7005986: (zipfs) ZipPath.startsWith() fails because of the implementation of getName(index)

Summary: Updated starsWith/endsWith to be consistent with default file system
Reviewed-by: alanb

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

@@ -265,7 +265,7 @@ public class ZipPath implements Path {
 
     @Override
     public boolean isAbsolute() {
-        return (this.path[0] == '/');
+        return (this.path.length > 0 && path[0] == '/');
     }
 
     @Override
@@ -298,32 +298,40 @@ public class ZipPath implements Path {
     @Override
     public boolean startsWith(Path other) {
         final ZipPath o = checkPath(other);
-        if (o.isAbsolute() != this.isAbsolute())
+        if (o.isAbsolute() != this.isAbsolute() ||
+            o.path.length > this.path.length)
             return false;
-        final int oCount = o.getNameCount();
-        if (getNameCount() < oCount)
-            return false;
-        for (int i = 0; i < oCount; i++) {
-            if (!o.getName(i).equals(getName(i)))
+        int olast = o.path.length;
+        for (int i = 0; i < olast; i++) {
+            if (o.path[i] != this.path[i])
                 return false;
         }
-        return true;
+        olast--;
+        return o.path.length == this.path.length ||
+               o.path[olast] == '/' ||
+               this.path[olast + 1] == '/';
     }
 
     @Override
     public boolean endsWith(Path other) {
         final ZipPath o = checkPath(other);
-        if (o.isAbsolute())
-            return this.isAbsolute() ? this.equals(o) : false;
-        int i = o.getNameCount();
-        int j = this.getNameCount();
-        if (j < i)
+        int olast = o.path.length - 1;
+        if (olast > 0 && o.path[olast] == '/')
+            olast--;
+        int last = this.path.length - 1;
+        if (last > 0 && this.path[last] == '/')
+            last--;
+        if (olast == -1)    // o.path.length == 0
+            return last == -1;
+        if ((o.isAbsolute() &&(!this.isAbsolute() || olast != last)) ||
+            (last < olast))
             return false;
-        for (--i, --j; i >= 0; i--, j--) {
-            if (!o.getName(i).equals(this.getName(j)))
+        for (; olast >= 0; olast--, last--) {
+            if (o.path[olast] != this.path[last])
                 return false;
         }
-        return true;
+        return o.path[olast + 1] == '/' ||
+               last == -1 || this.path[last] == '/';
     }
 
     @Override

test/demo/zipfs/PathOps.java

@@ -252,31 +252,41 @@ public class PathOps {
             .name("foo");
 
         // startsWith
+        test("")
+            .starts("")
+            .notStarts("/");
         test("/")
             .starts("/")
             .notStarts("/foo");
         test("/foo")
             .starts("/")
             .starts("/foo")
-            .notStarts("/f");
+            .notStarts("/f")
+            .notStarts("");
         test("/foo/bar")
             .starts("/")
             .starts("/foo")
+            .starts("/foo/")
             .starts("/foo/bar")
             .notStarts("/f")
             .notStarts("foo")
-            .notStarts("foo/bar");
+            .notStarts("foo/bar")
+            .notStarts("");
         test("foo")
             .starts("foo")
             .notStarts("f");
         test("foo/bar")
             .starts("foo")
+            .starts("foo/")
             .starts("foo/bar")
             .notStarts("f")
             .notStarts("/foo")
             .notStarts("/foo/bar");
 
         // endsWith
+        test("")
+            .ends("")
+            .notEnds("/");
         test("/")
             .ends("/")
             .notEnds("foo")
@@ -288,14 +298,24 @@ public class PathOps {
         test("/foo/bar")
             .ends("bar")
             .ends("foo/bar")
+            .ends("foo/bar/")
+            .ends("/foo/bar")
+            .notEnds("/bar");
+        test("/foo/bar/")
+            .ends("bar")
+            .ends("foo/bar")
+            .ends("foo/bar/")
             .ends("/foo/bar")
             .notEnds("/bar");
         test("foo")
             .ends("foo");
         test("foo/bar")
             .ends("bar")
+            .ends("bar/")
+            .ends("foo/bar/")
             .ends("foo/bar");
 
+
         // elements
         test("a/b/c")
             .element(0,"a")
@@ -309,6 +329,8 @@ public class PathOps {
             .absolute();
         test("tmp")
             .notAbsolute();
+        test("")
+            .notAbsolute();
 
         // resolve
         test("/tmp")

test/demo/zipfs/basic.sh

@@ -21,7 +21,7 @@
 # questions.
 #
 # @test
-# @bug 6990846 7009092 7009085 7015391 7014948
+# @bug 6990846 7009092 7009085 7015391 7014948 7005986
 # @summary Test ZipFileSystem demo
 # @build Basic PathOps ZipFSTester
 # @run shell basic.sh