type (if necessary from a String).
 

Method Detail

convertIfNecessary

java.lang.Object convertIfNecessary(java.lang.Object value,
                                    java.lang.Class requiredType)
                                    throws TypeMismatchException
Convert the value to the required type (if necessary from a String).

Conversions from String to any type will typically use the setAsText method of the PropertyEditor class. Note that a PropertyEditor must be registered for the given class for this to work; this is a standard JavaBeans API. A number of PropertyEditors are automatically registered.

Parameters:
value - the value to convert
requiredType - the type we must convert to (or null if not known, for example in case of a collection element)
Returns:
the new value, possibly the result of type conversion
Throws:
TypeMismatchException - if type conversion failed
See Also:
PropertyEditor.setAsText(String), PropertyEditor.getValue()

convertIfNecessary

java.lang.Object convertIfNecessary(java.lang.Object value,
                                    java.lang.Class requiredType,
                                    MethodParameter methodParam)
                                    throws TypeMismatchException
Convert the value to the required type (if necessary from a String).

Conversions from String to any type will typically use the setAsText method of the PropertyEditor class. Note that a PropertyEditor must be registered for the given class for this to work; this is a standard JavaBeans API. A number of PropertyEditors are automatically registered.

Parameters:
value - the value to convert
requiredType - the type we must convert to (or null if not known, for example in case of a collection element)
methodParam - the method parameter that is the target of the conversion (for analysis of generic types; may be null)
Returns:
the new value, possibly the result of type conversion
Throws:
TypeMismatchException - if type conversion failed
See Also:
PropertyEditor.setAsText(String), PropertyEditor.getValue()