Examples of org.eclipse.persistence.oxm.mappings.nullpolicy.AbstractNullPolicy

Package org.eclipse.persistence.oxm.mappings.nullpolicy

Examples of org.eclipse.persistence.oxm.mappings.nullpolicy.AbstractNullPolicy

org.eclipse.persistence.oxm.mappings.nullpolicy.AbstractNullPolicy

PUBLIC: Description: This node null policy allows for the handling of various representations of null in XML documents.

Null policies have 2 concrete implementations:

NullPolicy (default implementation)
IsSetNullPolicy (keyed off isSet() state of the node)

Unmarshal Flag	Description
isSetPerformedForAbsentNode	This umarshal flag represents whether a set is done for absent nodes only.
isNullRepresentedByEmptyNode	If this unmarshal flag is false for empty nodes we set an empty Object for composite mappings, otherwise we set to null.
isNullRepresentedByXsiNil	If this unmarshal flag is false for xsi:nil nodes we ignore the xsi:nil attribute and treat as an empty node. Otherwise we set to null.

Marshal Enum	XMLNullRepresentationType Description
XSI_NIL	Nillable: Write out an xsi:nil="true" attribute.
ABSENT_NODE(default)	Optional: Write out no node.
EMPTY_NODE	Required: Write out an empty or node="" node.

Usage:
@see org.eclipse.persistence.internal.oxm.NullCapableValue @since Oracle TopLink 11g Release 1 (11.1.1)

    }


  @Override
  public boolean marshalSingleValue(XPathFragment xPathFragment, MarshalRecord marshalRecord, Object object, Object objectValue, AbstractSession session, NamespaceResolver namespaceResolver, MarshalContext marshalContext) {
        if(objectValue == null) {
            AbstractNullPolicy nullPolicy = xmlBinaryDataCollectionMapping.getNullPolicy();
            if (nullPolicy.getMarshalNullRepresentation() != XMLNullRepresentationType.ABSENT_NODE) {
                XPathNode holderXPathNode = new XPathNode();
                holderXPathNode.setXPathFragment(xPathFragment);
                marshalRecord.addGroupingElement(holderXPathNode);
                boolean returnVal = xmlBinaryDataCollectionMapping.getNullPolicy().directMarshal(xPathFragment, marshalRecord, object, session, namespaceResolver);
                if(returnVal){

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                    itemsMapping.setUsesSingleNode(true);
                    itemsMapping.setXPath("item/text()");
                    XMLField xField = (XMLField)itemsMapping.getField();
                    xField.setRequired(true);
                    itemsMapping.useCollectionClassName("java.util.ArrayList");
                    AbstractNullPolicy nullPolicy = itemsMapping.getNullPolicy();
                    nullPolicy.setNullRepresentedByEmptyNode(false);
                    nullPolicy.setMarshalNullRepresentation(XSI_NIL);
                    nullPolicy.setNullRepresentedByXsiNil(true);
                    itemsMapping.setNullPolicy(nullPolicy);
                    xdesc.getNamespaceResolver().put(SCHEMA_INSTANCE_PREFIX,
                        W3C_XML_SCHEMA_INSTANCE_NS_URI); // to support xsi:nil policy
                    xdesc.addMapping(itemsMapping);
                }

