org.eclipse.persistence.oxm.mappings
Class XMLCompositeObjectMapping

java.lang.Object
  org.eclipse.persistence.mappings.DatabaseMapping
      org.eclipse.persistence.mappings.AggregateMapping
          org.eclipse.persistence.mappings.foundation.AbstractCompositeObjectMapping
              org.eclipse.persistence.oxm.mappings.XMLCompositeObjectMapping

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, XMLMapping, XMLNillableMapping

public class XMLCompositeObjectMapping
extends AbstractCompositeObjectMapping
implements XMLMapping, XMLNillableMapping

Composite object XML mappings represent a relationship between two classes. In XML, the "owned" class may be nested with the element tag representing the "owning" class. This mapping is, by definition, privately owned.

Composite object XML mappings can be used in the following scenarios:

• Mapping into the Parent Record
• Mapping to an Element
• Mapping to Different Elements by Element Name
• Mapping to Different Elements by Element Position

Setting the XPath: TopLink XML mappings make use of XPath statements to find the relevant data in an XML document. The XPath statement is relative to the context node specified in the descriptor. The XPath may contain path and positional information; the last node in the XPath forms the local root node for the composite object. The XPath is specified on the mapping using the setXPath method.

The following XPath statements may be used to specify the location of XML data relating to an object's name attribute:

XPath	Description
.	Indicates "self".
phone-number	The phone-number information is stored in the phone-number element.
contact-info/phone-number	The XPath statement may be used to specify any valid path.
phone-number[2]	The XPath statement may contain positional information. In this case the phone-number information is stored in the second occurrence of the phone-number element.

Mapping into the Parent Record: The composite object may be mapped into the parent record in a corresponding XML document.

XML Schema
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<xsd:element name="customer" type="customer-type"/>
<xsd:complexType name="customer-type">
<xsd:sequence>
<xsd:element name="first-name" type="xsd:string"/>
<xsd:element name="last-name" type="xsd:string"/>
<xsd:element name="street" type="xsd:string"/>
<xsd:element name="city" type="xsd:string"/>
</xsd:sequence>
</xsd:complexType>
</xsd:schema>

Code Sample
XMLCompositeObjectMapping addressMapping = new XMLCompositeObjectMapping();
addressMapping.setAttributeName("address");
addressMapping.setXPath(".");
addressMapping.setReferenceClass(Address.class);


Mapping to an Element: The composite object may be mapped to an element in a corresponding XML document.

XML Schema
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<xsd:element name="customer" type="customer-type"/>
<xsd:complexType name="customer-type">
<xsd:sequence>
<xsd:element name="first-name" type="xsd:string"/>
<xsd:element name="last-name" type="xsd:string"/>
<xsd:element name="address">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="street" type="xsd:string"/>
<xsd:element name="city" type="xsd:string"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
</xsd:schema>


Code Sample
XMLCompositeObjectMapping addressMapping = new XMLCompositeObjectMapping();
addressMapping.setAttributeName("address");
addressMapping.setXPath("address");
addressMapping.setReferenceClass(Address.class);


More Information: For more information about using the XML Composite Object Mapping, see the "Understanding XML Mappings" chapter of the Oracle TopLink Developer's Guide.

See Also:

Serialized Form

Since:

Oracle TopLink 10g Release 2 (10.1.3)

Field Summary

Fields inherited from class org.eclipse.persistence.mappings.foundation.AbstractCompositeObjectMapping

converter, field

Fields inherited from class org.eclipse.persistence.mappings.AggregateMapping

referenceClass, referenceClassName, referenceDescriptor

Fields inherited from class org.eclipse.persistence.mappings.DatabaseMapping

attributeAccessor, attributeName, descriptor, fields, isLazy, isOptional, isReadOnly, isRemotelyInitialized, NO_FIELDS, NO_WEIGHT, primaryKeyMapping, properties, weight, WEIGHT_1

Constructor Summary

XMLCompositeObjectMapping()

