/**
* INTERNAL: this returns a single expression to represent the join from the main table to all
* child descriptor tables Only if outer joins should be printed in the where clause
*
* @return Expression
*/
public Expression getTreatCriteria() {
if (getDescriptor() == null) {
return null;
}
// need to build this using just the multiple tables on this descriptor not included in the
// parent's join expression
Expression criteria = null;
if (getSession().getPlatform().shouldPrintOuterJoinInWhereClause()) {
Vector tables = getDescriptor().getTables(); // This child's tables
ClassDescriptor parentDescriptor = this.typeExpressionBase.getDescriptor();
int tablesSize = tables.size();
if (parentDescriptor.hasInheritance()
&& parentDescriptor.getInheritancePolicy().hasMultipleTableChild()) {
// look up the joins from the parent descriptor to our tables.
for (int i = 0; i < tablesSize; i++) {
DatabaseTable table = (DatabaseTable) tables.elementAt(i);
Expression joinExpression =
parentDescriptor.getInheritancePolicy().getChildrenTablesJoinExpressions().get(table);
// Some of our tables might be the in our parent as well, so ignore the lack of a
// joinExpression
if (joinExpression != null) {
joinExpression = this.baseExpression.twist(joinExpression, this);
if (shouldUseOuterJoin()) {
joinExpression = joinExpression.convertToUseOuterJoin();
}
criteria = joinExpression.and(criteria);
}
}
}
}
return criteria;
}
/** INTERNAL: */
@Override
public List<DatabaseField> getSelectionFields(ReadQuery query) {
if (getDescriptor() == null) {
DatabaseMapping mapping = getMapping();
if (mapping != null) {
return mapping.getSelectFields();
}
return new ArrayList<DatabaseField>(0);
}
if (descriptor.hasInheritance()
&& descriptor.getInheritancePolicy().shouldReadSubclasses()
&& (!descriptor.getInheritancePolicy().hasMultipleTableChild())
|| shouldUseOuterJoinForMultitableInheritance()) {
// return all fields because we can.
if (query != null && query.isObjectLevelReadQuery()) {
return descriptor.getAllSelectionFields((ObjectLevelReadQuery) query);
} else {
return descriptor.getAllSelectionFields();
}
} else {
if (query != null && query.isObjectLevelReadQuery()) {
return descriptor.getSelectionFields((ObjectLevelReadQuery) query);
} else {
return descriptor.getSelectionFields();
}
}
}
/**
* INTERNAL Return the descriptor which contains this query key, look in the inheritance hierarchy
* of rootDescriptor for the descriptor.
*/
public ClassDescriptor convertToCastDescriptor(
ClassDescriptor rootDescriptor, AbstractSession session) {
if (castClass == null || rootDescriptor == null || rootDescriptor.getJavaClass() == castClass) {
return rootDescriptor;
}
ClassDescriptor castDescriptor = session.getClassDescriptor(castClass);
if (castDescriptor == null) {
throw QueryException.couldNotFindCastDescriptor(castClass, getBaseExpression());
}
if (!castDescriptor.hasInheritance()) {
throw QueryException.castMustUseInheritance(getBaseExpression());
}
ClassDescriptor parentDescriptor = castDescriptor.getInheritancePolicy().getParentDescriptor();
while (parentDescriptor != null) {
if (parentDescriptor == rootDescriptor) {
return castDescriptor;
}
parentDescriptor = parentDescriptor.getInheritancePolicy().getParentDescriptor();
}
ClassDescriptor childDescriptor = rootDescriptor;
while (childDescriptor != null) {
if (childDescriptor == castDescriptor) {
return rootDescriptor;
}
childDescriptor = childDescriptor.getInheritancePolicy().getParentDescriptor();
}
throw QueryException.couldNotFindCastDescriptor(castClass, getBaseExpression());
}
/**
* INTERNAL - Return the descriptor which contains this query key, look in the inheritance
* hierarchy of rootDescriptor for the descriptor. Does not set the descriptor, only returns it.
*/
public ClassDescriptor convertToCastDescriptor(
ClassDescriptor rootDescriptor, AbstractSession session) {
isDowncast = Boolean.FALSE;
if (castClass == null || rootDescriptor == null || rootDescriptor.getJavaClass() == castClass) {
return rootDescriptor;
}
ClassDescriptor castDescriptor = session.getClassDescriptor(castClass);
if (castDescriptor == null) {
throw QueryException.couldNotFindCastDescriptor(castClass, getBaseExpression());
}
if (!castDescriptor.hasInheritance()) {
throw QueryException.castMustUseInheritance(getBaseExpression());
}
ClassDescriptor parentDescriptor = castDescriptor.getInheritancePolicy().getParentDescriptor();
while (parentDescriptor != null) {
if (parentDescriptor == rootDescriptor) {
isDowncast = Boolean.TRUE;
return castDescriptor;
}
parentDescriptor = parentDescriptor.getInheritancePolicy().getParentDescriptor();
}
// is there value casting an emp to person in a query?
