/**
* INTERNAL: Get the appropriate attribute value from the object and put it in the appropriate
* field of the database row. Loop through the reference objects and extract the primary keys and
* put them in the vector of "nested" rows.
*/
public void writeFromObjectIntoRow(Object object, AbstractRecord row, AbstractSession session) {
if (!isForeignKeyRelationship) {
return;
}
if (((getSourceForeignKeysToTargetKeys()) == null)
|| (getSourceForeignKeysToTargetKeys().size() == 0)) {
return;
}
if (this.isReadOnly()) {
return;
}
AbstractRecord referenceRow =
this.getIndirectionPolicy().extractReferenceRow(this.getAttributeValueFromObject(object));
if (referenceRow != null) {
// the reference objects have not been instantiated - use the value from the original row
if (getForeignKeyGroupingElement() != null) {
row.put(
this.getForeignKeyGroupingElement(),
referenceRow.getValues(this.getForeignKeyGroupingElement()));
} else if (getSourceForeignKeyFields().size() > 0) {
DatabaseField foreignKeyField = (DatabaseField) getSourceForeignKeyFields().get(0);
row.put(foreignKeyField, referenceRow.getValues(foreignKeyField));
}
return;
}
ContainerPolicy cp = this.getContainerPolicy();
// extract the keys from the objects
Object attributeValue = this.getRealCollectionAttributeValueFromObject(object, session);
Vector nestedRows = new Vector(cp.sizeFor(attributeValue));
if (getForeignKeyGroupingElement() != null) {
for (Object iter = cp.iteratorFor(attributeValue); cp.hasNext(iter); ) {
XMLRecord nestedRow =
this.extractKeyRowFromReferenceObject(cp.next(iter, session), session, (XMLRecord) row);
nestedRows.addElement(nestedRow);
}
row.add(this.getForeignKeyGroupingElement(), nestedRows);
} else {
DatabaseField singleField = (DatabaseField) getSourceForeignKeyFields().get(0);
DatabaseField pkField = (DatabaseField) getSourceForeignKeysToTargetKeys().get(singleField);
for (Object iter = cp.iteratorFor(attributeValue); cp.hasNext(iter); ) {
Object singleValue =
getReferenceDescriptor()
.getObjectBuilder()
.extractValueFromObjectForField(cp.next(iter, session), pkField, session);
row.add(singleField, singleValue);
}
}
}
/**
* Compare the attributes. Return true if they are alike. The order of the elements is
* significant.
*/
private boolean compareAttributeValuesWithOrder(
Object collection1, Object collection2, AbstractSession session) {
ContainerPolicy cp = this.getContainerPolicy();
Object iter1 = cp.iteratorFor(collection1);
Object iter2 = cp.iteratorFor(collection2);
while (cp.hasNext(iter1)) {
if (!this.compareElements(cp.next(iter1, session), cp.next(iter2, session), session)) {
return false;
}
}
return true;
}
/** INTERNAL: Write the attribute value from the object to the row. */
public void writeFromObjectIntoRow(Object object, AbstractRecord row, AbstractSession session) {
// for each xmlField on this mapping
for (Iterator fieldIt = getFields().iterator(); fieldIt.hasNext(); ) {
XMLField xmlField = (XMLField) fieldIt.next();
ContainerPolicy cp = getContainerPolicy();
Object collection = getAttributeAccessor().getAttributeValueFromObject(object);
if (collection == null) {
return;
}
Object fieldValue;
Object objectValue;
String stringValue = "";
QName schemaType;
Object iterator = cp.iteratorFor(collection);
if (usesSingleNode()) {
while (cp.hasNext(iterator)) {
objectValue = cp.next(iterator, session);
fieldValue = buildFieldValue(objectValue, xmlField, session);
if (fieldValue != null) {
schemaType = getSchemaType(xmlField, fieldValue, session);
String newValue = getValueToWrite(schemaType, fieldValue, session);
if (newValue != null) {
stringValue += newValue;
