/**
* Creates the nested deltas resulting from an move operation. Convenience method for creating the
* "move to" delta. The constructor should be used to create the root delta and then the move
* operation should call this method.
*/
public void movedTo(IModelElement movedToElement, IModelElement movedFromElement) {
ModelElementDelta addedDelta = new ModelElementDelta(movedToElement);
addedDelta.kind = ADDED;
addedDelta.changeFlags |= F_MOVED_FROM;
addedDelta.movedFromHandle = movedFromElement;
insertDeltaTree(movedToElement, addedDelta);
}
/**
* Creates the nested deltas resulting from an move operation. Convenience method for creating the
* "move from" delta. The constructor should be used to create the root delta and then the move
* operation should call this method.
*/
public void movedFrom(IModelElement movedFromElement, IModelElement movedToElement) {
ModelElementDelta removedDelta = new ModelElementDelta(movedFromElement);
removedDelta.kind = REMOVED;
removedDelta.changeFlags |= F_MOVED_TO;
removedDelta.movedToHandle = movedToElement;
insertDeltaTree(movedFromElement, removedDelta);
}
/**
* Creates the nested delta deltas based on the affected element its delta, and the root of this
* delta tree. Returns the root of the created delta tree.
*/
@SuppressWarnings("unchecked")
protected ModelElementDelta createDeltaTree(IModelElement element, ModelElementDelta delta) {
ModelElementDelta childDelta = delta;
ArrayList ancestors = getAncestors(element);
if (ancestors == null) {
if (this.equalsAndSameParent(
delta.getElement(),
getElement())) { // handle case of two archives that can be equals but not in the same
// project
// the element being changed is the root element
this.kind = delta.kind;
this.changeFlags = delta.changeFlags;
this.movedToHandle = delta.movedToHandle;
this.movedFromHandle = delta.movedFromHandle;
}
} else {
for (int i = 0, size = ancestors.size(); i < size; i++) {
IModelElement ancestor = (IModelElement) ancestors.get(i);
ModelElementDelta ancestorDelta = new ModelElementDelta(ancestor);
ancestorDelta.addAffectedChild(childDelta);
childDelta = ancestorDelta;
}
}
return childDelta;
}
public void removed(IModelElement element, int flags) {
ModelElementDelta removedDelta = new ModelElementDelta(element);
insertDeltaTree(element, removedDelta);
ModelElementDelta actualDelta = getDeltaFor(element);
if (actualDelta != null) {
actualDelta.removed();
actualDelta.changeFlags |= flags;
actualDelta.affectedChildren = EMPTY_DELTA;
}
}
/** Returns the delta for a given element. Only looks below this delta. */
protected ModelElementDelta getDeltaFor(IModelElement element) {
if (this.equalsAndSameParent(
getElement(), element)) // handle case of two archives that can be equals but not
// in the same project
return this;
if (this.affectedChildren.length == 0) return null;
int childrenCount = this.affectedChildren.length;
for (int i = 0; i < childrenCount; i++) {
ModelElementDelta delta = (ModelElementDelta) this.affectedChildren[i];
if (this.equalsAndSameParent(
delta.getElement(),
element)) { // handle case of two archives that can be equals but not in the same project
return delta;
} else {
delta = delta.getDeltaFor(element);
if (delta != null) return delta;
}
}
return null;
}
/** Removes the child delta from the collection of affected children. */
public void removeAffectedChild(ModelElementDelta child) {
int index = -1;
if (this.affectedChildren != null) {
for (int i = 0; i < this.affectedChildren.length; i++) {
if (this.equalsAndSameParent(
this.affectedChildren[i].getElement(),
child.getElement())) { // handle case of two archives that can be equals but not in the
// same project
index = i;
break;
}
}
}
if (index >= 0) {
this.affectedChildren = removeAndShrinkArray(this.affectedChildren, index);
}
}
public void added(IModelElement element, int flags) {
ModelElementDelta addedDelta = new ModelElementDelta(element);
addedDelta.added();
addedDelta.changeFlags |= flags;
insertDeltaTree(element, addedDelta);
}
/** Creates the nested deltas for an opened element. */
public void opened(IModelElement element) {
ModelElementDelta delta = new ModelElementDelta(element);
delta.changed(F_OPENED);
insertDeltaTree(element, delta);
}
/** Creates the nested deltas for a closed element. */
public void closed(IModelElement element) {
ModelElementDelta delta = new ModelElementDelta(element);
delta.changed(F_CLOSED);
insertDeltaTree(element, delta);
}
/**
* Creates the nested deltas resulting from a change operation. Convenience method for creating
* change deltas. The constructor should be used to create the root delta and then a change
* operation should call this method.
