/** Delete all of the objects with the matching class. */
public void deleteAllObjects(Class theClass, List objects, AbstractSession session) {
ClassDescriptor descriptor = null;
if (((UnitOfWorkImpl) session).shouldOrderUpdates()) { // bug 331064 - Sort the delete order
objects = sort(theClass, objects);
}
int size = objects.size();
for (int index = 0; index < size; index++) {
Object objectToDelete = objects.get(index);
if (objectToDelete.getClass() == theClass) {
if (descriptor == null) {
descriptor = session.getDescriptor(theClass);
}
// PERF: Get the descriptor query, to avoid extra query creation.
DeleteObjectQuery deleteQuery = descriptor.getQueryManager().getDeleteQuery();
if (deleteQuery == null) {
deleteQuery = new DeleteObjectQuery();
deleteQuery.setDescriptor(descriptor);
} else {
// Ensure original query has been prepared.
deleteQuery.checkPrepare(session, deleteQuery.getTranslationRow());
deleteQuery = (DeleteObjectQuery) deleteQuery.clone();
}
deleteQuery.setIsExecutionClone(true);
deleteQuery.setObject(objectToDelete);
session.executeQuery(deleteQuery);
}
}
}
/** INTERNAL: Get a value from the object and set that in the respective field of the row. */
@Override
public Object valueFromObject(Object object, DatabaseField field, AbstractSession session) {
// First check if the value can be obtained from the value holder's row.
AbstractRecord referenceRow =
getIndirectionPolicy().extractReferenceRow(getAttributeValueFromObject(object));
if (referenceRow != null) {
Object value = referenceRow.get(field);
// Must ensure the classification to get a cache hit.
try {
value = session.getDatasourcePlatform().convertObject(value, getFieldClassification(field));
} catch (ConversionException e) {
throw ConversionException.couldNotBeConverted(this, getDescriptor(), e);
}
return value;
}
// 2.5.1.6 PWK. added to support batch reading on variable one to ones
Object referenceObject = getRealAttributeValueFromObject(object, session);
String queryKeyName = (String) getSourceToTargetQueryKeyNames().get(field);
ClassDescriptor objectDescriptor = session.getDescriptor(referenceObject.getClass());
DatabaseField targetField =
objectDescriptor.getObjectBuilder().getTargetFieldForQueryKeyName(queryKeyName);
if (targetField == null) {
return null;
}
return objectDescriptor
.getObjectBuilder()
.extractValueFromObjectForField(referenceObject, targetField, session);
}
/**
* Commit all of the objects of the class type in the change set. This allows for the order of the
* classes to be processed optimally.
*/
protected void commitNewObjectsForClassWithChangeSet(
UnitOfWorkChangeSet uowChangeSet, Class theClass) {
Map<ObjectChangeSet, ObjectChangeSet> newObjectChangesList =
uowChangeSet.getNewObjectChangeSets().get(theClass);
if (newObjectChangesList != null) { // may be no changes for that class type.
AbstractSession session = getSession();
ClassDescriptor descriptor = session.getDescriptor(theClass);
List<ObjectChangeSet> newChangeSets = new ArrayList(newObjectChangesList.values());
int size = newChangeSets.size();
for (int index = 0; index < size; index++) {
ObjectChangeSet changeSetToWrite = newChangeSets.get(index);
Object objectToWrite = changeSetToWrite.getUnitOfWorkClone();
if (!isProcessedCommit(objectToWrite)) {
// PERF: Get the descriptor query, to avoid extra query creation.
InsertObjectQuery commitQuery = descriptor.getQueryManager().getInsertQuery();
if (commitQuery == null) {
commitQuery = new InsertObjectQuery();
commitQuery.setDescriptor(descriptor);
} else {
// Ensure original query has been prepared.
commitQuery.checkPrepare(session, commitQuery.getTranslationRow());
commitQuery = (InsertObjectQuery) commitQuery.clone();
}
commitQuery.setIsExecutionClone(true);
commitQuery.setObjectChangeSet(changeSetToWrite);
commitQuery.setObject(objectToWrite);
commitQuery.cascadeOnlyDependentParts();
commitQuery.setModifyRow(null);
session.executeQuery(commitQuery);
}
uowChangeSet.putNewObjectInChangesList(changeSetToWrite, session);
}
}
}
/**
* INTERNAL: Compare the references of the two objects are the same, not the objects themselves.