if (cp.hasNext(iterator)) {
stringValue += SPACE;
}
}
}
}
if (!(stringValue.equals(""))) {
row.put(xmlField, stringValue);
}
} else {
ArrayList keyValues = new ArrayList();
while (cp.hasNext(iterator)) {
objectValue = cp.next(iterator, session);
fieldValue = buildFieldValue(objectValue, xmlField, session);
if (fieldValue != null) {
schemaType = getSchemaType(xmlField, fieldValue, session);
stringValue = getValueToWrite(schemaType, fieldValue, session);
// row.add(xmlField, stringValue);
keyValues.add(stringValue);
}
}
row.put(xmlField, keyValues);
}
}
}
/** INTERNAL: Delete the reference objects. */
public void preDelete(DeleteObjectQuery query) throws DatabaseException, OptimisticLockException {
if (isForeignKeyRelationship()) {
return;
}
if (!this.shouldObjectModifyCascadeToParts(query)) {
return;
}
Object objects =
this.getRealCollectionAttributeValueFromObject(query.getObject(), query.getSession());
ContainerPolicy cp = this.getContainerPolicy();
// if privately-owned parts have their privately-owned sub-parts, delete them one by one;
// else delete everything in one shot
if (this.mustDeleteReferenceObjectsOneByOne()) {
for (Object iter = cp.iteratorFor(objects); cp.hasNext(iter); ) {
DeleteObjectQuery deleteQuery = new DeleteObjectQuery();
deleteQuery.setIsExecutionClone(true);
deleteQuery.setObject(cp.next(iter, query.getSession()));
deleteQuery.setCascadePolicy(query.getCascadePolicy());
query.getSession().executeQuery(deleteQuery);
}
if (!query.getSession().isUnitOfWork()) {
// This deletes any objects on the database, as the collection in memory may have been
// changed.
// This is not required for unit of work, as the update would have already deleted these
// objects,
// and the backup copy will include the same objects causing double deletes.
this.deleteReferenceObjectsLeftOnDatabase(query);
}
} else {
this.deleteAll(query);
}
}
/** Compare the attributes. Return true if they are alike. Ignore the order of the elements. */
private boolean compareAttributeValuesWithoutOrder(
Object collection1, Object collection2, AbstractSession session) {
ContainerPolicy cp = this.getContainerPolicy();
Vector vector2 = cp.vectorFor(collection2, session); // "clone" it so we can clear out the slots
for (Object iter1 = cp.iteratorFor(collection1); cp.hasNext(iter1); ) {
Object element1 = cp.next(iter1, session);
boolean found = false;
for (int i = 0; i < vector2.size(); i++) {
if (this.compareElements(element1, vector2.elementAt(i), session)) {
found = true;
vector2.setElementAt(XXX, i); // clear out the matching element
break; // matching element found - skip the rest of them
}
}
if (!found) {
return false;
}
}
// look for elements that were not in collection1
for (Enumeration stream = vector2.elements(); stream.hasMoreElements(); ) {
if (stream.nextElement() != XXX) {
return false;
}
}
return true;
}
/**
* This method will make sure that all the records privately owned by this mapping are actually
* removed. If such records are found then those are all read and removed one by one along with
* their privately owned parts.
*/
protected void deleteReferenceObjectsLeftOnDatabase(DeleteObjectQuery query)
throws DatabaseException, OptimisticLockException {
Object objects = this.readPrivateOwnedForObject(query);
// delete all these objects one by one
ContainerPolicy cp = this.getContainerPolicy();
for (Object iter = cp.iteratorFor(objects); cp.hasNext(iter); ) {
query.getSession().deleteObject(cp.next(iter, query.getSession()));
}
}
/**
* Merge changes from the source to the target object. Make the necessary removals and adds and
* map key modifications.
