/**
* 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;
}
/**
* PUBLIC: Connect to the database using the predefined login. This connects all of the child
* sessions and expects that they are in a valid state to be connected.
*/
public void login(String userName, String password) throws DatabaseException {
// Bug#3440544 Check if logged in already to stop the attempt to login more than once
if (isLoggedIn) {
throw ValidationException.alreadyLoggedIn(this.getName());
} else {
if (this.eventManager != null) {
this.eventManager.preLogin(this);
}
// Bug 3848021 - ensure the external transaction controller is initialized
if (!isConnected()) {
getServerPlatform().initializeExternalTransactionController();
}
// Connection all sessions and initialize
for (Iterator sessionEnum = getSessionsByName().values().iterator();
sessionEnum.hasNext(); ) {
DatabaseSessionImpl session = (DatabaseSessionImpl) sessionEnum.next();
if (session.hasEventManager()) {
session.getEventManager().preLogin(session);
}
session.getDatasourceLogin().setUserName(userName);
session.getDatasourceLogin().setPassword(password);
if (!session.isConnected()) {
session.connect();
}
}
initializeDescriptors();
this.isLoggedIn = true;
}
}
/**
* PUBLIC: Return a session broker that behaves as a client session broker. An acquire session
* broker is done under the covers on each session inside the session broker, and a new broker is
* returned.
*
* <p>NOTE: when finished with the client broker, it should be releases. See
* releaseClientSessionBroker.
*/
public SessionBroker acquireClientSessionBroker() {
log(SessionLog.FINER, SessionLog.CONNECTION, "acquire_client_session_broker");
SessionBroker clientBroker = copySessionBroker();
clientBroker.parent = this;
clientBroker
.getIdentityMapAccessorInstance()
.setIdentityMapManager(getIdentityMapAccessorInstance().getIdentityMapManager());
clientBroker.commitManager = getCommitManager();
clientBroker.commandManager = getCommandManager();
clientBroker.externalTransactionController = getExternalTransactionController();
clientBroker.setServerPlatform(getServerPlatform());
String sessionName;
AbstractSession serverSession;
Iterator names = this.getSessionsByName().keySet().iterator();
while (names.hasNext()) {
sessionName = (String) names.next();
serverSession = getSessionForName(sessionName);
if (serverSession instanceof org.eclipse.persistence.sessions.server.ServerSession) {
if (serverSession.getProject().hasIsolatedClasses()) {
throw ValidationException.isolatedDataNotSupportedInSessionBroker(sessionName);
}
clientBroker.internalRegisterSession(
sessionName,
((org.eclipse.persistence.sessions.server.ServerSession) serverSession)
.acquireClientSession());
} else {
throw ValidationException.cannotAcquireClientSessionFromSession();
}
}
clientBroker.initializeSequencing();
return clientBroker;
}
/**
* INTERNAL: Convert all the class-name-based settings in this mapping to actual class-based
* settings. This method is used when converting a project that has been built with class names to
* a project with classes.
*/
@Override
public void convertClassNamesToClasses(ClassLoader classLoader) {
super.convertClassNamesToClasses(classLoader);
Iterator iterator = getTypeIndicatorNameTranslation().entrySet().iterator();
this.typeIndicatorTranslation = new HashMap();
while (iterator.hasNext()) {
Map.Entry entry = (Map.Entry) iterator.next();
String referenceClassName = (String) entry.getKey();
Object indicator = entry.getValue();
Class referenceClass = null;
try {
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()) {
try {
referenceClass =
(Class)
AccessController.doPrivileged(
new PrivilegedClassForName(referenceClassName, true, classLoader));
} catch (PrivilegedActionException exception) {
throw ValidationException.classNotFoundWhileConvertingClassNames(
referenceClassName, exception.getException());
}
} else {
referenceClass =
PrivilegedAccessHelper.getClassForName(referenceClassName, true, classLoader);
}
} catch (ClassNotFoundException exception) {
throw ValidationException.classNotFoundWhileConvertingClassNames(
referenceClassName, exception);
}
addClassIndicator(referenceClass, indicator);
}
}
/**
* INTERNAL: This methods clones all the fields and ensures that each collection refers to the
* same clones.
