Module eclipselink
Package org.eclipse.persistence.oxm.mappings

Class XMLChoiceObjectMapping

  • All Implemented Interfaces:
    Serializable, Cloneable, org.eclipse.persistence.internal.oxm.mappings.ChoiceObjectMapping<AttributeAccessor,​org.eclipse.persistence.internal.sessions.AbstractSession,​org.eclipse.persistence.internal.queries.ContainerPolicy,​Converter,​ClassDescriptor,​org.eclipse.persistence.internal.helper.DatabaseField,​XMLMarshaller,​Session,​XMLUnmarshaller,​XMLField,​XMLMapping,​XMLRecord>, org.eclipse.persistence.internal.oxm.mappings.Mapping<org.eclipse.persistence.internal.sessions.AbstractSession,​AttributeAccessor,​org.eclipse.persistence.internal.queries.ContainerPolicy,​ClassDescriptor,​org.eclipse.persistence.internal.helper.DatabaseField,​XMLRecord>, org.eclipse.persistence.internal.oxm.mappings.XMLConverterMapping<XMLMarshaller,​Session,​XMLUnmarshaller>, XMLMapping
    public class XMLChoiceObjectMapping
extends DatabaseMapping
implements org.eclipse.persistence.internal.oxm.mappings.ChoiceObjectMapping<AttributeAccessor,​org.eclipse.persistence.internal.sessions.AbstractSession,​org.eclipse.persistence.internal.queries.ContainerPolicy,​Converter,​ClassDescriptor,​org.eclipse.persistence.internal.helper.DatabaseField,​XMLMarshaller,​Session,​XMLUnmarshaller,​XMLField,​XMLMapping,​XMLRecord>, XMLMapping
    PUBLIC:

    Purpose:Provide a mapping that can map a single attribute to a number of different elements in an XML Document. This will be used to map to Choices or Substitution Groups in an XML Schema

    Responsibilities:

    • Allow the user to specify XPath -> Type mappings
    • Handle reading and writing of XML Documents containing a single choice or substitution group element

    The XMLChoiceMapping allows the user to specify a number of different xpaths, and types associated with those xpaths. When any of these elements are encountered in the XML Document, they are read in as the correct type and set in the object.

    Setting up XPath mappings:Unlike other OXM Mappings, instead of setting a single xpath, the addChoiceElement method is used to specify an xpath and the type associated with this xpath.
    xmlChoiceCollectionMapping.addChoiceElement("mystring/text()", String.class);
    xmlChoiceCollectionMapping.addChoiceElement("myaddress", Address.class);

    See Also:
    Serialized Form

    • Constructor Detail

      • XMLChoiceObjectMapping

        public XMLChoiceObjectMapping()

    • Method Detail

      • getConverter

        public Converter getConverter()
        Return the converter on the mapping. A converter can be used to convert between the object's value and database value of the attribute.
        Specified by:
        getConverter in interface org.eclipse.persistence.internal.oxm.mappings.ChoiceObjectMapping<AttributeAccessor,​org.eclipse.persistence.internal.sessions.AbstractSession,​org.eclipse.persistence.internal.queries.ContainerPolicy,​Converter,​ClassDescriptor,​org.eclipse.persistence.internal.helper.DatabaseField,​XMLMarshaller,​Session,​XMLUnmarshaller,​XMLField,​XMLMapping,​XMLRecord>

      • setConverter

        public void setConverter​(Converter converter)
        Set the converter on the mapping. A converter can be used to convert between the object's value and database value of the attribute.
        Specified by:
        setConverter in interface org.eclipse.persistence.internal.oxm.mappings.ChoiceObjectMapping<AttributeAccessor,​org.eclipse.persistence.internal.sessions.AbstractSession,​org.eclipse.persistence.internal.queries.ContainerPolicy,​Converter,​ClassDescriptor,​org.eclipse.persistence.internal.helper.DatabaseField,​XMLMarshaller,​Session,​XMLUnmarshaller,​XMLField,​XMLMapping,​XMLRecord>

