Method _transform

src/main/java/fieldnashorn/babel/Translate.java:84–135

(String c)

	}

	private Pair<String, Function<Integer, Integer>> _transform(String c) throws TranslationFailedException {

		try {
			File f = File.createTempFile("field", ".js", new File(congifurationDirectory));
			f.deleteOnExit();
			File error = File.createTempFile("field", ".error", new File(congifurationDirectory));
			error.deleteOnExit();

			FileWriter fw = new FileWriter(f);
			fw.append(c);
			fw.close();


			int success = new ProcessBuilder().directory(new File(congifurationDirectory))
							  .command(command.replace("#", f.getAbsolutePath()).split(" "))
							  .redirectError(error)
							  .start()
							  .waitFor();

			if (success == 0) {
				String code = new String(Files.readAllBytes(new File(f.getAbsolutePath() + ".5.js").toPath()));
				String mapping = new String(Files.readAllBytes(new File(f.getAbsolutePath() + ".5.js.map").toPath()));


				SourceMapConsumerV3 sm = new SourceMapConsumerV3();
				sm.parse(mapping);

				codeCache.put(c, code);

				Function<Integer, Integer> fn = x -> x;
				try {
					fn = x -> sm.getMappingForLine(x, 1)
						    .getLineNumber();
					mapCache.put(c, fn);
				} catch (NullPointerException e) {
					e.printStackTrace();
				}

				return new Pair<>((first ? preamble : "") + code, fn);
			} else {
				String code = new String(Files.readAllBytes(error.toPath()));
				throw new TranslationFailedException(code);
			}
		} catch (InterruptedException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (SourceMapParseException e) {
			e.printStackTrace();
		}
		return null;
	}

}