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                            fieldMapping.setUsesSingleNode(true);
                            fieldMapping.setXPath(lfieldName + "/item/text()");
                            XMLField xField = (XMLField)fieldMapping.getField();
                            xField.setRequired(true);
                            fieldMapping.useCollectionClassName("java.util.ArrayList");
                            AbstractNullPolicy nullPolicy = fieldMapping.getNullPolicy();
                            nullPolicy.setNullRepresentedByEmptyNode(false);
                            nullPolicy.setMarshalNullRepresentation(XSI_NIL);
                            nullPolicy.setNullRepresentedByXsiNil(true);
                            fieldMapping.setNullPolicy(nullPolicy);
                            xdesc.getNamespaceResolver().put(SCHEMA_INSTANCE_PREFIX,
                                W3C_XML_SCHEMA_INSTANCE_NS_URI); // to support xsi:nil policy
                            xdesc.addMapping(fieldMapping);
                        }
                    }
                    else if (top.isRecord()) {
                        XMLCompositeObjectMapping fieldMapping = new XMLCompositeObjectMapping();
                        fieldMapping.setAttributeName(lfieldName);
                        fieldMapping.setXPath(lfieldName);
                        XMLField xField = (XMLField)fieldMapping.getField();
                        xField.setRequired(true);
                        fieldMapping.setReferenceClassName(((RecordHelper)top).recordName().toLowerCase());
                        xdesc.addMapping(fieldMapping);
                    }
                }
                else {
                    XMLDirectMapping fieldMapping = new XMLDirectMapping();
                    fieldMapping.setAttributeName(lfieldName);
                    XMLField xField = new XMLField(lfieldName + "/text()");
                    xField.setRequired(true);
                    QName qnameFromDatabaseType = qnameFromDatabaseType(top);
                    xField.setSchemaType(qnameFromDatabaseType);
                    // special case to avoid Calendar problems
                    if (qnameFromDatabaseType == DATE_QNAME) {
                        fieldMapping.setAttributeClassification(java.sql.Date.class);
                        xField.addXMLConversion(DATE_QNAME, java.sql.Date.class);
                        xField.addJavaConversion(java.sql.Date.class, DATE_QNAME);
                        xdesc.getNamespaceResolver().put(SCHEMA_INSTANCE_PREFIX,
                            W3C_XML_SCHEMA_INSTANCE_NS_URI);
                        xdesc.getNamespaceResolver().put(SCHEMA_PREFIX, W3C_XML_SCHEMA_NS_URI);
                    }
                    else {
                        Class<?> attributeClass = (Class<?>)XMLConversionManager.getDefaultXMLTypes().
                            get(qnameFromDatabaseType);
                        if (attributeClass == null) {
                            attributeClass =  Object_Class;
                        }
                        fieldMapping.setAttributeClassification(attributeClass);
                    }
                    fieldMapping.setField(xField);
                    AbstractNullPolicy nullPolicy = fieldMapping.getNullPolicy();
                    nullPolicy.setNullRepresentedByEmptyNode(false);
                    nullPolicy.setMarshalNullRepresentation(XSI_NIL);
                    nullPolicy.setNullRepresentedByXsiNil(true);
                    fieldMapping.setNullPolicy(nullPolicy);
                    xdesc.getNamespaceResolver().put(SCHEMA_INSTANCE_PREFIX,
                        W3C_XML_SCHEMA_INSTANCE_NS_URI); // to support xsi:nil policy
                    xdesc.addMapping(fieldMapping);
                }

