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package javax.ws.rs.ext;
import java.io.IOException;
import java.io.InputStream;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MultivaluedMap;
/**
* Context class used by {@link javax.ws.rs.ext.ReaderInterceptor}
* to intercept calls to (@link javax.ws.rs.ext.MessageBodyReader#readFrom}.
* The getters and setters in this context class correspond to the
* parameters of the intercepted method.
*
* @author Santiago Pericas-Geertsen
* @author Bill Burke
* @see ReaderInterceptor
* @see MessageBodyReader
* @since 2.0
*/
public interface ReaderInterceptorContext extends InterceptorContext {
/**
* Proceed to the next interceptor in the chain. Return the result of the
* next interceptor invoked. Interceptors MUST explicitly call this method
* to continue the execution chain; the call to this method in the
* last interceptor of the chain will invoke the wrapped
* {@link javax.ws.rs.ext.MessageBodyReader#readFrom}.
*
* @return result of next interceptor invoked.
* @throws 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 proceed() throws IOException, WebApplicationException;
/**
* Get the input stream of the object to be read. The JAX-RS runtime is responsible
* for closing the input stream.
*
* @return input stream of the object to be read.
*/
public InputStream getInputStream();
/**
* Set the input stream of the object to be read. For example, by wrapping
* it with another input stream. The JAX-RS runtime is responsible for closing
* the input stream that is set.
*
* @param is new input stream.
*/
public void setInputStream(InputStream is);
/**
* Get mutable map of HTTP headers.
*
* Note that while the headers are mutable, a {@link ReaderInterceptor reader interceptor}
* should typically roll-back any header modifications once the call to {@link #proceed()
* context.proceed()} returns, to avoid externally visible side-effects of the interceptor
* invocation.
*
*
* @return map of HTTP headers.
*/
public MultivaluedMap getHeaders();
}