Class StrutsTypeConverter
- All Implemented Interfaces:
TypeConverter
Base class for type converters used in Struts. This class provides two abstract methods that are used to convert both to and from strings -- the critical functionality that is core to Struts's type conversion system.
Type converters do not have to use this class. It is merely a helper base class, although it is recommended that you use this class as it provides the common type conversion contract required for all web-based type conversion.
There's a hook (fall back method) called performFallbackConversion
of which
could be used to perform some fallback conversion if convertValue
method of this
failed. By default it just ask its super class (Ognl's DefaultTypeConverter) to do the conversion.
To allow the framework to recognize that a conversion error has occurred, throw an StrutsException or preferable a TypeConversionException.
-
Field Summary
Fields inherited from class org.apache.struts2.conversion.impl.DefaultTypeConverter
MILLISECOND_FORMAT
Fields inherited from interface org.apache.struts2.conversion.TypeConverter
NO_CONVERSION_POSSIBLE
-
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionabstract Object
convertFromString
(Map context, String[] values, Class toClass) Converts one or more String values to the specified class.abstract String
convertToString
(Map context, Object o) Converts the specified object to a String.convertValue
(Map context, Object o, Class toClass) protected Object
performFallbackConversion
(Map context, Object o, Class toClass) Hook to perform a fallback conversion if every default options failed.Methods inherited from class org.apache.struts2.conversion.impl.DefaultTypeConverter
bigDecValue, bigIntValue, booleanValue, convertValue, convertValue, doubleValue, enumValue, getLocale, getTypeConverter, longValue, setContainer, stringValue, stringValue
-
Constructor Details
-
StrutsTypeConverter
public StrutsTypeConverter()
-
-
Method Details
-
convertValue
- Overrides:
convertValue
in classDefaultTypeConverter
-
performFallbackConversion
Hook to perform a fallback conversion if every default options failed. By default this will ask Ognl's DefaultTypeConverter (of which this class extends) to perform the conversion.- Parameters:
context
- the action contexto
- object to be convertedtoClass
- the class to convert to- Returns:
- The fallback conversion
-
convertFromString
Converts one or more String values to the specified class.- Parameters:
context
- the action contextvalues
- the String values to be converted, such as those submitted from an HTML formtoClass
- the class to convert to- Returns:
- the converted object
-
convertToString
Converts the specified object to a String.- Parameters:
context
- the action contexto
- the object to be converted- Returns:
- the converted String
-