/**
* INTERNAL: Return the classification for the field contained in the mapping. This is used to
* convert the row value to a consistent java value.
*/
@Override
public Class getFieldClassification(DatabaseField fieldToClassify) {
if ((getTypeField() != null) && (fieldToClassify.equals(getTypeField()))) {
return getTypeField().getType();
}
String queryKey = (String) getSourceToTargetQueryKeyNames().get(fieldToClassify);
if (queryKey == null) {
return null;
}
// Search any of the implementor descriptors for a mapping for the query-key.
Iterator iterator =
getReferenceDescriptor().getInterfacePolicy().getChildDescriptors().iterator();
if (iterator.hasNext()) {
ClassDescriptor firstChild = (ClassDescriptor) iterator.next();
DatabaseMapping mapping = firstChild.getObjectBuilder().getMappingForAttributeName(queryKey);
if ((mapping != null) && (mapping.isDirectToFieldMapping())) {
return ((AbstractDirectMapping) mapping).getAttributeClassification();
}
QueryKey targetQueryKey = firstChild.getQueryKeyNamed(queryKey);
if ((targetQueryKey != null) && (targetQueryKey.isDirectQueryKey())) {
return firstChild
.getObjectBuilder()
.getFieldClassification(((DirectQueryKey) targetQueryKey).getField());
}
}
return null;
}
/** 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);
}
public Object getObjectForUpdate(
Session session,
Object objectToUpdateBeforeChange,
Object objectToUpdateAfterChange,
boolean useUOW) {
ClassDescriptor desc = session.getClassDescriptor(objectToUpdateBeforeChange);
Record rowBeforeChange =
desc.getObjectBuilder()
.buildRow(objectToUpdateBeforeChange, (AbstractSession) session, WriteType.UPDATE);
Record rowAfterChange =
desc.getObjectBuilder()
.buildRow(objectToUpdateAfterChange, (AbstractSession) session, WriteType.UPDATE);
Record rowChange = new DatabaseRecord();
getChange(
rowChange,
session,
objectToUpdateBeforeChange,
objectToUpdateAfterChange,
desc,
useUOW,
WriteType.UPDATE);
Record rowReturn = getRowForUpdate(rowChange);
if (rowReturn != null && !rowReturn.isEmpty()) {
Record row = new DatabaseRecord(rowAfterChange.size());
row.putAll(rowAfterChange);
row.putAll(rowReturn);
return readObjectFromRow(session, desc, row);
} else {
return objectToUpdateAfterChange;
}
}
/**
* 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;
}
@Override
protected Object buildCompositeObject(
ClassDescriptor descriptor,
AbstractRecord nestedRow,
ObjectBuildingQuery query,
CacheKey parentCacheKey,
JoinedAttributeManager joinManger,
AbstractSession targetSession) {
return descriptor.getObjectBuilder().buildObject(query, nestedRow, joinManger);
}
@Override
protected Object buildCompositeObject(
ClassDescriptor descriptor,
AbstractRecord nestedRow,
ObjectBuildingQuery query,
CacheKey parentsCacheKey,
JoinedAttributeManager joinManager,
AbstractSession targetSession) {
if (((EISDescriptor) descriptor).getDataFormat() == EISDescriptor.XML) {
return descriptor.getObjectBuilder().buildObject(query, nestedRow, joinManager);
} else {
Object element = descriptor.getObjectBuilder().buildNewInstance();
descriptor
.getObjectBuilder()
.buildAttributesIntoObject(
element, parentsCacheKey, nestedRow, query, joinManager, false, targetSession);
return element;
}
}
/** INTERNAL: Get a value from the object and set that in the respective field of the row. */
@Override
public void writeFromObjectIntoRowForWhereClause(
ObjectLevelModifyQuery query, AbstractRecord record) {
if (isReadOnly()) {
return;
}
Object object;
if (query.isDeleteObjectQuery()) {
object = query.getObject();
} else {
object = query.getBackupClone();
}
Object referenceObject = getRealAttributeValueFromObject(object, query.getSession());
if (referenceObject == null) {
writeFromNullObjectIntoRow(record);
} else {
if (isForeignKeyRelationship()) {
Enumeration sourceFields = getForeignKeyFields().elements();
ClassDescriptor descriptor = query.getSession().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, query.getSession());
record.put(sourceKey, referenceValue);
}
}
if (getTypeField() != null) {
record.put(getTypeField(), getTypeForImplementor(referenceObject.getClass()));
}
}
}
@Override
protected Object buildCompositeObject(
ClassDescriptor descriptor,
AbstractRecord nestedRow,
ObjectBuildingQuery query,
CacheKey parentCacheKey,
JoinedAttributeManager joinManager,
AbstractSession targetSession) {
Object element = descriptor.getObjectBuilder().buildNewInstance();
descriptor
.getObjectBuilder()
.buildAttributesIntoObject(
element,
parentCacheKey,
nestedRow,
query,
joinManager,
query.getExecutionFetchGroup(descriptor),
false,
targetSession);
return element;
}
/**
* INTERNAL: Retrieve the target object's primary key value that is mapped to a given source xpath
* (in the source-target key field association list).
