*/
// 1. modified items
for (Iterator it = changes.modifiedStates(); it.hasNext();) {
ItemState state = (ItemState) it.next();
if (state.isNode()) {
// node changed
// covers the following cases:
// 1) property added
// 2) property removed
// 3) child node added
// 4) child node removed
// 5) node moved
// 6) node reordered
// cases 1) and 2) are detected with added and deleted states
// on the PropertyState itself.
// cases 3) and 4) are detected with added and deleted states
// on the NodeState itself.
// in case 5) two or three nodes change. two nodes are changed
// when a child node is renamed. three nodes are changed when
// a node is really moved. In any case we are only interested in
// the node that actually got moved.
// in case 6) only one node state changes. the state of the
// parent node.
NodeState n = (NodeState) state;
if (n.hasOverlayedState()) {
NodeId oldParentId = n.getOverlayedState().getParentId();
NodeId newParentId = n.getParentId();
if (newParentId != null && !oldParentId.equals(newParentId)) {
// node moved
// generate node removed & node added event
NodeState oldParent;
try {
oldParent = (NodeState) changes.get(oldParentId);
} catch (NoSuchItemStateException e) {
// old parent has been deleted, retrieve from
// shared item state manager
oldParent = (NodeState) stateMgr.getItemState(oldParentId);
}
NodeTypeImpl oldParentNodeType = getNodeType(oldParent, session);
Set mixins = oldParent.getMixinTypeNames();
Path newPath = getPath(n.getNodeId(), hmgr);
Path oldPath = getZombiePath(n.getNodeId(), hmgr);
if (!oldPath.equals(newPath)) {
events.add(EventState.childNodeRemoved(oldParentId,
getParent(oldPath),
n.getNodeId(),
oldPath.getNameElement(),
oldParentNodeType,
mixins,
session));
NodeState newParent = (NodeState) changes.get(newParentId);
NodeTypeImpl newParentNodeType = getNodeType(newParent, session);
mixins = newParent.getMixinTypeNames();
events.add(EventState.childNodeAdded(newParentId,
getParent(newPath),
n.getNodeId(),
newPath.getNameElement(),
newParentNodeType,
mixins,
session));
} else {
log.error("Unable to calculate old path of moved node");
}
} else {
// a moved node always has a modified parent node
NodeState parent = null;
try {
// root node does not have a parent UUID
if (state.getParentId() != null) {
parent = (NodeState) changes.get(state.getParentId());
}
} catch (NoSuchItemStateException e) {
// should never happen actually. this would mean
// the parent of this modified node is deleted
String msg = "Parent of node " + state.getId() + " is deleted.";
log.error(msg);
throw new ItemStateException(msg, e);
}
if (parent != null) {
// check if node has been renamed
NodeState.ChildNodeEntry moved = null;
for (Iterator removedNodes = parent.getRemovedChildNodeEntries().iterator(); removedNodes.hasNext();) {
NodeState.ChildNodeEntry child = (NodeState.ChildNodeEntry) removedNodes.next();
if (child.getId().equals(n.getNodeId())) {
// found node re-added with different name
moved = child;
}
}
if (moved != null) {
NodeTypeImpl nodeType = getNodeType(parent, session);
Set mixins = parent.getMixinTypeNames();
Path newPath = getPath(state.getId(), hmgr);
Path parentPath = getParent(newPath);
Path oldPath;
try {
if (moved.getIndex() == 0) {
oldPath = Path.create(parentPath, moved.getName(), false);
} else {
oldPath = Path.create(parentPath, moved.getName(), moved.getIndex(), false);
}
} catch (MalformedPathException e) {
// should never happen actually
String msg = "Malformed path for item: " + state.getId();
log.error(msg);
throw new ItemStateException(msg, e);
}
events.add(EventState.childNodeRemoved(parent.getNodeId(),
parentPath,
n.getNodeId(),
oldPath.getNameElement(),
nodeType,
mixins,
session));
events.add(EventState.childNodeAdded(parent.getNodeId(),
parentPath,
n.getNodeId(),
newPath.getNameElement(),
nodeType,
mixins,
