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package org.glassfish.jersey.spi;
import javax.ws.rs.ext.ExceptionMapper;
/**
* Provides lookup of {@link ExceptionMapper} instances that can be used
* to map exceptions to responses.
*
* @author Paul Sandoz
*/
public interface ExceptionMappers {
/**
* Get an exception mapping provider for a particular class of exception.
* Returns the provider whose generic type is the nearest superclass of
* {@code type}.
*
* @param type of the exception handled by the exception mapping provider.
* @param type the class of exception.
* @return an {@link ExceptionMapper} for the supplied type or {@code null}
* if none is found.
*/
public ExceptionMapper find(Class type);
/**
* Get an exception mapping provider for a particular exception instance.
*
* This method is similar to method {@link #find(Class)}. In addition it takes
* into an account the result of the {@link ExtendedExceptionMapper#isMappable(Throwable)}
* of any mapper that implements Jersey {@link ExtendedExceptionMapper} API.
* If an extended exception mapper returns {@code false} from {@code isMappable(Throwable)},
* the mapper is disregarded from the search.
* Exception mapping providers are checked one by one until a first provider returns
* {@code true} from the {@code isMappable(Throwable)} method or until a first provider
* is found which best supports the exception type and does not implement {@code ExtendedExceptionMapper}
* API (i.e. it is a standard JAX-RS {@link ExceptionMapper}). The order in which the providers are
* checked is determined by the distance of the declared exception mapper type and the actual exception
* type.
*
*
* Note that if an exception mapping provider does not implement {@link ExtendedExceptionMapper}
* it is always considered applicable for a given exception instance.
*
*
* @param exceptionInstance exception to be handled by the exception mapping provider.
* @param type of the exception handled by the exception mapping provider.
* @return an {@link ExceptionMapper} for the supplied exception instance type or {@code null} if none
* is found.
*/
public ExceptionMapper findMapping(T exceptionInstance);
}