Examples of org.eclipse.persistence.oxm.mappings.XMLChoiceCollectionMapping

Package org.eclipse.persistence.oxm.mappings

Examples of org.eclipse.persistence.oxm.mappings.XMLChoiceCollectionMapping

org.eclipse.persistence.oxm.mappings.XMLChoiceCollectionMapping
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 collection of choice or substitution group elements
The XMLChoiceCollectionMapping is the collection version of the XMLChoiceMapping. This mapping 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 added to the collection.
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);

        XMLDirectMapping sessionFile = new XMLDirectMapping();
        sessionFile.setAttributeName("sessionsFile");
        sessionFile.setXPath("sessions-file/text()");
        descriptor.addMapping(sessionFile);


        XMLChoiceCollectionMapping operationsMapping = new XMLChoiceCollectionMapping();
        operationsMapping.setAttributeName("operations");
        operationsMapping.setAttributeAccessor(new AttributeAccessor() {
            public Object getAttributeValueFromObject(Object object) {
                return ((XRServiceModel)object).getOperationsList();
            }
            public void setAttributeValueInObject(Object object, Object value) {
                Vector v = (Vector)value;
                XRServiceModel dbwsModel = (XRServiceModel)object;
                Map<String, Operation> operations = dbwsModel.getOperations();
                for (Iterator i = v.iterator(); i.hasNext();) {
                    Object obj = i.next();
                    if (obj instanceof Operation) {
                        Operation op = (Operation)obj;
                        operations.put(op.getName(), op);
                    }
                }
            }
          });
        operationsMapping.addChoiceElement("insert", InsertOperation.class);
        operationsMapping.addChoiceElement("query", QueryOperation.class);
        operationsMapping.addChoiceElement("update", UpdateOperation.class);
        operationsMapping.addChoiceElement("delete", DeleteOperation.class);
        operationsMapping.addChoiceElement("batch-sql-query", BatchQueryOperation.class);
        descriptor.addMapping(operationsMapping);
        return descriptor;
    }

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                        this.hasReferenceMappings = true;
                    }
                }
            }
            if(mapping instanceof XMLChoiceCollectionMapping) {
                XMLChoiceCollectionMapping choiceMapping = ((XMLChoiceCollectionMapping)mapping);
                for(XMLMapping next : choiceMapping.getChoiceElementMappings().values()) {
                    if(((DatabaseMapping)next).isObjectReferenceMapping()) {
                        this.hasReferenceMappings = true;
                    }
                }
            }

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                        nodeValue.setNullCapableNodeValue(firstNodeValue);
                        addChild(next.getXPathFragment(), nodeValue, xmlDescriptor.getNamespaceResolver());
                    }
                    continue;
                } else if(xmlMapping instanceof XMLChoiceCollectionMapping) {
                    XMLChoiceCollectionMapping xmlChoiceMapping = (XMLChoiceCollectionMapping)xmlMapping;
                    Iterator fields = xmlChoiceMapping.getChoiceElementMappings().keySet().iterator();
                    XMLField firstField = (XMLField)fields.next();
                    XMLChoiceCollectionMappingUnmarshalNodeValue unmarshalValue = new XMLChoiceCollectionMappingUnmarshalNodeValue(xmlChoiceMapping, firstField);
                    XMLChoiceCollectionMappingMarshalNodeValue marshalValue = new XMLChoiceCollectionMappingMarshalNodeValue(xmlChoiceMapping, firstField);
                    HashMap<XMLField, NodeValue> fieldToNodeValues = new HashMap<XMLField, NodeValue>();
                    unmarshalValue.setContainerNodeValue(unmarshalValue);

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        }
        return mapping;
    }