*/
public ModelElementDelta changed(IModelElement element, int changeFlag) {
ModelElementDelta changedDelta = new ModelElementDelta(element);
changedDelta.changed(changeFlag);
insertDeltaTree(element, changedDelta);
return changedDelta;
}
/**
* Adds the child delta to the collection of affected children. If the child is already in the
* collection, walk down the hierarchy.
*/
protected void addAffectedChild(ModelElementDelta child) {
switch (this.kind) {
case ADDED:
case REMOVED:
// no need to add a child if this parent is added or removed
return;
case CHANGED:
this.changeFlags |= F_CHILDREN;
break;
default:
this.kind = CHANGED;
this.changeFlags |= F_CHILDREN;
}
// if a child delta is added to a compilation unit delta or below,
// it's a fine grained delta
if (this.changedElement.getElementType() >= IModelElement.MODULE) {
this.fineGrained();
}
if (this.affectedChildren == null || this.affectedChildren.length == 0) {
this.affectedChildren = new IModelElementDelta[] {child};
return;
}
ModelElementDelta existingChild = null;
int existingChildIndex = -1;
if (this.affectedChildren != null) {
for (int i = 0; i < this.affectedChildren.length; i++) {
if (this.equalsAndSameParent(
this.affectedChildren[i].getElement(),
child.getElement())) { // handle case of two archives that can be equals but not in the
// same project
existingChild = (ModelElementDelta) this.affectedChildren[i];
existingChildIndex = i;
break;
}
}
}
if (existingChild == null) { // new affected child
this.affectedChildren = growAndAddToArray(this.affectedChildren, child);
} else {
switch (existingChild.getKind()) {
case ADDED:
switch (child.getKind()) {
case ADDED: // child was added then added -> it is added
case CHANGED: // child was added then changed -> it is added
return;
case REMOVED: // child was added then removed -> noop
this.affectedChildren =
this.removeAndShrinkArray(this.affectedChildren, existingChildIndex);
return;
}
break;
case REMOVED:
switch (child.getKind()) {
case ADDED: // child was removed then added -> it is changed
child.kind = CHANGED;
this.affectedChildren[existingChildIndex] = child;
return;
case CHANGED: // child was removed then changed -> it is removed
case REMOVED: // child was removed then removed -> it is removed
return;
}
break;
case CHANGED:
switch (child.getKind()) {
case ADDED: // child was changed then added -> it is added
case REMOVED: // child was changed then removed -> it is removed
this.affectedChildren[existingChildIndex] = child;
return;
case CHANGED: // child was changed then changed -> it is changed
IModelElementDelta[] children = child.getAffectedChildren();
for (int i = 0; i < children.length; i++) {
ModelElementDelta childsChild = (ModelElementDelta) children[i];
existingChild.addAffectedChild(childsChild);
}
// update flags
boolean childHadContentFlag = (child.changeFlags & F_CONTENT) != 0;
boolean existingChildHadChildrenFlag = (existingChild.changeFlags & F_CHILDREN) != 0;
existingChild.changeFlags |= child.changeFlags;
// remove F_CONTENT flag if existing child had F_CHILDREN flag set
// (case of fine grained delta (existing child) and delta coming from
// DeltaProcessor (child))
if (childHadContentFlag && existingChildHadChildrenFlag) {
existingChild.changeFlags &= ~F_CONTENT;
}
// add the non-java resource deltas if needed
// note that the child delta always takes precedence over this existing child delta
// as non-java resource deltas are always created last (by the DeltaProcessor)
IResourceDelta[] resDeltas = child.getResourceDeltas();
if (resDeltas != null) {
existingChild.resourceDeltas = resDeltas;
existingChild.resourceDeltasCounter = child.resourceDeltasCounter;
}
return;
}
break;
default:
// unknown -> existing child becomes the child with the existing child's flags
int flags = existingChild.getFlags();
this.affectedChildren[existingChildIndex] = child;
child.changeFlags |= flags;
}
}
}
