Examples of org.codehaus.jackson.xc.JaxbAnnotationIntrospector

org.codehaus.jackson.xc.JaxbAnnotationIntrospector
Annotation introspector that leverages JAXB annotations where applicable to JSON mapping.
The following JAXB annotations are not supported yet (but some may be supported in future)
- {@link XmlAnyAttribute} not yet used (as of 1.5) but may be in future (as an alias for @JsonAnySetter?)
- {@link XmlAnyElement} not yet used, may be as per [JACKSON-253]
- {@link javax.xml.bind.annotation.XmlAttachmentRef}: JSON does not support external attachments
- {@link XmlElementDecl}
- {@link XmlElementRefs} because Jackson doesn't have any support for 'named' collection items -- however,this may become partially supported as per [JACKSON-253].
- {@link XmlID} because Jackson doesn't support referential integrity. NOTE: this too may be supportedin future if/when id references are handled
- {@link XmlIDREF} same as XmlID
- {@link javax.xml.bind.annotation.XmlInlineBinaryData} since the underlying concepts(like XOP) do not exist in JSON -- Jackson will always use inline base64 encoding as the method
- {@link javax.xml.bind.annotation.XmlList} because JSON does have (or necessarily need)method of serializing list of values as space-separated Strings
- {@link javax.xml.bind.annotation.XmlMimeType}
- {@link javax.xml.bind.annotation.XmlMixed} since JSON has no concept of mixed content
- {@link XmlRegistry}
- {@link XmlRootElement} is recognized and used (as of 1.7) for defining root wrapper name (if used)
- {@link XmlSchema} not used, unlikely to be used
- {@link XmlSchemaType} not used, unlikely to be used
- {@link XmlSchemaTypes} not used, unlikely to be used
- {@link XmlSeeAlso} not needed for anything currently (could theoretically be usefulfor locating subtypes for Polymorphic Type Handling)
Note also the following limitations:
- Any property annotated with {@link XmlValue} will have a property named 'value' on its JSON object.
@author Ryan Heaton @author Tatu Saloranta

    }


    private ObjectMapper getObjectMapper() throws IOException {
        if (this.objectMapper == null) {
            ObjectMapper objectMapper = new ObjectMapper();
            AnnotationIntrospector introspector = new JaxbAnnotationIntrospector();
            SerializationConfig serializationConfig = objectMapper.getSerializationConfig();
            serializationConfig = serializationConfig.without(SerializationConfig.Feature.WRAP_ROOT_VALUE)
                                                     .withAnnotationIntrospector(introspector);
            objectMapper.setSerializationConfig(serializationConfig);
            this.objectMapper = objectMapper;

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    }


    private ObjectMapper getObjectMapper() throws IOException {
        if (this.objectMapper == null) {
            ObjectMapper objectMapper = new ObjectMapper();
            AnnotationIntrospector introspector = new JaxbAnnotationIntrospector();
            SerializationConfig serializationConfig = objectMapper.getSerializationConfig();
            serializationConfig = serializationConfig.without(SerializationConfig.Feature.WRAP_ROOT_VALUE)
                    .with(SerializationConfig.Feature.INDENT_OUTPUT)
                    .withSerializationInclusion(JsonSerialize.Inclusion.NON_NULL)
                    .withSerializationInclusion(JsonSerialize.Inclusion.NON_EMPTY)

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 * 
 */
public class JacksonHelper {
    public static ObjectMapper createObjectMapper() {
        ObjectMapper mapper = new ObjectMapper();
        AnnotationIntrospector primary = new JaxbAnnotationIntrospector();
        AnnotationIntrospector secondary = new JacksonAnnotationIntrospector();
        AnnotationIntrospector pair = new AnnotationIntrospector.Pair(primary, secondary);
        mapper.getDeserializationConfig().setAnnotationIntrospector(pair);
        // [rfeng] To avoid complaints about javaClass
        mapper.getDeserializationConfig().set(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, Boolean.FALSE);

