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package javax.ws.rs.ext;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
/**
* Contract for a provider of {@link ParamConverter} instances.
*
* Providers implementing {@code ParamConverterProvider} contract must be either programmatically
* registered in a JAX-RS runtime or must be annotated with
* {@link javax.ws.rs.ext.Provider @Provider} annotation to be automatically discovered
* by the JAX-RS runtime during a provider scanning phase.
*
*
* @author Marek Potociar
*/
public interface ParamConverterProvider {
/**
* Obtain a {@link ParamConverter} that can provide from/to string conversion
* for an instance of a particular Java type.
*
* @param the supported Java type convertible to/from a {@code String} format.
* @param rawType the raw type of the object to be converted.
* @param genericType the type of object to be converted. E.g. if an String value
* representing the injected request parameter
* is to be converted into a method parameter, this will be the
* formal type of the method parameter as returned by {@code Class.getGenericParameterTypes}.
* @param annotations an array of the annotations associated with the convertible
* parameter instance. E.g. if a string value is to be converted into a method parameter,
* this would be the annotations on that parameter as returned by
* {@link java.lang.reflect.Method#getParameterAnnotations}.
* @return the string converter, otherwise {@code null}.
*/
public ParamConverter getConverter(Class rawType, Type genericType, Annotation annotations[]);
}