*/
@Override
public Object clone() {
VariableOneToOneMapping clone = (VariableOneToOneMapping) super.clone();
Map setOfKeys = new HashMap(getSourceToTargetQueryKeyNames().size());
Map sourceToTarget = new HashMap(getSourceToTargetQueryKeyNames().size());
Vector foreignKeys =
org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance(
getForeignKeyFields().size());
if (getTypeField() != null) {
clone.setTypeField((DatabaseField) this.getTypeField().clone());
}
for (Iterator enumtr = getSourceToTargetQueryKeyNames().keySet().iterator();
enumtr.hasNext(); ) {
// Clone the SourceKeyFields
DatabaseField field = (DatabaseField) enumtr.next();
DatabaseField clonedField = (DatabaseField) field.clone();
setOfKeys.put(field, clonedField);
// on the next line I'm cloning the query key names
sourceToTarget.put(clonedField, getSourceToTargetQueryKeyNames().get(field));
}
for (Enumeration enumtr = getForeignKeyFields().elements(); enumtr.hasMoreElements(); ) {
DatabaseField field = (DatabaseField) enumtr.nextElement();
foreignKeys.addElement(setOfKeys.get(field));
}
clone.setSourceToTargetQueryKeyFields(sourceToTarget);
clone.setForeignKeyFields(foreignKeys);
clone.setTypeIndicatorTranslation(new HashMap(this.getTypeIndicatorTranslation()));
return clone;
}
/**
* PUBLIC: set the integrityChecker. IntegrityChecker holds all the ClassDescriptor Exceptions.
*/
public void setIntegrityChecker(IntegrityChecker integrityChecker) {
super.setIntegrityChecker(integrityChecker);
for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
AbstractSession session = (AbstractSession) sessionEnum.next();
session.setIntegrityChecker(integrityChecker);
}
}
/**
* PUBLIC: Set the message log.
*
* @see #logMessages()
*/
public void setLog(Writer log) {
super.setLog(log);
for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
AbstractSession session = (AbstractSession) sessionEnum.next();
session.setLog(log);
}
}
/**
* PUBLIC: Set the profiler for the session. This allows for performance operations to be
* profiled.
*/
public void setProfiler(SessionProfiler profiler) {
super.setProfiler(profiler);
for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
AbstractSession session = (AbstractSession) sessionEnum.next();
session.setProfiler(profiler);
}
}
/**
* INTERNAL: Set isSynchronized flag to indicate that members of session broker are synchronized.
* This method should only be called by setSynchronized method of UnitOfWork obtained from either
* DatabaseSession Broker or ClientSession Broker.
*/
public void setSynchronized(boolean synched) {
if (!isServerSessionBroker()) {
super.setSynchronized(synched);
Iterator itSessions = getSessionsByName().values().iterator();
while (itSessions.hasNext()) {
((AbstractSession) itSessions.next()).setSynchronized(synched);
}
}
}
/**
* INTERNAL: The foreign key names and their primary keys are converted to DatabaseField and
* stored.
*/
protected void initializeForeignKeys(AbstractSession session) {
HashMap newSourceToTargetQueryKeyNames = new HashMap(getSourceToTargetQueryKeyNames().size());
Iterator iterator = getSourceToTargetQueryKeyNames().entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry entry = (Map.Entry) iterator.next();
DatabaseField field = getDescriptor().buildField((DatabaseField) entry.getKey());
newSourceToTargetQueryKeyNames.put(field, entry.getValue());
}
this.sourceToTargetQueryKeyNames = newSourceToTargetQueryKeyNames;
}
/** PUBLIC: Return if this session is a server session broker. */
public boolean isServerSessionBroker() {
for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
AbstractSession session = (AbstractSession) sessionEnum.next();
if (session.isServerSession()) {
return true;
}
}
return false;
}
/**
* PUBLIC: Release the session. This does nothing by default, but allows for other sessions such
* as the ClientSession to do something.
