/**
* Reset the commit order from the session's descriptors. This uses the constraint dependencies in
* the descriptor's mappings, to decide which descriptors are dependent on which other
* descriptors. Multiple computations of the commit order should produce the same ordering. This
* is done to improve performance on unit of work writes through decreasing the stack size, and
* acts as a deadlock avoidance mechanism.
*/
public void initializeCommitOrder() {
Vector descriptors = Helper.buildVectorFromMapElements(getSession().getDescriptors());
// Must ensure uniqueness, some descriptor my be register twice for interfaces.
descriptors = Helper.addAllUniqueToVector(new Vector(descriptors.size()), descriptors);
Object[] descriptorsArray = new Object[descriptors.size()];
for (int index = 0; index < descriptors.size(); index++) {
descriptorsArray[index] = descriptors.elementAt(index);
}
Arrays.sort(descriptorsArray, new DescriptorCompare());
descriptors = new Vector(descriptors.size());
for (int index = 0; index < descriptorsArray.length; index++) {
descriptors.addElement(descriptorsArray[index]);
}
CommitOrderCalculator calculator = new CommitOrderCalculator(getSession());
calculator.addNodes(descriptors);
calculator.calculateMappingDependencies();
calculator.orderCommits();
descriptors = calculator.getOrderedDescriptors();
calculator = new CommitOrderCalculator(getSession());
calculator.addNodes(descriptors);
calculator.calculateSpecifiedDependencies();
calculator.orderCommits();
setCommitOrder(calculator.getOrderedClasses());
}
/** Return any tables that are defined by this expression (and not its base). */
@Override
public List<DatabaseTable> getOwnedTables() {
ClassDescriptor descriptor = getDescriptor();
List<DatabaseTable> tables = null;
if (descriptor == null) {
List additionalTables = getAdditionalTables();
if (additionalTables == null) {
return null;
} else {
return new ArrayList(additionalTables);
}
} else if (descriptor.isAggregateDescriptor()) {
return null;
} else if ((descriptor.getHistoryPolicy() != null)
&& (getAsOfClause() != null && getAsOfClause().getValue() != null)) {
tables = descriptor.getHistoryPolicy().getHistoricalTables();
} else if (isUsingOuterJoinForMultitableInheritance()) {
tables = descriptor.getInheritancePolicy().getAllTables();
} else {
tables = descriptor.getTables();
}
List additionalTables = getAdditionalTables();
if (additionalTables != null) {
tables = new Vector(tables);
Helper.addAllUniqueToList(tables, additionalTables);
return tables;
}
return tables;
}
/** INTERNAL: */
public String toString() {
StringWriter writer = new StringWriter();
writer.write(Helper.getShortClassName(getClass()));
writer.write("(");
for (int index = 0; index < getFields().size(); index++) {
writer.write(Helper.cr());
writer.write("\t");
writer.write(String.valueOf((getFields().elementAt(index))));
writer.write(" => ");
writer.write(String.valueOf((getValues().elementAt(index))));
}
writer.write(")");
return writer.toString();
}
/** PUBLIC: Add a type indicator conversion to this mapping. */
public void addClassIndicator(Class implementer, Object typeIndicator) {
if (typeIndicator == null) {
typeIndicator = Helper.getNullWrapper();
}
getTypeIndicatorTranslation().put(implementer, typeIndicator);
getTypeIndicatorTranslation().put(typeIndicator, implementer);
}
/** INTERNAL: Return the type for a specified implementor */
protected Object getTypeForImplementor(Class implementor) {
Object type = getTypeIndicatorTranslation().get(implementor);
if (type == Helper.getNullWrapper()) {
type = null;
}
return type;
}
/**
* INTERNAL: Extract the direct values from the specified field value. Return them in a vector.
* The field value better be an Array.
*/
public Vector buildDirectValuesFromFieldValue(Object fieldValue) throws DatabaseException {
if (fieldValue == null) {
return null;
}
return Helper.vectorFromArray((Object[]) fieldValue);
}
public String toString() {
if (isInstantiated()) {
return "{" + getValue() + "}";
} else {
return "{"
+ Helper.getShortClassName(getClass())
+ ": "
+ ToStringLocalization.buildMessage("not_instantiated", (Object[]) null)
+ "}";
}
}
/** INTERNAL: Return the implementor for a specified type */
protected Object getImplementorForType(Object type, AbstractSession session) {
if (type == null) {
return getTypeIndicatorTranslation().get(Helper.getNullWrapper());
}
// Must ensure the type is the same, i.e. Integer != BigDecimal.
try {
type = session.getDatasourcePlatform().convertObject(type, getTypeField().getType());
} catch (ConversionException e) {
throw ConversionException.couldNotBeConverted(this, getDescriptor(), e);
}
return getTypeIndicatorTranslation().get(type);
}
/**
* INTERNAL: Build the appropriate field value for the specified set of direct values. The
* database better be expecting an ARRAY.
*/
public Object buildFieldValueFromDirectValues(
Vector directValues, String elementDataTypeName, AbstractSession session)
throws DatabaseException {
Object[] fields = Helper.arrayFromVector(directValues);
try {
((DatabaseAccessor) session.getAccessor()).incrementCallCount(session);
java.sql.Connection connection = ((DatabaseAccessor) session.getAccessor()).getConnection();
return session.getPlatform().createArray(elementDataTypeName, fields, session, connection);
} catch (java.sql.SQLException ex) {
throw DatabaseException.sqlException(ex, session, false);
} finally {
((DatabaseAccessor) session.getAccessor()).decrementCallCount();
}
}
/** INTERNAL: Set the type field classification through searching the indicators hashtable. */
@Override
public void preInitialize(AbstractSession session) throws DescriptorException {
super.preInitialize(session);
if (getTypeIndicatorTranslation().isEmpty()) {
return;
}
Class type = null;
for (Iterator typeValuesEnum = getTypeIndicatorTranslation().values().iterator();
typeValuesEnum.hasNext() && (type == null); ) {
Object value = typeValuesEnum.next();
if ((value != Helper.getNullWrapper()) && (!(value instanceof Class))) {
type = value.getClass();
}
}
getTypeField().setType(type);
}
/**
* INTERNAL: Add indicators by classname. For use by the Mapping Workbench to avoid classpath
* dependencies
*/
public void addClassNameIndicator(String className, Object typeIndicator) {
if (typeIndicator == null) {
typeIndicator = Helper.getNullWrapper();
}
getTypeIndicatorNameTranslation().put(className, typeIndicator);
}
/**
* INTERNAL: Rehash any maps based on fields. This is used to clone descriptors for aggregates,
* which hammer field names.
*/
@Override
public void rehashFieldDependancies(AbstractSession session) {
setSourceToTargetQueryKeyFields(Helper.rehashMap(getSourceToTargetQueryKeyNames()));
}
/** Print the in progress depth. */
public String toString() {
Object[] args = {Integer.valueOf(this.commitDepth)};
return Helper.getShortClassName(getClass())
+ ToStringLocalization.buildMessage("commit_depth", args);
}