* Used for independent relationships. This is used for testing and validation purposes.
*
* <p>Must get separate fields for the objects because we may be adding a different class to the
* attribute because of the interface
*/
@Override
protected boolean compareObjectsWithoutPrivateOwned(
Object firstObject, Object secondObject, AbstractSession session) {
Object firstPrivateObject = getRealAttributeValueFromObject(firstObject, session);
Object secondPrivateObject = getRealAttributeValueFromObject(secondObject, session);
if ((firstPrivateObject == null) && (secondPrivateObject == null)) {
return true;
}
if ((firstPrivateObject == null) || (secondPrivateObject == null)) {
return false;
}
if (firstPrivateObject.getClass() != secondPrivateObject.getClass()) {
return false;
}
Iterator targetKeys = getSourceToTargetQueryKeyNames().values().iterator();
ClassDescriptor descriptor = session.getDescriptor(firstPrivateObject.getClass());
ClassDescriptor descriptor2 = session.getDescriptor(secondPrivateObject.getClass());
while (targetKeys.hasNext()) {
String queryKey = (String) targetKeys.next();
DatabaseField field = descriptor.getObjectBuilder().getFieldForQueryKeyName(queryKey);
Object firstObjectField =
descriptor
.getObjectBuilder()
.extractValueFromObjectForField(firstPrivateObject, field, session);
DatabaseField field2 = descriptor2.getObjectBuilder().getFieldForQueryKeyName(queryKey);
Object secondObjectField =
descriptor2
.getObjectBuilder()
.extractValueFromObjectForField(secondPrivateObject, field2, session);
if (!((firstObjectField == null) && (secondObjectField == null))) {
if ((firstObjectField == null) || (secondObjectField == null)) {
return false;
}
if (!firstObjectField.equals(secondObjectField)) {
return false;
}
}
}
return true;
}
// bug 331064 - Sort the delete order based on PKs.
private List sort(Class theClass, List objects) {
ClassDescriptor descriptor = session.getDescriptor(theClass);
org.eclipse.persistence.internal.descriptors.ObjectBuilder objectBuilder =
descriptor.getObjectBuilder();
int size = objects.size();
TreeMap sortedObjects = new TreeMap();
for (int index = 0; index < size; index++) {
Object objectToDelete = objects.get(index);
if (objectToDelete.getClass() == theClass) {
sortedObjects.put(
objectBuilder.extractPrimaryKeyFromObject(objectToDelete, session), objectToDelete);
}
}
return new ArrayList(sortedObjects.values());
}
/** INTERNAL: Initialize the mapping. */
public void initialize(AbstractSession session) throws DescriptorException {
setReferenceDescriptor(session.getDescriptor(getReferenceClass()));
if (referenceDescriptor == null) {
throw DescriptorException.descriptorIsMissing(getReferenceClass().getName(), this);
}
// For bug 2730536 convert the field to be an ObjectRelationalDatabaseField.
ObjectRelationalDatabaseField field = (ObjectRelationalDatabaseField) getField();
field.setSqlType(java.sql.Types.REF);
if (referenceDescriptor instanceof ObjectRelationalDataTypeDescriptor) {
field.setSqlTypeName(
((ObjectRelationalDataTypeDescriptor) referenceDescriptor).getStructureName());
}
setField(getDescriptor().buildField(getField()));
setFields(collectFields());
// Ref mapping requires native connection in WLS as the Ref is wrapped.
getDescriptor().setIsNativeConnectionRequired(true);
}
/**
* Commit changed of the objects of the class type in the change set. This allows for the order of
* the classes to be processed optimally.
