Package com.fasterxml.jackson.databind

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

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    public void testSerialization() throws Exception
    {
        // serialization can detect type name ok without anything extra:
        SubB bean = new SubB();
        ObjectMapper mapper = new ObjectMapper();
        assertEquals("{\"@type\":\"TypeB\",\"b\":1}", mapper.writeValueAsString(bean));

        // but we can override type name here too
        mapper = new ObjectMapper();
        mapper.registerSubtypes(new NamedType(SubB.class, "typeB"));
        assertEquals("{\"@type\":\"typeB\",\"b\":1}", mapper.writeValueAsString(bean));
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        assertEquals("{\"@type\":\"TypeB\",\"b\":1}", mapper.writeValueAsString(bean));

        // but we can override type name here too
        mapper = new ObjectMapper();
        mapper.registerSubtypes(new NamedType(SubB.class, "typeB"));
        assertEquals("{\"@type\":\"typeB\",\"b\":1}", mapper.writeValueAsString(bean));

        // and default name ought to be simple class name; with context
        assertEquals("{\"@type\":\"TestSubtypes$SubD\",\"d\":0}", mapper.writeValueAsString(new SubD())); 
    }
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        mapper = new ObjectMapper();
        mapper.registerSubtypes(new NamedType(SubB.class, "typeB"));
        assertEquals("{\"@type\":\"typeB\",\"b\":1}", mapper.writeValueAsString(bean));

        // and default name ought to be simple class name; with context
        assertEquals("{\"@type\":\"TestSubtypes$SubD\",\"d\":0}", mapper.writeValueAsString(new SubD())); 
    }

    public void testDeserializationNonNamed() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
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    public void testEmptyBean() throws Exception
    {
        // First, with annotations
        ObjectMapper mapper = new ObjectMapper();
        mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, true);
        String json = mapper.writeValueAsString(new EmptyBean());
        assertEquals("{\"@type\":\"TestSubtypes$EmptyBean\"}", json);

        mapper = new ObjectMapper();
        mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
        json = mapper.writeValueAsString(new EmptyBean());
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        String json = mapper.writeValueAsString(new EmptyBean());
        assertEquals("{\"@type\":\"TestSubtypes$EmptyBean\"}", json);

        mapper = new ObjectMapper();
        mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
        json = mapper.writeValueAsString(new EmptyBean());
        assertEquals("{\"@type\":\"TestSubtypes$EmptyBean\"}", json);

        // and then with defaults
        mapper = new ObjectMapper();
        mapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
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        // and then with defaults
        mapper = new ObjectMapper();
        mapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
        json = mapper.writeValueAsString(new EmptyNonFinal());
        assertEquals("[\"com.fasterxml.jackson.databind.jsontype.TestSubtypes$EmptyNonFinal\",{}]", json);
    }

    public void testDefaultImpl() throws Exception
    {
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        ObjectMapper m = new ObjectMapper();
        String json;
        DynamicWrapper result;

        // first, check "native" types
        json = m.writeValueAsString(new DynamicWrapper(Integer.valueOf(3)));
        result = m.readValue(json, DynamicWrapper.class);
        assertEquals(Integer.valueOf(3), result.value);

        json = m.writeValueAsString(new DynamicWrapper("abc"));
        result = m.readValue(json, DynamicWrapper.class);
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        // first, check "native" types
        json = m.writeValueAsString(new DynamicWrapper(Integer.valueOf(3)));
        result = m.readValue(json, DynamicWrapper.class);
        assertEquals(Integer.valueOf(3), result.value);

        json = m.writeValueAsString(new DynamicWrapper("abc"));
        result = m.readValue(json, DynamicWrapper.class);
        assertEquals("abc", result.value);

        json = m.writeValueAsString(new DynamicWrapper("abc"));
        result = m.readValue(json, DynamicWrapper.class);
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        json = m.writeValueAsString(new DynamicWrapper("abc"));
        result = m.readValue(json, DynamicWrapper.class);
        assertEquals("abc", result.value);

        json = m.writeValueAsString(new DynamicWrapper("abc"));
        result = m.readValue(json, DynamicWrapper.class);
        assertEquals("abc", result.value);

        json = m.writeValueAsString(new DynamicWrapper(Boolean.TRUE));
        result = m.readValue(json, DynamicWrapper.class);
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        json = m.writeValueAsString(new DynamicWrapper("abc"));
        result = m.readValue(json, DynamicWrapper.class);
        assertEquals("abc", result.value);

        json = m.writeValueAsString(new DynamicWrapper(Boolean.TRUE));
        result = m.readValue(json, DynamicWrapper.class);
        assertEquals(Boolean.TRUE, result.value);
       
        // then verify other scalars
        json = m.writeValueAsString(new DynamicWrapper(Long.valueOf(7L)));
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