/**
* Allows the collection of node types to be unregistered if they are not referenced by other node
* types as supertypes, default primary types of child nodes, or required primary types of child
* nodes.
*
* @param nodeTypeNames the names of the node types to be unregistered
* @param failIfNodeTypesAreUsed true if this method should fail to unregister the named node
* types if any of the node types are still in use by nodes, or false if this method should
* not perform such a check
* @throws NoSuchNodeTypeException if any of the node type names do not correspond to a registered
* node type
* @throws InvalidNodeTypeDefinitionException if any of the node types with the given names cannot
* be unregistered because they are the supertype, one of the required primary types, or a
* default primary type of a node type that is not being unregistered.
* @throws RepositoryException if any other error occurs
*/
void unregisterNodeType(Collection<Name> nodeTypeNames, boolean failIfNodeTypesAreUsed)
throws NoSuchNodeTypeException, InvalidNodeTypeDefinitionException, RepositoryException {
CheckArg.isNotNull(nodeTypeNames, "nodeTypeNames");
if (nodeTypeNames.isEmpty()) return;
if (failIfNodeTypesAreUsed) {
long start = System.nanoTime();
// Search the content graph to make sure that this type isn't being used
for (Name nodeTypeName : nodeTypeNames) {
if (isNodeTypeInUse(nodeTypeName)) {
String name = nodeTypeName.getString(context.getNamespaceRegistry());
throw new InvalidNodeTypeDefinitionException(
JcrI18n.cannotUnregisterInUseType.text(name));
}
}
long time =
TimeUnit.MILLISECONDS.convert(Math.abs(System.nanoTime() - start), TimeUnit.NANOSECONDS);
logger.debug(
"{0} milliseconds to check if any of these node types are unused before unregistering them: {1}",
time, nodeTypeNames);
}
try {
/*
* Grab an exclusive lock on this data to keep other nodes from being added/saved while the unregistration checks are occurring
*/
List<JcrNodeType> removedNodeTypes = new ArrayList<JcrNodeType>(nodeTypeNames.size());
nodeTypesLock.writeLock().lock();
final NodeTypes nodeTypes = this.nodeTypesCache;
for (Name nodeTypeName : nodeTypeNames) {
/*
* Check that the type names are valid
*/
if (nodeTypeName == null) {
throw new NoSuchNodeTypeException(JcrI18n.invalidNodeTypeName.text());
}
String name = nodeTypeName.getString(context.getNamespaceRegistry());
JcrNodeType foundNodeType = nodeTypes.getNodeType(nodeTypeName);
if (foundNodeType == null) {
throw new NoSuchNodeTypeException(JcrI18n.noSuchNodeType.text(name));
}
removedNodeTypes.add(foundNodeType);
/*
* Check that no other node definitions have dependencies on any of the named types
*/
for (JcrNodeType nodeType : nodeTypes.getAllNodeTypes()) {
// If this node is also being unregistered, don't run checks against it
if (nodeTypeNames.contains(nodeType.getInternalName())) {
continue;
}
for (JcrNodeType supertype : nodeType.supertypes()) {
if (nodeTypeName.equals(supertype.getInternalName())) {
throw new InvalidNodeTypeDefinitionException(
JcrI18n.cannotUnregisterSupertype.text(name, supertype.getName()));
}
}
for (JcrNodeDefinition childNode : nodeType.childNodeDefinitions()) {
NodeType defaultPrimaryType = childNode.getDefaultPrimaryType();
if (defaultPrimaryType != null && name.equals(defaultPrimaryType.getName())) {
throw new InvalidNodeTypeDefinitionException(
JcrI18n.cannotUnregisterDefaultPrimaryType.text(
name, nodeType.getName(), childNode.getName()));
}
if (childNode.requiredPrimaryTypeNameSet().contains(nodeTypeName)) {
throw new InvalidNodeTypeDefinitionException(
JcrI18n.cannotUnregisterRequiredPrimaryType.text(
name, nodeType.getName(), childNode.getName()));
}
}
}
}
// Create the new cache ...
NodeTypes newNodeTypes = nodeTypes.without(removedNodeTypes);
// Remove the node types from persistent storage ...
SessionCache system = repository.createSystemSession(context, false);
SystemContent systemContent = new SystemContent(system);
systemContent.unregisterNodeTypes(
removedNodeTypes.toArray(new JcrNodeType[removedNodeTypes.size()]));
systemContent.save();
// Now change the cache ...
this.nodeTypesCache = newNodeTypes;
this.schemata = null;
} finally {
nodeTypesLock.writeLock().unlock();
}
}