      • buildBackupClone

        public void buildBackupClone​(Object clone,
                             Object backup,
                             org.eclipse.persistence.internal.sessions.UnitOfWorkImpl unitOfWork)
        INTERNAL: Clone the attribute from the clone and assign it to the backup.
        Specified by:
        buildBackupClone in class DatabaseMapping
        Parameters:
        clone - TODO
        backup - TODO
        unitOfWork - TODO

      • buildClone

        public void buildClone​(Object original,
                       org.eclipse.persistence.internal.identitymaps.CacheKey cacheKey,
                       Object clone,
                       Integer refreshCascade,
                       org.eclipse.persistence.internal.sessions.AbstractSession cloningSession)
        INTERNAL: Clone the attribute from the original and assign it to the clone.
        Specified by:
        buildClone in class DatabaseMapping
        Parameters:
        original - TODO
        cacheKey - TODO
        clone - TODO
        refreshCascade - TODO
        cloningSession - TODO

      • buildCloneFromRow

        public void buildCloneFromRow​(org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow,
                              org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager,
                              Object clone,
                              org.eclipse.persistence.internal.identitymaps.CacheKey sharedCacheKey,
                              ObjectBuildingQuery sourceQuery,
                              org.eclipse.persistence.internal.sessions.UnitOfWorkImpl unitOfWork,
                              org.eclipse.persistence.internal.sessions.AbstractSession executionSession)
        Description copied from class: DatabaseMapping
        INTERNAL: A combination of readFromRowIntoObject and buildClone.

        buildClone assumes the attribute value exists on the original and can simply be copied.

        readFromRowIntoObject assumes that one is building an original.

        Both of the above assumptions are false in this method, and actually attempts to do both at the same time.

        Extract value from the row and set the attribute to this value in the working copy clone. In order to bypass the shared cache when in transaction a UnitOfWork must be able to populate working copies directly from the row.

        Specified by:
        buildCloneFromRow in class DatabaseMapping
        Parameters:
        databaseRow - TODO
        joinManager - TODO
        clone - TODO
        sharedCacheKey - TODO
        sourceQuery - TODO
        unitOfWork - TODO
        executionSession - TODO

      • cascadePerformRemoveIfRequired

        public void cascadePerformRemoveIfRequired​(Object object,
                                           org.eclipse.persistence.internal.sessions.UnitOfWorkImpl uow,
                                           Map visitedObjects)
        INTERNAL: Cascade perform delete through mappings that require the cascade
        Specified by:
        cascadePerformRemoveIfRequired in class DatabaseMapping
        Parameters:
        object - TODO
        uow - TODO
        visitedObjects - TODO

      • cascadeRegisterNewIfRequired

        public void cascadeRegisterNewIfRequired​(Object object,
                                         org.eclipse.persistence.internal.sessions.UnitOfWorkImpl uow,
                                         Map visitedObjects)
        INTERNAL: Cascade registerNew for Create through mappings that require the cascade
        Specified by:
        cascadeRegisterNewIfRequired in class DatabaseMapping
        Parameters:
        object - TODO
        uow - TODO
        visitedObjects - TODO

      • compareForChange

        public org.eclipse.persistence.internal.sessions.ChangeRecord compareForChange​(Object clone,
                                                                               Object backup,
                                                                               org.eclipse.persistence.internal.sessions.ObjectChangeSet owner,
                                                                               org.eclipse.persistence.internal.sessions.AbstractSession session)
        INTERNAL: This method was created in VisualAge.
        Specified by:
        compareForChange in class DatabaseMapping
        Parameters:
        clone - TODO
        backup - TODO
        owner - TODO
        session - TODO
        Returns:
        prototype.changeset.ChangeRecord

      • compareObjects

        public boolean compareObjects​(Object firstObject,
                              Object secondObject,
                              org.eclipse.persistence.internal.sessions.AbstractSession session)
        INTERNAL: Compare the attributes belonging to this mapping for the objects.
        Specified by:
        compareObjects in class DatabaseMapping
        Parameters:
        firstObject - TODO
        secondObject - TODO
        session - TODO
        Returns:
        TODO

