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package oracle.toplink.essentials.internal.sessions;
import java.util.*;
import oracle.toplink.essentials.mappings.Association;
public class DirectMapChangeRecord extends ChangeRecord {
protected HashMap addObjectsList;
protected HashMap removeObjectsList;
/**
* Used for change tracking when customer sets entire collection
*/
protected transient Object originalCollection;
/**
* Used for change tracking when customer sets entire collection
*/
protected transient Object latestCollection;
public DirectMapChangeRecord() {
super();
}
public DirectMapChangeRecord(ObjectChangeSet owner) {
this.owner = owner;
}
/**
* INTERNAL:
* Use in SDK propject for the mapping of this change record
*/
public Vector getAddAssociations() {
Vector addAssociations = new Vector();
for (Iterator i = getAddObjects().keySet().iterator(); i.hasNext(); ) {
Association association = new Association();
Object key = i.next();
Object value = getAddObjects().get(key);
association.setKey(key);
association.setValue(value);
addAssociations.add(association);
}
if (addAssociations.size() == 0) {
return null;
}
return addAssociations;
}
/**
* returns true if the change set has changes
*/
public boolean hasChanges() {
return (!(getAddObjects().isEmpty() && getRemoveObjects().isEmpty())) || getOwner().isNew();
}
/**
* INTERNAL:
* This method will be used to merge one record into another
*/
public void mergeRecord(ChangeRecord mergeFromRecord, UnitOfWorkChangeSet mergeToChangeSet, UnitOfWorkChangeSet mergeFromChangeSet) {
Iterator addKeys = ((DirectMapChangeRecord)mergeFromRecord).getAddObjects().keySet().iterator();
while (addKeys.hasNext()) {
Object key = addKeys.next();
if (!this.getAddObjects().containsKey(key)) {
if (this.getRemoveObjects().containsKey(key)) {
this.getRemoveObjects().remove(key);
} else {
this.getAddObjects().put(key, ((DirectMapChangeRecord)mergeFromRecord).getAddObjects().get(key));
}
}
}
Iterator removeKeys = ((DirectMapChangeRecord)mergeFromRecord).getRemoveObjects().keySet().iterator();
while (removeKeys.hasNext()) {
Object key = removeKeys.next();
if (!this.getRemoveObjects().containsKey(key)) {
if (this.getAddObjects().containsKey(key)) {
this.getAddObjects().remove(key);
} else {
this.getRemoveObjects().put(key, ((DirectMapChangeRecord)mergeFromRecord).getRemoveObjects().get(key));
}
}
}
}
/**
* INTERNAL:
* Use in SDK propject for the mapping of this change record
*/
public void setAddAssociations(Vector addAssociations) {
HashMap addMap = new HashMap();
for (Enumeration enumtr = addAssociations.elements(); enumtr.hasMoreElements();) {
Association association = (Association)enumtr.nextElement();
addMap.put(association.getKey(), association.getValue());
}
if (addMap.isEmpty()) {
addObjectsList = null;
}
addObjectsList = addMap;
}
/**
* Used for change tracking when cutomer sets entire collection
* This is the last collection that was set on the object
*/
public Object getLatestCollection() {
return latestCollection;
}
/**
* Used for change tracking when cutomer sets entire collection
* This is the original collection that was set on the object when it was cloned
*/
public Object getOriginalCollection() {
return originalCollection;
}
/**
* INTERNAL:
* Use in SDK propject for the mapping of this change record
*/
public Vector getRemoveAssociations() {
Vector removeAssociations = new Vector();
for (Iterator i = getRemoveObjects().keySet().iterator(); i.hasNext(); ) {
Association association = new Association();
Object key = i.next();
Object value = getAddObjects().get(key);
association.setKey(key);
association.setValue(value);
removeAssociations.add(association);
}
if (removeAssociations.size() == 0) {
return null;