Method Summary

protected java.lang.Object	buildCompositeObject(org.eclipse.persistence.internal.descriptors.ObjectBuilder objectBuilder, org.eclipse.persistence.internal.sessions.AbstractRecord nestedRow, ObjectBuildingQuery query, org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager)
protected java.lang.Object	buildCompositeRow(java.lang.Object attributeValue, org.eclipse.persistence.internal.sessions.AbstractSession session, org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow)
void	configureNestedRow(org.eclipse.persistence.internal.sessions.AbstractRecord parent, org.eclipse.persistence.internal.sessions.AbstractRecord child)
AbstractNullPolicy	getNullPolicy() INTERNAL: Get the AbstractNullPolicy from the Mapping.
protected ClassDescriptor	getReferenceDescriptor(java.lang.Class theClass, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: For inheritance purposes.
ClassDescriptor	getReferenceDescriptor(DOMRecord xmlRecord)
java.lang.String	getXPath() Get the XPath String
void	initialize(org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: The mapping is initialized with the given session.
boolean	isXMLMapping() INTERNAL:
java.lang.Object	readFromRowIntoObject(org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow, org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager, java.lang.Object targetObject, ObjectBuildingQuery sourceQuery, org.eclipse.persistence.internal.sessions.AbstractSession executionSession) INTERNAL: Extract value from the row and set the attribute to this value in the object.
void	setNullPolicy(AbstractNullPolicy aNullPolicy) Set the AbstractNullPolicy on the mapping The default policy is NullPolicy.
void	setXPath(java.lang.String xpathString) Set the Mapping field name attribute to the given XPath String
boolean	shouldAddXsiType(XMLRecord record, ClassDescriptor aDescriptor) INTERNAL:
java.lang.Object	valueFromRow(org.eclipse.persistence.internal.sessions.AbstractRecord row, org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager, ObjectBuildingQuery sourceQuery, org.eclipse.persistence.internal.sessions.AbstractSession executionSession) INTERNAL: Extract and return the aggregate object from the specified row.
java.lang.Object	valueFromRow(java.lang.Object fieldValue, XMLRecord nestedRow, org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager, ObjectBuildingQuery sourceQuery, org.eclipse.persistence.internal.sessions.AbstractSession executionSession)
void	writeFromObjectIntoRow(java.lang.Object object, org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL:
void	writeSingleValue(java.lang.Object value, java.lang.Object parent, XMLRecord record, org.eclipse.persistence.internal.sessions.AbstractSession session) INTERNAL: A method that marshals a single value to the provided Record based on this mapping's XPath.

Methods inherited from class org.eclipse.persistence.mappings.foundation.AbstractCompositeObjectMapping

buildShallowOriginalFromRow, cascadeDiscoverAndPersistUnregisteredNewObjects, cascadePerformRemoveIfRequired, cascadeRegisterNewIfRequired, collectFields, getAttributeValueFromObject, getConverter, getField, hasConverter, isAbstractCompositeObjectMapping, setAttributeValueInObject, setConverter, setField, valueFromObject, writeFromObjectIntoRowForUpdate, writeFromObjectIntoRowWithChangeRecord, writeInsertFieldsIntoRow

Methods inherited from class org.eclipse.persistence.mappings.AggregateMapping

buildAggregateDeleteQuery, buildAggregateModifyQuery, buildAggregateWriteQuery, buildBackupClone, buildBackupClonePart, buildClone, buildCloneFromRow, buildClonePart, buildCopy, buildCopyOfAttributeValue, buildExpression, buildNewMergeInstanceOf, compareAttributeValues, compareForChange, compareObjects, convertClassNamesToClasses, executeEvent, fixAttributeValue, fixObjectReferences, getAttributeValueFromBackupClone, getObjectBuilder, getObjectBuilderForClass, getQueryManager, getReferenceClass, getReferenceClassName, getReferenceDescriptor, getReferenceDescriptor, isAggregateMapping, iterate, iterateOnAttributeValue, mergeAttributeValue, mergeChangesIntoObject, mergeIntoObject, postDelete, postDeleteAttributeValue, postInsert, postInsertAttributeValue, postUpdate, postUpdateAttributeValue, preDelete, preDeleteAttributeValue, preInsert, preInsertAttributeValue, preUpdate, preUpdateAttributeValue, remoteInitialization, setReferenceClass, setReferenceClassName, setReferenceDescriptor, updateChangeRecord, verifyDelete, verifyDeleteOfAttributeValue

