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package bjc.utils.funcutils;
import java.io.IOException;
import java.nio.file.FileVisitResult;
import java.nio.file.Path;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.function.BiPredicate;
final class FunctionalFileVisitor
extends SimpleFileVisitor<Path> {
private BiPredicate<Path, BasicFileAttributes> traversalPredicate;
private BiPredicate<Path, BasicFileAttributes> traversalAction;
public FunctionalFileVisitor(
BiPredicate<Path, BasicFileAttributes> traversalPredicate,
BiPredicate<Path, BasicFileAttributes> traversalAction) {
this.traversalPredicate = traversalPredicate;
this.traversalAction = traversalAction;
}
@Override
public FileVisitResult preVisitDirectory(Path dir,
BasicFileAttributes attrs) throws IOException {
if (traversalPredicate.test(dir, attrs)) {
return FileVisitResult.CONTINUE;
}
return FileVisitResult.SKIP_SUBTREE;
}
@Override
public FileVisitResult visitFile(Path file,
BasicFileAttributes attrs) throws IOException {
if (traversalAction.test(file, attrs)) {
return FileVisitResult.CONTINUE;
}
return FileVisitResult.TERMINATE;
}
}
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