/**
* 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.g then output files go in /tmp/foo.
*
* <p>The output dir -o spec takes precedence if it's absolute. E.g., if the grammar file dir is
* absolute the output dir is given precendence. "-o /tmp /usr/lib/t.g" results in "/tmp/T.java"
* as output (assuming t.g holds T.java).
*
* <p>If no -o is specified, then just write to the directory where the grammar file was found.
*
* <p>If outputDirectory==null then write a String.
*/
public Writer getOutputFile(Grammar g, String fileName) throws IOException {
if (getOutputDirectory() == null) {
return new StringWriter();
}
// output directory is a function of where the grammar file lives
// for subdir/T.g, you get subdir here. Well, depends on -o etc...
// But, if this is a .tokens file, then we force the output to
// be the base output directory (or current directory if there is not a -o)
//
File outputDir;
if (fileName.endsWith(CodeGenerator.VOCAB_FILE_EXTENSION)) {
if (haveOutputDir) {
outputDir = new File(getOutputDirectory());
} else {
outputDir = new File(".");
}
} else {
outputDir = getOutputDirectory(g.getFileName());
}
File outputFile = new File(outputDir, fileName);
if (!outputDir.exists()) {
outputDir.mkdirs();
}
FileWriter fw = new FileWriter(outputFile);
return new BufferedWriter(fw);
}