Example usage for org.apache.commons.jci.compilers JavaCompiler setCompilationProblemHandler

Introduction

In this page you can find the example usage for org.apache.commons.jci.compilers JavaCompiler setCompilationProblemHandler.

Prototype

void setCompilationProblemHandler(final CompilationProblemHandler pHandler);

Source Link

Document

Set the the handler that gets the notification of an error or warning as soon as this information is available from the compiler.

Usage

From source file:org.apache.commons.jci.examples.commandline.CommandlineCompiler.java

public static void main(String[] args) throws Exception {

    final Options options = new Options();

    options.addOption(OptionBuilder.withArgName("a.jar:b.jar").hasArg().withValueSeparator(':')
            .withDescription("Specify where to find user class files").create("classpath"));

    options.addOption(OptionBuilder.withArgName("release").hasArg()
            .withDescription("Provide source compatibility with specified release").create("source"));

    options.addOption(OptionBuilder.withArgName("release").hasArg()
            .withDescription("Generate class files for specific VM version").create("target"));

    options.addOption(OptionBuilder.withArgName("path").hasArg()
            .withDescription("Specify where to find input source files").create("sourcepath"));

    options.addOption(OptionBuilder.withArgName("directory").hasArg()
            .withDescription("Specify where to place generated class files").create("d"));

    options.addOption(OptionBuilder.withArgName("num").hasArg()
            .withDescription("Stop compilation after these number of errors").create("Xmaxerrs"));

    options.addOption(OptionBuilder.withArgName("num").hasArg()
            .withDescription("Stop compilation after these number of warning").create("Xmaxwarns"));

    options.addOption(OptionBuilder.withDescription("Generate no warnings").create("nowarn"));

    //        final HelpFormatter formatter = new HelpFormatter();
    //        formatter.printHelp("jci", options);

    final CommandLineParser parser = new GnuParser();
    final CommandLine cmd = parser.parse(options, args, true);

    ClassLoader classloader = CommandlineCompiler.class.getClassLoader();
    File sourcepath = new File(".");
    File targetpath = new File(".");
    int maxerrs = 10;
    int maxwarns = 10;
    final boolean nowarn = cmd.hasOption("nowarn");

    final JavaCompiler compiler = new JavaCompilerFactory().createCompiler("eclipse");
    final JavaCompilerSettings settings = compiler.createDefaultSettings();

    for (Iterator it = cmd.iterator(); it.hasNext();) {
        final Option option = (Option) it.next();
        if ("classpath".equals(option.getOpt())) {
            final String[] values = option.getValues();
            final URL[] urls = new URL[values.length];
            for (int i = 0; i < urls.length; i++) {
                urls[i] = new File(values[i]).toURL();
            }/*from   w  ww.  j av  a 2s .  c  o m*/
            classloader = new URLClassLoader(urls);
        } else if ("source".equals(option.getOpt())) {
            settings.setSourceVersion(option.getValue());
        } else if ("target".equals(option.getOpt())) {
            settings.setTargetVersion(option.getValue());
        } else if ("sourcepath".equals(option.getOpt())) {
            sourcepath = new File(option.getValue());
        } else if ("d".equals(option.getOpt())) {
            targetpath = new File(option.getValue());
        } else if ("Xmaxerrs".equals(option.getOpt())) {
            maxerrs = Integer.parseInt(option.getValue());
        } else if ("Xmaxwarns".equals(option.getOpt())) {
            maxwarns = Integer.parseInt(option.getValue());
        }
    }

    final ResourceReader reader = new FileResourceReader(sourcepath);
    final ResourceStore store = new FileResourceStore(targetpath);

    final int maxErrors = maxerrs;
    final int maxWarnings = maxwarns;
    compiler.setCompilationProblemHandler(new CompilationProblemHandler() {
        int errors = 0;
        int warnings = 0;

        public boolean handle(final CompilationProblem pProblem) {

            if (pProblem.isError()) {
                System.err.println(pProblem);

                errors++;

                if (errors >= maxErrors) {
                    return false;
                }
            } else {
                if (!nowarn) {
                    System.err.println(pProblem);
                }

                warnings++;

                if (warnings >= maxWarnings) {
                    return false;
                }
            }

            return true;
        }
    });

    final String[] resource = cmd.getArgs();

    for (int i = 0; i < resource.length; i++) {
        System.out.println("compiling " + resource[i]);
    }

    final CompilationResult result = compiler.compile(resource, reader, store, classloader);

    System.out.println(result.getErrors().length + " errors");
    System.out.println(result.getWarnings().length + " warnings");

}

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