Examples of com.fasterxml.jackson.databind.ObjectMapper

com.fasterxml.jackson.databind.ObjectMapper
This mapper (or, data binder, or codec) provides functionality for converting between Java objects (instances of JDK provided core classes, beans), and matching JSON constructs. It will use instances of {@link JsonParser} and {@link JsonGenerator}for implementing actual reading/writing of JSON.
The main conversion API is defined in {@link ObjectCodec}, so that implementation details of this class need not be exposed to streaming parser and generator classes.
Note on caching: root-level deserializers are always cached, and accessed using full (generics-aware) type information. This is different from caching of referenced types, which is more limited and is done only for a subset of all deserializer types. The main reason for difference is that at root-level there is no incoming reference (and hence no referencing property, no referral information or annotations to produce differing deserializers), and that the performance impact greatest at root level (since it'll essentially cache the full graph of deserializers involved).

  private static final Logger log = LoggerFactory.getLogger(Marshaller.class);


  final ObjectMapper jsonMapper = buildJsonMapper();


  private ObjectMapper buildJsonMapper() {
    ObjectMapper mapper = new ObjectMapper();
    return mapper;
  }

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  // return stringWriter.toString();
  // }
  //


  public String marshal(T object, boolean formatted) throws JsonProcessingException, IOException {
    ObjectMapper mapper = JsonHelper.buildObjectMapper(null, formatted);


    return mapper.writeValueAsString(object);
  }

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    return json;
  }


  public static ObjectMapper buildObjectMapper(TypeFactory typeFactory, boolean formatted) {
    ObjectMapper mapper = new ObjectMapper();


    if (typeFactory == null) {
      typeFactory = TypeFactory.defaultInstance();
    }


    if (formatted) {
      mapper.enable(SerializationFeature.INDENT_OUTPUT);
    }


    // Favor JAXB annotations
    AnnotationIntrospector jaxbIntrospector = new JaxbAnnotationIntrospector(typeFactory);
    AnnotationIntrospector jacksonIntrospector = new JacksonAnnotationIntrospector();
    AnnotationIntrospector introspector = new AnnotationIntrospectorPair(jaxbIntrospector, jacksonIntrospector);
    mapper.setAnnotationIntrospector(introspector);


    return mapper;


  }

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  public ModelHandler(OptiqConnection connection, String uri)
    throws IOException {
    super();
    this.connection = connection;
    final ObjectMapper mapper = new ObjectMapper();
    mapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
    mapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
    mapper.configure(JsonParser.Feature.ALLOW_COMMENTS, true);
    JsonRoot root;
    if (uri.startsWith("inline:")) {
      root = mapper.readValue(
          uri.substring("inline:".length()), JsonRoot.class);
    } else {
      root = mapper.readValue(new File(uri), JsonRoot.class);
    }
    visit(root);
  }

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public class LoadAllCards
{
  public static void main(String[] args) throws JsonParseException, JsonMappingException, IOException
  {
    ObjectMapper mapper = new ObjectMapper();
    mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);


    @SuppressWarnings("unchecked")
    List<MTGCard> allCards = getAllCards((Map<String, MTGSet>)mapper.readValue(new File("AllSets.json"), new TypeReference<Map<String, MTGSet>>()  {}));
    
    System.out.println("Number of cards: " + allCards.size());
  }

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  protected void doParse(final Element element, final BeanDefinitionBuilder bean) {
    final String objectMapper = element.getAttribute("objectMapper");
    if (StringUtils.hasText(objectMapper)) {
      bean.addPropertyReference("objectMapper", objectMapper);
    } else {
      bean.addPropertyValue("objectMapper", new ObjectMapper());
    }
  }

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  }


  @Override
  public void afterPropertiesSet() {
    if (objectMapper == null) {
      objectMapper = new ObjectMapper();
    }
  }

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    final Map<Integer, FoodmartQuery> queries =
        new LinkedHashMap<Integer, FoodmartQuery>();


    private FoodMartQuerySet() throws IOException {
      final ObjectMapper mapper = new ObjectMapper();
      mapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
      mapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);


      final InputStream inputStream = new FoodMartQuery().getQueries();
      FoodmartRoot root = mapper.readValue(inputStream, FoodmartRoot.class);
      for (FoodmartQuery query : root.queries) {
        queries.put(query.id, query);
      }
    }

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/**
 * Unit test for data models.
 */
public class ModelTest {
  private ObjectMapper mapper() {
    final ObjectMapper mapper = new ObjectMapper();
    mapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
    mapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
    return mapper;
  }

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    return mapper;
  }


  /** Reads a simple schema from a string into objects. */
  @Test public void testRead() throws IOException {
    final ObjectMapper mapper = mapper();
    JsonRoot root = mapper.readValue(
        "{\n"
        + "  version: '1.0',\n"
        + "   schemas: [\n"
        + "     {\n"
        + "       name: 'FoodMart',\n"

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