1 /*
   2  * Copyright (c) 2010, 2011 Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 6911256 6964740 6965277 7013420
  27  * @author Maurizio Cimadamore
  28  * @summary Check that lowered try-with-resources block does not end up creating resource twice
  29  */
  30 
  31 import java.util.ArrayList;
  32 
  33 public class DuplicateResource {
  34 
  35     static class TestResource implements AutoCloseable {
  36         TestResource() {
  37             resources.add(this);
  38         }
  39         boolean isClosed = false;
  40         public void close() throws Exception {
  41             isClosed = true;
  42         }
  43     }
  44 
  45     static ArrayList<TestResource> resources = new ArrayList<TestResource>();
  46 
  47     public static void main(String[] args) {
  48         try(TestResource tr = new TestResource()) {
  49            //do something
  50         } catch (Exception e) {
  51             throw new AssertionError("Shouldn't reach here", e);
  52         }
  53         check();
  54     }
  55 
  56     public static void check() {
  57        if (resources.size() != 1) {
  58            throw new AssertionError("Expected one resource, found: " + resources.size());
  59        }
  60        TestResource resource = resources.get(0);
  61        if (!resource.isClosed) {
  62            throw new AssertionError("Resource used in try-with-resources block has not been automatically closed");
  63        }
  64     }
  65 }