# HG changeset patch
# User igerasim
# Date 1399467040 -14400
# Node ID 39430f3393505722e0c41bd9dd50f2c2db9cbe03
# Parent  01f67b31eeb06fb3194982c4518218bd36958e7c
8042470: (fs) Path.register doesn't throw IllegalArgumentException if multiple OVERFLOW events are specified
Reviewed-by: alanb, chegar

diff -r 01f67b31eeb0 -r 39430f339350 src/share/classes/sun/nio/fs/AbstractPoller.java
--- a/src/share/classes/sun/nio/fs/AbstractPoller.java	Wed May 07 09:43:40 2014 +0400
+++ b/src/share/classes/sun/nio/fs/AbstractPoller.java	Wed May 07 16:50:40 2014 +0400
@@ -100,8 +100,6 @@
         // validate arguments before request to poller
         if (dir == null)
             throw new NullPointerException();
-        if (events.length == 0)
-            throw new IllegalArgumentException("No events to register");
         Set<WatchEvent.Kind<?>> eventSet = new HashSet<>(events.length);
         for (WatchEvent.Kind<?> event: events) {
             // standard events
@@ -114,17 +112,16 @@
             }
 
             // OVERFLOW is ignored
-            if (event == StandardWatchEventKinds.OVERFLOW) {
-                if (events.length == 1)
-                    throw new IllegalArgumentException("No events to register");
+            if (event == StandardWatchEventKinds.OVERFLOW)
                 continue;
-            }
 
             // null/unsupported
             if (event == null)
                 throw new NullPointerException("An element in event set is 'null'");
             throw new UnsupportedOperationException(event.name());
         }
+        if (eventSet.isEmpty())
+            throw new IllegalArgumentException("No events to register");
         return (WatchKey)invoke(RequestType.REGISTER, dir, eventSet, modifiers);
     }
 
diff -r 01f67b31eeb0 -r 39430f339350 test/java/nio/file/WatchService/Basic.java
--- a/test/java/nio/file/WatchService/Basic.java	Wed May 07 09:43:40 2014 +0400
+++ b/test/java/nio/file/WatchService/Basic.java	Wed May 07 16:50:40 2014 +0400
@@ -22,7 +22,7 @@
  */
 
 /* @test
- * @bug 4313887 6838333 7017446 8011537
+ * @bug 4313887 6838333 7017446 8011537 8042470
  * @summary Unit test for java.nio.file.WatchService
  * @library ..
  * @run main Basic
@@ -295,24 +295,31 @@
             // IllegalArgumentException
             System.out.println("IllegalArgumentException tests...");
             try {
-                dir.register(watcher, new WatchEvent.Kind<?>[]{ } );
+                dir.register(watcher /*empty event list*/);
                 throw new RuntimeException("IllegalArgumentException not thrown");
             } catch (IllegalArgumentException x) {
             }
             try {
                 // OVERFLOW is ignored so this is equivalent to the empty set
-                dir.register(watcher, new WatchEvent.Kind<?>[]{ OVERFLOW });
+                dir.register(watcher, OVERFLOW);
+                throw new RuntimeException("IllegalArgumentException not thrown");
+            } catch (IllegalArgumentException x) {
+            }
+            try {
+                // OVERFLOW is ignored even if specified multiple times
+                dir.register(watcher, OVERFLOW, OVERFLOW);
                 throw new RuntimeException("IllegalArgumentException not thrown");
             } catch (IllegalArgumentException x) {
             }
 
             // UnsupportedOperationException
             try {
-                dir.register(watcher, new WatchEvent.Kind<?>[]{
+                dir.register(watcher,
                              new WatchEvent.Kind<Object>() {
                                 @Override public String name() { return "custom"; }
                                 @Override public Class<Object> type() { return Object.class; }
-                             }});
+                             });
+                throw new RuntimeException("UnsupportedOperationException not thrown");
             } catch (UnsupportedOperationException x) {
             }
             try {
@@ -328,7 +335,7 @@
             // NullPointerException
             System.out.println("NullPointerException tests...");
             try {
-                dir.register(null, new WatchEvent.Kind<?>[]{ ENTRY_CREATE });
+                dir.register(null, ENTRY_CREATE);
                 throw new RuntimeException("NullPointerException not thrown");
             } catch (NullPointerException x) {
             }
@@ -380,7 +387,7 @@
 
         try {
             dir.register(watcher, new WatchEvent.Kind<?>[]{ ENTRY_CREATE });
-             throw new RuntimeException("ClosedWatchServiceException not thrown");
+            throw new RuntimeException("ClosedWatchServiceException not thrown");
         } catch (ClosedWatchServiceException  x) {
         }