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                                attributeClass =  Object_Class;
                            }
                            fieldMapping.setAttributeClassification(attributeClass);
                        }
                        fieldMapping.setField(xField);
                        AbstractNullPolicy nullPolicy = fieldMapping.getNullPolicy();
                        nullPolicy.setNullRepresentedByEmptyNode(false);
                        nullPolicy.setMarshalNullRepresentation(XSI_NIL);
                        nullPolicy.setNullRepresentedByXsiNil(true);
                        fieldMapping.setNullPolicy(nullPolicy);
                        xdesc.getNamespaceResolver().put(SCHEMA_INSTANCE_PREFIX,
                            W3C_XML_SCHEMA_INSTANCE_NS_URI); // to support xsi:nil policy
                        xdesc.addMapping(fieldMapping);
                    }
                    // last attribute, pop ObjectTypeHelper off stack
                    int numAttributes = objectTypeHelper.decrNumAttributes();
                    if (numAttributes == 0) {
                        stac.pop();
                    }
                }
                else if (listenerHelper2.isArray()) {
                    SqlArrayTypeHelper sqlArrayTypeHelper = (SqlArrayTypeHelper)listenerHelper2;
                    XMLDescriptor xdesc = descriptorMap.get(sqlArrayTypeHelper.arrayTypename());
                    DatabaseMapping dm = xdesc.getMappingForAttributeName(attributeName);
                    if (dm == null) {
                        XMLCompositeDirectCollectionMapping dirCollectMapping =
                            new XMLCompositeDirectCollectionMapping();
                        SqltypeHelper componentType = new SqltypeHelper(sqlTypeName);
                        dirCollectMapping.setAttributeElementClass(
                            attributeClassFromDatabaseType((DefaultListenerHelper)componentType));
                        dirCollectMapping.setAttributeName(attributeName);
                        dirCollectMapping.setUsesSingleNode(true);
                        dirCollectMapping.setXPath(attributeName + "/text()");
                        XMLField xField = (XMLField)dirCollectMapping.getField();
                        xField.setRequired(true);
                        xField.setSchemaType(qnameFromDatabaseType(componentType));
                        dirCollectMapping.useCollectionClassName("java.util.ArrayList");
                        AbstractNullPolicy nullPolicy = dirCollectMapping.getNullPolicy();
                        nullPolicy.setNullRepresentedByEmptyNode(false);
                        nullPolicy.setMarshalNullRepresentation(XSI_NIL);
                        nullPolicy.setNullRepresentedByXsiNil(true);
                        dirCollectMapping.setNullPolicy(nullPolicy);
                        xdesc.getNamespaceResolver().put(SCHEMA_INSTANCE_PREFIX,
                            W3C_XML_SCHEMA_INSTANCE_NS_URI); // to support xsi:nil policy
                        xdesc.addMapping(dirCollectMapping);
                    }
                }
            }
            else if (listenerHelper.isArray()) {
                SqlArrayTypeHelper sqlArrayTypeHelper2 = (SqlArrayTypeHelper)listenerHelper;
                XMLDescriptor xdesc = descriptorMap.get(sqlArrayTypeHelper2.arrayTypename());
                DatabaseMapping dm = xdesc.getMappingForAttributeName(ITEMS_MAPPING_ATTRIBUTE_NAME);
                if (dm == null) {
                    XMLCompositeDirectCollectionMapping itemsMapping = new XMLCompositeDirectCollectionMapping();
                    SqltypeHelper componentType = new SqltypeHelper(sqlTypeName);
