/** Compare the attributes. Return true if they are alike. Ignore the order of the elements. */
private boolean compareAttributeValuesWithoutOrder(
Object collection1, Object collection2, AbstractSession session) {
ContainerPolicy cp = this.getContainerPolicy();
Vector vector2 = cp.vectorFor(collection2, session); // "clone" it so we can clear out the slots
for (Object iter1 = cp.iteratorFor(collection1); cp.hasNext(iter1); ) {
Object element1 = cp.next(iter1, session);
boolean found = false;
for (int i = 0; i < vector2.size(); i++) {
if (this.compareElements(element1, vector2.elementAt(i), session)) {
found = true;
vector2.setElementAt(XXX, i); // clear out the matching element
break; // matching element found - skip the rest of them
}
}
if (!found) {
return false;
}
}
// look for elements that were not in collection1
for (Enumeration stream = vector2.elements(); stream.hasMoreElements(); ) {
if (stream.nextElement() != XXX) {
return false;
}
}
return true;
}
/**
* Build and return the change record that results from comparing the two collection attributes.
* The order of the elements is significant.
*/
private ChangeRecord compareAttributeValuesForChangeWithOrder(
Object cloneCollection,
Object backupCollection,
ObjectChangeSet owner,
AbstractSession session) {
ContainerPolicy cp = this.getContainerPolicy();
Vector cloneVector =
cp.vectorFor(
cloneCollection,
session); // convert it to a Vector so we can preserve the order and use indexes
Vector backupVector =
cp.vectorFor(backupCollection, session); // "clone" it so we can clear out the slots
EISOrderedCollectionChangeRecord changeRecord =
new EISOrderedCollectionChangeRecord(
owner, this.getAttributeName(), this.getDatabaseMapping());
for (int i = 0; i < cloneVector.size(); i++) {
Object cloneElement = cloneVector.elementAt(i);
boolean found = false;
for (int j = 0; j < backupVector.size(); j++) {
if (this.compareElementsForChange(cloneElement, backupVector.elementAt(j), session)) {
// the clone element was found in the backup collection
found = true;
backupVector.setElementAt(XXX, j); // clear out the matching backup element
changeRecord.addMovedChangeSet(this.buildChangeSet(cloneElement, owner, session), j, i);
break; // matching backup element found - skip the rest of them
}
}
if (!found) {
// the clone element was not found, so it must have been added
changeRecord.addAddedChangeSet(this.buildChangeSet(cloneElement, owner, session), i);
}
}
for (int i = 0; i < backupVector.size(); i++) {
Object backupElement = backupVector.elementAt(i);
if (backupElement != XXX) {
// the backup element was not in the clone collection, so it must have been removed
changeRecord.addRemovedChangeSet(this.buildChangeSet(backupElement, owner, session), i);
}
}
if (changeRecord.hasChanges()) {
return changeRecord;
} else {
return null;
}
}
/**
* Compare the attributes. Return true if they are alike. The order of the elements is
* significant.
*/
private boolean compareAttributeValuesWithOrder(
Object collection1, Object collection2, AbstractSession session) {
ContainerPolicy cp = this.getContainerPolicy();
Object iter1 = cp.iteratorFor(collection1);
Object iter2 = cp.iteratorFor(collection2);
while (cp.hasNext(iter1)) {
if (!this.compareElements(cp.next(iter1, session), cp.next(iter2, session), session)) {
return false;
}
}
return true;
}
/**
* Merge changes from the source to the target object. Make the necessary removals and adds and
* map key modifications.
*/
private void mergeChangesIntoObjectWithoutOrder(
Object target, ChangeRecord changeRecord, Object source, MergeManager mergeManager) {
EISCollectionChangeRecord sdkChangeRecord = (EISCollectionChangeRecord) changeRecord;
ContainerPolicy cp = this.getContainerPolicy();
AbstractSession session = mergeManager.getSession();
Object targetCollection = null;
if (sdkChangeRecord.getOwner().isNew()) {
targetCollection = cp.containerInstance(sdkChangeRecord.getAdds().size());
} else {
targetCollection = this.getRealCollectionAttributeValueFromObject(target, session);
}
Vector removes = sdkChangeRecord.getRemoves();
Vector adds = sdkChangeRecord.getAdds();
Vector changedMapKeys = sdkChangeRecord.getChangedMapKeys();
synchronized (targetCollection) {
for (Enumeration stream = removes.elements(); stream.hasMoreElements(); ) {
Object removeElement =
this.buildRemovedElementFromChangeSet(stream.nextElement(), mergeManager);
Object targetElement = null;
for (Object iter = cp.iteratorFor(targetCollection); cp.hasNext(iter); ) {
targetElement = cp.next(iter, session);
if (this.compareElements(targetElement, removeElement, session)) {
break; // matching element found - skip the rest of them
}
}
if (targetElement != null) {
// a matching element was found, remove it
cp.removeFrom(targetElement, targetCollection, session);
}
}
for (Enumeration stream = adds.elements(); stream.hasMoreElements(); ) {
Object addElement = this.buildAddedElementFromChangeSet(stream.nextElement(), mergeManager);
cp.addInto(addElement, targetCollection, session);
}
for (Enumeration stream = changedMapKeys.elements(); stream.hasMoreElements(); ) {
Object changedMapKeyElement =
this.buildAddedElementFromChangeSet(stream.nextElement(), mergeManager);
Object originalElement =
((UnitOfWorkImpl) session).getOriginalVersionOfObject(changedMapKeyElement);
cp.removeFrom(originalElement, targetCollection, session);
cp.addInto(changedMapKeyElement, targetCollection, session);
}
}
// reset the attribute to allow for set method to re-morph changes if the collection is not
// being stored directly
this.setRealAttributeValueInObject(target, targetCollection);
}
/**
* Build and return the change record that results from comparing the two collection attributes.
