/**
* Determine what nodes are affected (i.e. contain references to the items being deleted), if
* these nodes are deleted.
*
* @param affectedNodes
* @param edNode
*/
public Map<EditableObjectNode, List<EditableObjectNode>> findAffectedNodes(
List<EditableObjectNode> nodesToRemove) {
Map<EditableObjectNode, List<EditableObjectNode>> referenceLinks =
new HashMap<EditableObjectNode, List<EditableObjectNode>>();
for (TreeNode node : nodesToRemove) {
// find references to this node and its children
for (Enumeration<?> en = ((DefaultMutableTreeNode) node).preorderEnumeration();
en != null && en.hasMoreElements(); ) {
DefaultMutableTreeNode child = (DefaultMutableTreeNode) en.nextElement();
if (child instanceof EditableObjectNode) {
List<EditableObjectNode> references = findReferences((EditableObjectNode) child);
for (EditableObjectNode referencedNode : references) {
// add reference node to map
List<EditableObjectNode> refersToList = referenceLinks.get(referencedNode);
if (refersToList == null) {
refersToList = new ArrayList<EditableObjectNode>();
referenceLinks.put(referencedNode, refersToList);
}
// add child to the "refersTo" list
if (!refersToList.contains(child)) {
refersToList.add((EditableObjectNode) child);
}
}
}
}
}
// ignore references within the nodes we're removing
for (EditableObjectNode node : nodesToRemove) {
for (Enumeration<?> en = ((DefaultMutableTreeNode) node).preorderEnumeration();
en != null && en.hasMoreElements(); ) {
DefaultMutableTreeNode child = (DefaultMutableTreeNode) en.nextElement();
referenceLinks.remove(child);
}
// special case - don't include MessageSyntaxModelNode if we're removing the root
if (node.getParent() instanceof MessageSyntaxModelNode) {
MessageSyntaxModelNode syntaxModelNode = (MessageSyntaxModelNode) node.getParent();
MessageSyntaxModel syntaxModel = (MessageSyntaxModel) syntaxModelNode.getUserObject();
if (syntaxModel.getRoot() == node.getUserObject()) {
referenceLinks.remove(syntaxModelNode);
}
}
}
return referenceLinks;
}
/**
* Find all nodes that have a user-object with references to the user-object in the provided node
*
* @param node
* @return
*/
public List<EditableObjectNode> findReferences(EditableObjectNode node) {
Object referencedObject = node.getUserObject();
return findReferences(referencedObject, node.getMessageGroup());
}