*/
protected void commitChangedObjectsForClassWithChangeSet(
UnitOfWorkChangeSet uowChangeSet, Class theClass) {
Map<ObjectChangeSet, ObjectChangeSet> objectChangesList =
uowChangeSet.getObjectChanges().get(theClass);
if (objectChangesList != null) { // may be no changes for that class type.
ClassDescriptor descriptor = null;
AbstractSession session = getSession();
Collection<ObjectChangeSet> changes = objectChangesList.values();
if (((UnitOfWorkImpl) session).shouldOrderUpdates()) {
changes = new ArrayList(objectChangesList.values());
Collections.sort((List) changes);
}
for (ObjectChangeSet changeSetToWrite : changes) {
Object objectToWrite = changeSetToWrite.getUnitOfWorkClone();
if (descriptor == null) {
descriptor = session.getDescriptor(objectToWrite);
}
if (!isProcessedCommit(objectToWrite)) {
// Commit and resume on failure can cause a new change set to be in existing, so need to
// check here.
WriteObjectQuery commitQuery = null;
if (changeSetToWrite.isNew()) {
commitQuery = new InsertObjectQuery();
} else {
commitQuery = new UpdateObjectQuery();
}
commitQuery.setIsExecutionClone(true);
commitQuery.setDescriptor(descriptor);
commitQuery.setObjectChangeSet(changeSetToWrite);
commitQuery.setObject(objectToWrite);
commitQuery.cascadeOnlyDependentParts();
// removed checking session type to set cascade level
// will always be a unitOfWork so we need to cascade dependent parts
session.executeQuery(commitQuery);
}
}
}
}
/**
* INTERNAL: Get a value from the object and set that in the respective field of the row. If the
* mapping id target foreign key, you must only write the type into the roe, the rest will be
* updated when the object itself is written
*/
@Override
public void writeFromObjectIntoRowWithChangeRecord(
ChangeRecord changeRecord, AbstractRecord record, AbstractSession session) {
if (isReadOnly()) {
return;
}
ObjectChangeSet changeSet =
(ObjectChangeSet) ((ObjectReferenceChangeRecord) changeRecord).getNewValue();
if (changeSet == null) {
writeFromNullObjectIntoRow(record);
} else {
Object referenceObject = changeSet.getUnitOfWorkClone();
if (isForeignKeyRelationship()) {
Enumeration sourceFields = getForeignKeyFields().elements();
ClassDescriptor descriptor = session.getDescriptor(referenceObject.getClass());
while (sourceFields.hasMoreElements()) {
DatabaseField sourceKey = (DatabaseField) sourceFields.nextElement();
String targetQueryKey = (String) getSourceToTargetQueryKeyNames().get(sourceKey);
DatabaseField targetKeyField =
descriptor.getObjectBuilder().getFieldForQueryKeyName(targetQueryKey);
if (targetKeyField == null) {
throw DescriptorException.variableOneToOneMappingIsNotDefinedProperly(
this, descriptor, targetQueryKey);
}
Object referenceValue =
descriptor
.getObjectBuilder()
.extractValueFromObjectForField(referenceObject, targetKeyField, session);
record.put(sourceKey, referenceValue);
}
}
if (getTypeField() != null) {
record.put(getTypeField(), getTypeForImplementor(referenceObject.getClass()));
}
}
}
/** INTERNAL: Build and return a change set for the specified element. */
public Object buildChangeSet(Object element, ObjectChangeSet owner, AbstractSession session) {
ObjectBuilder objectBuilder = session.getDescriptor(element).getObjectBuilder();
return objectBuilder.createObjectChangeSet(
element, (UnitOfWorkChangeSet) owner.getUOWChangeSet(), session);
}
/**
* INTERNAL: Return a descriptor for the target of this mapping For normal
* ObjectReferenceMappings, we return the reference descriptor. For a VariableOneToOneMapping, the
* reference descriptor is often a descriptor for an interface and does not contain adequate
* information. As a result, we look up the descriptor for the specific class we are looking for
* Bug 2612571
*/
@Override
public ClassDescriptor getDescriptorForTarget(Object targetObject, AbstractSession session) {
return session.getDescriptor(targetObject);
}