TranslatorSource (Tapestry API - 5.7.2)乐学网一站式学习平台

All Known Implementing Classes:

TranslatorSourceImpl
```
@UsesMappedConfiguration(key=java.lang.Class.class,
                         value=Translator.class)
public interface TranslatorSource
```
A source for Translators, either by name or by property type. The source knows about two sets of translators: the standard translators contributed directly to the service and the alternate translators, contributed to the TranslatorAlternatesSource service. Each contributed translator must have a unique name. Generally, Translators are matched by type (i.e., the type matching a particular property that will be read or updated). Contributions to this service use a StrategyRegistry to match by type. Translators can also be selected by name. The TranslatorAlternatesSource service configuration is often used for this purpose. The contribution key must match the translator type.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Translator`	`findByType(Class valueType)`	Finds a `Translator` that is appropriate to the given type, which is usually obtained via `Binding.getBindingType()`.
`Translator`	`get(String name)`	Returns the translator with the given name (either a standard translator, or an alternate).
`Translator`	`getByType(Class valueType)`	Finds a `Translator` that is appropriate to the given type, which is usually obtained via `Binding.getBindingType()`.

- Method Detail
  - get
```
Translator get(String name)
```
    Returns the translator with the given name (either a standard translator, or an alternate).
    
    Parameters:
    
    name - name of translator (as configured, but case is ignored)
    
    Returns:
    
    the shared translator instance
    
    Throws:
    
    RuntimeException - if no translator is configured for the provided name
  - findByType
```
Translator findByType(Class valueType)
```
    Finds a Translator that is appropriate to the given type, which is usually obtained via Binding.getBindingType(). Performs an inheritance-based search for the best match, among the standard translator (not alternates).
    
    Parameters:
    
    valueType - the type of value for which a default translator is needed
    
    Returns:
    
    the matching translator, or null if no match can be found
  - getByType
```
Translator getByType(Class valueType)
```
    Finds a Translator that is appropriate to the given type, which is usually obtained via Binding.getBindingType(). Performs an inheritance-based search for the best match, among the standard translators (not alternates).
    
    Parameters:
    
    valueType - the type of value for which a default translator is needed
    
    Returns:
    
    the matching translator
    
    Throws:
    
    IllegalArgumentException - if no standard validator matches the provided type