src/share/classes/java/nio/file/FileTreeWalker.java
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rev 7023 : 8006884: (fs) Add Files.list, lines and find
Reviewed-by:
Contributed-by: alan.bateman@oracle.com, henry.jen@oracle.com
@@ -27,12 +27,12 @@
import java.nio.file.attribute.BasicFileAttributes;
import java.io.Closeable;
import java.io.IOException;
import java.util.ArrayDeque;
+import java.util.Collection;
import java.util.Iterator;
-import java.util.Set;
import sun.nio.fs.BasicFileAttributesHolder;
/**
* Walks a file tree, generating a sequence of events corresponding to the files
* in the tree.
@@ -162,21 +162,33 @@
}
}
/**
* Creates a {@code FileTreeWalker}.
+ *
+ * @throws IllegalArgumentException
+ * if {@code maxDepth} is negative
+ * @throws ClassCastException
+ * if (@code options} contains an element that is not a
+ * {@code FileVisitOption}
+ * @throws NullPointerException
+ * if {@code options} is {@ocde null} or the options
+ * array contains a {@code null} element
*/
- FileTreeWalker(Set<FileVisitOption> options, int maxDepth) {
+ FileTreeWalker(Collection<FileVisitOption> options, int maxDepth) {
boolean fl = false;
for (FileVisitOption option: options) {
// will throw NPE if options contains null
switch (option) {
case FOLLOW_LINKS : fl = true; break;
default:
throw new AssertionError("Should not get here");
}
}
+ if (maxDepth < 0)
+ throw new IllegalArgumentException("'maxDepth' is negative");
+
this.followLinks = fl;
this.linkOptions = (fl) ? new LinkOption[0] :
new LinkOption[] { LinkOption.NOFOLLOW_LINKS };
this.maxDepth = maxDepth;
}