/** INTERNAL: Transform the object-level value into a database-level value */
public Object getFieldValue(Object objectValue, AbstractSession session) {
DatabaseMapping mapping = getMapping();
Object fieldValue = objectValue;
if ((mapping != null)
&& (mapping.isDirectToFieldMapping() || mapping.isDirectCollectionMapping())) {
// CR#3623207, check for IN Collection here not in mapping.
if (objectValue instanceof Collection) {
// This can actually be a collection for IN within expressions... however it would be better
// for expressions to handle this.
Collection values = (Collection) objectValue;
Vector fieldValues = new Vector(values.size());
for (Iterator iterator = values.iterator(); iterator.hasNext(); ) {
Object value = iterator.next();
if (!(value instanceof Expression)) {
value = getFieldValue(value, session);
}
fieldValues.add(value);
}
fieldValue = fieldValues;
} else {
if (mapping.isDirectToFieldMapping()) {
fieldValue = ((AbstractDirectMapping) mapping).getFieldValue(objectValue, session);
} else if (mapping.isDirectCollectionMapping()) {
fieldValue = ((DirectCollectionMapping) mapping).getFieldValue(objectValue, session);
}
}
}
return fieldValue;
}
/**
* 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: 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;
}
/**
* 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;
}
/**
* INTERNAL: writes the first field from each of the owned tables, used for fine-grained
* pessimistic locking.
*/
protected void writeForUpdateOfFields(
ExpressionSQLPrinter printer, SQLSelectStatement statement) {
for (Iterator iterator = getForUpdateOfFields().iterator(); iterator.hasNext(); ) {
DatabaseField field = (DatabaseField) iterator.next();
if (printer.getPlatform().shouldPrintAliasForUpdate()) {
writeAlias(printer, field, statement);
} else {
writeField(printer, field, statement);
}
}
}
/** 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;
}
/**
* 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;
}
/** 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: 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: 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: 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);
}