*/
private void mergeChangesIntoObjectWithoutOrder(
Object target, ChangeRecord changeRecord, Object source, MergeManager mergeManager) {
EISCollectionChangeRecord sdkChangeRecord = (EISCollectionChangeRecord) changeRecord;
ContainerPolicy cp = this.getContainerPolicy();
AbstractSession session = mergeManager.getSession();
Object targetCollection = null;
if (sdkChangeRecord.getOwner().isNew()) {
targetCollection = cp.containerInstance(sdkChangeRecord.getAdds().size());
} else {
targetCollection = this.getRealCollectionAttributeValueFromObject(target, session);
}
Vector removes = sdkChangeRecord.getRemoves();
Vector adds = sdkChangeRecord.getAdds();
Vector changedMapKeys = sdkChangeRecord.getChangedMapKeys();
synchronized (targetCollection) {
for (Enumeration stream = removes.elements(); stream.hasMoreElements(); ) {
Object removeElement =
this.buildRemovedElementFromChangeSet(stream.nextElement(), mergeManager);
Object targetElement = null;
for (Object iter = cp.iteratorFor(targetCollection); cp.hasNext(iter); ) {
targetElement = cp.next(iter, session);
if (this.compareElements(targetElement, removeElement, session)) {
break; // matching element found - skip the rest of them
}
}
if (targetElement != null) {
// a matching element was found, remove it
cp.removeFrom(targetElement, targetCollection, session);
}
}
for (Enumeration stream = adds.elements(); stream.hasMoreElements(); ) {
Object addElement = this.buildAddedElementFromChangeSet(stream.nextElement(), mergeManager);
cp.addInto(addElement, targetCollection, session);
}
for (Enumeration stream = changedMapKeys.elements(); stream.hasMoreElements(); ) {
Object changedMapKeyElement =
this.buildAddedElementFromChangeSet(stream.nextElement(), mergeManager);
Object originalElement =
((UnitOfWorkImpl) session).getOriginalVersionOfObject(changedMapKeyElement);
cp.removeFrom(originalElement, targetCollection, session);
cp.addInto(changedMapKeyElement, targetCollection, session);
}
}
// reset the attribute to allow for set method to re-morph changes if the collection is not
// being stored directly
this.setRealAttributeValueInObject(target, targetCollection);
}
/** INTERNAL: Insert privately owned parts */
public void preInsert(WriteObjectQuery query) throws DatabaseException, OptimisticLockException {
if (!this.isForeignKeyRelationship()) {
return;
}
if (!this.shouldObjectModifyCascadeToParts(query)) {
return;
}
// only cascade dependents in UOW
if (query.shouldCascadeOnlyDependentParts()) {
return;
}
Object objects =
this.getRealCollectionAttributeValueFromObject(query.getObject(), query.getSession());
// insert each object one by one
ContainerPolicy cp = this.getContainerPolicy();
for (Object iter = cp.iteratorFor(objects); cp.hasNext(iter); ) {
Object object = cp.next(iter, query.getSession());
if (this.isPrivateOwned()) {
// no need to set changeset here as insert is just a copy of the object anyway
InsertObjectQuery insertQuery = new InsertObjectQuery();
insertQuery.setIsExecutionClone(true);
insertQuery.setObject(object);
insertQuery.setCascadePolicy(query.getCascadePolicy());
query.getSession().executeQuery(insertQuery);
} else {
// This will happen in a unit of work or cascaded query.
// This is done only for persistence by reachability and is not required if the targets are
// in the queue anyway
// Avoid cycles by checking commit manager, this is allowed because there is no dependency.
if (!query.getSession().getCommitManager().isCommitInPreModify(object)) {
WriteObjectQuery writeQuery = new WriteObjectQuery();
writeQuery.setIsExecutionClone(true);
if (query.getSession().isUnitOfWork()) {
UnitOfWorkChangeSet uowChangeSet =
(UnitOfWorkChangeSet)
((UnitOfWorkImpl) query.getSession()).getUnitOfWorkChangeSet();
if (uowChangeSet != null) {
writeQuery.setObjectChangeSet(
(ObjectChangeSet) uowChangeSet.getObjectChangeSetForClone(object));
}
}
writeQuery.setObject(object);
writeQuery.setCascadePolicy(query.getCascadePolicy());
query.getSession().executeQuery(writeQuery);