ClassDescriptor childDescriptor = rootDescriptor;
while (childDescriptor != null) {
if (childDescriptor == castDescriptor) {
return rootDescriptor;
}
childDescriptor = childDescriptor.getInheritancePolicy().getParentDescriptor();
}
throw QueryException.couldNotFindCastDescriptor(castClass, getBaseExpression());
}
/**
* Return whether the reference objects must be deleted one by one, as opposed to with a single
* DELETE statement.
*/
protected boolean mustDeleteReferenceObjectsOneByOne() {
ClassDescriptor referenceDescriptor = this.getReferenceDescriptor();
return referenceDescriptor.hasDependencyOnParts()
|| referenceDescriptor.usesOptimisticLocking()
|| (referenceDescriptor.hasInheritance()
&& referenceDescriptor.getInheritancePolicy().shouldReadSubclasses())
|| referenceDescriptor.hasMultipleTables();
}
/**
* INTERNAL: much like getOwnedTables(), this gets the tables represented from the descriptor.
* Difference is this only returns local tables for the child casted descriptor, and excludes
* tables owned by the parent descriptor
*/
public List<DatabaseTable> getOwnedSubTables() {
ClassDescriptor parentDescriptor = this.typeExpressionBase.getDescriptor();
Vector<DatabaseTable> childTables = new Vector(2);
if (parentDescriptor.hasInheritance()
&& parentDescriptor.getInheritancePolicy().hasMultipleTableChild()) {
List parentTables = typeExpressionBase.getOwnedTables();
// All tables for this child, including parent tables
Vector<DatabaseTable> tables = getDescriptor().getTables();
for (DatabaseTable table : tables) {
if (!parentTables.contains(table)) {
childTables.add(table);
}
}
}
return childTables;
}
/**
* INTERNAL: Not to be confused with the public getField(String) This returns a collection of all
* fields associated with this object. Really only applies to query keys representing an object or
* to expression builders.
*/
@Override
public Vector getFields() {
if (getDescriptor() == null) {
DatabaseMapping mapping = getMapping();
if (mapping != null) {
return mapping.getSelectFields();
}
return new NonSynchronizedVector(0);
}
if (descriptor.hasInheritance()
&& descriptor.getInheritancePolicy().shouldReadSubclasses()
&& (!descriptor.getInheritancePolicy().hasMultipleTableChild())
|| shouldUseOuterJoinForMultitableInheritance()) {
// return all fields because we can.
return descriptor.getAllFields();
} else {
return descriptor.getFields();
}
}
/**
* INTERNAL: Used in case outer joins should be printed in FROM clause. Each of the additional
* tables mapped to expressions that joins it.
*/
public Map additionalTreatExpressionCriteriaMap() {
if (getDescriptor() == null) {
return null;
}
int tableSize = 0;
HashMap tablesJoinExpressions = new HashMap();
ClassDescriptor parentDescriptor = this.typeExpressionBase.getDescriptor();
// outerjoin our parent->child tables
if (parentDescriptor.hasInheritance()
&& parentDescriptor.getInheritancePolicy().hasMultipleTableChild()) {
Vector tables = getDescriptor().getTables(); // All this child's tables
tableSize = tables.size();
// look up the joins from the parent descriptor to our tables.
for (int i = 0; i < tableSize; i++) {
DatabaseTable table = (DatabaseTable) tables.elementAt(i);
Expression joinExpression =
parentDescriptor.getInheritancePolicy().getChildrenTablesJoinExpressions().get(table);
// Some of our tables might be the in our parent as well, so ignore the lack of a
// joinExpression
if (joinExpression != null) {
joinExpression = this.baseExpression.twist(joinExpression, this);
tablesJoinExpressions.put(table, joinExpression);
}
}
}
if (isUsingOuterJoinForMultitableInheritance()) {
List childrenTables = getDescriptor().getInheritancePolicy().getChildrenTables();
tableSize = childrenTables.size();
for (int i = 0; i < tableSize; i++) {
DatabaseTable table = (DatabaseTable) childrenTables.get(i);
Expression joinExpression =
getDescriptor().getInheritancePolicy().getChildrenTablesJoinExpressions().get(table);
joinExpression = this.baseExpression.twist(joinExpression, this);
tablesJoinExpressions.put(table, joinExpression);
}
}
return tablesJoinExpressions;
}
public static Hashtable buildInheritanceHierarchyTree(Project project) {
Map descriptors = project.getDescriptors();
Hashtable hierarchyTree = new Hashtable(descriptors.size());
for (Iterator descriptorIterator = descriptors.values().iterator();
descriptorIterator.hasNext(); ) {
ClassDescriptor descriptor = (ClassDescriptor) descriptorIterator.next();
String className = descriptor.getJavaClassName();
if (className == null) {
className = descriptor.getJavaClass().getName();
}
HierarchyNode node = getNodeForClass(className, hierarchyTree);
if (descriptor.hasInheritance()
&& (descriptor.getInheritancePolicy().getParentClassName() != null)) {
HierarchyNode parentNode =
getNodeForClass(descriptor.getInheritancePolicy().getParentClassName(), hierarchyTree);
node.setParent(parentNode);
}
}
return hierarchyTree;
}
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;
}
/**
* INTERNAL This method iterates through a collection and gets the values from the objects to
* conform in an in-memory query. Creation date: (1/19/01 1:18:27 PM)
*/
public Object valuesFromCollection(
Object object, AbstractSession session, int valueHolderPolicy, boolean isObjectUnregistered) {
// in case the mapping is null - this can happen if a query key is being used
// In this case, check for the query key and find it's mapping.