    public XMLChoiceCollectionMapping generateChoiceCollectionMapping(Property property, XMLDescriptor descriptor, NamespaceInfo namespace) {
        XMLChoiceCollectionMapping mapping = new XMLChoiceCollectionMapping();
        mapping.setReuseContainer(true);
        mapping.setAttributeName(property.getPropertyName());
        // handle read-only set via metadata
        if (property.isSetReadOnly()) {
            mapping.setIsReadOnly(property.isReadOnly());
        }
        // handle write-only set via metadata
        if (property.isSetWriteOnly()) {
            mapping.setIsWriteOnly(property.isWriteOnly());
        }
        if (property.isMethodProperty()) {
            if (property.getGetMethodName() == null) {
                // handle case of set with no get method
                String paramTypeAsString = property.getType().getName();
                mapping.setAttributeAccessor(new JAXBSetMethodAttributeAccessor(paramTypeAsString, helper.getClassLoader()));
                mapping.setIsReadOnly(true);
                mapping.setSetMethodName(property.getSetMethodName());
            } else if (property.getSetMethodName() == null) {
                mapping.setGetMethodName(property.getGetMethodName());
                mapping.setIsWriteOnly(true);
            } else {
                mapping.setSetMethodName(property.getSetMethodName());
                mapping.setGetMethodName(property.getGetMethodName());
            }
        }
        JavaClass collectionType = property.getType();
        if (collectionType.isArray() || areEquals(collectionType, Collection.class) || areEquals(collectionType, List.class)) {
            collectionType = jotArrayList;
        } else if (areEquals(collectionType, Set.class)) {
            collectionType = jotHashSet;
        }
        mapping.useCollectionClassName(collectionType.getRawName());


        boolean isIdRef = property.isXmlIdRef();
        Iterator<Property> choiceProperties = property.getChoiceProperties().iterator();
        while (choiceProperties.hasNext()) {
            Property next = choiceProperties.next();
            JavaClass type = next.getType();
            if (next.getXmlJoinNodes() != null) {
                // handle XmlJoinNodes
                List<XMLField> srcFlds = new ArrayList<XMLField>();
                List<XMLField> tgtFlds = new ArrayList<XMLField>();
                for (XmlJoinNode xmlJoinNode: next.getXmlJoinNodes().getXmlJoinNode()) {
                    srcFlds.add(new XMLField(xmlJoinNode.getXmlPath()));
                    tgtFlds.add(new XMLField(xmlJoinNode.getReferencedXmlPath()));
                }
                mapping.addChoiceElement(srcFlds, type.getQualifiedName(), tgtFlds);
            } else if (isIdRef) {
                // handle IDREF
                String tgtXPath = null;
                TypeInfo referenceType = typeInfo.get(type.getQualifiedName());
                if (null != referenceType && referenceType.isIDSet()) {
                    Property prop = referenceType.getIDProperty();
                    tgtXPath = getXPathForField(prop, namespace, !prop.isAttribute()).getXPath();
                }
                // if the XPath is set (via xml-path) use it, otherwise figure it out
                XMLField srcXPath;
                if (next.getXmlPath() != null) {
                    srcXPath = new XMLField(next.getXmlPath());
                } else {
                    srcXPath = getXPathForField(next, namespace, true);
                }
                mapping.addChoiceElement(srcXPath.getXPath(), type.getQualifiedName(), tgtXPath);
            } else {
                XMLField xpath;
                if (next.getXmlPath() != null) {
                    xpath = new XMLField(next.getXmlPath());
                } else {
                    xpath = getXPathForField(next, namespace, !(this.typeInfo.containsKey(type.getQualifiedName())));
                }
                mapping.addChoiceElement(xpath.getName(), type.getQualifiedName());
            }
        }
        return mapping;
    }