*
* @param targetObject - the reference class instance that holds the required pk value
* @param xmlFld
* @param session
* @return null if the target object is null, the reference class is null, or a primary key field
* name does not exist on the reference descriptor that matches the target field name -
* otherwise, return the associated primary key value
*/
public Object buildFieldValue(Object targetObject, XMLField xmlFld, AbstractSession session) {
if (targetObject == null || getReferenceClass() == null) {
return null;
}
ClassDescriptor descriptor = getReferenceDescriptor();
ObjectBuilder objectBuilder = descriptor.getObjectBuilder();
Vector pks = objectBuilder.extractPrimaryKeyFromObject(targetObject, session);
XMLField tgtXMLField = (XMLField) getSourceToTargetKeyFieldAssociations().get(xmlFld);
int idx = descriptor.getPrimaryKeyFields().indexOf(tgtXMLField);
if (idx == -1) {
return null;
}
return pks.get(idx);
}
/**
* 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: This method marks the object as changed. This method is only called by EclipseLink
*/
public void internalPropertyChange(PropertyChangeEvent evt) {
if (evt.getNewValue() == evt.getOldValue()) {
return;
}
DatabaseMapping mapping =
descriptor.getObjectBuilder().getMappingForAttributeName(evt.getPropertyName());
// Bug#4127952 Throw an exception indicating there is no mapping for the property name.
if (mapping == null) {
throw ValidationException.wrongPropertyNameInChangeEvent(
owner.getClass(), evt.getPropertyName());
}
if (mapping instanceof AbstractDirectMapping
|| mapping instanceof AbstractTransformationMapping) {
// If both newValue and oldValue are null, or newValue is not null and newValue equals
// oldValue, don't build ChangeRecord
if (((evt.getNewValue() == null) && (evt.getOldValue() == null))
|| ((evt.getNewValue() != null) && (evt.getNewValue()).equals(evt.getOldValue()))) {
return;
}
}
super.internalPropertyChange(evt);
if (uow.getUnitOfWorkChangeSet() == null) {
uow.setUnitOfWorkChangeSet(new UnitOfWorkChangeSet(uow));
}
if (objectChangeSet == null) { // only null if new or if in a new UOW
// add to tracker list to prevent GC of clone if using weak references
// put it in here so that it only occurs on the 1st change for a particular UOW
uow.addToChangeTrackedHardList(owner);
objectChangeSet =
getDescriptor()
.getObjectBuilder()
.createObjectChangeSet(
owner, (UnitOfWorkChangeSet) uow.getUnitOfWorkChangeSet(), false, uow);
}
if (evt.getClass().equals(ClassConstants.PropertyChangeEvent_Class)) {
mapping.updateChangeRecord(
evt.getSource(), evt.getNewValue(), evt.getOldValue(), objectChangeSet, getUnitOfWork());
} else if (evt.getClass().equals(ClassConstants.CollectionChangeEvent_Class)
|| (evt.getClass().equals(ClassConstants.MapChangeEvent_Class))) {
mapping.updateCollectionChangeRecord(
(CollectionChangeEvent) evt, objectChangeSet, getUnitOfWork());
} else {
throw ValidationException.wrongChangeEvent(evt.getClass());
}
}
// 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());
}
public Object getObjectForInsert(Session session, Object objectToInsert) {
ClassDescriptor desc = session.getClassDescriptor(objectToInsert);
Record rowToInsert =
desc.getObjectBuilder()
.buildRow(objectToInsert, (AbstractSession) session, WriteType.INSERT);
Record rowReturn = getRowForInsert(rowToInsert);
if (rowReturn != null && !rowReturn.isEmpty()) {
Record row = new DatabaseRecord(rowToInsert.size());
row.putAll(rowToInsert);
row.putAll(rowReturn);
return readObjectFromRow(session, desc, row);
} else {
return objectToInsert;
}
}
protected AbstractRecord buildCompositeRowForDescriptor(
ClassDescriptor classDesc,
Object attributeValue,
AbstractSession session,
XMLRecord parentRow,
WriteType writeType) {
XMLObjectBuilder objectBuilder = (XMLObjectBuilder) classDesc.getObjectBuilder();
