Package com.fasterxml.jackson.databind

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

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    // externally typed things, mixed with other stuff...
    public void testMultipleTypeIdsDeserialization() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        mapper.registerSubtypes(ValueBean.class);
        String json = mapper.writeValueAsString(new ExternalBean3(3));
        ExternalBean3 result = mapper.readValue(json, ExternalBean3.class);
        assertNotNull(result);
        assertNotNull(result.value1);
        assertNotNull(result.value2);
        assertNotNull(result.value3);
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    // Also, it should be ok to use @JsonCreator as well...
    public void testExternalTypeWithCreator() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        mapper.registerSubtypes(ValueBean.class);
        String json = mapper.writeValueAsString(new ExternalBeanWithCreator(7));
        ExternalBeanWithCreator result = mapper.readValue(json, ExternalBeanWithCreator.class);
        assertNotNull(result);
        assertNotNull(result.value);
        assertEquals(7, ((ValueBean)result.value).value);
        assertEquals(7, result.foo);
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        TimeUnitBean bean = new TimeUnitBean();
        bean.timeUnit = TimeUnit.SECONDS;
       
        // First, without type info
        ObjectMapper m = new ObjectMapper();
        String json = m.writeValueAsString(bean);
        TimeUnitBean result = m.readValue(json, TimeUnitBean.class);
        assertEquals(TimeUnit.SECONDS, result.timeUnit);
       
        // then with type info
        m = new ObjectMapper();
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        assertEquals(TimeUnit.SECONDS, result.timeUnit);
       
        // then with type info
        m = new ObjectMapper();
        m.enableDefaultTyping();
        json = m.writeValueAsString(bean);
        result = m.readValue(json, TimeUnitBean.class);

        assertEquals(TimeUnit.SECONDS, result.timeUnit);
    }
   
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    {
        ObjectMapper m = new ObjectMapper();
        m.enableDefaultTyping();
       
        // Typing is needed for enums
        String json = m.writeValueAsString(new Object[] { TestEnum.A });
        assertEquals("[[\"com.fasterxml.jackson.databind.jsontype.TestDefaultForEnums$TestEnum\",\"A\"]]", json);

        // and let's verify we get it back ok as well:
        Object[] value = m.readValue(json, Object[].class);
        assertEquals(1, value.length);
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    public void testSimpleEnumsAsField() throws Exception
    {
        ObjectMapper m = new ObjectMapper();
        m.enableDefaultTyping();
        String json = m.writeValueAsString(new EnumHolder(TestEnum.B));
        assertEquals("{\"value\":[\"com.fasterxml.jackson.databind.jsontype.TestDefaultForEnums$TestEnum\",\"B\"]}", json);
        EnumHolder holder = m.readValue(json, EnumHolder.class);
        assertSame(TestEnum.B, holder.value);
    }
}
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     */

    public void testSimpleField() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        String json = mapper.writeValueAsString(new FieldWrapperBean(new StringWrapper("foo")));
//System.out.println("JSON/field+object == "+json);
        FieldWrapperBean bean = mapper.readValue(json, FieldWrapperBean.class);
        assertNotNull(bean.value);
        assertEquals(StringWrapper.class, bean.value.getClass());
        assertEquals(((StringWrapper) bean.value).str, "foo");
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    }

    public void testSimpleMethod() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        String json = mapper.writeValueAsString(new FieldWrapperBean(new IntWrapper(37)));
//System.out.println("JSON/method+object == "+json);
        FieldWrapperBean bean = mapper.readValue(json, FieldWrapperBean.class);
        assertNotNull(bean.value);
        assertEquals(IntWrapper.class, bean.value.getClass());
        assertEquals(((IntWrapper) bean.value).i, 37);
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    public void testSimpleListField() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        FieldWrapperBeanList list = new FieldWrapperBeanList();
        list.add(new FieldWrapperBean(new OtherBean()));
        String json = mapper.writeValueAsString(list);
//System.out.println("JSON/field+list == "+json);
        FieldWrapperBeanList result = mapper.readValue(json, FieldWrapperBeanList.class);
        assertNotNull(result);
        assertEquals(1, result.size());
        FieldWrapperBean bean = list.get(0);
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        ObjectMapper mapper = new ObjectMapper();
        MethodWrapperBeanList list = new MethodWrapperBeanList();
        list.add(new MethodWrapperBean(new BooleanWrapper(true)));
        list.add(new MethodWrapperBean(new StringWrapper("x")));
        list.add(new MethodWrapperBean(new OtherBean()));
        String json = mapper.writeValueAsString(list);
        MethodWrapperBeanList result = mapper.readValue(json, MethodWrapperBeanList.class);
        assertNotNull(result);
        assertEquals(3, result.size());
        MethodWrapperBean bean = result.get(0);
        assertEquals(BooleanWrapper.class, bean.value.getClass());
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