io.bdeploy.common.cfg.NonExistingPathValidator Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of api Show documentation

Public API including dependencies, ready to be used for integrations and plugins.

There is a newer version: 7.3.6

package io.bdeploy.common.cfg;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.stream.Stream;

import io.bdeploy.common.cfg.Configuration.ConfigValidator;
import io.bdeploy.common.cfg.Configuration.ValidationMessage;
import io.bdeploy.common.util.PathHelper;

@ValidationMessage("Path exists, but should not exist (or be an empty directory): %s")
public class NonExistingPathValidator implements ConfigValidator {

    @Override
    public boolean validate(String value) {
        Path p = Paths.get(value);
        if (Files.isDirectory(p)) {
            // Empty directories are OK.
            try (Stream list = Files.list(p)) {
                return !list.findAny().isPresent();
            } catch (IOException e) {
                throw new IllegalStateException("Cannot determine directory contents: " + p, e);
            }
        }
        return !PathHelper.exists(p);
    }

}