*/
public void release() {
if (isClientSessionBroker()) {
log(SessionLog.FINER, SessionLog.CONNECTION, "releasing_client_session_broker");
}
AbstractSession session;
for (Iterator enumtr = getSessionsByName().values().iterator(); enumtr.hasNext(); ) {
session = (AbstractSession) enumtr.next();
session.release();
}
super.release();
}
/** PUBLIC: Return a collection of the field to query key associations. */
public Vector getSourceToTargetQueryKeyFieldAssociations() {
Vector associations = new Vector(getSourceToTargetQueryKeyNames().size());
Iterator sourceFieldEnum = getSourceToTargetQueryKeyNames().keySet().iterator();
Iterator targetQueryKeyEnum = getSourceToTargetQueryKeyNames().values().iterator();
while (sourceFieldEnum.hasNext()) {
Object fieldValue = ((DatabaseField) sourceFieldEnum.next()).getQualifiedName();
Object attributeValue = targetQueryKeyEnum.next();
associations.addElement(new Association(fieldValue, attributeValue));
}
return associations;
}
/**
* PUBLIC: Disconnect from all databases.
*
* @exception EclipseLinkException if a transaction is active, you must rollback any active
* transaction before logout.
* @exception DatabaseException the database will also raise an error if their is an active
* transaction, or a general error occurs.
*/
public void logout() throws DatabaseException {
for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
DatabaseSessionImpl session = (DatabaseSessionImpl) sessionEnum.next();
session.logout();
}
if (!isClientSessionBroker()) {
if (hasExternalTransactionController()) {
getExternalTransactionController().clearSequencingListeners();
}
}
sequencing = null;
isLoggedIn = false;
}
/** INTERNAL: Rollback the transaction on all child sessions. */
protected void basicRollbackTransaction() throws DatabaseException {
DatabaseException globalException = null;
for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
AbstractSession session = (AbstractSession) sessionEnum.next();
try {
session.rollbackTransaction();
} catch (DatabaseException exception) {
globalException = exception;
}
}
if (globalException != null) {
throw globalException;
}
}
/**
* INTERNAL: Returns a number of member sessions that require sequencing callback. Always returns
* 0 if sequencing is not connected.
*/
public int howManySequencingCallbacks() {
if (this.isClientSessionBroker()) {
return getParent().howManySequencingCallbacks();
} else {
int nCallbacks = 0;
Iterator itSessions = getSessionsByName().values().iterator();
while (itSessions.hasNext()) {
if (((DatabaseSessionImpl) itSessions.next()).isSequencingCallbackRequired()) {
nCallbacks++;
}
}
return nCallbacks;
}
}
/** PUBLIC: Return if all sessions are still connected to the database. */
public boolean isConnected() {
if ((getSessionsByName() == null) || (getSessionsByName().isEmpty())) {
return false;
}
for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
AbstractSession session = (AbstractSession) sessionEnum.next();
if (!session.isConnected()) {
return false;
}
}
return true;
}
/**
* INTERNAL: Return the typeIndicatorName translation Used by the Mapping Workbench to avoid
* classpath dependencies
*/
public Map getTypeIndicatorNameTranslation() {
if (typeIndicatorNameTranslation.isEmpty() && !typeIndicatorTranslation.isEmpty()) {
Iterator keysEnum = typeIndicatorTranslation.keySet().iterator();
Iterator valuesEnum = typeIndicatorTranslation.values().iterator();
while (keysEnum.hasNext()) {
Object key = keysEnum.next();
Object value = valuesEnum.next();
if (key instanceof Class) {
String className = ((Class) key).getName();
typeIndicatorNameTranslation.put(className, value);
}
}
}
return typeIndicatorNameTranslation;
}
/**
* PUBLIC: Register the session under its name. All of the session's descriptors must have already
* been registered. The session should not be connected and descriptors should not be initialized.
*/
public void registerSession(String name, AbstractSession session) {
session.setIsInBroker(true);
getSessionsByName().put(name, session);
session.setBroker(this);
session.setName(name);
// The keys/classes must also be used as some descriptors may be under multiple classes.
