org.apache.struts2.util
Class StrutsTypeConverter
java.lang.Object
com.opensymphony.xwork2.conversion.impl.DefaultTypeConverter
org.apache.struts2.util.StrutsTypeConverter
- All Implemented Interfaces:
- TypeConverter
public abstract class StrutsTypeConverter
- extends DefaultTypeConverter
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 coversion 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 XWorkException or
preferable a TypeConversionException.
Methods inherited from class com.opensymphony.xwork2.conversion.impl.DefaultTypeConverter |
bigDecValue, bigIntValue, booleanValue, convertValue, convertValue, doubleValue, enumValue, getLocale, getTypeConverter, longValue, stringValue, stringValue |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
StrutsTypeConverter
public StrutsTypeConverter()
convertValue
public Object convertValue(Map context,
Object o,
Class toClass)
- Overrides:
convertValue
in class DefaultTypeConverter
performFallbackConversion
protected Object performFallbackConversion(Map context,
Object o,
Class toClass)
- 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
- o
- toClass
-
- Returns:
- The fallback conversion
convertFromString
public abstract Object convertFromString(Map context,
String[] values,
Class toClass)
- 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
public abstract String convertToString(Map context,
Object o)
- Converts the specified object to a String.
- Parameters:
context
- the action contexto
- the object to be converted
- Returns:
- the converted String
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