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     */
    public void testWithJAXB() throws Exception
    {
        String jsonData = "{\"id\":1}";
        ObjectMapper mapper = new ObjectMapper();
        mapper.getDeserializationConfig().setAnnotationIntrospector(new JaxbAnnotationIntrospector());
        mapper.readValue(jsonData, JaxbBean.class);


    }

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     */


    public void testAutoDetectDisable() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        mapper.getSerializationConfig().setAnnotationIntrospector(new JaxbAnnotationIntrospector());
        Jackson183Bean bean = new Jackson183Bean();
        Map<String,Object> result;


        // Ok: by default, should see 2 fields:
        result = writeAndMap(mapper, bean);
        assertEquals(2, result.size());
        assertEquals("a", result.get("a"));
        assertEquals("b", result.get("b"));


        // But when disabling auto-detection, just one
        mapper = new ObjectMapper();
        mapper.getSerializationConfig().setAnnotationIntrospector(new JaxbAnnotationIntrospector());
        mapper.configure(SerializationConfig.Feature.AUTO_DETECT_GETTERS, false);
        result = writeAndMap(mapper, bean);
        assertEquals(1, result.size());
        assertNull(result.get("a"));
        assertEquals("b", result.get("b"));

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     */


    public void testDetection() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        mapper.getSerializationConfig().setAnnotationIntrospector(new JaxbAnnotationIntrospector());


        Map<String,Object> result = writeAndMap(mapper, new SimpleBean());
        assertEquals(3, result.size());
        assertEquals("1", result.get("jaxb"));
        assertEquals("2", result.get("jaxb2"));

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     * tests getting serializer/deserializer instances.
     */
    public void testSerializeDeserializeWithJaxbAnnotations() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        mapper.getSerializationConfig().setAnnotationIntrospector(new JaxbAnnotationIntrospector());
        mapper.getDeserializationConfig().setAnnotationIntrospector(new JaxbAnnotationIntrospector());
        mapper.getSerializationConfig().set(SerializationConfig.Feature.INDENT_OUTPUT, true);
        JaxbExample ex = new JaxbExample();
        QName qname = new QName("urn:hi", "hello");
        ex.setQname(qname);
        ex.setAttributeProperty("attributeValue");

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        assertNull(readEx.propertyToIgnore);
    }


    public void testNamespaceAccess() throws Exception
    {
        AnnotationIntrospector ai = new JaxbAnnotationIntrospector();
        assertEquals("urn:class", ai.findNamespace(AnnotatedClass.construct(NamespaceBean.class, ai, null)));
        /* should it return null or empty String? Should be null
         * for no annotations; empty for explicitly empty NS.
         */
        assertNull(ai.findNamespace(AnnotatedClass.construct(SimpleBean.class, ai, null)));
    }

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        assertNull(ai.findNamespace(AnnotatedClass.construct(SimpleBean.class, ai, null)));
    }


    public void testRootNameAccess() throws Exception
    {
        AnnotationIntrospector ai = new JaxbAnnotationIntrospector();
        // If no @XmlRootElement, should get null (unless pkg has etc)
        assertNull(ai.findRootName(AnnotatedClass.construct(SimpleBean.class, ai, null)));
        // With @XmlRootElement, but no name, empty String
        assertEquals("", ai.findRootName(AnnotatedClass.construct(NamespaceBean.class, ai, null)));
        // and otherwise explicit name
        assertEquals("test", ai.findRootName(AnnotatedClass.construct(RootNameBean.class, ai, null)));
    }

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     * cyclic is not a problem (instances are).
     */
    public void testWithJAXB() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        mapper.getDeserializationConfig().setAnnotationIntrospector(new JaxbAnnotationIntrospector());
        Map<String,Object> results = writeAndMap(mapper, new Bean(null, "abx"));
        assertEquals(2, results.size());
        assertEquals("abx", results.get("name"));
        assertTrue(results.containsKey("next"));
        assertNull(results.get("next"));

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