Method getOutputFileWriter

tool/src/org/antlr/v4/Tool.java:764–785

This method is used by all code generators to create new output files. If the outputDir set by -o is not present it will be created. The final filename is sensitive to the output directory and the directory where the grammar file was found. If -o is /tmp and the original grammar file was foo/t.

(Grammar g, String fileName)

	 *  If outputDirectory==null then write a String.
	 */
	public Writer getOutputFileWriter(Grammar g, String fileName) throws IOException {
		if (outputDirectory == null) {
			return new StringWriter();
		}
		// output directory is a function of where the grammar file lives
		// for subdir/T.g4, you get subdir here.  Well, depends on -o etc...
		File outputDir = getOutputDirectory(g.fileName);
		File outputFile = new File(outputDir, fileName);

		if (!outputDir.exists()) {
			outputDir.mkdirs();
		}
		FileOutputStream fos = new FileOutputStream(outputFile);
		OutputStreamWriter osw;
		if ( grammarEncoding!=null ) {
			osw = new OutputStreamWriter(fos, grammarEncoding);
		}
		else {
			osw = new OutputStreamWriter(fos);
		}
		return new BufferedWriter(osw);
	}

	public File getImportedGrammarFile(Grammar g, String fileName) {
		File importedFile = new File(inputDirectory, fileName);