/** * Open/creates file, returning FileChannel to access the file * * @param pathForWindows The path of the file to open/create * @param pathToCheck The path used for permission checks (if security manager) */ static FileChannel newFileChannel( String pathForWindows, String pathToCheck, Set<? extends OpenOption> options, long pSecurityDescriptor) throws WindowsException { Flags flags = Flags.toFlags(options); // default is reading; append => writing if (!flags.read && !flags.write) { if (flags.append) { flags.write = true; } else { flags.read = true; } } // validation if (flags.read && flags.append) throw new IllegalArgumentException("READ + APPEND not allowed"); if (flags.append && flags.truncateExisting) throw new IllegalArgumentException("APPEND + TRUNCATE_EXISTING not allowed"); FileDescriptor fdObj = open(pathForWindows, pathToCheck, flags, pSecurityDescriptor); return FileChannelImpl.open(fdObj, pathForWindows, flags.read, flags.write, flags.append, null); }
/** * Open/creates file, returning AsynchronousFileChannel to access the file * * @param pathForWindows The path of the file to open/create * @param pathToCheck The path used for permission checks (if security manager) * @param pool The thread pool that the channel is associated with */ static AsynchronousFileChannel newAsynchronousFileChannel( String pathForWindows, String pathToCheck, Set<? extends OpenOption> options, long pSecurityDescriptor, ThreadPool pool) throws IOException { Flags flags = Flags.toFlags(options); // Overlapped I/O required flags.overlapped = true; // default is reading if (!flags.read && !flags.write) { flags.read = true; } // validation if (flags.append) throw new UnsupportedOperationException("APPEND not allowed"); // open file for overlapped I/O FileDescriptor fdObj; try { fdObj = open(pathForWindows, pathToCheck, flags, pSecurityDescriptor); } catch (WindowsException x) { x.rethrowAsIOException(pathForWindows); return null; } // create the AsynchronousFileChannel try { return WindowsAsynchronousFileChannelImpl.open(fdObj, flags.read, flags.write, pool); } catch (IOException x) { // IOException is thrown if the file handle cannot be associated // with the completion port. All we can do is close the file. long handle = fdAccess.getHandle(fdObj); CloseHandle(handle); throw x; } }