非静态等效于 java.nio.file.Paths.get()

Question

Some Background: I am running a Jenkins Shared Library in sandbox mode, and I am unable to use any Java/Groovy static methods. An easy solution would be turn-off sandbox mode, but I must use it. Another restriction: new java.io.File(...) calls are not allowed.

Are there any non-static functions/methods that convert a sequence of strings that when joined form a path string to a Path -- ie the behaviour of java.nio.file.Paths.get() ?

Edit: I am aware of that it can be manually done quite tediously, but I would like to see if any existing function(s) exist to do this.

Answer 1

Try this:

public static Path getPath(String ... pathArr) {
    if (pathArr.length == 0)
        throw new IllegalArgumentException();
    StringBuilder path = new StringBuilder();
    for (String s : pathArr)
        path.append("/").append(s);
    return new File(path.toString()).toPath();
}

I tested, its works for paths that doesn't exist

Answer 2

println new File("/home/usr", "x.txt").toPath()
println new File("/home/usr/", "/x.txt").toPath()
println new File("/home/usr//x.txt").toPath()
println new File("/home", "usr/x.txt").toPath()

everything above gives the result:

/home/usr/x.txt

Answer 3

It seems like under the restriction of Groovy Sandbox, there are no such existing function(s) that can imitate the usage of java.nio.file.Paths.get(...) without creating a new file object. The workaround I used in my specific case of converting file 'stems' (UNIX or DOS format) into a UNIX style absolute/relative path used messy regex matching and string concatenation. It does mimic the call of java.nio.file.Paths.get(...) .

def mergePaths = { String first, String... rest ->
    return first.replaceAll(/(\\$)|(\/$)/, '').replaceAll(/(\\)/, '/') + '/' +
        rest.collect { it ->
            it.replaceAll(/(^\\)|(^\/)|(\\$)|(\/$)/, '')
        }.collect { it ->
            it.replaceAll(/(\\)/, '/')
        }.join('/')
}