Examples of javax.ws.rs.ext.MessageBodyReader

javax.ws.rs.ext.MessageBodyReader
Contract for a provider that supports the conversion of a stream to a Java type. A {@code MessageBodyReader} implementation may be annotatedwith {@link javax.ws.rs.Consumes} to restrict the media types for which it willbe considered suitable.
Providers implementing {@code MessageBodyReader} contract must be either programmaticallyregistered in a JAX-RS runtime or must be annotated with {@link javax.ws.rs.ext.Provider @Provider} annotation to be automatically discoveredby the JAX-RS runtime during a provider scanning phase.
@param < T> Java type supported by the provider @author Paul Sandoz @author Marc Hadley @see Provider @see javax.ws.rs.Consumes @since 1.0

   public <T> T doRead(Class<T> type, Type genericType, MediaType mediaType,
                       Annotation[] annotations,
                       MultivaluedMap<String, String> requestHeaders, InputStream inputStream)
           throws IOException
   {
      MessageBodyReader reader = factory.getMessageBodyReader(type,
              genericType, annotations, mediaType);
      if (reader == null)
      {
         throw createReaderNotFound(genericType, mediaType);
      }

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      addMessageBodyReader(provider, false);
   }


   public void addMessageBodyReader(Class<? extends MessageBodyReader> provider, boolean isBuiltin)
   {
      MessageBodyReader reader = getProviderInstance(provider);
      addMessageBodyReader(reader, isBuiltin);
   }

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         if (encoded) return request.getFormParameters();
         else return request.getDecodedFormParameters();
      }
      else
      {
         MessageBodyReader reader = factory.getMessageBodyReader(type,
                 genericType, annotations, mediaType);
         if (reader == null)
         {
            return new BadRequestException(
                    "Could not find message body reader for type: "

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         useGeneric = param.getActualTypeArguments()[0];
         useType = Types.getRawType(useGeneric);
      }




      MessageBodyReader reader1 = providerFactory.getMessageBodyReader(useType,
              useGeneric, this.annotations, media);
      if (reader1 == null)
      {
         throw createResponseFailure(format(
                 "Unable to find a MessageBodyReader of content-type %s and type %s",

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    }
    
    @SuppressWarnings({ "unchecked", "rawtypes" })
    @Test
    public void testReadFrom() throws Exception {
        MessageBodyReader p = new BinaryDataProvider();
        byte[] bytes = (byte[])p.readFrom(byte[].class, byte[].class, new Annotation[]{}, 
                                          MediaType.APPLICATION_OCTET_STREAM_TYPE, 
                                          new MetadataMap<String, Object>(), 
                                          new ByteArrayInputStream("hi".getBytes()));
        assertTrue(Arrays.equals(new String("hi").getBytes(), bytes));
        
        InputStream is = (InputStream)p.readFrom(InputStream.class, InputStream.class, new Annotation[]{}, 
                                                 MediaType.APPLICATION_OCTET_STREAM_TYPE, 
                                                 new MetadataMap<String, Object>(), 
            new ByteArrayInputStream("hi".getBytes()));
        bytes = IOUtils.readBytesFromStream(is);
        assertTrue(Arrays.equals(new String("hi").getBytes(), bytes));
        
        Reader r = (Reader)p.readFrom(Reader.class, Reader.class, new Annotation[]{}, 
                                      MediaType.APPLICATION_OCTET_STREAM_TYPE, 
                                      new MetadataMap<String, Object>(),
                                      new ByteArrayInputStream("hi".getBytes()));
        assertEquals(IOUtils.toString(r), "hi");
    }

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    private static class MessageBodyReaderComparator 
        implements Comparator<ProviderInfo<MessageBodyReader>> {
        
        public int compare(ProviderInfo<MessageBodyReader> p1, 
                           ProviderInfo<MessageBodyReader> p2) {
            MessageBodyReader e1 = p1.getProvider();
            MessageBodyReader e2 = p2.getProvider();
            
            ConsumeMime c = e1.getClass().getAnnotation(ConsumeMime.class);
            String[] mimeType1 = {"*/*"};
            if (c != null) {
                mimeType1 = c.value();               
            }
            
            ConsumeMime c2 = e2.getClass().getAnnotation(ConsumeMime.class);
            String[] mimeType2 = {"*/*"};
            if (c2 != null) {
                mimeType2 = c2.value();               
            }

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            // won't happen at this stage
        }
        
        MediaType contentType = getResponseContentType(r);
        
        MessageBodyReader mbr = ProviderFactory.getInstance(outMessage).createMessageBodyReader(
            cls, type, anns, contentType, outMessage);
        if (mbr == null) {
            ProviderFactory.getInstance().createMessageBodyReader(
                cls, type, anns, contentType, outMessage);
        }
        if (mbr != null) {
            try {
                return mbr.readFrom(cls, type, anns, contentType, 
                       new MetadataMap<String, Object>(r.getMetadata(), true, true), inputStream);
            } catch (Exception ex) {
                throw new WebApplicationException(ex);
            }

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    private static class MessageBodyReaderComparator 
        implements Comparator<ProviderInfo<MessageBodyReader>> {
        
        public int compare(ProviderInfo<MessageBodyReader> p1, 
                           ProviderInfo<MessageBodyReader> p2) {
            MessageBodyReader e1 = p1.getProvider();
            MessageBodyReader e2 = p2.getProvider();
            List<MediaType> types1 = JAXRSUtils.getProviderConsumeTypes(e1);
            types1 = JAXRSUtils.sortMediaTypes(types1);
            List<MediaType> types2 = JAXRSUtils.getProviderConsumeTypes(e2);
            types2 = JAXRSUtils.sortMediaTypes(types2);

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                                                  List<MediaType> consumeTypes,
                                                  Message m) {
        
        List<MediaType> types = JAXRSUtils.intersectMimeTypes(consumeTypes, contentType);
        
        MessageBodyReader provider = null;
        for (MediaType type : types) { 
            provider = ProviderFactory.getInstance(m)
                .createMessageBodyReader(targetTypeClass,
                                         parameterType,
                                         parameterAnnotations,
                                         type,
                                         m);
            if (provider != null) {
                try {
                    HttpHeaders headers = new HttpHeadersImpl(m);
                    return provider.readFrom(
                              targetTypeClass, parameterType, parameterAnnotations, contentType,
                              headers.getRequestHeaders(), is);
                } catch (IOException e) {
                    String errorMessage = "Error deserializing input stream into target class "
                                          + targetTypeClass.getSimpleName()

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            }
        }
        
        MediaType contentType = getResponseContentType(r);
        
        MessageBodyReader mbr = ProviderFactory.getInstance(inMessage).createMessageBodyReader(
            cls, type, anns, contentType, inMessage);
        if (mbr != null) {
            try {
                return mbr.readFrom(cls, type, anns, contentType, 
                       new MetadataMap<String, Object>(r.getMetadata(), true, true), inputStream);
            } catch (Exception ex) {
                reportMessageHandlerProblem("MSG_READER_PROBLEM", cls, contentType, ex, r);
            }
        } else if (cls == Response.class) {

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