}
}
}
}
/** INTERNAL: Used to verify whether the specified object is deleted or not. */
public boolean verifyDelete(Object object, AbstractSession session) throws DatabaseException {
if (this.isPrivateOwned()) {
Object objects = this.getRealCollectionAttributeValueFromObject(object, session);
ContainerPolicy containerPolicy = getContainerPolicy();
for (Object iter = containerPolicy.iteratorFor(objects); containerPolicy.hasNext(iter); ) {
if (!session.verifyDelete(containerPolicy.next(iter, session))) {
return false;
}
}
}
return true;
}
/** INTERNAL: */
@Override
public void writeFromObjectIntoRow(
Object object, AbstractRecord row, AbstractSession session, WriteType writeType)
throws DescriptorException {
if (this.isReadOnly()) {
return;
}
Object attributeValue = this.getAttributeValueFromObject(object);
if (attributeValue == null) {
row.put(this.getField(), null);
return;
}
ContainerPolicy cp = this.getContainerPolicy();
Vector nestedRows = new Vector(cp.sizeFor(attributeValue));
Object iter = cp.iteratorFor(attributeValue);
if (null != iter) {
while (cp.hasNext(iter)) {
Object element = cp.next(iter, session);
// convert the value - if necessary
element =
convertObjectValueToDataValue(element, session, ((XMLRecord) row).getMarshaller());
if (element == null) {
XMLNullRepresentationType nullRepresentation =
getNullPolicy().getMarshalNullRepresentation();
if (nullRepresentation == XMLNullRepresentationType.XSI_NIL) {
nestedRows.add(XMLRecord.NIL);
} else if (nullRepresentation == XMLNullRepresentationType.EMPTY_NODE) {
Node emptyNode =
XPathEngine.getInstance()
.createUnownedElement(((XMLRecord) row).getDOM(), (XMLField) field);
DOMRecord nestedRow = new DOMRecord(emptyNode);
nestedRows.add(nestedRow);
}
} else {
nestedRows.addElement(buildCompositeRow(element, session, row, writeType));
}
}
}
Object fieldValue = null;
if (!nestedRows.isEmpty()) {
fieldValue =
this.getDescriptor()
.buildFieldValueFromNestedRows(nestedRows, getStructureName(), session);
}
row.put(this.getField(), fieldValue);
}
/**
* Build and return the change record that results from comparing the two collection attributes.
* Ignore the order of the elements.
*/
private ChangeRecord compareAttributeValuesForChangeWithoutOrder(
Object cloneCollection,
Object backupCollection,
ObjectChangeSet owner,
AbstractSession session) {
ContainerPolicy cp = this.getContainerPolicy();
Vector backupVector =
cp.vectorFor(backupCollection, session); // "clone" it so we can clear out the slots
EISCollectionChangeRecord changeRecord =
new EISCollectionChangeRecord(owner, this.getAttributeName(), this.getDatabaseMapping());
for (Object cloneIter = cp.iteratorFor(cloneCollection); cp.hasNext(cloneIter); ) {
Object cloneElement = cp.next(cloneIter, session);
boolean found = false;
for (int i = 0; i < backupVector.size(); i++) {
if (this.compareElementsForChange(cloneElement, backupVector.elementAt(i), session)) {
// the clone element was found in the backup collection
found = true;
backupVector.setElementAt(XXX, i); // clear out the matching backup element
if (this.mapKeyHasChanged(cloneElement, session)) {
changeRecord.addChangedMapKeyChangeSet(
this.buildChangeSet(cloneElement, owner, session));
}
break; // matching backup element found - skip the rest of them
}
}
if (!found) {
// the clone element was not found, so it must have been added
changeRecord.addAddedChangeSet(this.buildChangeSet(cloneElement, owner, session));
}
}
for (int i = 0; i < backupVector.size(); i++) {
Object backupElement = backupVector.elementAt(i);
if (backupElement != XXX) {
// the backup element was not in the clone collection, so it must have been removed
changeRecord.addRemovedChangeSet(this.buildChangeSet(backupElement, owner, session));
}
}
if (changeRecord.hasChanges()) {
return changeRecord;
} else {
return null;
}
}
/**
* For isMany=false properties set the value to null. For isMany=true set the value to an empty
* container of the appropriate type.
