org.eclipse.persistence.oxm.mappings
Class XMLCompositeCollectionMapping

java.lang.Object
  org.eclipse.persistence.mappings.DatabaseMapping
      org.eclipse.persistence.mappings.AggregateMapping
          org.eclipse.persistence.mappings.foundation.AbstractCompositeCollectionMapping
              org.eclipse.persistence.oxm.mappings.XMLCompositeCollectionMapping

All Implemented Interfaces:

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

public class XMLCompositeCollectionMapping
extends AbstractCompositeCollectionMapping
implements XMLMapping

Composite collection XML mappings map an attribute that contains a homogeneous collection of objects to multiple XML elements. Use composite collection XML mappings to represent one-to-many relationships. Composite collection XML mappings can reference any class that has a TopLink descriptor. The attribute in the object mapped must implement either the Java Collection interface (for example, Vector or HashSet) or Map interface (for example, Hashtable or TreeMap). The CompositeCollectionMapping class allows a reference to the mapped class and the indexing type for that class. This mapping is, by definition, privately owned.

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
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 a Composite Collection:

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="phone-number">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="number" type="xsd:string"/>
</xsd:sequence>
<xsd:attribute name="type" type="xsd:string"/>
</xsd:complexType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
</xsd:schema>


Code Sample
XMLCompositeCollectionMapping phoneNumbersMapping = new XMLCompositeCollectionMapping();
phoneNumbersMapping.setAttributeName("phoneNumbers");
phoneNumbersMapping.setXPath("phone-number");
phoneNumbersMapping.setReferenceClass(PhoneNumber.class);


More Information: For more information about using the XML Composite Collection 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.AbstractCompositeCollectionMapping

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

XMLCompositeCollectionMapping()

Method Summary

protected java.lang.Object	buildCompositeObject(ClassDescriptor descriptor, org.eclipse.persistence.internal.sessions.AbstractRecord nestedRow, ObjectBuildingQuery query, org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManger)
protected org.eclipse.persistence.internal.sessions.AbstractRecord	buildCompositeRow(java.lang.Object attributeValue, org.eclipse.persistence.internal.sessions.AbstractSession session, org.eclipse.persistence.internal.sessions.AbstractRecord parentRow)
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:
void	setXPath(java.lang.String xpathString) Set the Mapping field name attribute to the given XPath String
boolean	shouldAddXsiType(XMLRecord record, ClassDescriptor descriptor) 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: Build and return an aggregate collection from the specified row.
void	writeFromObjectIntoRow(java.lang.Object object, org.eclipse.persistence.internal.sessions.AbstractRecord row, 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.AbstractCompositeCollectionMapping

buildAddedElementFromChangeSet, buildBackupClonePart, buildChangeSet, buildClonePart, buildCopyOfAttributeValue, buildElementFromChangeSet, buildElementFromElement, buildRemovedElementFromChangeSet, cascadeDiscoverAndPersistUnregisteredNewObjects, cascadePerformRemoveIfRequired, cascadeRegisterNewIfRequired, collectFields, compareElements, compareElementsForChange, compareForChange, compareObjects, convertClassNamesToClasses, convertToChangeRecord, fixAttributeValue, getAttributeValueFromBackupClone, getContainerPolicy, getConverter, getField, getRealCollectionAttributeValueFromObject, getStructureName, hasConverter, isAbstractCompositeCollectionMapping, iterateOnAttributeValue, mapKeyHasChanged, mergeChangesIntoObject, mergeIntoObject, postDeleteAttributeValue, postInsertAttributeValue, postUpdateAttributeValue, preDeleteAttributeValue, preInsertAttributeValue, preUpdateAttributeValue, setContainerPolicy, setConverter, setField, simpleAddToCollectionChangeRecord, simpleRemoveFromCollectionChangeRecord, useCollectionClass, useCollectionClassName, useListClassName, useMapClass, useMapClassName, verifyDeleteOfAttributeValue, writeFromObjectIntoRowForUpdate, writeFromObjectIntoRowWithChangeRecord, writeInsertFieldsIntoRow

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

buildAggregateDeleteQuery, buildAggregateModifyQuery, buildAggregateWriteQuery, buildBackupClone, buildClone, buildCloneFromRow, buildCopy, buildExpression, buildNewMergeInstanceOf, compareAttributeValues, executeEvent, fixObjectReferences, getObjectBuilder, getObjectBuilderForClass, getQueryManager, getReferenceClass, getReferenceClassName, getReferenceDescriptor, getReferenceDescriptor, isAggregateMapping, iterate, mergeAttributeValue, postDelete, postInsert, postUpdate, preDelete, preInsert, preUpdate, remoteInitialization, setReferenceClass, setReferenceClassName, setReferenceDescriptor, updateChangeRecord, verifyDelete

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

addToCollectionChangeRecord, buildBackupCloneForPartObject, buildChangeRecord, buildCloneForPartObject, buildObjectJoinExpression, buildObjectJoinExpression, buildShallowOriginalFromRow, calculateDeferredChanges, cascadeMerge, clone, cloneFields, createUnitOfWorkValueHolder, extractNestedExpressions, fixRealObjectReferences, getAttributeAccessor, getAttributeClassification, getAttributeName, getAttributeValueFromObject, getDescriptor, getFieldClassification, getFields, getGetMethodName, getObjectCorrespondingTo, getProperties, getProperty, getRealAttributeValueFromObject, getRelationshipPartner, getSelectFields, getSelectTables, getSetMethodName, getValueFromRemoteValueHolder, getWeight, hasConstraintDependency, hasDependency, hasInverseConstraintDependency, hasRootExpressionThatShouldUseOuterJoin, instantiateAttribute, isAbstractCompositeDirectCollectionMapping, isAbstractCompositeObjectMapping, 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, readFromRowIntoObject, readOnly, readWrite, rehashFieldDependancies, remotelyInitialized, removeFromCollectionChangeRecord, replaceValueHoldersIn, setAttributeAccessor, setAttributeName, setAttributeValueInObject, setChangeListener, setDescriptor, setFields, setGetMethodName, setIsLazy, setIsOptional, setIsPrimaryKeyMapping, setIsReadOnly, setProperties, setProperty, setRealAttributeValueInObject, setSetMethodName, setWeight, toString, validateAfterInitialization, validateBeforeInitialization, valueFromObject, 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

XMLCompositeCollectionMapping

public XMLCompositeCollectionMapping()

Method Detail

isXMLMapping

public boolean isXMLMapping()

INTERNAL:

Overrides:

isXMLMapping in class DatabaseMapping

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 AbstractCompositeCollectionMapping

Throws:

DescriptorException

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

buildCompositeObject

protected java.lang.Object buildCompositeObject(ClassDescriptor descriptor,
                                                org.eclipse.persistence.internal.sessions.AbstractRecord nestedRow,
                                                ObjectBuildingQuery query,
                                                org.eclipse.persistence.internal.queries.JoinedAttributeManager joinManger)

Specified by:

buildCompositeObject in class AbstractCompositeCollectionMapping

buildCompositeRow

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

Specified by:

buildCompositeRow in class AbstractCompositeCollectionMapping

writeFromObjectIntoRow

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

INTERNAL:

Overrides:

writeFromObjectIntoRow in class AbstractCompositeCollectionMapping

Throws:

DescriptorException

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: AbstractCompositeCollectionMapping

INTERNAL: Build and return an aggregate collection from the specified row.

Overrides:

valueFromRow in class AbstractCompositeCollectionMapping

Throws:

DatabaseException

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 descriptor)

INTERNAL:

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.