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package javax.ws.rs.ext;

/**
 * Interface for message body reader interceptors that wrap around calls
 * to {@link javax.ws.rs.ext.MessageBodyReader#readFrom}.
 * 

* Providers implementing {@code ReaderInterceptor} 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. * Message body interceptor instances may also be discovered and * bound {@link javax.ws.rs.container.DynamicFeature dynamically} to particular resource methods. *

* * @author Santiago Pericas-Geertsen * @author Bill Burke * @author Marek Potociar * @see MessageBodyReader * @since 2.0 */ public interface ReaderInterceptor { /** * Interceptor method wrapping calls to {@link MessageBodyReader#readFrom} method. * * The parameters of the wrapped method called are available from {@code context}. * Implementations of this method SHOULD explicitly call {@link ReaderInterceptorContext#proceed} * to invoke the next interceptor in the chain, and ultimately the wrapped * {@link MessageBodyReader#readFrom} method. * * @param context invocation context. * @return result of next interceptor invoked or the wrapped method if last interceptor in chain. * @throws java.io.IOException if an IO error arises or is thrown by the wrapped * {@code MessageBodyReader.readFrom} method. * @throws javax.ws.rs.WebApplicationException * thrown by the wrapped {@code MessageBodyReader.readFrom} method. */ public Object aroundReadFrom(ReaderInterceptorContext context) throws java.io.IOException, javax.ws.rs.WebApplicationException; }




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