7184145: (pack200) pack200 --repack throws NullPointerException when JAR file specified without path

Reviewed-by: alanb, sherman

jdk/src/share/classes/com/sun/java/util/jar/pack/Driver.java

@@ -36,6 +36,7 @@ import java.io.OutputStream;
 import java.io.PrintStream;
 import java.text.MessageFormat;
 import java.nio.file.Files;
+import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
@@ -381,12 +382,15 @@ class Driver {
         String prefix = base.getName();
         if (prefix.length() < 3)  prefix += "tmp";
 
-        File where = base.getParentFile();
+        File where = (base.getParentFile() == null && suffix.equals(".bak"))
+                ? new File(".").getAbsoluteFile()
+                : base.getParentFile();
 
-        if ( base.getParentFile() == null && suffix.equals(".bak"))
+        Path tmpfile = (where == null)
-            where = new File(".").getAbsoluteFile();
+                ? Files.createTempFile(prefix, suffix)
+                : Files.createTempFile(where.toPath(), prefix, suffix);
 
-        return Files.createTempFile(where.toPath(), prefix, suffix).toFile();
+        return tmpfile.toFile();
     }
 
     static private

jdk/test/tools/pack200/RepackTest.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+/*
+ * @test
+ * @bug 7184145
+ * @summary tests repacking of a simple named jarfile.
+ * @compile -XDignore.symbol.file Utils.java RepackTest.java
+ * @run main RepackTest
+ * @author ksrini
+ */
+public class RepackTest {
+
+    public static void main(String... args) throws Exception {
+        testRepack();
+    }
+
+    /*
+     * there are two cases we need to test, where the file in question is
+     * orpaned, ie. without a parent ie. not qualified by a parent path
+     * relative nor absolute
+     * case 1: src and dest are the same
+     * case 2: src and dest are different
+     */
+    static void testRepack() throws IOException {
+
+        // make a copy of the test specimen to local directory
+        File testFile = new File("src_tools.jar");
+        Utils.copyFile(Utils.locateJar("golden.jar"), testFile);
+        List<String> cmdsList = new ArrayList<>();
+
+        // case 1:
+        cmdsList.add(Utils.getPack200Cmd());
+        cmdsList.add("--repack");
+        cmdsList.add(testFile.getName());
+        Utils.runExec(cmdsList);
+
+        // case 2:
+        File dstFile = new File("dst_tools.jar");
+        cmdsList.clear();
+        cmdsList.add(Utils.getPack200Cmd());
+        cmdsList.add("--repack");
+        cmdsList.add(dstFile.getName());
+        cmdsList.add(testFile.getName());
+        Utils.runExec(cmdsList);
+
+        // tidy up
+        testFile.delete();
+        dstFile.delete();
+    }
+}