                    itemsMapping.setAttributeElementClass(
                        attributeClassFromDatabaseType((DefaultListenerHelper)componentType));
                    itemsMapping.setAttributeName(ITEMS_MAPPING_ATTRIBUTE_NAME);
                    itemsMapping.setUsesSingleNode(true);
                    itemsMapping.setXPath(ITEM_MAPPING_NAME + "/text()");
                    XMLField xField = (XMLField)itemsMapping.getField();
                    xField.setRequired(true);
                    xField.setSchemaType(qnameFromDatabaseType(componentType));
                    itemsMapping.useCollectionClassName("java.util.ArrayList");
                    AbstractNullPolicy nullPolicy = itemsMapping.getNullPolicy();
                    nullPolicy.setNullRepresentedByEmptyNode(false);
                    nullPolicy.setMarshalNullRepresentation(XSI_NIL);
                    nullPolicy.setNullRepresentedByXsiNil(true);
                    itemsMapping.setNullPolicy(nullPolicy);
                    xdesc.getNamespaceResolver().put(SCHEMA_INSTANCE_PREFIX,
                        W3C_XML_SCHEMA_INSTANCE_NS_URI); // to support xsi:nil policy
                    xdesc.addMapping(itemsMapping);
                }
                ListenerHelper listenerHelper2 = stac.peek();
                if (listenerHelper2.isAttribute()) {
                    // type built above used in field definition of object further up stack
                    stac.pop();
                    AttributeFieldHelper fieldHelper = (AttributeFieldHelper)listenerHelper2;
                    ListenerHelper listenerHelper3 = stac.peek();
                    if (listenerHelper3.isObject()) {
                        ObjectTypeHelper objectTypeHelper = (ObjectTypeHelper)listenerHelper3;
                        XMLDescriptor xdesc2 = descriptorMap.get(objectTypeHelper.objectTypename());
                        String fieldName = fieldHelper.attributeFieldName();
                        DatabaseMapping dm2 = xdesc2.getMappingForAttributeName(fieldName.toLowerCase());
                        if (dm2 == null) {
                            XMLCompositeDirectCollectionMapping fieldMapping = new XMLCompositeDirectCollectionMapping();
                            SqltypeHelper componentType = new SqltypeHelper(sqlTypeName);
                            fieldMapping.setAttributeElementClass(
                                attributeClassFromDatabaseType((DefaultListenerHelper)componentType));
                            fieldMapping.setAttributeName(fieldName.toLowerCase());
                            XMLField field = new XMLField(fieldName.toLowerCase() + "/" +
                                ITEM_MAPPING_NAME + "/text()");
                            field.setRequired(true);
                            fieldMapping.setField(field);
                            field.setSchemaType(qnameFromDatabaseType(componentType));
                            fieldMapping.useCollectionClassName("java.util.ArrayList");
                            AbstractNullPolicy nullPolicy = fieldMapping.getNullPolicy();
                            nullPolicy.setNullRepresentedByEmptyNode(false);
                            nullPolicy.setMarshalNullRepresentation(XSI_NIL);
                            nullPolicy.setNullRepresentedByXsiNil(true);
                            fieldMapping.setNullPolicy(nullPolicy);
                            xdesc2.getNamespaceResolver().put(SCHEMA_INSTANCE_PREFIX,
                                W3C_XML_SCHEMA_INSTANCE_NS_URI); // to support xsi:nil policy
                            xdesc2.addMapping(fieldMapping);
                        }