boolean readMappingFromQueryKey = false;
if (getMapping() == null) {
getMappingFromQueryKey();
readMappingFromQueryKey = true;
}
// For bug 2780817 get the mapping directly from the object. In EJB 2.0
// inheritance, each child must override mappings defined in an abstract
// class with its own.
DatabaseMapping mapping = this.mapping;
ClassDescriptor descriptor = mapping.getDescriptor();
if (descriptor.hasInheritance() && (descriptor.getJavaClass() != object.getClass())) {
mapping =
session
.getDescriptor(object.getClass())
.getObjectBuilder()
.getMappingForAttributeName(getName());
descriptor = mapping.getDescriptor();
}
// fetch group support
if (descriptor.hasFetchGroupManager()) {
FetchGroupManager fetchGroupManager = descriptor.getFetchGroupManager();
if (fetchGroupManager.isPartialObject(object)
&& (!fetchGroupManager.isAttributeFetched(object, mapping.getAttributeName()))) {
// the conforming attribute is not fetched, simply throw exception
throw QueryException.cannotConformUnfetchedAttribute(mapping.getAttributeName());
}
}
if (mapping.isDirectToFieldMapping()) {
return ((AbstractDirectMapping) mapping).valueFromObject(object, mapping.getField(), session);
} else if (mapping.isForeignReferenceMapping()) {
// CR 3677 integration of a ValueHolderPolicy
Object valueFromMapping = mapping.getAttributeValueFromObject(object);
if (!((ForeignReferenceMapping) mapping)
.getIndirectionPolicy()
.objectIsInstantiated(valueFromMapping)) {
if (valueHolderPolicy != InMemoryQueryIndirectionPolicy.SHOULD_TRIGGER_INDIRECTION) {
// If the client wishes us to trigger the indirection then we should do so,
// Other wise throw the exception
throw QueryException
.mustInstantiateValueholders(); // you should instantiate the valueholder for this to
// work
}
// maybe we should throw this exception from the start, to save time
}
Object valueToIterate = mapping.getRealAttributeValueFromObject(object, session);
UnitOfWorkImpl uow = isObjectUnregistered ? (UnitOfWorkImpl) session : null;
// First check that object in fact is unregistered.
// toDo: ?? Why is this commented out? Why are we supporting the unregistered thing at all?
// Does not seem to be any public API for this, nor every used internally?
// if (isObjectUnregistered) {
// isObjectUnregistered = !uow.getCloneMapping().containsKey(object);
// }
if (mapping.isCollectionMapping() && (valueToIterate != null)) {
// For bug 2766379 must use the correct version of vectorFor to
// unwrap the result same time.
valueToIterate = mapping.getContainerPolicy().vectorFor(valueToIterate, session);
// toDo: If the value is empty, need to support correct inner/outer join filtering
// symantics.
// For CR 2612601, try to partially replace the result with already
// registered objects.
if (isObjectUnregistered && (uow.getCloneMapping().get(object) == null)) {
Vector objectValues = (Vector) valueToIterate;
for (int i = 0; i < objectValues.size(); i++) {
Object original = objectValues.elementAt(i);
Object clone =
uow.getIdentityMapAccessorInstance()
.getIdentityMapManager()
.getFromIdentityMap(original);
if (clone != null) {
objectValues.setElementAt(clone, i);
}
}
}
// For CR 2612601, conforming without registering, a query could be
// bob.get("address").get("city").equal("Ottawa"); where the address
// has been registered and modified in the UOW, but bob has not. Thus
// even though bob does not point to the modified address now, it will
// as soon as it is registered, so should point to it here.
