/**
* Executes a query.
*
* @param query query to be executed
* @return list of serialized result items
* @throws IOException error during query execution
*/
private StringList execute(final WebDAVQuery query) throws IOException {
final ClassLoader cl = getClass().getClassLoader();
final InputStream s = cl.getResourceAsStream(FILE);
if (s == null) throw new IOException("WebDAV module not found");
final byte[] module = new IOStream(s).read();
final QueryProcessor qp = new QueryProcessor(query.toString(), http.context());
try {
for (final Entry<String, Object> entry : query.entries()) {
qp.bind(entry.getKey(), entry.getValue());
}
qp.ctx.parseLibrary(string(module), FILE, qp.sc);
final Result r = qp.execute();
final int n = (int) r.size();
final StringList items = new StringList(n);
for (int i = 0; i < n; i++) {
final ArrayOutput ao = new ArrayOutput();
r.serialize(Serializer.get(ao), 0);
items.add(ao.toString());
}
return items;
} catch (final QueryException ex) {
throw new BaseXException(ex);
} catch (final Exception ex) {
Util.debug(ex);
throw new BaseXException(ex);
} finally {
qp.close();
}
}
/**
* Creates a new lock for the specified resource.
*
* @param db database
* @param p path
* @param scope lock scope
* @param type lock type
* @param depth lock depth
* @param user lock user
* @param to lock timeout
* @return lock token
* @throws IOException I/O exception
*/
public String lock(
final String db,
final String p,
final String scope,
final String type,
final String depth,
final String user,
final Long to)
throws IOException {
initLockDb();
final String token = UUID.randomUUID().toString();
final WebDAVQuery query =
new WebDAVQuery(
"w:create-lock(" + "$path, $token, $scope, $type, $depth, $owner,$timeout)");
query.bind("path", db + SEP + p);
query.bind("token", token);
query.bind("scope", scope);
query.bind("type", type);
query.bind("depth", depth);
query.bind("owner", user);
query.bind("timeout", to == null ? Long.MAX_VALUE : to);
execute(query);
return token;
}
