Examples of com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString()

Class com.fasterxml.jackson.databind.ObjectMapper

Examples of com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString()

com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString()
Method that can be used to serialize any Java value as a String. Functionally equivalent to calling {@link #writeValue(Writer,Object)} with {@link java.io.StringWriter}and constructing String, but more efficient.

    }


    public void testNullStringGetter() throws Exception
    {
        ObjectMapper m = new ObjectMapper();
        String result = m.writeValueAsString(new ClassGetter<String>(null));
        String expected = "{\"nonRaw\":null,\"raw\":null,\"value\":null}";
        assertEquals(expected, result);
    }


}

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        ObjectMapper mapper = new ObjectMapper();
        JsonFactory f =  new JsonFactory();


        // loop more than once, just to ensure caching works ok (during second round)
        for (int i = 0; i < 3; ++i) {
            String str = mapper.writeValueAsString(doc);
            
            JsonParser jp = f.createParser(str);
            assertEquals(JsonToken.START_ARRAY, jp.nextToken());
            
            assertEquals(JsonToken.VALUE_STRING, jp.nextToken());

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        doc.put("int", Integer.valueOf(137));
        doc.put("foo bar", Long.valueOf(1234567890L));


        ObjectMapper mapper = new ObjectMapper();
        for (int i = 0; i < 3; ++i) {
            String str = mapper.writeValueAsString(doc);
            JsonParser jp = f.createParser(str);
            
            assertEquals(JsonToken.START_OBJECT, jp.nextToken());
            
            assertEquals(JsonToken.FIELD_NAME, jp.nextToken());

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    {
        String json = "{\"field\":\"{\\\"name\\\":\\\"John Smith\\\"}\"}";
        ObjectMapper mapper = new ObjectMapper();
        JsonNode jNode = mapper.readValue(json, JsonNode.class);


        String generated = mapper.writeValueAsString( jNode);  //back slashes are gone
        JsonNode out = mapper.readValue( generated, JsonNode.class );   //crashes here
        assertTrue(out.isObject());
        assertEquals(1, out.size());
        String value = out.path("field").asText();
        assertNotNull(value);

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        Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse
            (new InputSource(new StringReader(SIMPLE_XML)));
        assertNotNull(doc);
        ObjectMapper mapper = new ObjectMapper();
        // need to strip xml declaration, if any
        String outputRaw = mapper.writeValueAsString(doc);
        // And re-parse as String, since JSON has quotes...
        String output = mapper.readValue(outputRaw, String.class);
        /* ... and finally, normalize to (close to) canonical XML
         * output (single vs double quotes, xml declaration etc)
         */

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      outer.setInner(inner);


      ObjectMapper mapper = new ObjectMapper();


      try {
          mapper.writeValueAsString(outer);
           fail("Expected exception to be thrown.");
      } catch (JsonMappingException ex) {
          verifyException(ex, "requires use of type information");
      }
  }

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    outer.setInner(inner);


    ObjectMapper mapper = new ObjectMapper();
    mapper = mapper.disable(SerializationFeature.FAIL_ON_UNWRAPPED_TYPE_IDENTIFIERS);


    String json = mapper.writeValueAsString(outer);
    assertEquals("{\"@type\":\"OuterType\",\"p1\":\"101\",\"p2\":\"202\"}", json);
  }
}

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    public void testSimpleGetters() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        mapper.setPropertyNamingStrategy(new PrefixStrategy());
        assertEquals("{\"Get-key\":123}", mapper.writeValueAsString(new GetterBean()));
    }


    public void testSimpleSetters() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();

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    public void testSimpleFields() throws Exception
    {
        // First serialize
        ObjectMapper mapper = new ObjectMapper();
        mapper.setPropertyNamingStrategy(new PrefixStrategy());
        String json = mapper.writeValueAsString(new FieldBean(999));
        assertEquals("{\"Field-key\":999}", json);


        // then deserialize
        FieldBean result = mapper.readValue(json, FieldBean.class);
        assertEquals(999, result.key);

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    public void testCStyleNaming() throws Exception
    {
        // First serialize
        ObjectMapper mapper = new ObjectMapper();
        mapper.setPropertyNamingStrategy(new CStyleStrategy());
        String json = mapper.writeValueAsString(new PersonBean("Joe", "Sixpack", 42));
        assertEquals("{\"first_name\":\"Joe\",\"last_name\":\"Sixpack\",\"age\":42}", json);
        
        // then deserialize
        PersonBean result = mapper.readValue(json, PersonBean.class);
        assertEquals("Joe", result.firstName);

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