      • fixObjectReferences

        public void fixObjectReferences​(Object object,
                                Map<Object,​org.eclipse.persistence.internal.sessions.remote.ObjectDescriptor> objectDescriptors,
                                Map<Object,​Object> processedObjects,
                                ObjectLevelReadQuery query,
                                DistributedSession session)
        INTERNAL: An object has been serialized from the server to the client. Replace the transient attributes of the remote value holders with client-side objects.
        Specified by:
        fixObjectReferences in class DatabaseMapping
        Parameters:
        object - TODO
        objectDescriptors - TODO
        processedObjects - TODO
        query - TODO
        session - TODO

      • getFieldValue

        public Object getFieldValue​(Object object,
                            org.eclipse.persistence.internal.core.sessions.CoreAbstractSession session,
                            org.eclipse.persistence.internal.oxm.record.AbstractMarshalRecord record)
        INTERNAL:
        Specified by:
        getFieldValue in interface org.eclipse.persistence.internal.oxm.mappings.ChoiceObjectMapping<AttributeAccessor,​org.eclipse.persistence.internal.sessions.AbstractSession,​org.eclipse.persistence.internal.queries.ContainerPolicy,​Converter,​ClassDescriptor,​org.eclipse.persistence.internal.helper.DatabaseField,​XMLMarshaller,​Session,​XMLUnmarshaller,​XMLField,​XMLMapping,​XMLRecord>

      • iterate

        public void iterate​(org.eclipse.persistence.internal.descriptors.DescriptorIterator iterator)
        INTERNAL: Iterate on the appropriate attribute value.
        Specified by:
        iterate in class DatabaseMapping

      • mergeChangesIntoObject

        public void mergeChangesIntoObject​(Object target,
                                   org.eclipse.persistence.internal.sessions.ChangeRecord changeRecord,
                                   Object source,
                                   org.eclipse.persistence.internal.sessions.MergeManager mergeManager,
                                   org.eclipse.persistence.internal.sessions.AbstractSession targetSession)
        INTERNAL: Merge changes from the source to the target object.
        Specified by:
        mergeChangesIntoObject in class DatabaseMapping

      • mergeIntoObject

        public void mergeIntoObject​(Object target,
                            boolean isTargetUninitialized,
                            Object source,
                            org.eclipse.persistence.internal.sessions.MergeManager mergeManager,
                            org.eclipse.persistence.internal.sessions.AbstractSession targetSession)
        INTERNAL: Merge changes from the source to the target object.
        Specified by:
        mergeIntoObject in class DatabaseMapping

      • valueFromRow

        public Object valueFromRow​(org.eclipse.persistence.internal.sessions.AbstractRecord row,
                           org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager,
                           ObjectBuildingQuery sourceQuery,
                           org.eclipse.persistence.internal.identitymaps.CacheKey cacheKey,
                           org.eclipse.persistence.internal.sessions.AbstractSession executionSession,
                           boolean isTargetProtected,
                           Boolean[] wasCacheUsed)
                    throws DatabaseException
        Description copied from class: DatabaseMapping
        INTERNAL: A subclass should implement this method if it wants different behavior. Returns the value for the mapping from the database row. The execution session is the session the query was executed on, and its platform should be used for data conversion.
        Overrides:
        valueFromRow in class DatabaseMapping
        Throws:
        DatabaseException

      • writeSingleValue

        public void writeSingleValue​(Object value,
                             Object parent,
                             XMLRecord row,
                             org.eclipse.persistence.internal.sessions.AbstractSession session)
        Description copied from interface: XMLMapping
        INTERNAL: A method that marshals a single value to the provided Record based on this mapping's XPath. Used for Sequenced marshalling.
        Specified by:
        writeSingleValue in interface org.eclipse.persistence.internal.oxm.mappings.Mapping<org.eclipse.persistence.internal.sessions.AbstractSession,​AttributeAccessor,​org.eclipse.persistence.internal.queries.ContainerPolicy,​ClassDescriptor,​org.eclipse.persistence.internal.helper.DatabaseField,​XMLRecord>
        Specified by:
        writeSingleValue in interface XMLMapping
        Parameters:
        value - - The value to be marshalled
        row - - The Record the value is being marshalled too.