*/
public void unsetDeclaredProperty(int propertyIndex) {
SDOProperty declaredProperty =
(SDOProperty) dataObject.getType().getDeclaredProperties().get(propertyIndex);
Mapping mapping = this.getJAXBMappingForProperty(declaredProperty);
if (declaredProperty.isMany()) {
ContainerMapping containerMapping = (ContainerMapping) mapping;
ContainerPolicy containerPolicy = containerMapping.getContainerPolicy();
// OLD VALUE
if (mapping.isAbstractCompositeCollectionMapping()) {
XMLCompositeCollectionMapping compositeMapping = (XMLCompositeCollectionMapping) mapping;
if (compositeMapping.getContainerAccessor() != null) {
Object oldContainer = mapping.getAttributeValueFromObject(entity);
if (oldContainer != null) {
AbstractSession session =
((JAXBContext) jaxbHelperContext.getJAXBContext())
.getXMLContext()
.getSession(entity);
Object iterator = containerPolicy.iteratorFor(oldContainer);
while (containerPolicy.hasNext(iterator)) {
Object oldValue = containerPolicy.next(iterator, session);
compositeMapping.getContainerAccessor().setAttributeValueInObject(oldValue, null);
}
}
}
}
// NEW VALUE
Object container = containerPolicy.containerInstance();
mapping.getAttributeAccessor().setAttributeValueInObject(entity, container);
} else {
// OLD VALUE
Object oldValue = mapping.getAttributeAccessor().getAttributeValueFromObject(entity);
if (mapping.isAbstractCompositeObjectMapping()) {
XMLCompositeObjectMapping compositeMapping = (XMLCompositeObjectMapping) mapping;
if (compositeMapping.getContainerAccessor() != null) {
if (oldValue != null) {
compositeMapping.getContainerAccessor().setAttributeValueInObject(oldValue, null);
}
}
}
// NEW VALUE
mapping.getAttributeAccessor().setAttributeValueInObject(entity, null);
}
}
public boolean marshal(
XPathFragment xPathFragment,
MarshalRecord marshalRecord,
Object object,
AbstractSession session,
NamespaceResolver namespaceResolver) {
if (xmlBinaryDataCollectionMapping.isReadOnly()) {
return false;
}
Object collection =
xmlBinaryDataCollectionMapping.getAttributeAccessor().getAttributeValueFromObject(object);
if (null == collection) {
return false;
}
String xopPrefix = null;
// If the field's resolver is non-null and has an entry for XOP,
// use it - otherwise, create a new resolver, set the XOP entry,
// on it, and use it instead.
// We do this to avoid setting the XOP namespace declaration on
// a given field or descriptor's resolver, as it is only required
// on the current element
if (namespaceResolver != null) {
xopPrefix = namespaceResolver.resolveNamespaceURI(XMLConstants.XOP_URL);
}
if (xopPrefix == null || namespaceResolver == null) {
xopPrefix = XMLConstants.XOP_PREFIX;
marshalRecord.getNamespaceResolver().put(xopPrefix, XMLConstants.XOP_URL);
}
ContainerPolicy cp = getContainerPolicy();
Object iterator = cp.iteratorFor(collection);
while (cp.hasNext(iterator)) {
Object objectValue = cp.next(iterator, session);
marshalSingleValue(
xPathFragment,
marshalRecord,
object,
objectValue,
session,
namespaceResolver,
ObjectMarshalContext.getInstance());
}
marshalRecord.getNamespaceResolver().removeNamespace(XMLConstants.XOP_PREFIX);
return true;
}
/**
* INTERNAL: Merge changes from the source to the target object. Simply replace the entire target
* collection.
*/
public void mergeIntoObject(
Object target, boolean isTargetUnInitialized, Object source, MergeManager mergeManager) {
ContainerPolicy cp = this.getContainerPolicy();
AbstractSession session = mergeManager.getSession();
Object sourceCollection = this.getRealCollectionAttributeValueFromObject(source, session);
Object targetCollection = cp.containerInstance(cp.sizeFor(sourceCollection));
for (Object iter = cp.iteratorFor(sourceCollection); cp.hasNext(iter); ) {
Object targetElement = this.buildElementFromElement(cp.next(iter, session), mergeManager);
cp.addInto(targetElement, targetCollection, session);
}
// reset the attribute to allow for set method to re-morph changes if the collection is not
// being stored directly
this.setRealAttributeValueInObject(target, targetCollection);
}
/**
* INTERNAL: Execute the query. If there are cached results return those. This must override the
* super to support result caching.
*
* @param session - the session in which the receiver will be executed.
* @return An object or vector, the result of executing the query.
* @exception DatabaseException - an error has occurred on the database
*/
public Object execute(AbstractSession session, AbstractRecord row) throws DatabaseException {
if (shouldCacheQueryResults()) {
if (getContainerPolicy().overridesRead()) {
throw QueryException.cannotCacheCursorResultsOnQuery(this);
}
if (shouldConformResultsInUnitOfWork()) {
throw QueryException.cannotConformAndCacheQueryResults(this);
}
if (isPrepared()) { // only prepared queries can have cached results.
