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EclipseLink/DesignDocs/350483
Contents
Bug 350483:Object to JSON Support
JAXB Annotations
- XmlAccessOrder
- XmlAccessorOrder
- XmlAccessorType
- XmlAccessType
- XmlAnyAttribute
- XmlAnyElement
- XmlAttribute
- XmlAttributeRef
- XmlElement
- XmlElementWrapper
- XmlID
- XmlIDREF
- XmlJavaTypeAdapter
- XmlJavaTypeAdapters
- XmlList
- XmlMimeType
- XmlMixed
- XmlNs
- XmlNsForm
- XmlRootElement
- XmlSchema
- XmlSeeAlso
- XmlTransient
- XmlType
- XmlValue
MOXy Annotations
- XmlAccessMethods
- XmlCDATA
- XmlClassExtractor
- XmlContainerPolicy
- XmlCustomizer
- XMLDiscriminatorNode
- XMLDiscriminatorValue
- XmlElementsJoinNodes
- XmlInverseReference
- XmlIsSetNullPolicy
- XmlJoinNode
- XmlJoinNodes
- XmlKey
- XmlMashalNullRepresentation
- XmlNameTransformer
- XmlNullPolicy
- XmlParameter
- XmlPath
- XmlPaths
- XmlProperties
- XmlProperty
- XmlReadOnly
- XmlReadTransformer
- XmlTransformation
- XmlVirtualAccessMethods
- XmlVirtualAccessMethodsSchema
- XmlWriteOnly
- XmlWriteTransformer
- XmlWriteTransformers
Inheritance
XML - <prefix:vehicle xsi:type="prefix:car-type"> JSON-Can unmarshal "type":"prefix:car-type" or "type":"car-type", Should it marshal "type":"prefix:car-type" or "type":"car-type",
Namespaces
By default namespaces/prefixes will be ignored during marshal and unmarshal operations. This default behavior is a problem if there are multiple mappings with the same local name in different namespaces as there would be no way to distinguish between those mappings. Users will be able to provide a Map of namespaces to customize the behavior.
Map namespaces = new HashMap<String, String>(); namespaces.put("ns1", "namespace1"); namespaces.put("ns2", "namespace2"); jsonUnmarshaller.setProperty(JAXBContext.NAMESPACES, namespaces);
If the namespace map is set on the marshaller it will be used to prefix elements during the marshal operation.
jsonMarshaller.setProperty(JAXBContext.USE_NAMESPACES, true);
The namespaces will be give the prefix from the map separated with a `.` ie:
{"ns0.employee:{
"ns0.id":123
}
}
Date Types
XSI type attribute
ie:CompositeObjectMapping to Object.class attributes of type java.lang.Object (or Collection of Objects).
- Equivalent XML -
<responsibilities>
<responsibility xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xsd='http://www.w3.org/2001/XMLSchema' xsi:type="xsd:string">Fix Bugs</responsibility>
no "root element" support
JSON supports documents with no root element
{"area-code":"613",
"number":"1234567"}During marshal if there is no @XmlRootElement specified then the JSON document won't have a root element (as above). During an unmarshal operation if the document has more than one child element it will be treated as an object without a root element. The only unmarshal methods that will be supported for the non root element case will be those that take a Class argument that specifies the class to unmarshal to.