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package oracle.toplink.essentials.queryframework;
import java.util.*;
import oracle.toplink.essentials.internal.helper.*;
import oracle.toplink.essentials.internal.sessions.*;
import oracle.toplink.essentials.exceptions.*;
import oracle.toplink.essentials.internal.sessions.AbstractRecord;
import oracle.toplink.essentials.internal.sessions.UnitOfWorkImpl;
import oracle.toplink.essentials.internal.sessions.AbstractSession;
import oracle.toplink.essentials.descriptors.ClassDescriptor;
/**
* <p><b>Purpose</b>:
* Abstract class for all object modify queries.
*
* <p><b>Responsibilities</b>:
* <ul>
* <li> Stores & retrieves the object to modify.
* <li> Stores & retrieves the primary key of the objects.
* </ul>
*
* @author Yvon Lavoie
* @since TOPLink/Java 1.0
*/
public abstract class ObjectLevelModifyQuery extends ModifyQuery {
/* Primary key of the object to be modified. */
protected Vector primaryKey;
/* The object being modified. */
protected Object object;
/* A changeSet representing the object being modified */
protected ObjectChangeSet objectChangeSet;
/* The clone of the object being modified from unit of work. */
protected Object backupClone;
/**
* PUBLIC:
* Initialize the state of the query.
*/
public ObjectLevelModifyQuery() {
this.cascadePolicy = CascadePrivateParts;
}
/**
* INTERNAL:
* Ensure that the descriptor has been set.
*/
public void checkDescriptor(AbstractSession session) throws QueryException {
if (getDescriptor() == null) {
if (getObject() == null) {
throw QueryException.objectToModifyNotSpecified(this);
}
//Bug#3947714 Pass the object instead of class in case object is proxy
ClassDescriptor referenceDescriptor = session.getDescriptor(getObject());
if (referenceDescriptor == null) {
throw QueryException.descriptorIsMissing(getObject().getClass(), this);
}
setDescriptor(referenceDescriptor);
}
}
/**
* INTERNAL:
* All have done is move code from UnitOfWork.internalExecuteQuery
*/
public Object executeInUnitOfWork(UnitOfWorkImpl unitOfWork, AbstractRecord translationRow) throws DatabaseException {
if (unitOfWork.isAfterWriteChangesButBeforeCommit()) {
throw ValidationException.illegalOperationForUnitOfWorkLifecycle(unitOfWork.getLifecycle(), "executeQuery(ObjectLevelModifyQuery)");
}
return executeInUnitOfWorkObjectLevelModifyQuery(unitOfWork, translationRow);
}
/**
* INTERNAL:
* This code was moved from UnitOfWork.internalExecuteQuery
* @param unitOfWork
* @param translationRow
* @return
* @throws oracle.toplink.essentials.exceptions.DatabaseException
* @throws oracle.toplink.essentials.exceptions.OptimisticLockException
*/
protected Object executeInUnitOfWorkObjectLevelModifyQuery(UnitOfWorkImpl unitOfWork, AbstractRecord translationRow) throws DatabaseException, OptimisticLockException {
if (!unitOfWork.getCommitManager().isActive()) {
throw QueryException.invalidQuery(this);
}
if ((getObject() != null) && (unitOfWork.isClassReadOnly(getObject().getClass()))) {
return getObject();
}
// CR#3216 - Apply check to ObjectLevelModifyQuery not just WriteObjectQuery
if (unitOfWork.shouldPerformNoValidation() && unitOfWork.getUnregisteredExistingObjects().containsKey(getObject())) {
//if the object is an unregistered existing object then skip it. This
// Will only be in the collection if validation is turned off
return null;
}
return super.executeInUnitOfWork(unitOfWork, translationRow);
}
/**
* INTERNAL:
* Return the backup clone of the object from the unit of work.
*/
public Object getBackupClone() {
// PERF: A backup clone is only required for the old commit,
// So avoid its creation for normal commit.
if ((backupClone == null) && getSession().isUnitOfWork()) {
setBackupClone(((UnitOfWorkImpl)getSession()).getBackupCloneForCommit(getObject()));
}
return backupClone;
}
/**
* PUBLIC:
* Return the object required for modification.
*/
public Object getObject() {
return object;
}
/**
* PUBLIC:
* Return the ObjectChangeSet representing the object being changed
*/
public ObjectChangeSet getObjectChangeSet() {
return this.objectChangeSet;
}
/**
* INTERNAL:
* Get the primary key for the query
*/
public Vector getPrimaryKey() {
return primaryKey;
}
/**
* Return the domain class associated with this query.
*/
public Class getReferenceClass() {
return getObject().getClass();
}
/**
* INTERNAL:
* Return the reference class for a query
* Note: Although the API is designed to avoid classpath dependancies for the MW, since the object
* is specified at runtime, this will not be an issue.
*/
public String getReferenceClassName() {
return getReferenceClass().getName();
}
/**
* PUBLIC:
* Return if this is an object level modify query.
*/
public boolean isObjectLevelModifyQuery() {
return true;
}
/**
* INTERNAL:
* Prepare the receiver for execution in a session.
* In particular check that the tables on the descriptor are set.
*/
protected void prepare() throws QueryException {
checkDescriptor(getSession());
if (getObject() != null) {// Prepare can be called without the object set yet.
setObject(getDescriptor().getObjectBuilder().unwrapObject(getObject(), getSession()));
}
if (getDescriptor().isAggregateDescriptor()) {
throw QueryException.aggregateObjectCannotBeDeletedOrWritten(getDescriptor(), this);
}
super.prepare();
}
/**
* INTERNAL:
* Prepare the receiver for execution in a session.
* In particular check that the tables on the descriptor are set.
*/
public void prepareForExecution() throws QueryException {
super.prepareForExecution();
if (getObject() == null) {
throw QueryException.objectToModifyNotSpecified(this);
}
setObject(getDescriptor().getObjectBuilder().unwrapObject(getObject(), getSession()));
if (getPrimaryKey() == null) {
if (getObjectChangeSet() != null) {
setPrimaryKey(getObjectChangeSet().getPrimaryKeys());
} else {
setPrimaryKey(getSession().keyFromObject(getObject()));
}
}
}
/**
* INTERNAL:
* Set the backup clone of the object from the unit of work.
*/
public void setBackupClone(Object backupClone) {
this.backupClone = backupClone;
}
/**
* PUBLIC (REQUIRED):
* Set the object required for modification.
*/
public void setObject(Object object) {
this.object = object;
}
/**
* INTERNAL:
* Set the ObjectChangeSet representing the object to be written
*/
public void setObjectChangeSet(ObjectChangeSet changeSet) {
this.objectChangeSet = changeSet;
}
/**
* INTERNAL:
* Set the primary key for the query.
*/
public void setPrimaryKey(Vector primaryKey) {
this.primaryKey = primaryKey;
}
public String toString() {
return Helper.getShortClassName(getClass()) + "(" + String.valueOf(getObject()) + ")";
}
}
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