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.

        assertEquals("{\"rudy\":{\"a\":3}}", json);
        Bean bean = mapper.readValue(json, Bean.class);
        assertNotNull(bean);


        // also same with explicitly "not defined"...
        json = mapper.writeValueAsString(new RootBeanWithEmpty());
        assertEquals("{\"RootBeanWithEmpty\":{\"a\":2}}", json);
        RootBeanWithEmpty bean2 = mapper.readValue(json, RootBeanWithEmpty.class);
        assertNotNull(bean2);
        assertEquals(2, bean2.a);
    }

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    public void testReconfiguringOfWrapping() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        // default: no wrapping
        final Bean input = new Bean();
        String jsonUnwrapped = mapper.writeValueAsString(input);
        assertEquals("{\"a\":3}", jsonUnwrapped);
        // secondary: wrapping
        String jsonWrapped = mapper.writer(SerializationFeature.WRAP_ROOT_VALUE)
            .writeValueAsString(input);
        assertEquals("{\"rudy\":{\"a\":3}}", jsonWrapped);

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    {
        final BoringBean input = new BoringBean();
        ObjectMapper m = new ObjectMapper();


        assertEquals(aposToQuotes("{'firstname':'Bob','lastname':'Burger'}"),
                m.writeValueAsString(input));
    }
}

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    {
        ObjectMapper mapper = new ObjectMapper();
        mapper.setHandlerInstantiator(new MyInstantiator("abc:"));
        MyMap map = mapper.readValue("{\"a\":\"b\"}", MyMap.class);
        // easiest to test by just serializing...
        assertEquals("{\"KEY\":\"b\"}", mapper.writeValueAsString(map));
    }
    
    public void testSerializer() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();

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    public void testSerializer() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        mapper.setHandlerInstantiator(new MyInstantiator("xyz:"));
        assertEquals(quote("xyz:456"), mapper.writeValueAsString(new MyBean("456")));
    }


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

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    public void testTypeIdResolver() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        mapper.setHandlerInstantiator(new MyInstantiator("foobar"));
        String json = mapper.writeValueAsString(new TypeIdBeanWrapper(new TypeIdBean(123)));
        // should now use our custom id scheme:
        assertEquals("{\"bean\":[\"!!!\",{\"x\":123}]}", json);
        // and bring it back too:
        TypeIdBeanWrapper result = mapper.readValue(json, TypeIdBeanWrapper.class);
        TypeIdBean bean = result.bean;

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    // for [JACKSON-672]
    public void testEscapingUsingMapper() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        mapper.configure(JsonGenerator.Feature.ESCAPE_NON_ASCII, true);
        mapper.writeValueAsString(String.valueOf((char) 257));
    }
}

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    {
        Map<Wat, Boolean> input = new HashMap<Wat, Boolean>();
        input.put(new Wat("3"), true);


        ObjectMapper mapper = new ObjectMapper();
        String json = mapper.writeValueAsString(input);
        assertEquals(aposToQuotes("{'3':'true'}"), json);
    }
}

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


    public void testSimpleNonStringGetter() throws Exception

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    public void testSimpleNonStringGetter() throws Exception
    {
        ObjectMapper m = new ObjectMapper();
        int value = 123;
        String result = m.writeValueAsString(new ClassGetter<Integer>(value));
        String expected = String.format("{\"nonRaw\":%d,\"raw\":%d,\"value\":%d}", value, value, value);
        assertEquals(expected, result);
    }


    public void testNullStringGetter() throws Exception

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