XMLRecord child =
(XMLRecord)
objectBuilder.createRecordFor(attributeValue, (XMLField) getField(), parentRow, this);
child.setNamespaceResolver(parentRow.getNamespaceResolver());
child.setSession(session);
objectBuilder.buildIntoNestedRow(
child,
attributeValue,
session,
(XMLDescriptor) getReferenceDescriptor(),
(XMLField) getField());
return child;
}
protected Object readObjectFromRow(Session session, ClassDescriptor desc, Record row) {
if (desc.hasInheritance()) {
Class newClass =
desc.getInheritancePolicy().classFromRow((DatabaseRecord) row, (AbstractSession) session);
desc = session.getClassDescriptor(newClass);
}
Object object = desc.getObjectBuilder().buildNewInstance();
ReadObjectQuery query = new ReadObjectQuery();
query.setSession((AbstractSession) session);
for (Enumeration mappings = desc.getMappings().elements(); mappings.hasMoreElements(); ) {
DatabaseMapping mapping = (DatabaseMapping) mappings.nextElement();
mapping.readFromRowIntoObject(
(DatabaseRecord) row,
query.getJoinedAttributeManager(),
object,
null,
query,
query.getSession(),
true);
}
return object;
}
protected boolean compare(int i) {
if (objectVectors[i] == null) {
return false;
}
Vector currentVector = getDbSession().readAllObjects(classes[i]);
if (currentVector.size() != objectVectors[i].size()) {
return false;
}
ClassDescriptor descriptor = getDbSession().getDescriptor(classes[i]);
for (int j = 0; j < currentVector.size(); j++) {
Object obj1 = objectVectors[i].elementAt(j);
Object obj2 = currentVector.elementAt(j);
if (!descriptor
.getObjectBuilder()
.compareObjects(
obj1,
obj2,
(org.eclipse.persistence.internal.sessions.AbstractSession) getDbSession())) {
return false;
}
}
return true;
}
/** @return DatabaseMapping for given attribute name */
private DatabaseMapping getMappingForAttributeName(String attributeName) {
return descriptor.getObjectBuilder().getMappingForAttributeName(attributeName);
}
/**
* INTERNAL: Check if existence can be determined without going to the database. Note that custom
* query check is not require for does exist as the custom is always used. Used by unit of work,
* and will return null if checkDatabaseIfInvalid is set and the cachekey is invalidated
*/
public Object checkEarlyReturn(
Object object, Vector primaryKey, AbstractSession session, AbstractRecord translationRow) {
// For bug 3136413/2610803 building the selection criteria from an EJBQL string or
// an example object is done just in time.
buildSelectionCriteria(session);
// Return false on null since it can't exist. Little more done in case PK not set in the query
if (object == null) {
return Boolean.FALSE;
}
ClassDescriptor descriptor = session.getDescriptor(object.getClass());
if (primaryKey == null) {
primaryKey = getPrimaryKey();
if (primaryKey == null) {
primaryKey =
descriptor.getObjectBuilder().extractPrimaryKeyFromObject(object, session, true);
}
}
if ((primaryKey == null) || (primaryKey.contains(null))) {
return Boolean.FALSE;
}
// Need to do the cache check first if flag set or if we should check the cache only for
// existence.
if ((shouldCheckCacheForDoesExist() || this.checkCacheFirst)
&& !descriptor.isDescriptorForInterface()) {
// If this is a UOW and modification queries have been executed, the cache cannot be trusted.
if (this.checkDatabaseIfInvalid
&& (session.isUnitOfWork() && ((UnitOfWorkImpl) session).shouldReadFromDB())) {
return null;
}
CacheKey cacheKey;
Class objectClass = object.getClass();
AbstractSession tempSession = session;
while (tempSession.isUnitOfWork()) { // could be nested lets check all UOWs
cacheKey =
tempSession
.getIdentityMapAccessorInstance()
.getCacheKeyForObjectForLock(primaryKey, objectClass, descriptor);
if (cacheKey != null) {
// If in the UOW cache it can't be invalid.
