private <R> R modifyResource( DBBroker broker, Resource resource, DatabaseItemModifier<DocumentImpl, R> modifier) throws XMLDBException, LockException, PermissionDeniedException, EXistException, SyntaxException { final TransactionManager transact = broker.getBrokerPool().getTransactionManager(); final Txn transaction = transact.beginTransaction(); DocumentImpl document = null; try { document = ((AbstractEXistResource) resource).openDocument(broker, Lock.WRITE_LOCK); final SecurityManager sm = broker.getBrokerPool().getSecurityManager(); if (!document.getPermissions().validate(user, Permission.WRITE) && !sm.hasAdminPrivileges(user)) { throw new XMLDBException( ErrorCodes.PERMISSION_DENIED, "you are not the owner of this resource; owner = " + document.getPermissions().getOwner()); } final R result = modifier.modify(document); broker.storeXMLResource(transaction, document); transact.commit(transaction); return result; } catch (final EXistException ee) { transact.abort(transaction); throw ee; } catch (final XMLDBException xmldbe) { transact.abort(transaction); throw xmldbe; } catch (final LockException le) { transact.abort(transaction); throw le; } catch (final PermissionDeniedException pde) { transact.abort(transaction); throw pde; } catch (final SyntaxException se) { transact.abort(transaction); throw se; } finally { transact.close(transaction); if (document != null) { ((AbstractEXistResource) resource).closeDocument(document, Lock.WRITE_LOCK); } } }
private <R> R readResource( DBBroker broker, Resource resource, DatabaseItemReader<DocumentImpl, R> reader) throws XMLDBException, PermissionDeniedException { DocumentImpl document = null; try { document = ((AbstractEXistResource) resource).openDocument(broker, Lock.READ_LOCK); return reader.read(document); } finally { if (document != null) { ((AbstractEXistResource) resource).closeDocument(document, Lock.READ_LOCK); } } }