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            return false;
        }
        
        Object value = xmlChoiceCollectionMapping.getAttributeValueFromObject(object);
        if(value == null) {
            AbstractNullPolicy wrapperNP = xmlChoiceCollectionMapping.getWrapperNullPolicy();
            if (wrapperNP != null && wrapperNP.getMarshalNullRepresentation().equals(XMLNullRepresentationType.XSI_NIL)) {
                marshalRecord.nilSimple(namespaceResolver);
                return true;
            } else {
                return false;
            }

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     * @return
     * @see org.eclipse.persistence.oxm.mappings.nullpolicy.AbstractNullPolicy
     * @see org.eclipse.persistence.jaxb.xmlmodel.XmlAbstractNullPolicy
     */
    private AbstractNullPolicy getNullPolicyFromProperty(Property property, NamespaceResolver nsr) {
        AbstractNullPolicy absNullPolicy = null;
        XmlAbstractNullPolicy xmlAbsNullPolicy = property.getNullPolicy();


        // policy is assumed to be one of XmlNullPolicy or XmlIsSetNullPolicy
        if (xmlAbsNullPolicy instanceof XmlNullPolicy) {
            XmlNullPolicy xmlNullPolicy = (XmlNullPolicy) xmlAbsNullPolicy;
            NullPolicy nullPolicy = new NullPolicy();
            nullPolicy.setSetPerformedForAbsentNode(xmlNullPolicy.isIsSetPerformedForAbsentNode());
            absNullPolicy = nullPolicy;
        } else {
            XmlIsSetNullPolicy xmlIsSetNullPolicy = (XmlIsSetNullPolicy) xmlAbsNullPolicy;
            IsSetNullPolicy isSetNullPolicy = new IsSetNullPolicy();
            isSetNullPolicy.setIsSetMethodName(xmlIsSetNullPolicy.getIsSetMethodName());
            // handle isSetParams
            ArrayList<Object> parameters = new ArrayList<Object>();
            ArrayList<Class> parameterTypes = new ArrayList<Class>();
            List<XmlIsSetNullPolicy.IsSetParameter> params = xmlIsSetNullPolicy.getIsSetParameter();
            for (XmlIsSetNullPolicy.IsSetParameter param : params) {
                String valueStr = param.getValue();
                String typeStr = param.getType();
                // create a conversion manager instance with the helper's loader
                XMLConversionManager mgr = new XMLConversionManager();
                mgr.setLoader(helper.getClassLoader());
                // handle parameter type
                Class typeClass = mgr.convertClassNameToClass(typeStr);
                // handle parameter value
                Object parameterValue = mgr.convertObject(valueStr, typeClass);
                parameters.add(parameterValue);
                parameterTypes.add(typeClass);
            }
            isSetNullPolicy.setIsSetParameters(parameters.toArray());
            isSetNullPolicy.setIsSetParameterTypes(parameterTypes.toArray(new Class[parameterTypes.size()]));
            absNullPolicy = isSetNullPolicy;
        }
        // handle commmon settings
        absNullPolicy.setMarshalNullRepresentation(XMLNullRepresentationType.valueOf(xmlAbsNullPolicy.getNullRepresentationForXml().name()));
        absNullPolicy.setNullRepresentedByEmptyNode(xmlAbsNullPolicy.isEmptyNodeRepresentsNull());
        boolean xsiRepresentsNull = xmlAbsNullPolicy.isXsiNilRepresentsNull();
        if (xsiRepresentsNull) {
            absNullPolicy.setNullRepresentedByXsiNil(true);
        }


        return absNullPolicy;
    }

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            return false;
        }
        ContainerPolicy cp = xmlAnyCollectionMapping.getContainerPolicy();
        Object collection = xmlAnyCollectionMapping.getAttributeAccessor().getAttributeValueFromObject(object);
        if (null == collection) {
            AbstractNullPolicy wrapperNP = xmlAnyCollectionMapping.getWrapperNullPolicy();
            if (wrapperNP != null && wrapperNP.getMarshalNullRepresentation().equals(XMLNullRepresentationType.XSI_NIL)) {
                marshalRecord.nilSimple(namespaceResolver);
                return true;
            } else {
                return false;
            }

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        if (xmlBinaryDataCollectionMapping.isReadOnly()) {
            return false;
        }
        Object collection = xmlBinaryDataCollectionMapping.getAttributeAccessor().getAttributeValueFromObject(object);
        if (null == collection) {
            AbstractNullPolicy wrapperNP = xmlBinaryDataCollectionMapping.getWrapperNullPolicy();
            if (wrapperNP != null && wrapperNP.getMarshalNullRepresentation().equals(XMLNullRepresentationType.XSI_NIL)) {
                marshalRecord.nilSimple(namespaceResolver);
                return true;
            } else {
                return false;
            }

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        }


        ContainerPolicy cp = getContainerPolicy();
        Object collection = xmlCompositeDirectCollectionMapping.getAttributeAccessor().getAttributeValueFromObject(object);
        if (null == collection) {
            AbstractNullPolicy wrapperNP = xmlCompositeDirectCollectionMapping.getWrapperNullPolicy();
            if (wrapperNP != null && wrapperNP.getMarshalNullRepresentation().equals(XMLNullRepresentationType.XSI_NIL)) {
                marshalRecord.nilSimple(namespaceResolver);
                return true;
            } else {
                return false;
            }

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        }


        ContainerPolicy cp = getContainerPolicy();
        Object collection = xmlCompositeCollectionMapping.getAttributeAccessor().getAttributeValueFromObject(object);
        if (null == collection) {
            AbstractNullPolicy wrapperNP = xmlCompositeCollectionMapping.getWrapperNullPolicy();
            if (wrapperNP != null && wrapperNP.getMarshalNullRepresentation().equals(XMLNullRepresentationType.XSI_NIL)) {
                marshalRecord.nilSimple(namespaceResolver);
                return true;
            } else {
                return false;
            }

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