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            XMLAnyCollectionMapping mapping = generateAnyCollectionMapping(property, descriptor, namespaceInfo, true);
            return mapping;
        }
        DatabaseMapping mapping;
        if (isCollection) {
            mapping = new XMLChoiceCollectionMapping();
            ((XMLChoiceCollectionMapping) mapping).setReuseContainer(true);
            JavaClass collectionType = property.getType();
            if (collectionType.isArray() || areEquals(collectionType, Collection.class) || areEquals(collectionType, List.class)) {
                collectionType = jotArrayList;
            } else if (areEquals(collectionType, Set.class)) {
                collectionType = jotHashSet;
            }
            ((XMLChoiceCollectionMapping) mapping).useCollectionClassName(collectionType.getRawName());
            JAXBElementRootConverter jaxbERConverter = new JAXBElementRootConverter(Object.class);
            if (property.isSetXmlJavaTypeAdapter()) {
                JavaClass adapterClass = helper.getJavaClass(property.getXmlJavaTypeAdapter().getValue());
                jaxbERConverter.setNestedConverter(new XMLJavaTypeConverter(adapterClass.getQualifiedName()));
            }
            ((XMLChoiceCollectionMapping) mapping).setConverter(jaxbERConverter);
            if (property.isSetWriteOnly()) {
                ((XMLChoiceCollectionMapping) mapping).setIsWriteOnly(property.isWriteOnly());
            }
        } else {
            mapping = new XMLChoiceObjectMapping();
            JAXBElementRootConverter jaxbERConverter = new JAXBElementRootConverter(Object.class);
            if (property.isSetXmlJavaTypeAdapter()) {
                JavaClass adapterClass = helper.getJavaClass(property.getXmlJavaTypeAdapter().getValue());
                jaxbERConverter.setNestedConverter(new XMLJavaTypeConverter(adapterClass.getQualifiedName()));
            }
            ((XMLChoiceObjectMapping) mapping).setConverter(jaxbERConverter);
            if (property.isSetWriteOnly()) {
                ((XMLChoiceObjectMapping) mapping).setIsWriteOnly(property.isWriteOnly());
            }
        }
        if (property.isSetReadOnly()) {
            mapping.setIsReadOnly(property.isReadOnly());
        }
        mapping.setAttributeName(property.getPropertyName());
        if (property.isMethodProperty()) {
            if (property.getGetMethodName() == null) {
                // handle case of set with no get method
                String paramTypeAsString = property.getType().getName();
                mapping.setAttributeAccessor(new JAXBSetMethodAttributeAccessor(paramTypeAsString, helper.getClassLoader()));
                mapping.setIsReadOnly(true);
                mapping.setSetMethodName(property.getSetMethodName());
            } else if (property.getSetMethodName() == null) {
                mapping.setGetMethodName(property.getGetMethodName());
                ((XMLMapping)mapping).setIsWriteOnly(true);
            } else {
                mapping.setSetMethodName(property.getSetMethodName());
                mapping.setGetMethodName(property.getGetMethodName());
            }
        }


        List<ElementDeclaration> referencedElements = property.getReferencedElements();
        JavaClass propertyType = property.getType();
        if (propertyType.isArray()) {
            JAXBArrayAttributeAccessor accessor = new JAXBArrayAttributeAccessor(mapping.getAttributeAccessor(), mapping.getContainerPolicy(), helper.getClassLoader());
            accessor.setComponentClassName(property.getType().getComponentType().getName());
            JavaClass componentType = propertyType.getComponentType();
            if(componentType.isArray()) {
                Class adaptedClass = classToGeneratedClasses.get(componentType.getName());
                accessor.setAdaptedClassName(adaptedClass.getName());
            }
            mapping.setAttributeAccessor(accessor);
        }
        for (ElementDeclaration element:referencedElements) {
            QName elementName = element.getElementName();
            JavaClass pType = element.getJavaType();
            boolean isBinaryType = (areEquals(pType, AnnotationsProcessor.JAVAX_ACTIVATION_DATAHANDLER) || areEquals(pType, byte[].class) || areEquals(pType, Byte[].class) || areEquals(pType, Image.class) || areEquals(pType, Source.class) || areEquals(pType, AnnotationsProcessor.JAVAX_MAIL_INTERNET_MIMEMULTIPART));        
            boolean isText = !isBinaryType && !(this.typeInfo.containsKey(element.getJavaTypeName())) && !(element.getJavaTypeName().equals(OBJECT_CLASS_NAME));
            String xPath = "";


            // handle XmlElementWrapper
            if (property.isSetXmlElementWrapper()) {
                XmlElementWrapper wrapper = property.getXmlElementWrapper();
                String namespace = wrapper.getNamespace();
                if (namespace.equals("##default")) {
                    if (namespaceInfo.isElementFormQualified()) {
                        namespace = namespaceInfo.getNamespace();
                    } else {
                        namespace = "";
                    }
                }
                if (namespace.equals("")) {
                    xPath += (wrapper.getName() + "/");
                } else {
                    String prefix = getPrefixForNamespace(namespace, namespaceInfo.getNamespaceResolver(), null);
                    xPath += getQualifiedString(prefix, wrapper.getName() + "/");
                }
            }
            XMLField xmlField = this.getXPathForElement(xPath, elementName, namespaceInfo, isText);
            //ensure byte[] goes to base64 instead of the default hex.
            if(helper.getXMLToJavaTypeMap().get(element.getJavaType().getRawName()) == XMLConstants.BASE_64_BINARY_QNAME) {
                xmlField.setSchemaType(XMLConstants.BASE_64_BINARY_QNAME);
            }
            DatabaseMapping nestedMapping;
            if(isCollection){
                XMLChoiceCollectionMapping xmlChoiceCollectionMapping = (XMLChoiceCollectionMapping) mapping;
                xmlChoiceCollectionMapping.addChoiceElement(xmlField, element.getJavaTypeName());
                nestedMapping = (DatabaseMapping) xmlChoiceCollectionMapping.getChoiceElementMappings().get(xmlField);
                if(nestedMapping.isAbstractCompositeCollectionMapping()){
                    ((XMLCompositeCollectionMapping)nestedMapping).setKeepAsElementPolicy(UnmarshalKeepAsElementPolicy.KEEP_UNKNOWN_AS_ELEMENT);
                }