* Ignore the order of the elements.
*/
private ChangeRecord compareAttributeValuesForChangeWithoutOrder(
Object cloneCollection,
Object backupCollection,
ObjectChangeSet owner,
AbstractSession session) {
ContainerPolicy cp = this.getContainerPolicy();
Vector backupVector =
cp.vectorFor(backupCollection, session); // "clone" it so we can clear out the slots
EISCollectionChangeRecord changeRecord =
new EISCollectionChangeRecord(owner, this.getAttributeName(), this.getDatabaseMapping());
for (Object cloneIter = cp.iteratorFor(cloneCollection); cp.hasNext(cloneIter); ) {
Object cloneElement = cp.next(cloneIter, session);
boolean found = false;
for (int i = 0; i < backupVector.size(); i++) {
if (this.compareElementsForChange(cloneElement, backupVector.elementAt(i), session)) {
// the clone element was found in the backup collection
found = true;
backupVector.setElementAt(XXX, i); // clear out the matching backup element
if (this.mapKeyHasChanged(cloneElement, session)) {
changeRecord.addChangedMapKeyChangeSet(
this.buildChangeSet(cloneElement, owner, session));
}
break; // matching backup element found - skip the rest of them
}
}
if (!found) {
// the clone element was not found, so it must have been added
changeRecord.addAddedChangeSet(this.buildChangeSet(cloneElement, owner, session));
}
}
for (int i = 0; i < backupVector.size(); i++) {
Object backupElement = backupVector.elementAt(i);
if (backupElement != XXX) {
// the backup element was not in the clone collection, so it must have been removed
changeRecord.addRemovedChangeSet(this.buildChangeSet(backupElement, owner, session));
}
}
if (changeRecord.hasChanges()) {
return changeRecord;
} else {
return null;
}
}
/**
* Merge changes from the source to the target object. Simply replace the entire target
* collection.
*/
private void mergeChangesIntoObjectWithOrder(
Object target, ChangeRecord changeRecord, Object source, MergeManager mergeManager) {
ContainerPolicy cp = this.getContainerPolicy();
AbstractSession session = mergeManager.getSession();
Vector changes = ((EISOrderedCollectionChangeRecord) changeRecord).getNewCollection();
Object targetCollection = cp.containerInstance(changes.size());
for (Enumeration stream = changes.elements(); stream.hasMoreElements(); ) {
Object targetElement =
this.buildAddedElementFromChangeSet(stream.nextElement(), mergeManager);
cp.addInto(targetElement, targetCollection, session);
}
// reset the attribute to allow for set method to re-morph changes if the collection is not
// being stored directly
this.setRealAttributeValueInObject(target, targetCollection);
}
/**
* Compare the attributes. Return true if they are alike. Assume the passed-in attributes are
* non-null.
*/
private boolean compareAttributeValues(
Object collection1, Object collection2, AbstractSession session) {
ContainerPolicy cp = this.getContainerPolicy();
if (cp.sizeFor(collection1) != cp.sizeFor(collection2)) {
return false;
}
// if they are both empty, go no further...
if (cp.sizeFor(collection1) == 0) {
return true;
}
if (cp.hasOrder()) {
return this.compareAttributeValuesWithOrder(collection1, collection2, session);
} else {
return this.compareAttributeValuesWithoutOrder(collection1, collection2, session);
}
}
/**
* INTERNAL: Build and return the change record that results from comparing the two collection
* attributes.
*/
public ChangeRecord compareForChange(
Object clone, Object backup, ObjectChangeSet owner, AbstractSession session) {
ContainerPolicy cp = this.getContainerPolicy();
Object cloneCollection = this.getRealCollectionAttributeValueFromObject(clone, session);
Object backupCollection = null;
if (owner.isNew()) {
backupCollection = cp.containerInstance(1);
} else {
backupCollection = this.getRealCollectionAttributeValueFromObject(backup, session);
}
if (cp.hasOrder()) {
return this.compareAttributeValuesForChangeWithOrder(
cloneCollection, backupCollection, owner, session);
} else {
return this.compareAttributeValuesForChangeWithoutOrder(
cloneCollection, backupCollection, owner, session);
}
}
/**
* INTERNAL: Merge changes from the source to the target object. Simply replace the entire target
* collection.
*/
public void mergeIntoObject(
Object target, boolean isTargetUnInitialized, Object source, MergeManager mergeManager) {
ContainerPolicy cp = this.getContainerPolicy();
AbstractSession session = mergeManager.getSession();
Object sourceCollection = this.getRealCollectionAttributeValueFromObject(source, session);
Object targetCollection = cp.containerInstance(cp.sizeFor(sourceCollection));
for (Object iter = cp.iteratorFor(sourceCollection); cp.hasNext(iter); ) {
Object targetElement = this.buildElementFromElement(cp.next(iter, session), mergeManager);
cp.addInto(targetElement, targetCollection, session);
}
// reset the attribute to allow for set method to re-morph changes if the collection is not
// being stored directly
this.setRealAttributeValueInObject(target, targetCollection);
}
