Examples with NoContentException javax.ws.rs.core.NoContentException used on opensource projects

Example 6 with NoContentException

use of javax.ws.rs.core.NoContentException in project cxf by apache.

the class ResponseImpl method doReadEntity.

public <T> T doReadEntity(Class<T> cls, Type t, Annotation[] anns) throws ProcessingException, IllegalStateException {
    checkEntityIsClosed();
    if (lastEntity != null && cls.isAssignableFrom(lastEntity.getClass()) && !(lastEntity instanceof InputStream)) {
        return cls.cast(lastEntity);
    }
    MediaType mediaType = getMediaType();
    if (mediaType == null) {
        mediaType = MediaType.WILDCARD_TYPE;
    }
    // the stream is available if entity is IS or
    // message contains XMLStreamReader or Reader
    boolean entityStreamAvailable = entityStreamAvailable();
    InputStream entityStream = null;
    if (!entityStreamAvailable) {
        // try create a stream if the entity is String or Number
        entityStream = convertEntityToStreamIfPossible();
        entityStreamAvailable = entityStream != null;
    } else if (entity instanceof InputStream) {
        entityStream = InputStream.class.cast(entity);
    } else {
        Message inMessage = getResponseMessage();
        Reader reader = inMessage.getContent(Reader.class);
        if (reader != null) {
            entityStream = InputStream.class.cast(new ReaderInputStream(reader));
        }
    }
    // we need to check for readers even if no IS is set - the readers may still do it
    List<ReaderInterceptor> readers = outMessage == null ? null : ProviderFactory.getInstance(outMessage).createMessageBodyReaderInterceptor(cls, t, anns, mediaType, outMessage, entityStreamAvailable, null);
    if (readers != null) {
        // By default, the response entity was never closed automatically which is not compliant
        // with JAX-RS specification and TCK. The auto-close behavior is controlled by
        // ResponseImpl#RESPONSE_STREAM_AUTO_CLOSE property which is set to "false" by default.
        // The autoCloseHint alters the default value of this property to be "true" for all
        // non-streaming and non-streaming like responses (to minimize the impact of the change
        // as much as possible) in order to follow the specification.
        final boolean autoCloseHint = !JAXRSUtils.isStreamingLikeOutType(cls, t);
        try {
            if (entityBufferred) {
                InputStream.class.cast(entity).reset();
            }
            Message responseMessage = getResponseMessage();
            responseMessage.put(Message.PROTOCOL_HEADERS, getHeaders());
            lastEntity = JAXRSUtils.readFromMessageBodyReader(readers, cls, t, anns, entityStream, mediaType, responseMessage);
            // close the entity after readEntity is called.
            T tCastLastEntity = castLastEntity();
            autoCloseWithHint(cls, autoCloseHint, false);
            return tCastLastEntity;
        } catch (NoContentException ex) {
            // check if basic type. Basic type throw exception, else return null.
            if (isBasicType(cls)) {
                autoClose(cls, true);
                reportMessageHandlerProblem("MSG_READER_PROBLEM", cls, mediaType, ex);
            } else {
                autoCloseWithHint(cls, autoCloseHint, false);
                return null;
            }
        } catch (Exception ex) {
            autoClose(cls, true);
            reportMessageHandlerProblem("MSG_READER_PROBLEM", cls, mediaType, ex);
        } finally {
            ProviderFactory pf = ProviderFactory.getInstance(outMessage);
            if (pf != null) {
                pf.clearThreadLocalProxies();
            }
        }
    } else if (entity != null && cls.isAssignableFrom(entity.getClass())) {
        lastEntity = entity;
        return castLastEntity();
    } else if (entityStreamAvailable) {
        reportMessageHandlerProblem("NO_MSG_READER", cls, mediaType, null);
    }
    throw new IllegalStateException("The entity is not backed by an input stream, entity class is : " + (entity != null ? entity.getClass().getName() : cls.getName()));
}