Object queryResults = getQueryResults(session, row, true);
if (queryResults != null) {
if (QueryMonitor.shouldMonitor()) {
QueryMonitor.incrementReadAllHits(this);
}
// bug6138532 - check for "cached no results" (InvalidObject singleton) in query
// results, and return an empty container instance as configured
if (queryResults == InvalidObject.instance) {
return getContainerPolicy().containerInstance(0);
}
Collection results = (Collection) queryResults;
if (session.isUnitOfWork()) {
ContainerPolicy policy = getContainerPolicy();
Object resultCollection = policy.containerInstance(results.size());
Object iterator = policy.iteratorFor(results);
while (policy.hasNext(iterator)) {
Object result =
((UnitOfWorkImpl) session)
.registerExistingObject(policy.next(iterator, session), this.descriptor);
policy.addInto(result, resultCollection, session);
}
return resultCollection;
}
return results;
}
}
}
if (QueryMonitor.shouldMonitor()) {
QueryMonitor.incrementReadAllMisses(this);
}
return super.execute(session, row);
}
/** INTERNAL: Delete the reference objects. */
@Override
public void postDelete(DeleteObjectQuery query)
throws DatabaseException, OptimisticLockException {
if (!isForeignKeyRelationship()) {
return;
}
if (!this.shouldObjectModifyCascadeToParts(query)) {
return;
}
Object referenceObjects =
this.getRealCollectionAttributeValueFromObject(query.getObject(), query.getSession());
// if we have a custom delete all query, use it;
// otherwise, delete the reference objects one by one
if (this.hasCustomDeleteAllQuery()) {
this.deleteAll(query, referenceObjects);
} else {
ContainerPolicy cp = this.getContainerPolicy();
for (Object iter = cp.iteratorFor(referenceObjects); cp.hasNext(iter); ) {
DeleteObjectQuery deleteQuery = new DeleteObjectQuery();
deleteQuery.setIsExecutionClone(true);
deleteQuery.setObject(cp.next(iter, query.getSession()));
deleteQuery.setCascadePolicy(query.getCascadePolicy());
query.getSession().executeQuery(deleteQuery);
}
if (!query.getSession().isUnitOfWork()) {
// This deletes any objects on the database, as the collection in memory may have been
// changed.
// This is not required for unit of work, as the update would have already deleted these
// objects,
// and the backup copy will include the same objects, causing double deletes.
this.deleteReferenceObjectsLeftOnDatabase(query);
}
}
}
public void writeFromObjectIntoRow(Object object, AbstractRecord row, AbstractSession session) {
XMLRecord record = (XMLRecord) row;
XMLMarshaller marshaller = record.getMarshaller();
Object attributeValue = getAttributeValueFromObject(object);
ContainerPolicy cp = this.getContainerPolicy();
Vector elements = new Vector(cp.sizeFor(attributeValue));
XMLField field = (XMLField) getField();
NamespaceResolver resolver = field.getNamespaceResolver();
boolean isAttribute = field.getLastXPathFragment().isAttribute();
String prefix = null;
XMLField includeField = null;
if (!isAttribute) {
if (record.isXOPPackage() && !isSwaRef() && !shouldInlineBinaryData()) {
field = (XMLField) getField();
// If the field's resolver is non-null and has an entry for XOP,
// use it - otherwise, create a new resolver, set the XOP entry,
// on it, and use it instead.
