/** * Check if underlying connector exists. * * @param name is the name of the connection to check. * @return true if the underlying connector is registered. */ @Override public boolean checkConnectorExists(String name) throws ManifoldCFException { beginTransaction(); try { StringSetBuffer ssb = new StringSetBuffer(); ssb.add(getRepositoryConnectionKey(name)); StringSet localCacheKeys = new StringSet(ssb); ArrayList params = new ArrayList(); String query = buildConjunctionClause( params, new ClauseDescription[] {new UnitaryClause(nameField, name)}); IResultSet set = performQuery( "SELECT " + classNameField + " FROM " + getTableName() + " WHERE " + query, params, localCacheKeys, null); if (set.getRowCount() == 0) throw new ManifoldCFException("No such connection: '" + name + "'"); IResultRow row = set.getRow(0); String className = (String) row.getValue(classNameField); IConnectorManager cm = ConnectorManagerFactory.make(threadContext); return cm.isInstalled(className); } catch (ManifoldCFException e) { signalRollback(); throw e; } catch (Error e) { signalRollback(); throw e; } finally { endTransaction(); } }