Package com.fasterxml.jackson.databind

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

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    public void testSimpleDeserialization() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        mapper.registerSubtypes(ValueBean.class);
        ExternalBean result = mapper.readValue("{\"bean\":{\"value\":11},\"extType\":\"vbean\"}", ExternalBean.class);
        assertNotNull(result);
        assertNotNull(result.bean);
        ValueBean vb = (ValueBean) result.bean;
        assertEquals(11, vb.value);
    }
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    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);
        assertEquals(3, ((ValueBean)result.value1).value);
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    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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        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();
        m.enableDefaultTyping();
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        // then with type info
        m = new ObjectMapper();
        m.enableDefaultTyping();
        json = m.writeValueAsString(bean);
        result = m.readValue(json, TimeUnitBean.class);

        assertEquals(TimeUnit.SECONDS, result.timeUnit);
    }
   
    public void testSimpleEnumsInObjectArray() throws Exception
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        // 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);
        assertSame(TestEnum.A, value[0]);
    }

    public void testSimpleEnumsAsField() throws Exception
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    {
        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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    // [Databind#148]
    public void testBadTypeAsNull() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        mapper.disable(DeserializationFeature.FAIL_ON_INVALID_SUBTYPE);
        Object ob = mapper.readValue("{}", MysteryPolymorphic.class);
        assertNull(ob);
        ob = mapper.readValue("{ \"whatever\":13}", MysteryPolymorphic.class);
        assertNull(ob);
    }
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    {
        ObjectMapper mapper = new ObjectMapper();
        mapper.disable(DeserializationFeature.FAIL_ON_INVALID_SUBTYPE);
        Object ob = mapper.readValue("{}", MysteryPolymorphic.class);
        assertNull(ob);
        ob = mapper.readValue("{ \"whatever\":13}", MysteryPolymorphic.class);
        assertNull(ob);
    }

    // [Databind#511]
    public void testInvalidTypeId511() throws Exception {
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                DeserializationFeature.FAIL_ON_INVALID_SUBTYPE,
                DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES,
                DeserializationFeature.FAIL_ON_IGNORED_PROPERTIES
        );
        String json = "{\"many\":[{\"sub1\":{\"a\":\"foo\"}},{\"sub2\":{\"b\":\"bar\"}}]}" ;
        Good goodResult = mapper.readValue(json, Good.class) ;
        assertNotNull(goodResult) ;
        Bad badResult = mapper.readValue(json, Bad.class);
        assertNotNull(badResult);
    }
}
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