session));
}
}
}
}
// check if child nodes of modified node state have been reordered
List reordered = n.getReorderedChildNodeEntries();
NodeTypeImpl nodeType = getNodeType(n, session);
Set mixins = n.getMixinTypeNames();
if (reordered.size() > 0) {
// create a node removed and a node added event for every
// reorder
for (Iterator ro = reordered.iterator(); ro.hasNext();) {
NodeState.ChildNodeEntry child = (NodeState.ChildNodeEntry) ro.next();
QName name = child.getName();
int index = (child.getIndex() != 1) ? child.getIndex() : 0;
Path parentPath = getPath(n.getNodeId(), hmgr);
Path.PathElement addedElem = Path.create(name, index).getNameElement();
// get removed index
NodeState overlayed = (NodeState) n.getOverlayedState();
NodeState.ChildNodeEntry entry = overlayed.getChildNodeEntry(child.getId());
if (entry == null) {
throw new ItemStateException("Unable to retrieve old child index for item: " + child.getId());
}
int oldIndex = (entry.getIndex() != 1) ? entry.getIndex() : 0;
Path.PathElement removedElem = Path.create(name, oldIndex).getNameElement();
events.add(EventState.childNodeRemoved(n.getNodeId(),
parentPath,
child.getId(),
removedElem,
nodeType,
mixins,
session));
events.add(EventState.childNodeAdded(n.getNodeId(),
parentPath,
child.getId(),
addedElem,
nodeType,
mixins,
session));
}
}
} else {
// property changed
Path path = getPath(state.getId(), hmgr);
NodeState parent = (NodeState) stateMgr.getItemState(state.getParentId());
NodeTypeImpl nodeType = getNodeType(parent, session);
Set mixins = parent.getMixinTypeNames();
events.add(EventState.propertyChanged(state.getParentId(),
getParent(path),
path.getNameElement(),
nodeType,
mixins,
session));
}
}
// 2. removed items
for (Iterator it = changes.deletedStates(); it.hasNext();) {
ItemState state = (ItemState) it.next();
if (state.isNode()) {
// node deleted
NodeState n = (NodeState) state;
NodeState parent = (NodeState) stateMgr.getItemState(n.getParentId());
NodeTypeImpl nodeType = getNodeType(parent, session);
Set mixins = parent.getMixinTypeNames();
Path path = getZombiePath(state.getId(), hmgr);
events.add(EventState.childNodeRemoved(n.getParentId(),
getParent(path),
n.getNodeId(),
path.getNameElement(),
nodeType,
mixins,
session));
} else {
// property removed
// only create an event if node still exists
try {
NodeState n = (NodeState) changes.get(state.getParentId());
// node state exists -> only property removed
NodeTypeImpl nodeType = getNodeType(n, session);
Set mixins = n.getMixinTypeNames();
Path path = getZombiePath(state.getId(), hmgr);
events.add(EventState.propertyRemoved(state.getParentId(),
getParent(path),
path.getNameElement(),
nodeType,
mixins,
session));
} catch (NoSuchItemStateException e) {
// node removed as well -> do not create an event
}
}
}
// 3. added items
for (Iterator it = changes.addedStates(); it.hasNext();) {
ItemState state = (ItemState) it.next();
if (state.isNode()) {
// node created
NodeState n = (NodeState) state;
NodeId parentId = n.getParentId();
NodeState parent;
// unknown if parent node is also new
if (stateMgr.hasItemState(parentId)) {
parent = (NodeState) stateMgr.getItemState(parentId);
} else {
parent = (NodeState) changes.get(parentId);
}
NodeTypeImpl nodeType = getNodeType(parent, session);
Set mixins = parent.getMixinTypeNames();
Path path = getPath(n.getNodeId(), hmgr);
events.add(EventState.childNodeAdded(parentId,
getParent(path),
n.getNodeId(),
path.getNameElement(),
nodeType,
mixins,
session));
} else {
// property created / set
NodeState n = (NodeState) changes.get(state.getParentId());
NodeTypeImpl nodeType = getNodeType(n, session);
Set mixins = n.getMixinTypeNames();
Path path = getPath(state.getId(), hmgr);
events.add(EventState.propertyAdded(state.getParentId(),
getParent(path),
path.getNameElement(),
nodeType,
mixins,
session));