                if (nestedMapping.isAbstractCompositeDirectCollectionMapping()) {
                    ((XMLCompositeDirectCollectionMapping) nestedMapping).getNullPolicy().setNullRepresentedByEmptyNode(false);
                }


                if (element.isList() && nestedMapping.isAbstractCompositeDirectCollectionMapping()) {
                    XMLListConverter listConverter = new XMLListConverter();
                    listConverter.setObjectClassName(element.getJavaType().getQualifiedName());
                    ((XMLCompositeDirectCollectionMapping)nestedMapping).setValueConverter(listConverter);
                }
            } else {
                XMLChoiceObjectMapping xmlChoiceObjectMapping = (XMLChoiceObjectMapping) mapping;
                xmlChoiceObjectMapping.addChoiceElement(xmlField, element.getJavaTypeName());
                nestedMapping = (DatabaseMapping) xmlChoiceObjectMapping.getChoiceElementMappings().get(xmlField);
                if(nestedMapping.isAbstractCompositeObjectMapping()){
                    ((XMLCompositeObjectMapping)nestedMapping).setKeepAsElementPolicy(UnmarshalKeepAsElementPolicy.KEEP_UNKNOWN_AS_ELEMENT);
                }
            }


            if (!element.isXmlRootElement()) {
                Class scopeClass = element.getScopeClass();
                if (scopeClass == javax.xml.bind.annotation.XmlElementDecl.GLOBAL.class){
                    scopeClass = JAXBElement.GlobalScope.class;
                }
                Class declaredType = helper.getClassForJavaClass(element.getJavaType());
                JAXBElementConverter converter = new JAXBElementConverter(xmlField, declaredType, scopeClass);
                if (isCollection){
                    XMLChoiceCollectionMapping xmlChoiceCollectionMapping = (XMLChoiceCollectionMapping) mapping;
                    Converter originalConverter = xmlChoiceCollectionMapping.getConverter(xmlField);
                    converter.setNestedConverter(originalConverter);
                    xmlChoiceCollectionMapping.addConverter(xmlField, converter);
                } else {
                    XMLChoiceObjectMapping xmlChoiceObjectMapping = (XMLChoiceObjectMapping) mapping;
                    Converter originalConverter = xmlChoiceObjectMapping.getConverter(xmlField);
                    converter.setNestedConverter(originalConverter);
                    xmlChoiceObjectMapping.addConverter(xmlField, converter);

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        }
        return mapping;
    }
    
    private DatabaseMapping buildXMLChoiceCollectionMapping(String mappingUri) {
        XMLChoiceCollectionMapping mapping = new XMLChoiceCollectionMapping();
        mapping.setAttributeName(getName());
        mapping.useCollectionClass(ListWrapper.class);
        //First add XPath for this property
        String xPath = getQualifiedXPath(mappingUri, getType().isDataType());
        mapping.addChoiceElement(xPath, getType().getImplClass());
        //For each substitutable property, create the xpath and add it.
        Iterator<SDOProperty> properties = this.getSubstitutableElements().iterator();
        while(properties.hasNext()) {
            SDOProperty nextProp = properties.next();
            xPath = nextProp.getQualifiedXPath(mappingUri, nextProp.getType().isDataType(), getContainingType());
            mapping.addChoiceElement(xPath, nextProp.getType().getImplClass());
        }
        return mapping;
    }

