/** INTERNAL: Prepare the receiver for execution in a session. */
protected void prepare() {
super.prepare();
this.usesOptimisticLocking = shouldUseOptimisticLocking(this.object);
if (this.name == null) {
this.name = "delete" + this.descriptor.getJavaClass().getSimpleName();
}
getQueryMechanism().prepareDeleteObject();
}
/** PUBLIC: (REQUIRED) Set the object required for modification. */
@Override
public void setObject(Object object) {
if (isPrepared()) {
if (this.usesOptimisticLocking != shouldUseOptimisticLocking(object)) {
setIsPrepared(false);
}
}
super.setObject(object);
}
/**
* INTERNAL: Prepare the receiver for execution in a session. In particular, verify that the
* object is not null and contains a valid primary key.
*/
public void prepareForExecution() throws QueryException {
super.prepareForExecution();
// Set the translation row
if ((this.translationRow == null) || this.translationRow.isEmpty()) {
if (this.isFullRowRequired) {
this.translationRow =
this.descriptor
.getObjectBuilder()
.buildRow(this.object, this.session, WriteType.UNDEFINED);
} else {
this.translationRow =
this.descriptor.getObjectBuilder().buildRowForTranslation(this.object, this.session);
}
}
// Add the write lock field if required
if (this.descriptor.usesOptimisticLocking()) {
this.descriptor.getOptimisticLockingPolicy().addLockValuesToTranslationRow(this);
}
}
/** 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()));
}
}
}
/** INTERNAL: Prepare the receiver for execution in a session. */
protected void prepare() {
super.prepare();
getQueryMechanism().prepareDeleteObject();
}
