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package javax.ws.rs.ext;

import javax.ws.rs.core.Response;

/**
 * Contract for a provider that maps Java exceptions to {@link javax.ws.rs.core.Response}.
 * 
 * Providers implementing {@code ExceptionMapper} 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.
 * 
 *
 * @param  exception type supported by the provider.
 * @author Paul Sandoz
 * @author Marc Hadley
 * @see Provider
 * @see javax.ws.rs.core.Response
 * @since 1.0
 */
public interface ExceptionMapper {

    /**
     * Map an exception to a {@link javax.ws.rs.core.Response}. Returning
     * {@code null} results in a {@link javax.ws.rs.core.Response.Status#NO_CONTENT}
     * response. Throwing a runtime exception results in a
     * {@link javax.ws.rs.core.Response.Status#INTERNAL_SERVER_ERROR} response.
     *
     * @param exception the exception to map to a response.
     * @return a response mapped from the supplied exception.
     */
    Response toResponse(E exception);
}