1 /*
   2  * Copyright (c) 2013, 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 package sun.hotspot.tools.ctw;
  25 
  26 import java.io.BufferedReader;
  27 import java.io.IOException;
  28 import java.nio.file.Files;
  29 import java.nio.file.Path;
  30 import java.util.stream.Stream;
  31 
  32 /**
  33  * Handler for files containing a list of classes to compile.
  34  */
  35 public class ClassesListInFile extends PathHandler.PathEntry {
  36     private final BufferedReader reader;
  37 
  38     public ClassesListInFile(Path root) {
  39         super(root);
  40         if (!Files.exists(root)) {
  41             throw new Error(root + " file does not exist");
  42         }
  43         try {
  44            reader = Files.newBufferedReader(root);
  45         } catch (IOException e) {
  46             throw new Error("can not open " + root + " : " + e.getMessage(), e);
  47         }
  48     }
  49 
  50     @Override
  51     protected byte[] findByteCode(String name) {
  52         return null;
  53     }
  54 
  55     @Override
  56     protected Stream<String> classes() {
  57         return reader.lines();
  58     }
  59 
  60     @Override
  61     protected String description() {
  62         return "# list: " + root;
  63     }
  64 
  65     @Override
  66     public void close() {
  67         try {
  68             reader.close();
  69         } catch (IOException e) {
  70             throw new Error("error on closing reader for " + root
  71                     + " : "  + e.getMessage(), e);
  72         } finally {
  73             super.close();
  74         }
  75     }
  76 }