// We do this to avoid setting the XOP namespace declaration on
// a given field or descriptor's resolver, as it is only required
// on the current element
if (resolver != null) {
prefix = resolver.resolveNamespaceURI(XMLConstants.XOP_URL);
}
if (prefix == null) {
prefix = XMLConstants.XOP_PREFIX; // "xop";
resolver = new NamespaceResolver();
resolver.put(prefix, XMLConstants.XOP_URL);
}
includeField = new XMLField(prefix + XMLConstants.COLON + INCLUDE + "/@href");
includeField.setNamespaceResolver(resolver);
}
}
XMLField textField = new XMLField(field.getXPath() + '/' + XMLConstants.TEXT);
textField.setNamespaceResolver(field.getNamespaceResolver());
textField.setSchemaType(field.getSchemaType());
// field = textField;
boolean inline = false;
for (Object iter = cp.iteratorFor(attributeValue); cp.hasNext(iter); ) {
Object element = cp.next(iter, session);
element = getValueToWrite(element, object, record, field, includeField, session);
if (element.getClass() == ClassConstants.ABYTE) {
inline = true;
}
if (element != null) {
elements.addElement(element);
}
}
Object fieldValue = null;
if (!elements.isEmpty()) {
fieldValue =
this.getDescriptor()
.buildFieldValueFromDirectValues(elements, elementDataTypeName, session);
}
if (inline) {
row.put(textField, fieldValue);
} else {
row.put(field, fieldValue);
}
}
/** INTERNAL: Conform the result if specified. */
protected Object conformResult(
Object result,
UnitOfWorkImpl unitOfWork,
AbstractRecord arguments,
boolean buildDirectlyFromRows) {
if (getSelectionCriteria() != null) {
ExpressionBuilder builder = getSelectionCriteria().getBuilder();
builder.setSession(unitOfWork.getRootSession(null));
builder.setQueryClass(getReferenceClass());
}
// If the query is redirected then the collection returned might no longer
// correspond to the original container policy. CR#2342-S.M.
ContainerPolicy cp;
if (getRedirector() != null) {
cp = ContainerPolicy.buildPolicyFor(result.getClass());
} else {
cp = getContainerPolicy();
}
// This code is now a great deal different... For one, registration is done
// as part of conforming. Also, this should only be called if one actually
// is conforming.
// First scan the UnitOfWork for conforming instances.
// This will walk through the entire cache of registered objects.
// Let p be objects from result not in the cache.
// Let c be objects from cache.
// Presently p intersect c = empty set, but later p subset c.
// By checking cache now doesConform will be called p fewer times.
Map indexedInterimResult =
unitOfWork.scanForConformingInstances(
getSelectionCriteria(), getReferenceClass(), arguments, this);
Cursor cursor = null;
// In the case of cursors just conform/register the initially read collection.
if (cp.isCursorPolicy()) {
cursor = (Cursor) result;
cp = ContainerPolicy.buildPolicyFor(ClassConstants.Vector_class);
// In nested UnitOfWork session might have been session of the parent.
cursor.setSession(unitOfWork);
result = cursor.getObjectCollection();
// for later incremental conforming...
cursor.setInitiallyConformingIndex(indexedInterimResult);
cursor.setSelectionCriteriaClone(getSelectionCriteria());
cursor.setTranslationRow(arguments);
}
// Now conform the result from the database.
// Remove any deleted or changed objects that no longer conform.
// Deletes will only work for simple queries, queries with or's or anyof's may not return
// correct results when untriggered indirection is in the model.
Vector fromDatabase = null;
// When building directly from rows, one of the performance benefits
// is that we no longer have to wrap and then unwrap the originals.
// result is just a vector, not a container of wrapped originals.
if (buildDirectlyFromRows) {
Vector rows = (Vector) result;
fromDatabase = new Vector(rows.size());
for (int i = 0; i < rows.size(); i++) {
Object object = rows.elementAt(i);
// null is placed in the row collection for 1-m joining to filter duplicate rows.
if (object != null) {
Object clone =
conformIndividualResult(
object,
unitOfWork,
arguments,
getSelectionCriteria(),
indexedInterimResult,
buildDirectlyFromRows);
if (clone != null) {
fromDatabase.addElement(clone);
}
}
}
} else {
fromDatabase = new Vector(cp.sizeFor(result));
AbstractSession sessionToUse = unitOfWork.getParent();
for (Object iter = cp.iteratorFor(result); cp.hasNext(iter); ) {
Object object = cp.next(iter, sessionToUse);
Object clone =
conformIndividualResult(
object,
unitOfWork,
arguments,
getSelectionCriteria(),
indexedInterimResult,
buildDirectlyFromRows);
if (clone != null) {
fromDatabase.addElement(clone);
}
}
}
// Now add the unwrapped conforming instances into an appropriate container.
// Wrapping is done automatically.
// Make sure a vector of exactly the right size is returned.