}
return removeAssociations;
}
/**
* INTERNAL:
* Use in SDK propject for the mapping of this change record
*/
public void setRemoveAssociations(Vector removeAssociations) {
HashMap removeMap = new HashMap();
for (Enumeration enumtr = removeAssociations.elements(); enumtr.hasMoreElements();) {
Association association = (Association)enumtr.nextElement();
removeMap.put(association.getKey(), association.getValue());
}
if (removeMap.isEmpty()) {
removeObjectsList = null;
}
removeObjectsList = removeMap;
}
/**
* ADVANCED:
* Adds the items that were added to the collection
*/
public void addAdditionChange(HashMap additions) {
if (getAddObjects().size() == 0) {
addObjectsList = additions;
return;
}
for (Iterator i = additions.keySet().iterator(); i.hasNext(); ) {
Object key = i.next();
if (getAddObjects().containsKey(key)) {
getAddObjects().put(key, additions.get(key));
} else if (additions.get(key).equals(getAddObjects().get(key))) {
getAddObjects().put(key, additions.get(key));
}
}
}
/**
* ADVANCED:
* Adds the items that were removed from the collection
*/
public void addRemoveChange(HashMap subtractions) {
if (getRemoveObjects().size() == 0) {
this.removeObjectsList = subtractions;
return;
}
for (Iterator i = subtractions.keySet().iterator(); i.hasNext(); ) {
Object key = i.next();
if (!getRemoveObjects().containsKey(key)) {
getRemoveObjects().put(key, subtractions.get(key));
} else if (subtractions.get(key).equals(getRemoveObjects().get(key))) {
getRemoveObjects().put(key, subtractions.get(key));
}
}
}
/**
* ADVANCED:
* Adds the items that were added to the collection
*/
public void addAdditionChange(Object key, Object value) {
if ( getRemoveObjects().containsKey(key) ) {
if ( value.equals(getRemoveObjects().get(key)) ) {
getRemoveObjects().remove(key);
}else {
getAddObjects().put(key, value);
}
} else {
getAddObjects().put(key, value);
}
}
/**
* ADVANCED:
* Adds the items that were removed from the collection
*/
public void addRemoveChange(Object key, Object value) {
//if an entry already exists in the remove it must remain untill added
// as it contains the original removal.
if ( getAddObjects().containsKey(key) ) {
getAddObjects().remove(key);
}else if ( ! getRemoveObjects().containsKey(key) ) {
getRemoveObjects().put(key, value);
}
}
/**
* INTERNAL:
* Sets the added items list
*/
public void setAddObjects(HashMap addObjects) {
this.addObjectsList = addObjects;
}
/**
* Used for change tracking when cutomer sets entire collection
* This is the last collection that was set on the object
*/
public void setLatestCollection(Object latestCollection) {
this.latestCollection = latestCollection;
}
/**
* Used for change tracking when cutomer sets entire collection
* This is the original collection that was set on the object when it was cloned
*/
public void setOriginalCollection(Object originalCollection) {
this.originalCollection = originalCollection;
}
/**
* INTERNAL:
* Returns the added items list
*/
public HashMap getAddObjects() {
if (addObjectsList == null) {
// addObjectsList = new Hashtable();
addObjectsList = new HashMap();
}
return addObjectsList;
}
/**
* INTERNAL:
* Sets the removed items list
*/
public void setRemoveObjects(HashMap removeObjects) {
this.removeObjectsList = removeObjects;
}
/**
* INTERNAL:
* Returns the removed items list
*/
public HashMap getRemoveObjects() {
if (removeObjectsList == null) {
removeObjectsList = new HashMap();
}
return removeObjectsList;
}
/**
* INTERNAL:
* This method will be used to update the objectsChangeSets references
*/
public void updateReferences(UnitOfWorkChangeSet mergeToChangeSet, UnitOfWorkChangeSet mergeFromChangeSet) {
//nothing for this record type to do as it does not reference any changesets
}
}