/**
* 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;
}
@SuppressWarnings("unchecked")
protected BufferingSequence(
String workspaceName,
NodeSequence delegate,
ExtractFromRow extractor,
BufferManager bufferMgr,
CachedNodeSupplier nodeCache,
boolean pack,
boolean useHeap,
boolean allowDuplicates) {
super(delegate);
assert extractor != null;
this.workspaceName = workspaceName;
this.width = delegate.width();
this.cache = nodeCache;
this.extractor = extractor;
// Set up the row factory based upon the width of the delegate sequence...
this.rowFactory = BufferedRows.serializer(nodeCache, width);
// Set up the buffer ...
SortingBuffer<Object, BufferedRow> buffer = null;
TypeFactory<?> keyType = extractor.getType();
if (allowDuplicates) {
@SuppressWarnings("rawtypes")
Serializer<? extends Comparable> keySerializer =
(Serializer<? extends Comparable<?>>) bufferMgr.serializerFor(keyType);
buffer =
bufferMgr
.createSortingWithDuplicatesBuffer(
keySerializer,
extractor.getType().getComparator(),
(BufferedRowFactory<BufferedRow>) rowFactory)
.keepSize(true)
.useHeap(useHeap)
.make();
} else {
BTreeKeySerializer<Object> keySerializer =
(BTreeKeySerializer<Object>) bufferMgr.bTreeKeySerializerFor(keyType, pack);
if (keySerializer instanceof KeySerializerWithComparator) {
keySerializer =
((KeySerializerWithComparator<Object>) keySerializer)
.withComparator(extractor.getType().getComparator());
}
buffer =
bufferMgr
.createSortingBuffer(keySerializer, (BufferedRowFactory<BufferedRow>) rowFactory)
.keepSize(true)
.useHeap(useHeap)
.make();
}
this.buffer = buffer;
}
protected Batch batchFrom(final Iterator<BufferedRow> rows, final long maxBatchSize) {
if (rows == null || !rows.hasNext()) return null;
if (maxBatchSize == 0 || remainingRowCount.get() <= 0)
return NodeSequence.emptyBatch(workspaceName, this.width);
final long rowsInBatch = Math.min(maxBatchSize, remainingRowCount.get());
rowsLeftInBatch.set(rowsInBatch);
return new Batch() {
private BufferedRow current;
@Override
public int width() {
return width;
}
@Override
public long rowCount() {
return rowsInBatch;
}
@Override
public String getWorkspaceName() {
return workspaceName;
}
@Override
public boolean isEmpty() {
return rowsInBatch <= 0;
}
@Override
public boolean hasNext() {
return rowsLeftInBatch.get() > 0 && rows.hasNext();
}
@Override
public void nextRow() {
current = rows.next();
remainingRowCount.decrementAndGet();
rowsLeftInBatch.decrementAndGet();
}
@Override
public CachedNode getNode() {
return current.getNode();
}
@Override
public CachedNode getNode(int index) {
return current.getNode(index);
}
@Override
public float getScore() {
return current.getScore();
}
@Override
public float getScore(int index) {
return current.getScore(index);
}
@Override
public String toString() {
return "(buffered-batch size=" + rowsInBatch + " )";
}
};
}