Iterator descriptors = session.getDescriptors().values().iterator();
Iterator classes = session.getDescriptors().keySet().iterator();
while (descriptors.hasNext()) {
ClassDescriptor descriptor = (ClassDescriptor) descriptors.next();
Class descriptorClass = (Class) classes.next();
getSessionNamesByClass().put(descriptorClass, name);
getDescriptors().put(descriptorClass, descriptor);
}
}
/**
* INTERNAL: Return the class indicator associations for XML. List of class-name/value
* associations.
*/
public Vector getClassIndicatorAssociations() {
Vector associations = new Vector();
Iterator classesEnum = getTypeIndicatorNameTranslation().keySet().iterator();
Iterator valuesEnum = getTypeIndicatorNameTranslation().values().iterator();
while (classesEnum.hasNext()) {
Object className = classesEnum.next();
// If the project was built in runtime is a class, MW is a string.
if (className instanceof Class) {
className = ((Class) className).getName();
}
Object value = valuesEnum.next();
associations.addElement(new TypedAssociation(className, value));
}
return associations;
}
/** 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: 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;
}
/** INTERNAL: Acquires a special historical session for reading objects as of a past time. */
public org.eclipse.persistence.sessions.Session acquireHistoricalSession(AsOfClause clause)
throws ValidationException {
if (isServerSessionBroker()) {
throw ValidationException.cannotAcquireHistoricalSession();
}
// ? logMessage("acquire_client_session_broker", (Object[])null);
SessionBroker historicalBroker = copySessionBroker();
String sessionName;
AbstractSession session;
Iterator names = this.getSessionsByName().keySet().iterator();
while (names.hasNext()) {
sessionName = (String) names.next();
session = getSessionForName(sessionName);
historicalBroker.registerSession(sessionName, session.acquireHistoricalSession(clause));
}
return historicalBroker;
}
// Bug#3551263 Override getQuery(String name, Vector arguments) in Session search through
// the server session broker as well
public DatabaseQuery getQuery(String name, Vector arguments) {
DatabaseQuery query = super.getQuery(name, arguments);
if (isClientSessionBroker() && (query == null)) {
String sessionName = null;
AbstractSession ssession = null;
Iterator names = this.getSessionsByName().keySet().iterator();
while (names.hasNext()) {
sessionName = (String) names.next();
ssession = getSessionForName(sessionName);
if (ssession instanceof org.eclipse.persistence.sessions.server.ClientSession) {
query = ((ClientSession) ssession).getParent().getBroker().getQuery(name, arguments);
if (query != null) {
return query;
}
}
}
}
return query;
}
/** PUBLIC: Return true if the pre-defined query is defined on the session. */
public boolean containsQuery(String queryName) {
boolean containsQuery = getQueries().containsKey(queryName);
if (isClientSessionBroker() && (containsQuery == false)) {
String sessionName = null;
AbstractSession ssession = null;
Iterator names = this.getSessionsByName().keySet().iterator();
while (names.hasNext()) {
sessionName = (String) names.next();
ssession = getSessionForName(sessionName);
if (ssession instanceof org.eclipse.persistence.sessions.server.ClientSession) {
if (((ClientSession) ssession).getParent().getBroker().containsQuery(queryName)) {
return true;
}
}
}
}
return containsQuery;
}
/**
* INTERNAL: Selection criteria is created with source foreign keys and target keys. This criteria
* is then used to read target records from the table.
*/
public void initializeSelectionCriteria(AbstractSession session) {
Expression selectionCriteria = null;
Expression expression;
ExpressionBuilder expBuilder = new ExpressionBuilder();
Iterator sourceKeysEnum = getSourceToTargetQueryKeyNames().keySet().iterator();
while (sourceKeysEnum.hasNext()) {
DatabaseField sourceKey = (DatabaseField) sourceKeysEnum.next();
String target = (String) this.getSourceToTargetQueryKeyNames().get(sourceKey);
expression = expBuilder.getParameter(sourceKey).equal(expBuilder.get(target));
if (selectionCriteria == null) {
selectionCriteria = expression;
} else {
selectionCriteria = expression.and(selectionCriteria);
}
}
setSelectionCriteria(selectionCriteria);
}
/**
* PUBLIC: Return the query from the session pre-defined queries with the given name. This allows
* for common queries to be pre-defined, reused and executed by name.
