CODEWITHSUNDEEP
javaalgorithmrefactoring
D.Tomov
D.Tomov

Reputation: 1158

How would i get the subpath from a specific directory from a path?

Okay I can't quite word it, but i need the following:

C:\Temp\Something\GroupName\...\file.ts -> GroupName\...\file.ts

I want to extract the path from a folder till the end.

I came up with this disaster right here, but I am sure i am reinventing the wheel.

private Path extractGroupPath(Path path, String groupName) {
    int i;
    for (i = 0; i < path.getNameCount(); i++) {
        if (path.getName(i).startsWith(groupName)) {
            break;
        }
    }
    Path groupPath = Paths.get("");
    for (; i < path.getNameCount(); i++) {
        groupPath = groupPath.resolve(path.getName(i));
    }
    return groupPath;
}

Upvotes: 1

Views: 1303

Answers (2)

D.Tomov
D.Tomov

Reputation: 1158

The answer Thomas gives is awesome and does what I needed, but in the end I decided this:

   public Path extractGroupPath(Path path, String groupName) {
        int startIndex = path.toString().indexOf(groupName);
        String groupPath = path.toString().substring(startIndex);
        return Paths.get(groupPath);
    }

Because it is more simple and easy to understand.

Upvotes: 0

Thomas
Thomas

Reputation: 88707

To get the a relative path between to paths you can use the relativize() method.

Thus you should be able to do this once you've found the base path, which - if you don't know it already - could be done by iterating through the parents (using getParent()) until you find it (by checking getFilename()) or hit the root. Then it should be as easy as parentPath.relativize(path).

Upvotes: 1

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