return Boolean.TRUE;
}
tempSession = ((UnitOfWorkImpl) tempSession).getParent();
}
// Did not find it registered in UOW so check main cache and check for invalidation.
cacheKey =
tempSession
.getIdentityMapAccessorInstance()
.getCacheKeyForObject(primaryKey, objectClass, descriptor);
if ((cacheKey != null)) {
// Assume that if there is a cachekey, object exists.
if (this.checkDatabaseIfInvalid) {
checkDescriptor(object, session);
if (this.descriptor
.getCacheInvalidationPolicy()
.isInvalidated(cacheKey, System.currentTimeMillis())) {
return null;
}
}
Object objectFromCache = cacheKey.getObject();
if ((session.isUnitOfWork()) && ((UnitOfWorkImpl) session).wasDeleted(objectFromCache)) {
if (shouldCheckCacheForDoesExist()) {
return Boolean.FALSE;
}
} else {
return Boolean.TRUE;
}
} else if (shouldCheckCacheForDoesExist()) {
// We know its not in cache, and a checkcache policy so return false.
return Boolean.FALSE;
}
}
// Check if we have to assume that the object does not exist.
if (shouldAssumeNonExistenceForDoesExist()) {
return Boolean.FALSE;
}
// Check to see if we only need to check that the object contains a primary key.
if (shouldAssumeExistenceForDoesExist()) {
return Boolean.TRUE;
}
return null;
}
/**
* INTERNAL: Build and return the nested rows from the specified field value. This method allows
* the field value to be an ARRAY containing other structures such as arrays or Struct, or direct
* values.
*/
public static Object buildContainerFromArray(
Array fieldValue, ObjectRelationalDatabaseField arrayField, AbstractSession session)
throws DatabaseException {
if (arrayField.getType() == null) {
return fieldValue;
}
Object[] objects = null;
try {
objects = (Object[]) fieldValue.getArray();
} catch (java.sql.SQLException ex) {
throw DatabaseException.sqlException(ex, session, false);
}
if (objects == null) {
return null;
}
boolean isNestedStructure = false;
ObjectRelationalDataTypeDescriptor ord = null;
DatabaseField nestedType = null;
if (arrayField != null) {
nestedType = arrayField.getNestedTypeField();
if ((nestedType != null) && nestedType.getSqlType() == Types.STRUCT) {
ClassDescriptor descriptor = session.getDescriptor(nestedType.getType());
if ((descriptor != null) && (descriptor.isObjectRelationalDataTypeDescriptor())) {
// this is used to convert non-null objects passed through stored procedures and custom
// SQL to structs
ord = (ObjectRelationalDataTypeDescriptor) descriptor;
}
} else if ((nestedType != null) && (nestedType instanceof ObjectRelationalDatabaseField)) {
isNestedStructure = true;
}
}
// handle ARRAY conversions
ReadObjectQuery query = new ReadObjectQuery();
query.setSession(session);
ContainerPolicy cp = ContainerPolicy.buildPolicyFor(arrayField.getType());
Object container = cp.containerInstance(objects.length);
for (int i = 0; i < objects.length; i++) {
Object arrayValue = objects[i];
if (arrayValue == null) {
return null;
}
if (ord != null) {
AbstractRecord nestedRow = ord.buildRowFromStructure((Struct) arrayValue);
ClassDescriptor descriptor = ord;
if (descriptor.hasInheritance()) {
Class newElementClass =
descriptor.getInheritancePolicy().classFromRow(nestedRow, session);
if (!descriptor.getJavaClass().equals(newElementClass)) {
descriptor = session.getDescriptor(newElementClass);
if (descriptor == null) {
descriptor = ord;
}
}
}
arrayValue = descriptor.getObjectBuilder().buildNewInstance();
descriptor
.getObjectBuilder()
.buildAttributesIntoObject(arrayValue, nestedRow, query, null, false);
} else if (isNestedStructure && (arrayValue instanceof Array)) {
arrayValue =
buildContainerFromArray(
(Array) arrayValue, (ObjectRelationalDatabaseField) nestedType, session);
}
cp.addInto(arrayValue, container, session);
}
return container;
}