*/
public DatabaseQuery getQuery(String name) {
// Bug#3473441 Should always call super first to ensure any change in Session will be reflected
// here.
DatabaseQuery query = super.getQuery(name);
if (isClientSessionBroker() && (query == null)) {
String sessionName = null;
AbstractSession ssession = null;
Iterator names = this.getSessionsByName().keySet().iterator();
while (names.hasNext()) {
sessionName = (String) names.next();
ssession = getSessionForName(sessionName);
if (ssession instanceof org.eclipse.persistence.sessions.server.ClientSession) {
query = ((ClientSession) ssession).getParent().getBroker().getQuery(name);
if (query != null) {
return query;
}
}
}
}
return query;
}
/**
* INTERNAL: This method notifies the accessor that a particular sets of writes has completed.
* This notification can be used for such thing as flushing the batch mechanism
*/
public void writesCompleted() {
for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
AbstractSession session = (AbstractSession) sessionEnum.next();
if (!session.isConnected()) {
throw DatabaseException.databaseAccessorNotConnected();
}
}
for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
AbstractSession session = (AbstractSession) sessionEnum.next();
session.writesCompleted();
}
}
/**
* INTERNAL: Commit the transaction on all child sessions. This assumes that the commit of the
* transaction will not fail because all of the modification has already taken place and no errors
* would have occurred.
*/
protected void basicCommitTransaction() throws DatabaseException {
// Do one last check it make sure that all sessions are still connected.
for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
AbstractSession session = (AbstractSession) sessionEnum.next();
if (!session.isConnected()) {
throw DatabaseException.databaseAccessorNotConnected();
}
}
for (Iterator sessionEnum = getSessionsByName().values().iterator(); sessionEnum.hasNext(); ) {
AbstractSession session = (AbstractSession) sessionEnum.next();
session.commitTransaction();
}
}
/**
* INTERNAL: Allow each descriptor to initialize any dependencies on this session. This is done in
* two passes to allow the inheritance to be resolved first. Normally the descriptors are added
* before login, then initialized on login.
*/
public void initializeDescriptors() {
// ClientSession initializes sequencing during construction,
// however DatabaseSession and ServerSession normally call initializeSequencing()
// in initializeDescriptors method.
// Because initializeDescriptors() is not called for a session-member of a SessionBroker,
// initializeSequencing() for the sessions should be called here.
if (!isClientSessionBroker()) {
for (Iterator enumtr = getSessionsByName().values().iterator(); enumtr.hasNext(); ) {
DatabaseSessionImpl databaseSession = (DatabaseSessionImpl) enumtr.next();
databaseSession.initializeSequencing();
}
if (hasExternalTransactionController()) {
getExternalTransactionController().initializeSequencingListeners();
}
}
super.initializeDescriptors();
// Must reset project options to session broker project, as initialization occurs
// with local projects.
for (Iterator enumtr = getSessionsByName().values().iterator(); enumtr.hasNext(); ) {
DatabaseSessionImpl databaseSession = (DatabaseSessionImpl) enumtr.next();
if (databaseSession.getProject().hasGenericHistorySupport()) {
getProject().setHasGenericHistorySupport(true);
}
if (databaseSession.getProject().hasIsolatedClasses()) {
getProject().setHasIsolatedClasses(true);
}
if (databaseSession.getProject().hasNonIsolatedUOWClasses()) {
getProject().setHasNonIsolatedUOWClasses(true);
}
getProject()
.getDefaultReadOnlyClasses()
.addAll(databaseSession.getProject().getDefaultReadOnlyClasses());
}
// ServerSessionBroker doesn't need sequencing.
// Sequencing should be obtained either from the ClientSessionBroker or directly
// from the ClientSession.
if (isServerSessionBroker()) {
sequencing = null;
}
}