} else if (isObjectUnregistered && (uow.getCloneMapping().get(object) == null)) {
Object clone =
uow.getIdentityMapAccessorInstance()
.getIdentityMapManager()
.getFromIdentityMap(valueToIterate);
if (clone != null) {
valueToIterate = clone;
}
}
return valueToIterate;
} else if (mapping.isAggregateMapping()) {
Object aggregateValue = mapping.getAttributeValueFromObject(object);
// Bug 3995468 - if this query key is to a mapping in an aggregate object, get the object from
// actual mapping rather than the aggregate mapping
while (readMappingFromQueryKey
&& mapping.isAggregateObjectMapping()
&& !((AggregateObjectMapping) mapping)
.getReferenceClass()
.equals(queryKey.getDescriptor().getJavaClass())) {
mapping =
mapping
.getReferenceDescriptor()
.getObjectBuilder()
.getMappingForField(((DirectQueryKey) queryKey).getField());
aggregateValue = mapping.getRealAttributeValueFromObject(aggregateValue, session);
}
return aggregateValue;
} else {
throw QueryException.cannotConformExpression();
}
}
public Object buildObjectFromNestedRow(
AbstractRecord nestedRow,
JoinedAttributeManager joinManager,
ObjectBuildingQuery sourceQuery,
AbstractSession executionSession,
boolean isTargetProtected) {
Object objectToAdd = null;
ClassDescriptor aDescriptor = getReferenceDescriptor((DOMRecord) nestedRow);
if (aDescriptor == null) {
if ((getKeepAsElementPolicy() == UnmarshalKeepAsElementPolicy.KEEP_UNKNOWN_AS_ELEMENT)
|| (getKeepAsElementPolicy() == UnmarshalKeepAsElementPolicy.KEEP_ALL_AS_ELEMENT)) {
XMLPlatformFactory.getInstance()
.getXMLPlatform()
.namespaceQualifyFragment((Element) ((DOMRecord) nestedRow).getDOM());
objectToAdd = ((DOMRecord) nestedRow).getDOM();
convertDataValueToObjectValue(
objectToAdd, executionSession, ((XMLRecord) nestedRow).getUnmarshaller());
// simple case
objectToAdd = convertToSimpleTypeIfPresent(objectToAdd, nestedRow, executionSession);
} else {
NodeList children = ((Element) ((DOMRecord) nestedRow).getDOM()).getChildNodes();
for (int i = 0; i < children.getLength(); i++) {
Node nextNode = children.item(i);
if (nextNode.getNodeType() == nextNode.ELEMENT_NODE) {
// complex child
String type =
((Element) ((DOMRecord) nestedRow).getDOM())
.getAttributeNS(
javax.xml.XMLConstants.W3C_XML_SCHEMA_INSTANCE_NS_URI,
XMLConstants.SCHEMA_TYPE_ATTRIBUTE);
if (type != null && type.length() > 0) {
throw XMLMarshalException.unknownXsiTypeValue(type, (Mapping) this);
} else {
throw XMLMarshalException.noDescriptorFound((Mapping) this);
}
}
}
// simple case
objectToAdd = convertToSimpleTypeIfPresent(objectToAdd, nestedRow, executionSession);
}
} else {
if (aDescriptor.hasInheritance()) {
Class newElementClass =
aDescriptor.getInheritancePolicy().classFromRow(nestedRow, executionSession);
if (newElementClass == null) {
// no xsi:type attribute - look for type indicator on the field
QName leafElementType = ((XMLField) getField()).getLeafElementType();
if (leafElementType != null) {
XPathQName leafElementXPathQName =
new XPathQName(leafElementType, ((XMLRecord) nestedRow).isNamespaceAware());
Object indicator =
aDescriptor
.getInheritancePolicy()
.getClassIndicatorMapping()
.get(leafElementXPathQName);
if (indicator != null) {
newElementClass = (Class) indicator;
}
}
}
if (newElementClass != null) {
aDescriptor = this.getReferenceDescriptor(newElementClass, executionSession);
} else {
// since there is no xsi:type attribute or leaf element type set,
// use the reference descriptor - make sure it is non-abstract
if (Modifier.isAbstract(aDescriptor.getJavaClass().getModifiers())) {
// throw an exception
throw DescriptorException.missingClassIndicatorField(
nestedRow, aDescriptor.getInheritancePolicy().getDescriptor());
}
}
}
// Object element
objectToAdd =
buildCompositeObject(
aDescriptor, nestedRow, sourceQuery, null, joinManager, executionSession);
objectToAdd =
convertDataValueToObjectValue(
objectToAdd, executionSession, ((XMLRecord) nestedRow).getUnmarshaller());
}
return objectToAdd;
}
/**
* 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;
}
