/**
* Check if the named node type is in use in any workspace in the repository
*
* @param nodeTypeName the name of the node type to check
* @return true if at least one node is using that type; false otherwise
* @throws InvalidQueryException if there is an error searching for uses of the named node type
*/
boolean isNodeTypeInUse(Name nodeTypeName) throws InvalidQueryException {
String nodeTypeString = nodeTypeName.getString(context.getNamespaceRegistry());
String expression = "SELECT * from [" + nodeTypeString + "] LIMIT 1";
TypeSystem typeSystem = context.getValueFactories().getTypeSystem();
// Parsing must be done now ...
QueryCommand command = queryParser.parseQuery(expression, typeSystem);
assert command != null : "Could not parse " + expression;
Schemata schemata = getRepositorySchemata();
// Now query the entire repository for any nodes that use this node type ...
RepositoryCache repoCache = repository.repositoryCache();
RepositoryQueryManager queryManager = repository.queryManager();
Set<String> workspaceNames = repoCache.getWorkspaceNames();
Map<String, NodeCache> overridden = null;
NodeTypes nodeTypes = repository.nodeTypeManager().getNodeTypes();
RepositoryIndexes indexDefns = repository.queryManager().getIndexes();
CancellableQuery query =
queryManager.query(
context,
repoCache,
workspaceNames,
overridden,
command,
schemata,
indexDefns,
nodeTypes,
null,
null);
try {
QueryResults result = query.execute();
if (result.isEmpty()) return false;
if (result.getRowCount() < 0) {
// Try to get the first row ...
NodeSequence seq = result.getRows();
Batch batch = seq.nextBatch();
while (batch != null) {
if (batch.hasNext()) return true;
// It's not common for the first batch may be empty, but it's possible. So try the next
// batch ...
batch = seq.nextBatch();
}
return false;
}
return result.getRowCount() > 0;
} catch (RepositoryException e) {
logger.error(e, JcrI18n.errorCheckingNodeTypeUsage, nodeTypeName, e.getLocalizedMessage());
return true;
}
}
/**
* Load all of the rows from the supplied sequence into the buffer.
*
* @param sequence the node sequence; may not be null
* @param extractor the extractor for the sortable value; may not be null
* @param rowsWithNullKey the buffer into which should be placed all rows for which the extracted
* key value is null; may be null if these are not to be kept
* @return the size of the first batch, or 0 if there are no rows found
*/
protected int loadAll(
NodeSequence sequence,
ExtractFromRow extractor,
DistinctBuffer<BufferedRow> rowsWithNullKey) {
// Put all of the batches from the sequence into the buffer
Batch batch = sequence.nextBatch();
int batchSize = 0;
Object value = null;
while (batch != null && batchSize == 0) {
while (batch.hasNext()) {
batch.nextRow();
value = extractor.getValueInRow(batch);
if (value instanceof Object[]) {
// Put each of the values in the buffer ...
for (Object v : (Object[]) value) {
buffer.put(v, createRow(batch));
}
} else if (value != null) {
buffer.put(value, createRow(batch));
} else if (rowsWithNullKey != null) {
rowsWithNullKey.addIfAbsent(createRow(batch));
}
++batchSize;
}
batch = sequence.nextBatch();
}
while (batch != null) {
while (batch.hasNext()) {
batch.nextRow();
value = extractor.getValueInRow(batch);
if (value instanceof Object[]) {
// Put each of the values in the buffer ...
for (Object v : (Object[]) value) {
buffer.put(v, createRow(batch));
}
} else if (value != null) {
buffer.put(value, createRow(batch));
} else if (rowsWithNullKey != null) {
rowsWithNullKey.addIfAbsent(createRow(batch));
}
}
batch = sequence.nextBatch();
}
return batchSize;
}