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                        this.hasReferenceMappings = true;
                    }
                }
            }
            if(mapping instanceof XMLChoiceCollectionMapping) {
                XMLChoiceCollectionMapping choiceMapping = ((XMLChoiceCollectionMapping)mapping);
                for(XMLMapping next : choiceMapping.getChoiceElementMappings().values()) {
                    if(((DatabaseMapping)next).isObjectReferenceMapping()) {
                        this.hasReferenceMappings = true;
                    }
                }
            }

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                    xmlChoiceMapping.addChoiceElement(attributeName, Link.class);
                    xmlChoiceMapping.setConverter(new XMLJavaTypeConverter(Class.forName(adapterClassName, true, cl)));
                    jaxbDescriptor.removeMappingForAttributeName(jaxbMapping.getAttributeName());
                    jaxbDescriptor.addMapping(xmlChoiceMapping);
                } else if (jaxbMapping.isAbstractCompositeCollectionMapping()) {
                    XMLChoiceCollectionMapping xmlChoiceMapping = new XMLChoiceCollectionMapping();
                    xmlChoiceMapping.setAttributeName(attributeName);
                    copyAccessorToMapping(jaxbMapping, xmlChoiceMapping);
                    xmlChoiceMapping.setProperties(jaxbMapping.getProperties());
                    xmlChoiceMapping.addChoiceElement(attributeName, Link.class);
                    xmlChoiceMapping.addChoiceElement(attributeName, jpaMapping.getReferenceDescriptor().getJavaClass());
                    xmlChoiceMapping.setConverter(new XMLJavaTypeConverter(Class.forName(adapterClassName, true, cl)));
                    jaxbDescriptor.removeMappingForAttributeName(jaxbMapping.getAttributeName());
                    jaxbDescriptor.addMapping(xmlChoiceMapping);
                }
            } catch (ClassNotFoundException e) {
                throw new JPARSException(e.toString());

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        XMLDirectMapping sessionFile = new XMLDirectMapping();
        sessionFile.setAttributeName("sessionsFile");
        sessionFile.setXPath("sessions-file/text()");
        descriptor.addMapping(sessionFile);


        XMLChoiceCollectionMapping operationsMapping = new XMLChoiceCollectionMapping();
        operationsMapping.setAttributeName("operations");
        operationsMapping.setAttributeAccessor(new AttributeAccessor() {
            public Object getAttributeValueFromObject(Object object) {
                return ((XRServiceModel)object).getOperationsList();
            }
            public void setAttributeValueInObject(Object object, Object value) {
                Vector v = (Vector)value;
                XRServiceModel dbwsModel = (XRServiceModel)object;
                Map<String, Operation> operations = dbwsModel.getOperations();
                for (Iterator i = v.iterator(); i.hasNext();) {
                    Object obj = i.next();
                    if (obj instanceof Operation) {
                        Operation op = (Operation)obj;
                        operations.put(op.getName(), op);
                    }
                }
            }
          });
        operationsMapping.addChoiceElement("insert", InsertOperation.class);
        operationsMapping.addChoiceElement("query", QueryOperation.class);
        operationsMapping.addChoiceElement("update", UpdateOperation.class);
        operationsMapping.addChoiceElement("delete", DeleteOperation.class);
        operationsMapping.addChoiceElement("batch-sql-query", BatchQueryOperation.class);
        descriptor.addMapping(operationsMapping);
        return descriptor;
    }

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        }
        return mapping;
    }


    public XMLChoiceCollectionMapping generateChoiceCollectionMapping(Property property, XMLDescriptor descriptor, NamespaceInfo namespace) {
        XMLChoiceCollectionMapping mapping = new XMLChoiceCollectionMapping();
        initializeXMLContainerMapping(mapping);
        mapping.setAttributeName(property.getPropertyName());
        // handle read-only set via metadata
        if (property.isSetReadOnly()) {
            mapping.setIsReadOnly(property.isReadOnly());
        }
        // handle write-only set via metadata
        if (property.isSetWriteOnly()) {
            mapping.setIsWriteOnly(property.isWriteOnly());
        }
        if (property.isMethodProperty()) {
            if (property.getGetMethodName() == null) {
                // handle case of set with no get method
                String paramTypeAsString = property.getType().getName();
                mapping.setAttributeAccessor(new JAXBSetMethodAttributeAccessor(paramTypeAsString, helper.getClassLoader()));
                mapping.setIsReadOnly(true);
                mapping.setSetMethodName(property.getSetMethodName());
            } else if (property.getSetMethodName() == null) {
                mapping.setGetMethodName(property.getGetMethodName());
                mapping.setIsWriteOnly(true);
            } else {
                mapping.setSetMethodName(property.getSetMethodName());
                mapping.setGetMethodName(property.getGetMethodName());
            }
        }
        JavaClass collectionType = property.getType();
        collectionType = containerClassImpl(collectionType);
        mapping.useCollectionClassName(collectionType.getRawName());


