1 /*
   2  * Copyright (c) 2019, 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 package jdk.jpackage.test;
  24 
  25 import java.io.IOException;
  26 import java.nio.file.Files;
  27 import java.nio.file.Path;
  28 import java.util.Collections;
  29 import java.util.HashMap;
  30 import java.util.Map;
  31 import java.util.Objects;
  32 import java.util.regex.Matcher;
  33 import java.util.regex.Pattern;
  34 
  35 
  36 public final class CfgFile {
  37     public String getValue(String section, String key) {
  38         Objects.requireNonNull(section);
  39         Objects.requireNonNull(key);
  40 
  41         Map<String, String> entries = data.get(section);
  42         TKit.assertTrue(entries != null, String.format(
  43                 "Check section [%s] is found in [%s] cfg file", section, id));
  44 
  45         String value = entries.get(key);
  46         TKit.assertNotNull(value, String.format(
  47                 "Check key [%s] is found in [%s] section of [%s] cfg file", key,
  48                 section, id));
  49 
  50         return value;
  51     }
  52 
  53     private CfgFile(Map<String, Map<String, String>> data, String id) {
  54         this.data = data;
  55         this.id = id;
  56     }
  57 
  58     public static CfgFile readFromFile(Path path) throws IOException {
  59         TKit.trace(String.format("Read [%s] jpackage cfg file", path));
  60 
  61         final Pattern sectionBeginRegex = Pattern.compile( "\\s*\\[([^]]*)\\]\\s*");
  62         final Pattern keyRegex = Pattern.compile( "\\s*([^=]*)=(.*)" );
  63 
  64         Map<String, Map<String, String>> result = new HashMap<>();
  65 
  66         String currentSectionName = null;
  67         Map<String, String> currentSection = new HashMap<>();
  68         for (String line : Files.readAllLines(path)) {
  69             Matcher matcher = sectionBeginRegex.matcher(line);
  70             if (matcher.find()) {
  71                 if (currentSectionName != null) {
  72                     result.put(currentSectionName, Collections.unmodifiableMap(
  73                             new HashMap<>(currentSection)));
  74                 }
  75                 currentSectionName = matcher.group(1);
  76                 currentSection.clear();
  77                 continue;
  78             }
  79 
  80             matcher = keyRegex.matcher(line);
  81             if (matcher.find()) {
  82                 currentSection.put(matcher.group(1), matcher.group(2));
  83                 continue;
  84             }
  85         }
  86 
  87         if (!currentSection.isEmpty()) {
  88             result.put("", Collections.unmodifiableMap(currentSection));
  89         }
  90 
  91         return new CfgFile(Collections.unmodifiableMap(result), path.toString());
  92     }
  93 
  94     private final Map<String, Map<String, String>> data;
  95     private final String id;
  96 }