Example usage for jdk.nashorn.internal.runtime.options Options getFiles

Introduction

In this page you can find the example usage for jdk.nashorn.internal.runtime.options Options getFiles.

Prototype

public List<String> getFiles() 

Source Link

Document

Return the JavaScript files passed to the program

Usage

From source file:z.zee.Z.java

License:Open Source License

/**
 * Make a new Nashorn Context to compile and/or run JavaScript files.
 *
 * @param in input stream for Z//from  w w  w .jav a2  s . c  o  m
 * @param out output stream for Z
 * @param err error stream for Z
 * @param args arguments to Z
 *
 * @return null if there are problems with option parsing.
 */
@SuppressWarnings("resource")
private static Context makeContext(final InputStream in, final OutputStream out, final OutputStream err,
        final String[] args) {
    final PrintStream pout = out instanceof PrintStream ? (PrintStream) out : new PrintStream(out);
    final PrintStream perr = err instanceof PrintStream ? (PrintStream) err : new PrintStream(err);
    final PrintWriter wout = new PrintWriter(pout, true);
    final PrintWriter werr = new PrintWriter(perr, true);

    // Set up error handler.
    final ErrorManager errors = new ErrorManager(werr);
    // Set up options.
    final Options options = new Options("nashorn", werr);

    // parse options
    if (args != null) {
        try {
            options.process(args);
        } catch (final IllegalArgumentException e) {
            werr.println(bundle.getString("shell.usage"));
            options.displayHelp(e);
            return null;
        }
    }

    // detect scripting mode by any source's first character being '#'
    scripting = options.getBoolean("scripting");
    if (!scripting) {
        for (final String fileName : options.getFiles()) {
            final File firstFile = new File(fileName);
            if (firstFile.isFile()) {
                try (final FileReader fr = new FileReader(firstFile)) {
                    final int firstChar = fr.read();
                    // starts with '#
                    if (firstChar == '#') {
                        options.set("scripting", true);
                        break;
                    }
                } catch (final IOException e) {
                    // ignore this. File IO errors will be reported later anyway
                }
            }
        }
    }

    return new Context(options, errors, wout, werr, Thread.currentThread().getContextClassLoader());
}

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