Type converter is part of Jodd responsible for converting value of one
type into another. For example, it may convert a
of a number into an
Each destination type has its own
TypeConverter. Type converter
'knows' how to convert any value to destination type, if possible. So,
BooleanConverter may convert strings "no",
"1", "true"… into correct boolean value.
There are many type converters available, for full list check javadoc. Besides common conversions (from/to string and numeric types) there are a lot more conversions. So you can convert into string arrays, class names to classes…
All type converters are registered with
TypeConverterManager. It is a
central place where all type converters are registered and from where
you can lookup for some that you need.
Convert utility class is one big class with many conversion methods
for common types, made for convenient and faster type conversion. With
Convert methods it is possible to perform the type conversion using
just a single line of code.
Lookup type converter
TypeConverter tc = TypeConverterManager.lookup(String.class); tc.convert(Integer.valueOf(123)
Using faster Convert class when target type is known
Integer i = Convert.toInteger("173");
Full conversion (preferred when can't do with
This is the most complete way how to convert types. Not only that this method lookups for the type converter, it also performs additional conversions, like recognizing arrays and enums.
Custom type converter
New type converters are easy to add: just implement the interface and register it in the manager. From that point, new custom type is available all over the Jodd frameworks.