Examples of com.fasterxml.jackson.databind.ObjectWriter

com.fasterxml.jackson.databind.ObjectWriter
Builder object that can be used for per-serialization configuration of serialization parameters, such as JSON View and root type to use. (and thus fully thread-safe with no external synchronization); new instances are constructed for different configurations. Instances are initially constructed by {@link ObjectMapper} and can bereused in completely thread-safe manner with no explicit synchronization


    resp.setContentType("application/json");
    ObjectMapper om = new ObjectMapper();
    try
    {
      ObjectWriter writer = om.writer().withType(om.constructType(getClass().getMethod("prototype").getGenericReturnType()));
      writer.writeValue(resp.getOutputStream(), Lists.newArrayList(one, two, three));
    }
    catch (Exception e)
    {
      throw new ServletException(e);
    }

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        }
    }
    protected void writeView(DataView view, HttpOutputMessage outputMessage)
            throws IOException, HttpMessageNotWritableException {
        JsonEncoding encoding = getJsonEncoding(outputMessage.getHeaders().getContentType());
        ObjectWriter writer = getWriterForView(view.getView());
        JsonGenerator jsonGenerator = 
                writer.getFactory().createGenerator(outputMessage.getBody(), encoding);
        try {
            writer.writeValue(jsonGenerator, view.getData());
        }
        catch (IOException ex) {
            throw new HttpMessageNotWritableException("Could not write JSON: " + ex.getMessage(), ex);
        }
    }

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        mapper.addMixInAnnotations(Object.class, IgnoreTypeMixIn.class);
        
        final FilterProvider filters = new SimpleFilterProvider().addFilter("storedDataFilter", SimpleBeanPropertyFilter.serializeAllExcept("storedData"));


        final ObjectWriter ssWriter = mapper.writer(filters);
        final ObjectReader ssReader = mapper.reader(sus.getClass());
        
        final String susString = ssWriter.writeValueAsString(sus);
        System.out.println(susString);
        final StorelessUnivariateStatistic newSus = ssReader.readValue(susString);
        
        assertEquals(expected, newSus.getResult(), 0.1);
    }

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        ObjectMapper mapper = new ObjectMapper();
        mapper.findAndRegisterModules();
        
        mapper.addMixInAnnotations(Object.class, PortletRenderExecutionEventFilterMixIn.class);
        final FilterProvider filterProvider = new SimpleFilterProvider().addFilter(PortletRenderExecutionEventFilterMixIn.FILTER_NAME, SimpleBeanPropertyFilter.filterOutAllExcept("fname", "executionTimeNano", "parameters"));
        final ObjectWriter portletEventWriter = mapper.writer(filterProvider);
        
        final String result = portletEventWriter.writeValueAsString(createEvent());
        
        assertEquals("{\"@c\":\".PortletRenderExecutionEvent\",\"fname\":\"fname1\",\"executionTimeNano\":123450000,\"parameters\":{}}", result);
    }

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        //Clone from "shared" ObjectMapper
        mapper = mapper.copy();
        
        mapper.addMixInAnnotations(Object.class, PortletRenderExecutionEventFilterMixIn.class);
        final FilterProvider filterProvider = new SimpleFilterProvider().addFilter(PortletRenderExecutionEventFilterMixIn.FILTER_NAME, SimpleBeanPropertyFilter.filterOutAllExcept("fname", "executionTimeNano", "parameters"));
        final ObjectWriter portletEventWriter = mapper.writer(filterProvider);
        
        final String result = portletEventWriter.writeValueAsString(createEvent());
        
        assertEquals("{\"@c\":\".PortletRenderExecutionEvent\",\"fname\":\"fname1\",\"executionTimeNano\":123450000,\"parameters\":{}}", result);
    }

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        if (stats != null) {
            stats.setItemCount(listResponse.size());
        }
        
        final ObjectWriter w = useSmile ? _listSmileWriter : _listJsonWriter;
        final String contentType = useSmile ? ContentType.SMILE.toString()
                : ContentType.JSON.toString();
        return (OUT) response.ok(contentType, new StreamingEntityImpl(w, listResponse));
    }

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                }
                listResponse = new ListResponse<String>(names);
            }
            break;
        }
        final ObjectWriter w = useSmile ? _listSmileWriter : _listJsonWriter;
        final String contentType = useSmile ? ClusterMateConstants.CONTENT_TYPE_SMILE : ClusterMateConstants.CONTENT_TYPE_JSON;
        
        return (OUT) response.ok(new StreamingEntityImpl(w, listResponse))
                .setContentType(contentType);
    }

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        clusterStatus = (clusterHash == 0L || clusterHash != currentHash) ?
                _cluster.asMessage() : null;
        
        final SyncListResponse<E> resp = new SyncListResponse<E>(entries, timestamp.get(),
                currentHash, clusterStatus);
        final ObjectWriter w = useSmile ? _syncListSmileWriter : _syncListJsonWriter;
        final String contentType = useSmile ? ClusterMateConstants.CONTENT_TYPE_SMILE : ClusterMateConstants.CONTENT_TYPE_JSON;
        
        return (OUT) response.ok(new StreamingEntityImpl(w, resp))
                .setContentType(contentType);
    }

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        if (stats != null) {
            stats.setItemCount(listResponse.size());
        }
        
        final ObjectWriter w = useSmile ? _listSmileWriter : _listJsonWriter;
        final String contentType = useSmile ? ContentType.SMILE.toString()
                : ContentType.JSON.toString();
        return (OUT) response.ok(contentType, new StreamingEntityImpl(w, listResponse));
    }

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        long currentHash = _cluster.getHashOverState();
        resp.setClusterHash(currentHash);
        ClusterStatusMessage clusterStatus = (clusterHash == 0L || clusterHash != currentHash) ?
                _cluster.asMessage() : null;
        resp.setClusterStatus(clusterStatus);                
        final ObjectWriter w = useSmile ? _syncListSmileWriter : _syncListJsonWriter;
        final String contentType = useSmile ? ContentType.SMILE.toString() : ContentType.JSON.toString();
        
        return (OUT) response.ok(new StreamingEntityImpl(w, resp))
                .setContentType(contentType);
    }

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