Object conformedResult =
cp.containerInstance(indexedInterimResult.size() + fromDatabase.size());
Object eachClone;
for (Iterator enumtr = indexedInterimResult.values().iterator(); enumtr.hasNext(); ) {
eachClone = enumtr.next();
cp.addInto(eachClone, conformedResult, unitOfWork);
}
for (Enumeration enumtr = fromDatabase.elements(); enumtr.hasMoreElements(); ) {
eachClone = enumtr.nextElement();
cp.addInto(eachClone, conformedResult, unitOfWork);
}
if (cursor != null) {
cursor.setObjectCollection((Vector) conformedResult);
// For nested UOW must copy all in object collection to
// initiallyConformingIndex, as some of these could have been from
// the parent UnitOfWork.
if (unitOfWork.isNestedUnitOfWork()) {
for (Enumeration enumtr = cursor.getObjectCollection().elements();
enumtr.hasMoreElements(); ) {
Object clone = enumtr.nextElement();
indexedInterimResult.put(clone, clone);
}
}
return cursor;
} else {
return conformedResult;
}
}
/**
* INTERNAL: All objects queried via a UnitOfWork get registered here. If the query went to the
* database.
*
* <p>Involves registering the query result individually and in totality, and hence refreshing /
* conforming is done here.
*
* @param result may be collection (read all) or an object (read one), or even a cursor. If in
* transaction the shared cache will be bypassed, meaning the result may not be originals from
* the parent but raw database rows.
* @param unitOfWork the unitOfWork the result is being registered in.
* @param arguments the original arguments/parameters passed to the query execution. Used by
* conforming
* @param buildDirectlyFromRows If in transaction must construct a registered result from raw
* database rows.
* @return the final (conformed, refreshed, wrapped) UnitOfWork query result
*/
public Object registerResultInUnitOfWork(
Object result,
UnitOfWorkImpl unitOfWork,
AbstractRecord arguments,
boolean buildDirectlyFromRows) {
// For bug 2612366: Conforming results in UOW extremely slow.
// Replacing results with registered versions in the UOW is a part of
// conforming and is now done while conforming to maximize performance.
if (shouldConformResultsInUnitOfWork()
|| this.descriptor.shouldAlwaysConformResultsInUnitOfWork()) {
return conformResult(result, unitOfWork, arguments, buildDirectlyFromRows);
}
// When building directly from rows, one of the performance benefits
// is that we no longer have to wrap and then unwrap the originals.
// result is just a vector, not a collection of wrapped originals.
// Also for cursors the initial connection is automatically registered.
if (buildDirectlyFromRows) {
List<AbstractRecord> rows = (List<AbstractRecord>) result;
ContainerPolicy cp = getContainerPolicy();
int size = rows.size();
Object clones = cp.containerInstance(size);
for (int index = 0; index < size; index++) {
AbstractRecord row = rows.get(index);
// null is placed in the row collection for 1-m joining to filter duplicate rows.
if (row != null) {
Object clone = buildObject(row);
cp.addInto(clone, clones, unitOfWork, row, this);
}
}
return clones;
}
ContainerPolicy cp;
Cursor cursor = null;
// If the query is redirected then the collection returned might no longer
// correspond to the original container policy. CR#2342-S.M.
if (getRedirector() != null) {
cp = ContainerPolicy.buildPolicyFor(result.getClass());
} else {
cp = getContainerPolicy();
}
// In the case of cursors just register the initially read collection.
if (cp.isCursorPolicy()) {
cursor = (Cursor) result;
// In nested UnitOfWork session might have been session of the parent.
cursor.setSession(unitOfWork);
cp = ContainerPolicy.buildPolicyFor(ClassConstants.Vector_class);
result = cursor.getObjectCollection();
}
Object clones = cp.containerInstance(cp.sizeFor(result));
AbstractSession sessionToUse = unitOfWork.getParent();
for (Object iter = cp.iteratorFor(result); cp.hasNext(iter); ) {
Object object = cp.next(iter, sessionToUse);
Object clone = registerIndividualResult(object, unitOfWork, this.joinedAttributeManager);
cp.addInto(clone, clones, unitOfWork);
}
if (cursor != null) {
cursor.setObjectCollection((Vector) clones);
return cursor;
} else {
return clones;
}
}