      • readFromRowIntoObject

        public Object readFromRowIntoObject​(org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow,
                                    org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager,
                                    Object targetObject,
                                    org.eclipse.persistence.internal.identitymaps.CacheKey parentCacheKey,
                                    ObjectBuildingQuery sourceQuery,
                                    org.eclipse.persistence.internal.sessions.AbstractSession executionSession,
                                    boolean isTargetProtected)
                             throws DatabaseException
        Description copied from class: DatabaseMapping
        INTERNAL: Extract value from the row and set the attribute to this value in the object. return value as this value will have been converted to the appropriate type for the object.
        Overrides:
        readFromRowIntoObject in class DatabaseMapping
        Throws:
        DatabaseException

      • isXMLMapping

        public boolean isXMLMapping()
        Description copied from class: DatabaseMapping
        INTERNAL: All relational mappings should implement this method to return true.
        Overrides:
        isXMLMapping in class DatabaseMapping

      • collectFields

        protected Vector<org.eclipse.persistence.internal.helper.DatabaseField> collectFields()
        Description copied from class: DatabaseMapping
        This method must be overwritten in the subclasses to return a vector of all the fields this mapping represents.
        Overrides:
        collectFields in class DatabaseMapping
        Returns:
        TODO

      • addChoiceElement

        public void addChoiceElement​(String xpath,
                             Class<?> elementType)

      • addChoiceElement

        public void addChoiceElement​(String srcXPath,
                             Class<?> elementType,
                             String tgtXPath)

      • addChoiceElement

        public void addChoiceElement​(String xpath,
                             String elementTypeName,
                             boolean xmlRoot)

      • addChoiceElement

        public void addChoiceElement​(String xpath,
                             String elementTypeName)

      • addChoiceElement

        public void addChoiceElement​(XMLField xmlField,
                             Class<?> elementType)

      • addChoiceElement

        public void addChoiceElement​(XMLField sourceField,
                             Class<?> elementType,
                             XMLField targetField)

      • addChoiceElement

        public void addChoiceElement​(XMLField sourceField,
                             String elementTypeName,
                             XMLField targetField)

      • convertClassNamesToClasses

        public void convertClassNamesToClasses​(ClassLoader classLoader)
        Description copied from class: DatabaseMapping
        INTERNAL: Convert all the class-name-based settings in this mapping to actual class-based settings This method is implemented by subclasses as necessary.
        Specified by:
        convertClassNamesToClasses in interface org.eclipse.persistence.internal.oxm.mappings.Mapping<org.eclipse.persistence.internal.sessions.AbstractSession,​AttributeAccessor,​org.eclipse.persistence.internal.queries.ContainerPolicy,​ClassDescriptor,​org.eclipse.persistence.internal.helper.DatabaseField,​XMLRecord>
        Specified by:
        convertClassNamesToClasses in interface XMLMapping
        Overrides:
        convertClassNamesToClasses in class DatabaseMapping
        Parameters:
        classLoader - TODO

      • setChoiceFieldToClassAssociations

        public void setChoiceFieldToClassAssociations​(ArrayList associations)

      • setChoiceElementMappingsByClass

        public void setChoiceElementMappingsByClass​(Map<Class<?>,​XMLMapping> choiceElementMappingsByClass)

      • convertObjectValueToDataValue

        public Object convertObjectValueToDataValue​(Object value,
                                            Session session,
                                            XMLMarshaller marshaller)
        INTERNAL
        Specified by:
        convertObjectValueToDataValue in interface org.eclipse.persistence.internal.oxm.mappings.XMLConverterMapping<XMLMarshaller,​Session,​XMLUnmarshaller>
        Since:
        EclipseLink 2.5.0

      • convertDataValueToObjectValue

        public Object convertDataValueToObjectValue​(Object fieldValue,
                                            Session session,
                                            XMLUnmarshaller unmarshaller)
        INTERNAL
        Specified by:
        convertDataValueToObjectValue in interface org.eclipse.persistence.internal.oxm.mappings.XMLConverterMapping<XMLMarshaller,​Session,​XMLUnmarshaller>
        Since:
        EclipseLink 2.5.0