Examples of javax.ws.rs.ext.Providers

javax.ws.rs.ext.Providers
An injectable interface providing runtime lookup of provider instances. @see javax.ws.rs.core.Context @see MessageBodyReader @see MessageBodyWriter @see ContextResolver @see ExceptionMapper

        injectableFactory.add(
                new ContextInjectableProvider<MessageBodyWorkers>(
                        MessageBodyWorkers.class, bodyFactory));


        // Injection of Providers
        this.providers = new Providers() {
            @Override
            public <T> MessageBodyReader<T> getMessageBodyReader(Class<T> c, Type t,
                                                                 Annotation[] as, MediaType m) {
                return bodyFactory.getMessageBodyReader(c, t, as, m);
            }

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                ThreadLocalContextManager.SECURITY_CONTEXT.set(binding);
            } else if (ContextResolver.class.equals(type)) {
                final ContextResolver<?> binding = JAXRSUtils.createContextValue(exchange.getInMessage(), type, ContextResolver.class);
                ThreadLocalContextManager.CONTEXT_RESOLVER.set(binding);
            } else if (Providers.class.equals(type)) {
                final Providers providers = JAXRSUtils.createContextValue(exchange.getInMessage(), null, Providers.class);
                ThreadLocalContextManager.PROVIDERS.set(providers);
            } else if (ServletRequest.class.equals(type)) {
                ServletRequest servletRequest = JAXRSUtils.createContextValue(exchange.getInMessage(), null, ServletRequest.class);
                if (servletRequest == null) { // probably the case with CXF
                    servletRequest = JAXRSUtils.createContextValue(exchange.getInMessage(), null, HttpServletRequest.class);

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     */
    public <T> T getContextFromResolver(Class<T> contextClass, RuntimeContext runtimeContext) {
        if (runtimeContext == null) {
            return null;
        }
        Providers providers = runtimeContext.getProviders();
        if (providers != null) {
            HttpHeaders httpHeaders = runtimeContext.getHttpHeaders();
            MediaType mediaType = null;
            if (httpHeaders != null) {
                // this is hotfix for WINK-166
                mediaType = httpHeaders.getMediaType();
            }
            if (mediaType == null) {
                mediaType = MediaType.WILDCARD_TYPE;
            }
            ContextResolver<T> contextResolver =
                providers.getContextResolver(contextClass, mediaType);
            if (contextResolver != null) {
                T context = contextResolver.getContext(contextClass);
                if (context != null) {
                    return context;
                }

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             * from which to retrieve or inject providers.
             */


            RuntimeContext tempRuntimeContext = RuntimeContextTLS.getRuntimeContext();
            if (tempRuntimeContext == null) {
                final Providers p = providers;
                RuntimeContextTLS.setRuntimeContext(new AbstractRuntimeContext() {
                    {
                        setAttribute(Providers.class, p);
                    }

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        // make providers to return CsvSerializerProvider
        CsvSyndFeedSerializerProvider syndFeedSerializerProvider =
            new CsvSyndFeedSerializerProvider();
        Field field = CsvSyndFeedSerializerProvider.class.getDeclaredField("providers");
        field.setAccessible(true);
        field.set(syndFeedSerializerProvider, new Providers() {


            public <T> ContextResolver<T> getContextResolver(Class<T> contextType,
                                                             MediaType mediaType) {
                return null;
            }

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        // we have an entity, get the response media type
        // the actual writing will take places in the flush
        MediaType responseMediaType = context.getResponseMediaType();


        // get the provider to write the entity
        Providers providers = context.getProviders();
        MessageBodyWriter<Object> messageBodyWriter =
            (MessageBodyWriter<Object>)providers.getMessageBodyWriter(rawType,
                                                                      genericType,
                                                                      declaredAnnotations,
                                                                      responseMediaType);


        // use the provider to write the entity

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            }


            Class<?> paramType = getType();


            // check if there is a provider that can handle this parameter
            Providers providers = runtimeContext.getProviders();
            if (providers != null) {
                MediaType mediaType = runtimeContext.getHttpHeaders().getMediaType();
                if (mediaType == null) {
                    mediaType = MediaType.APPLICATION_OCTET_STREAM_TYPE;
                }
                MessageBodyReader mbr =
                    providers.getMessageBodyReader(paramType,
                                                   getGenericType(),
                                                   getAnnotations(),
                                                   mediaType);


                if (mbr != null) {

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        try {
            RestClient client = new RestClient();
            Resource resource =
                client.resource(MessageFormat.format(SERVICE_URL, String.valueOf(server
                    .getServerPort())));
            Providers providers = RuntimeContextTLS.getRuntimeContext().getProviders();
            MessageBodyReader<AtomFeed> afp =
                providers.getMessageBodyReader(AtomFeed.class,
                                               AtomFeed.class,
                                               null,
                                               MediaType.APPLICATION_ATOM_XML_TYPE);
            AtomFeed entryToPost =
                afp.readFrom(AtomFeed.class,
                             null,
                             null,
                             MediaType.APPLICATION_ATOM_XML_TYPE,
                             null,
                             new ByteArrayInputStream(FEED.getBytes()));
            AtomFeed responseEntity =
                resource.accept(MediaType.APPLICATION_ATOM_XML_TYPE)
                    .contentType(MediaType.APPLICATION_ATOM_XML_TYPE).post(AtomFeed.class,
                                                                           entryToPost);


            ByteArrayOutputStream os = new ByteArrayOutputStream();
            MessageBodyWriter<AtomFeed> writer = 
                providers.getMessageBodyWriter(AtomFeed.class,
                                               AtomFeed.class,
                                               null,
                                               MediaType.APPLICATION_ATOM_XML_TYPE);
            writer.writeTo(responseEntity,
                        AtomFeed.class,

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     */
    public <T> T getContextFromResolver(Class<T> contextClass, RuntimeContext runtimeContext) {
        if (runtimeContext == null) {
            return null;
        }
        Providers providers = runtimeContext.getProviders();
        if (providers != null) {
            HttpHeaders httpHeaders = runtimeContext.getHttpHeaders();
            MediaType mediaType = null;
            if (httpHeaders != null) {
                // this is hotfix for WINK-166
                mediaType = httpHeaders.getMediaType();
            }
            if (mediaType == null) {
                mediaType = MediaType.WILDCARD_TYPE;
            }
            ContextResolver<T> contextResolver =
                providers.getContextResolver(contextClass, mediaType);
            if (contextResolver != null) {
                T context = contextResolver.getContext(contextClass);
                if (context != null) {
                    return context;
                }

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             * from which to retrieve or inject providers.
             */


            RuntimeContext tempRuntimeContext = RuntimeContextTLS.getRuntimeContext();
            if (tempRuntimeContext == null) {
                final Providers p = providers;
                RuntimeContextTLS.setRuntimeContext(new AbstractRuntimeContext() {
                    {
                        setAttribute(Providers.class, p);
                    }

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