Methods inherited from class org.eclipse.persistence.mappings.DatabaseMapping

addToCollectionChangeRecord, buildBackupCloneForPartObject, buildChangeRecord, buildCloneForPartObject, buildObjectJoinExpression, buildObjectJoinExpression, calculateDeferredChanges, cascadeMerge, clone, cloneFields, createUnitOfWorkValueHolder, extractNestedExpressions, fixRealObjectReferences, getAttributeAccessor, getAttributeClassification, getAttributeName, getContainerPolicy, getDescriptor, getFieldClassification, getFields, getGetMethodName, getObjectCorrespondingTo, getProperties, getProperty, getRealAttributeValueFromObject, getRealCollectionAttributeValueFromObject, getRelationshipPartner, getSelectFields, getSelectTables, getSetMethodName, getValueFromRemoteValueHolder, getWeight, hasConstraintDependency, hasDependency, hasInverseConstraintDependency, hasRootExpressionThatShouldUseOuterJoin, instantiateAttribute, isAbstractCompositeCollectionMapping, isAbstractCompositeDirectCollectionMapping, isAbstractDirectMapping, isAggregateCollectionMapping, isAggregateObjectMapping, isCascadedLockingSupported, isChangeTrackingSupported, isCloningRequired, isCollectionMapping, isDatabaseMapping, isDirectCollectionMapping, isDirectMapMapping, isDirectToFieldMapping, isDirectToXMLTypeMapping, isEISMapping, isForeignReferenceMapping, isJoiningSupported, isLazy, isManyToManyMapping, isNestedTableMapping, isObjectReferenceMapping, isOneToManyMapping, isOneToOneMapping, isOptional, isPrimaryKeyMapping, isPrivateOwned, isReadOnly, isReferenceMapping, isRelationalMapping, isRemotelyInitialized, isStructureMapping, isTransformationMapping, isUsingMethodAccess, isVariableOneToOneMapping, isWriteOnly, iterateOnRealAttributeValue, performDataModificationEvent, postInitialize, preInitialize, prepareCascadeLockingPolicy, readFromResultSetIntoObject, readFromRowIntoObject, readOnly, readWrite, rehashFieldDependancies, remotelyInitialized, removeFromCollectionChangeRecord, replaceValueHoldersIn, setAttributeAccessor, setAttributeName, setChangeListener, setDescriptor, setFields, setGetMethodName, setIsLazy, setIsOptional, setIsPrimaryKeyMapping, setIsReadOnly, setProperties, setProperty, setRealAttributeValueInObject, setSetMethodName, setWeight, simpleAddToCollectionChangeRecord, simpleRemoveFromCollectionChangeRecord, toString, validateAfterInitialization, validateBeforeInitialization, valueFromResultSet, valueFromRow, writeFromAttributeIntoRow, writeFromObjectIntoRowForShallowInsert, writeFromObjectIntoRowForShallowInsertWithChangeRecord, writeFromObjectIntoRowForWhereClause, writeUpdateFieldsIntoRow

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

XMLCompositeObjectMapping

public XMLCompositeObjectMapping()

Method Detail

initialize

public void initialize(org.eclipse.persistence.internal.sessions.AbstractSession session)
                throws DescriptorException

INTERNAL: The mapping is initialized with the given session. This mapping is fully initialized after this.

Overrides:

initialize in class AbstractCompositeObjectMapping

Throws:

DescriptorException

setNullPolicy

public void setNullPolicy(AbstractNullPolicy aNullPolicy)

Set the AbstractNullPolicy on the mapping
The default policy is NullPolicy.

