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).

    @SuppressWarnings("unchecked")
    public List<DBObject> createIndex() throws Exception {
        List<DBObject> indexList = new ArrayList<DBObject>();


        if (ObjectHelper.isNotEmpty(collectionIndex)) {
            HashMap<String, String> indexMap = new ObjectMapper().readValue(collectionIndex, HashMap.class);


            for (Map.Entry<String, String> set : indexMap.entrySet()) {
                DBObject index = new BasicDBObject();
                // MongoDB 2.4 upwards is restrictive about the type of the 'single field index' being
                // in use below (set.getValue())) as only an integer value type is accepted, otherwise

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    @SuppressWarnings("unchecked")
    public List<DBObject> createIndex() throws Exception {
        List<DBObject> indexList = new ArrayList<DBObject>();


        if (ObjectHelper.isNotEmpty(collectionIndex)) {
            HashMap<String, String> indexMap = new ObjectMapper().readValue(collectionIndex, HashMap.class);


            for (Map.Entry<String, String> set : indexMap.entrySet()) {
                DBObject index = new BasicDBObject();
                // MongoDB 2.4 upwards is restrictive about the type of the 'single field index' being
                // in use below (set.getValue())) as only an integer value type is accepted, otherwise

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    @Test
    public void testPolymorphicJacksonSerializationAndDeserialization()
    {
        ObjectMapper mapper = new ObjectMapper();


        SimpleModule testModule = new SimpleModule("testModule", new Version(1, 0, 0, null, null, null))
                .addDeserializer( QueryFilter.class, new QueryFilterDeserializer() )
                .addSerializer( LogicalFilter2.class, new LogicalFilter2Serializer() );


        mapper.registerModule(testModule);


        // Verifying that we can pass in a custom Mapper and create a new JsonUtil
        JsonUtil jsonUtil = JsonUtils.customJsonUtil( mapper );


        String testFixture = "/jsonUtils/testdomain/two/queryFilter-realAndLogical2.json";

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    super();


    SimpleModule gimpleModule = new SimpleModule("Gimple", Version.unknownVersion()).addDeserializer(GimpleOp.class,
        new GimpleOpDeserializer());


    mapper = new ObjectMapper();
    mapper.registerModule(gimpleModule);
  }

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    // Read in the JSON from the example resources
    InputStream is = BTCETradeHistoryJSONTest.class.getResourceAsStream("/v2/trade/example-trade-history-data.json");


    // Use Jackson to parse it
    ObjectMapper mapper = new ObjectMapper();
    BTCETradeHistoryReturn transactions = mapper.readValue(is, BTCETradeHistoryReturn.class);
    Map<Long, BTCETradeHistoryResult> result = transactions.getReturnValue();
    assertThat(result.size()).isEqualTo(32);
    Entry<Long, BTCETradeHistoryResult> firstEntry = result.entrySet().iterator().next();
    // Verify that the example data was unmarshalled correctly
    assertThat(firstEntry.getKey()).isEqualTo(7258275L);

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    // Read in the JSON from the example resources
    InputStream is = BTCETradeDataJSONTest.class.getResourceAsStream(file);


    // Use Jackson to parse it
    return new ObjectMapper().readValue(is, resultClass);
  }

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    // Read in the JSON from the example resources
    InputStream is = LakeBTCMarketDataJsonTest.class.getResourceAsStream("/marketdata/example-ticker-data.json");


    // Use Jackson to parse it
    ObjectMapper mapper = new ObjectMapper();


    LakeBTCTickers tickers = mapper.readValue(is, LakeBTCTickers.class);


    LakeBTCTicker cnyTicker = tickers.getCny();
    Ticker adaptedTicker = LakeBTCAdapters.adaptTicker(cnyTicker, CurrencyPair.BTC_CNY);


    assertThat(adaptedTicker.getAsk()).isEqualTo("3524.07");

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    // Read in the JSON from the example resources
    InputStream is = LakeBTCMarketDataJsonTest.class.getResourceAsStream("/marketdata/example-orderbook-data.json");


    // Use Jackson to parse it
    ObjectMapper mapper = new ObjectMapper();
    LakeBTCOrderBook orderBook = mapper.readValue(is, LakeBTCOrderBook.class);


    OrderBook adaptedOrderBook = LakeBTCAdapters.adaptOrderBook(orderBook, CurrencyPair.BTC_USD);


    List<LimitOrder> asks = adaptedOrderBook.getAsks();
    assertThat(asks.size()).isEqualTo(3);

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    // Read in the JSON from the example resources
    InputStream is = LakeBTCMarketDataJsonTest.class.getResourceAsStream("/marketdata/example-ticker-data.json");


    // Use Jackson to parse it
    ObjectMapper mapper = new ObjectMapper();


    LakeBTCTickers tickers = mapper.readValue(is, LakeBTCTickers.class);


    LakeBTCTicker cnyTicker = tickers.getCny();
    assertThat(cnyTicker.getAsk()).isEqualTo("3524.07");
    assertThat(cnyTicker.getBid()).isEqualTo("3517.13");
    assertThat(cnyTicker.getLast()).isEqualTo("3524.07");

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    // Read in the JSON from the example resources
    InputStream is = LakeBTCMarketDataJsonTest.class.getResourceAsStream("/marketdata/example-orderbook-data.json");


    // Use Jackson to parse it
    ObjectMapper mapper = new ObjectMapper();
    LakeBTCOrderBook orderBook = mapper.readValue(is, LakeBTCOrderBook.class);


    BigDecimal[][] asks = orderBook.getAsks();
    assertThat(asks).hasSize(3);
    assertThat(asks[0][0]).isEqualTo("564.87");
    assertThat(asks[0][1]).isEqualTo("22.371");

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