        if (property.isSetXmlElementWrapper()) {
            mapping.setWrapperNullPolicy(getWrapperNullPolicyFromProperty(property));
        }


        boolean isIdRef = property.isXmlIdRef();
        Iterator<Property> choiceProperties = property.getChoiceProperties().iterator();
        while (choiceProperties.hasNext()) {
            Property next = choiceProperties.next();
            JavaClass type = next.getType();
            JavaClass originalType = next.getType();
            Converter converter = null;
            XMLField xmlField = null;
            TypeInfo info = typeInfo.get(type.getName());
            if(info != null){
                XmlJavaTypeAdapter adapter = info.getXmlJavaTypeAdapter();
                if(adapter != null){
                    String adapterValue = adapter.getValue();
                    JavaClass adapterClass = helper.getJavaClass(adapterValue);
                    JavaClass theClass = CompilerHelper.getTypeFromAdapterClass(adapterClass, helper);
                    type = theClass;
                    converter = new XMLJavaTypeConverter(adapterClass.getQualifiedName());
                }
            }
            
            if (next.getXmlJoinNodes() != null) {
                // handle XmlJoinNodes
                List<XMLField> srcFlds = new ArrayList<XMLField>();
                List<XMLField> tgtFlds = new ArrayList<XMLField>();
                for (XmlJoinNode xmlJoinNode: next.getXmlJoinNodes().getXmlJoinNode()) {
                    srcFlds.add(new XMLField(xmlJoinNode.getXmlPath()));
                    tgtFlds.add(new XMLField(xmlJoinNode.getReferencedXmlPath()));
                }
                mapping.addChoiceElement(srcFlds, type.getQualifiedName(), tgtFlds);
            } else if (isIdRef) {
                // handle IDREF
                String tgtXPath = null;
                TypeInfo referenceType = typeInfo.get(type.getQualifiedName());
                if (null != referenceType && referenceType.isIDSet()) {
                    Property prop = referenceType.getIDProperty();
                    tgtXPath = getXPathForField(prop, namespace, !prop.isAttribute()).getXPath();
                }
                // if the XPath is set (via xml-path) use it, otherwise figure it out
                XMLField srcXPath;
                if (next.getXmlPath() != null) {
                    srcXPath = new XMLField(next.getXmlPath());
                } else {
                    srcXPath = getXPathForField(next, namespace, true);
                }
                mapping.addChoiceElement(srcXPath.getXPath(), type.getQualifiedName(), tgtXPath);
            } else {
                XMLField xpath;
                if (next.getXmlPath() != null) {
                    xpath = new XMLField(next.getXmlPath());
                } else {
                    xpath = getXPathForField(next, namespace, (!(this.typeInfo.containsKey(type.getQualifiedName()))) || type.isEnum());
                }
                xmlField = xpath;
                mapping.addChoiceElement(xpath.getName(), type.getQualifiedName());
                if(!originalType.getQualifiedName().equals(type.getQualifiedName())) {
                    if(mapping.getClassNameToFieldMappings().get(originalType.getQualifiedName()) == null) {
                        mapping.getClassNameToFieldMappings().put(originalType.getQualifiedName(), xpath);
                    }
                    mapping.addConverter(xpath, converter);
                }
                
            }
                        
            if(xmlField !=null){
                DatabaseMapping nestedMapping = (DatabaseMapping) mapping.getChoiceElementMappings().get(xmlField);
                if(nestedMapping.isAbstractCompositeCollectionMapping()){                   
                   // handle null policy set via xml metadata
                   if (property.isSetNullPolicy()) {
                     ((XMLCompositeCollectionMapping)nestedMapping).setNullPolicy(getNullPolicyFromProperty(property, namespace.getNamespaceResolverForDescriptor()));
                   } else if (property.isNillable()){

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