public synchronized T requireHandlerByFormatOrFileName()

in commons-geometry-io-core/src/main/java/org/apache/commons/geometry/io/core/BoundaryIOManager.java [398:423]

23 lines of code
6 McCabe index (conditional complexity)


        public synchronized T requireHandlerByFormatOrFileName(final GeometryFormat fmt, final String fileName) {
            T handler = null;
            if (fmt != null) {
                handler = getByFormat(fmt);

                if (handler == null) {
                    throw new IllegalArgumentException(MessageFormat.format(
                            "Failed to find handler for format \"{0}\"", fmt.getFormatName()));
                }
            } else {
                final String fileExt = GeometryIOUtils.getFileExtension(fileName);
                if (fileExt != null && !fileExt.isEmpty()) {
                    handler = getByFileExtension(fileExt);

                    if (handler == null) {
                        throw new IllegalArgumentException(MessageFormat.format(
                               "Failed to find handler for file extension \"{0}\"", fileExt));
                    }
                } else {
                    throw new IllegalArgumentException(
                            "Failed to find handler: no format specified and no file extension available");
                }
            }

            return handler;
        }