Examples of com.fasterxml.jackson.core.JsonGenerator.writeObject()

Class com.fasterxml.jackson.core.JsonGenerator

Examples of com.fasterxml.jackson.core.JsonGenerator.writeObject()

com.fasterxml.jackson.core.JsonGenerator.writeObject()
Method for writing given Java object (POJO) as Json. Exactly how the object gets written depends on object in question (ad on codec, its configuration); for most beans it will result in Json object, but for others Json array, or String or numeric value (and for nulls, Json null literal. NOTE: generator must have its object codec set to non-null value; for generators created by a mapping factory this is the case, for others not.

        throws IOException
    {
        JsonFactory jf = new MappingJsonFactory();
        StringWriter sw = new StringWriter();
        JsonGenerator gen = jf.createGenerator(sw);
        gen.writeObject(new Pojo());
        gen.close();
        // trimming needed if main-level object has leading space
        String act = sw.toString().trim();
        assertEquals("{\"x\":4}", act);
    }

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        // regular factory can't do it, without a call to setCodec()
        JsonFactory jf = new JsonFactory();
        try {
            StringWriter sw = new StringWriter();
            JsonGenerator gen = jf.createGenerator(sw);
            gen.writeObject(new Pojo());
            gen.close();
            fail("Expected an exception: got sw '"+sw.toString()+"'");
        } catch (IllegalStateException e) {
            verifyException(e, "No ObjectCodec defined");
        }

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      jg.setCodec(objectMapper);


      List<MapReducePhase> phases = spec.getPhases();
      phases.get(phases.size() - 1).setKeep(true);
      jg.writeObject(spec);


      jg.flush();


      return out.toString("UTF8");

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    // testDao.add(test);
    ObjectMapper mapper = new ObjectMapper();
    JsonGenerator jsonGenerator = mapper.getJsonFactory().createJsonGenerator(System.out, JsonEncoding.UTF8);
    // mapper.getJsonFactory().createjsong


    jsonGenerator.writeObject(test);
    System.out.println();
    mapper.writeValue(System.out, test);


    return null;
  }

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            final List<Annotation> annotations = dps.getAnnotations();
            if (annotations != null) {
              Collections.sort(annotations);
              json.writeArrayFieldStart("annotations");
              for (Annotation note : annotations) {
                json.writeObject(note);
              }
              json.writeEndArray();
            }
            
            if (globals != null && !globals.isEmpty()) {

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            if (globals != null && !globals.isEmpty()) {
              Collections.sort(globals);
              json.writeArrayFieldStart("globalAnnotations");
              for (Annotation note : globals) {
                json.writeObject(note);
              }
              json.writeEndArray();
            }
          }

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                .setCodec(objectMapper);


            generator.writeStartArray();


            for (Cell<ObjectName, String, Object> cell : collectedData.cellSet()) {
                generator.writeObject(new DataPoint(systemTimeMillis, cell, instanceTags));
            }


            generator.writeEndArray();
            generator.flush();
            gzipOutputStream.finish();

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      jg.setCodec(objectMapper);


      List<MapReducePhase> phases = spec.getPhases();
      phases.get(phases.size() - 1).setKeep(true);
      jg.writeObject(spec);


      jg.flush();


      return out.toString("UTF8");

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    public String marshall(T obj) {
        try {
            JsonFactory jsonFactory = new MappingJsonFactory();
            StringWriter output = new StringWriter();
            JsonGenerator jsonGenerator = jsonFactory.createJsonGenerator(output);
            jsonGenerator.writeObject(obj);
            return output.toString();
        } catch ( Exception e ) {
            throw new RuntimeException(e);
        }
    }

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    public String marshall(T obj) {
        try {
            JsonFactory jsonFactory = new MappingJsonFactory();
            StringWriter output = new StringWriter();
            JsonGenerator jsonGenerator = jsonFactory.createJsonGenerator(output);
            jsonGenerator.writeObject(obj);
            return output.toString();
        } catch ( Exception e ) {
            throw new RuntimeException(e);
        }
    }

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