Specified by:

setNullPolicy in interface XMLNillableMapping

Parameters:

aNullPolicy -

getNullPolicy

public AbstractNullPolicy getNullPolicy()

INTERNAL: Get the AbstractNullPolicy from the Mapping.
The default policy is NullPolicy.

Specified by:

getNullPolicy in interface XMLNillableMapping

Returns:

isXMLMapping

public boolean isXMLMapping()

INTERNAL:

Overrides:

isXMLMapping in class DatabaseMapping

getXPath

public java.lang.String getXPath()

Get the XPath String

Returns:

String the XPath String associated with this Mapping

setXPath

public void setXPath(java.lang.String xpathString)

Set the Mapping field name attribute to the given XPath String

Parameters:

xpathString - String

buildCompositeRow

protected java.lang.Object buildCompositeRow(java.lang.Object attributeValue,
                                             org.eclipse.persistence.internal.sessions.AbstractSession session,
                                             org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow)

Specified by:

buildCompositeRow in class AbstractCompositeObjectMapping

buildCompositeObject

protected java.lang.Object buildCompositeObject(org.eclipse.persistence.internal.descriptors.ObjectBuilder objectBuilder,
                                                org.eclipse.persistence.internal.sessions.AbstractRecord nestedRow,
                                                ObjectBuildingQuery query,
                                                org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager)

Specified by:

buildCompositeObject in class AbstractCompositeObjectMapping

readFromRowIntoObject

public java.lang.Object readFromRowIntoObject(org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow,
                                              org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager,
                                              java.lang.Object targetObject,
                                              ObjectBuildingQuery sourceQuery,
                                              org.eclipse.persistence.internal.sessions.AbstractSession executionSession)
                                       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

valueFromRow

public java.lang.Object valueFromRow(java.lang.Object fieldValue,
                                     XMLRecord nestedRow,
                                     org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager,
                                     ObjectBuildingQuery sourceQuery,
                                     org.eclipse.persistence.internal.sessions.AbstractSession executionSession)
                              throws DatabaseException

Throws:

DatabaseException

valueFromRow

public java.lang.Object valueFromRow(org.eclipse.persistence.internal.sessions.AbstractRecord row,
                                     org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManager,
                                     ObjectBuildingQuery sourceQuery,
                                     org.eclipse.persistence.internal.sessions.AbstractSession executionSession)
                              throws DatabaseException

Description copied from class: AbstractCompositeObjectMapping

INTERNAL: Extract and return the aggregate object from the specified row.

Overrides:

valueFromRow in class AbstractCompositeObjectMapping

Throws:

DatabaseException

writeFromObjectIntoRow

public void writeFromObjectIntoRow(java.lang.Object object,
                                   org.eclipse.persistence.internal.sessions.AbstractRecord databaseRow,
                                   org.eclipse.persistence.internal.sessions.AbstractSession session)
                            throws DescriptorException

INTERNAL:

Overrides:

writeFromObjectIntoRow in class AbstractCompositeObjectMapping

Throws:

DescriptorException

writeSingleValue

public void writeSingleValue(java.lang.Object value,
                             java.lang.Object parent,
                             XMLRecord record,
                             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 XMLMapping

Parameters:

value - - The value to be marshalled

record - - The Record the value is being marshalled too.

configureNestedRow

public void configureNestedRow(org.eclipse.persistence.internal.sessions.AbstractRecord parent,
                               org.eclipse.persistence.internal.sessions.AbstractRecord child)

getReferenceDescriptor

public ClassDescriptor getReferenceDescriptor(DOMRecord xmlRecord)

getReferenceDescriptor

protected ClassDescriptor getReferenceDescriptor(java.lang.Class theClass,
                                                 org.eclipse.persistence.internal.sessions.AbstractSession session)

Description copied from class: AggregateMapping

INTERNAL: For inheritance purposes.

Overrides:

getReferenceDescriptor in class AggregateMapping

shouldAddXsiType

public boolean shouldAddXsiType(XMLRecord record,
                                ClassDescriptor aDescriptor)

INTERNAL: