7006576: (zipfs) Path.exists() always returns false on dirs when zip/JAR file built without dirs

7009092: (zipfs) ZipPath.isSameFile() should always return true if this Path and the given Path are equal.
7009085: (zipfs) ZipPath.normalize("/./.") returns null.
7009102: (zipfs) ZipPath.toRealPath() should always return absolute path.
Summary: zip filesystem provider update
Reviewed-by: alanb

src/share/demo/nio/zipfs/src/com/sun/nio/zipfs/ZipPath.java

@@ -157,7 +157,7 @@ public class ZipPath extends Path {
 
     @Override
     public ZipPath toRealPath(boolean resolveLinks) throws IOException {
-        ZipPath realPath = new ZipPath(zfs, getResolvedPath());
+        ZipPath realPath = new ZipPath(zfs, getResolvedPath()).toAbsolutePath();
         realPath.checkAccess();
         return realPath;
     }
@@ -472,8 +472,11 @@ public class ZipPath extends Path {
             int n = offsets[i];
             int len = (i == offsets.length - 1)?
                       (path.length - n):(offsets[i + 1] - n - 1);
-            if (len == 1 && path[n] == (byte)'.')
+            if (len == 1 && path[n] == (byte)'.') {
+                if (m == 0 && path[0] == '/')   // absolute path
+                    to[m++] = '/';
                 continue;
+            }
             if (len == 2 && path[n] == '.' && path[n + 1] == '.') {
                 if (lastMOff >= 0) {
                     m = lastM[lastMOff--];  // retreat
@@ -726,6 +729,8 @@ public class ZipPath extends Path {
 
     @Override
     public boolean isSameFile(Path other) throws IOException {
+        if (this.equals(other))
+            return true;
         if (other == null ||
             this.getFileSystem() != other.getFileSystem())
             return false;

test/demo/zipfs/PathOps.java

@@ -193,6 +193,17 @@ public class PathOps {
         return this;
     }
 
+    PathOps isSameFile(String target) {
+        try {
+            out.println("check two paths are same");
+            checkPath();
+            check(path.isSameFile(test(target).path()), true);
+        } catch (IOException ioe) {
+            fail();
+        }
+        return this;
+    }
+
     PathOps invalid() {
         if (!(exc instanceof InvalidPathException)) {
             out.println("InvalidPathException not thrown as expected");
@@ -344,7 +355,12 @@ public class PathOps {
             .normalize("foo");
         test("/foo/bar/gus/../..")
             .normalize("/foo");
-
+        test("/./.")
+            .normalize("/");
+        test("/.")
+            .normalize("/");
+        test("/./abc")
+            .normalize("/abc");
         // invalid
         test("foo\u0000bar")
             .invalid();
@@ -365,6 +381,10 @@ public class PathOps {
             .root("/")
             .parent("/foo")
             .name("bar");
+
+        // isSameFile
+        test("/fileDoesNotExist")
+            .isSameFile("/fileDoesNotExist");
     }
 
     static void npes() {

test/demo/zipfs/ZipFSTester.java

@@ -28,6 +28,7 @@ import java.nio.file.*;
 import java.nio.file.attribute.*;
 import java.net.*;
 import java.util.*;
+import java.util.zip.*;
 
 import static java.nio.file.StandardOpenOption.*;
 import static java.nio.file.StandardCopyOption.*;
@@ -42,7 +43,8 @@ public class ZipFSTester {
         FileSystem fs = null;
         try {
             fs = newZipFileSystem(Paths.get(args[0]), new HashMap<String, Object>());
-            test(fs);
+            test0(fs);
+            test1(fs);
             test2(fs);   // more tests
         } finally {
             if (fs != null)
@@ -50,11 +52,31 @@ public class ZipFSTester {
         }
     }
 
-    static void test(FileSystem fs)
+    static void test0(FileSystem fs)
         throws Exception
     {
-        Random rdm = new Random();
+        List<String> list = new LinkedList<>();
+        try (ZipFile zf = new ZipFile(fs.toString())) {
+            Enumeration<? extends ZipEntry> zes = zf.entries();
+            while (zes.hasMoreElements()) {
+                list.add(zes.nextElement().getName());
+            }
+            for (String pname : list) {
+                Path path = fs.getPath(pname);
+                if (!path.exists())
+                    throw new RuntimeException("path existence check failed!");
+                while ((path = path.getParent()) != null) {
+                    if (!path.exists())
+                        throw new RuntimeException("parent existence check failed!");
+                }
+            }
+        }
+    }
 
+    static void test1(FileSystem fs)
+        throws Exception
+    {
+        Random rdm = new Random();
         // clone a fs and test on it
         Path tmpfsPath = getTempPath();
         Map<String, Object> env = new HashMap<String, Object>();

test/demo/zipfs/basic.sh

@@ -21,7 +21,7 @@
 # questions.
 #
 # @test
-# @bug 6990846
+# @bug 6990846 7009092 7009085
 # @summary Test ZipFileSystem demo
 # @build Basic PathOps ZipFSTester
 # @run shell basic.sh