File separator issues on windows/linux box

Question

Below enum helps me avoid hard-coded directory values at different places in the JUNIT test cases. This seems to work in a development environment inside the IDE on a WINDOW's box.

As soon as I put this code on a LINUX box, the JUNIT classes cannot find the directories. The Files.exists(sourcePath) returns false. The same code had returned true on the IDE (windows). Any pointers on whats going wrong here?

public enum DIRECTORY {

    OUTPUT("resources/output"), RESOURCE("resources/resource"), PROCESSED_OUTPUT(
            "resources/output/resources/resource"), EXPLODED_WEBAPPS(
            "temp/webapps"), WEBAPPS("webapps");

    private String _name;

    private DIRECTORY(String _name) {

        this._name = _name;

    }

    public String getDirectoryName() {
        return _name;
    }

}

Sample usage code of the enum

private void restore_csv_files() {

        Path _processed_output = Paths.get(DIRECTORY.PROCESSED_OUTPUT
                .getDirectoryName());
        Path resource = Paths.get(DIRECTORY.RESOURCE.getDirectoryName());

        FileUtility.copy_files(_processed_output, resource);
        FileUtility.delete_files(_processed_output);
        FileUtility.delete_directory(_processed_output);

    }

File Util class

public static void copy_files(Path sourcePath, Path targetPath) {
        if (Files.exists(sourcePath) && Files.exists(targetPath)) {
            try {
                Files.walkFileTree(sourcePath, new SimpleFileVisitor<Path>() {

                    @Override
                    public FileVisitResult visitFile(final Path file,
                            final BasicFileAttributes attrs) throws IOException {
                        Files.copy(file,
                                targetPath.resolve(sourcePath.relativize(file)));
                        return FileVisitResult.CONTINUE;
                    }
                });
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        } else {
            System.out.println("Either Source or Target path does not exist");
        }
    }

Basically on the windows this thing work, but on the linux box, get a sysout "Either Source or Target path does not exist" (refer above code for sysout)

Sample Exception

java.nio.file.NoSuchFileException: webapps/web.war
    at sun.nio.fs.UnixException.translateToIOException(UnixException.java:86)
    at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)
    at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107)
    at sun.nio.fs.UnixFileAttributeViews$Basic.readAttributes(UnixFileAttributeViews.java:55)
    at com.temp.utils.FileUtility.alter_date_time_of_file(Unknown Source)
    at com.temp.webengine.WebEngineTest.test_web_app_updated_true(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)

Resources are not files, and they exist in the CLASSPATH, not in the file system. Rethink. — user207421, Apr 13 '16 at 11:19

score 5 · Answer 1 · answered Apr 13 '16 at 11:04

5

For File seperator, use System Properties

static String separator = System.getProperty("file.separator");

answered Apr 13 '16 at 11:04

Kunal Surana

659
5
14

1

I think `path.separator` will be also useful for enum `DIRECTORY` – Iwo Kucharski Apr 13 '16 at 11:07
You mean is that the reason it is failing. So you want me to use a path separator in the ENUM? – TheMonkWhoSoldHisCode Apr 13 '16 at 11:09
I don't think it is a path separator issue. If you have a look at the ENUM, the file separator is correctly used for linux (/). If at all it should have failed, it should have failed on WINDOWS box not linux. Hopefully the exception added should throw some light – TheMonkWhoSoldHisCode Apr 13 '16 at 12:32
you need to do some debugging, print the absolute path before if statement and check whether file actually exist. – Kunal Surana Apr 14 '16 at 07:11

File separator issues on windows/linux box

1 Answers1